AUTOMOTIVE ELECTRICIANS
WIRING-DIAGRAMS

SEAT LEON 2014 – 1.4l petrol engine with start/stop system, CXSA . Wiring diagrams, Pin Connector, Location

    HomeSEATSEAT LEONSEAT LEON 2014SEAT LEON 2014 ALL WIRING DIAGRAMS - ENGLISH

Wiring Diagram SEAT LEON 2014 - Battery - Starter - Battery monitor control unit - Fuse holder B



Wiring Diagram SEAT LEON 2014 - Battery - Starter - Battery monitor control unit - Fuse holder B
A Battery
B Starter
J367 Battery monitor control unit
SB Fuse holder B
SB18 Fuse 18 on fuse holder B
SB23 Fuse 23 on fuse holder B
T2u 2-pin connector
  D218 Connection 1 (LIN bus) in engine compartment wiring harness

Wiring Diagram SEAT LEON 2014 - Alternator - Terminal 15 voltage supply relay - Fuse holder A - Fuse holder C



Wiring Diagram SEAT LEON 2014 - Alternator - Terminal 15 voltage supply relay - Fuse holder A - Fuse holder CUnlock Lifetime Access for This Car.
C Alternator
C1 Voltage regulator
J329 Terminal 15 voltage supply relay
SA Fuse holder A
SA1 Fuse 1 in fuse holder A
SA2 Fuse 2 in fuse holder A
SC Fuse holder C
SC41 Fuse 41 on fuse holder C
SC49 Fuse 49 on fuse holder C
T2v 2-pin connector
T4w 4-pin connector
T17a 17-pin connector, brown, in left A-pillar
T17d 17-pin connector, blue, in left A-pillar
  B698 Connection 3 (LIN bus) in main wiring harness
  D218 Connection 1 (LIN bus) in engine compartment wiring harness
*According to equipment

Wiring Diagram SEAT LEON 2014 - Ignition/starter switch - Cruise control system switch - Cruise control system (CCS) SET button - Steering column electronics control unit - Starter relay 1 - Starter relay 2 - Fuse holder B



Wiring Diagram SEAT LEON 2014 - Ignition/starter switch - Cruise control system switch - Cruise control system (CCS) SET button - Steering column electronics control unit - Starter relay 1 - Starter relay 2 - Fuse holder BUnlock Lifetime Access for This Car.
D Ignition/starter switch
E45 Cruise control system switch
E227 Cruise control system (CCS) SET button
J527 Steering column electronics control unit
J906 Starter relay 1
J907 Starter relay 2
SB Fuse holder B
SB22 Fuse 22 on fuse holder B
T6r 6-pin connector
T8d 8-pin connector
T9a 9-pin connector
T9b 9-pin connector
T16e 16-pin connector
  366 Earth connection 1, in main wiring harness
  369 Earth connection 4, in main wiring harness
  D52 Positive connection (15a), in engine compartment wiring harness
*Only models with cruise control system (CCS)

Wiring Diagram SEAT LEON 2014 - Onboard supply control unit - Steering column electronics control unit



Wiring Diagram SEAT LEON 2014 - Onboard supply control unit - Steering column electronics control unitUnlock Lifetime Access for This Car.
J519 Onboard supply control unit
J527 Steering column electronics control unit
T16e 16-pin connector
T17d 17-pin connector, blue, in left A-pillar
T73a 73-pin connector
T73c 73-pin connector

Wiring Diagram SEAT LEON 2014 - Start/Stop operation button - Driving mode selection button - Onboard supply control unit - Start/Stop operation warning lamp - Driving mode selection warning lamp



Wiring Diagram SEAT LEON 2014 - Start/Stop operation button - Driving mode selection button - Onboard supply control unit - Start/Stop operation warning lamp - Driving mode selection warning lampUnlock Lifetime Access for This Car.
E693 Start/Stop operation button
E735 Driving mode selection button
J519 Onboard supply control unit
K259 Start/Stop operation warning lamp
K280 Driving mode selection warning lamp
L51 Main switch illumination bulb for stop/start system
L76 Button illumination bulb
T6b 6-pin connector
T6z 6-pin connector
T10e 10-pin connector
T73c 73-pin connector
  367 Earth connection 2, in main wiring harness
  368 Earth connection 3, in main wiring harness
  B340 Connection 1 (58d), in main wiring harness
*According to equipment

Wiring Diagram SEAT LEON 2014 - Oil level and oil temperature sender - Engine control unit



Wiring Diagram SEAT LEON 2014 - Oil level and oil temperature sender - Engine control unitUnlock Lifetime Access for This Car.
G266 Oil level and oil temperature sender
J623 Engine control unit
T6n 6-pin connector
T17d 17-pin connector, blue, in left A-pillar
T94a 94-pin connector
  131 Earth connection 2, in engine compartment wiring harness
  201 Earth connection 5, in engine compartment wiring harness
  B273 Positive connection (15), in main wiring harness
  D17 Positive connection 1 (15), in engine harness
*Cross section depends on equipment

Wiring Diagram SEAT LEON 2014 - Brake pedal position sender - Clutch position sender - Engine control unit - Fuse holder B



Wiring Diagram SEAT LEON 2014 - Brake pedal position sender - Clutch position sender - Engine control unit - Fuse holder BUnlock Lifetime Access for This Car.
G100 Brake pedal position sender
G476 Clutch position sender
J623 Engine control unit
SB Fuse holder B
SB6 Fuse 6 on fuse holder B
T4f 4-pin connector
T5i 5-pin connector
T17d 17-pin connector, blue, in left A-pillar
T94a 94-pin connector
  131 Earth connection 2, in engine compartment wiring harness
  D73 Positive connection (54), in engine compartment wiring harness

Wiring Diagram SEAT LEON 2014 - Fuel gauge sender - Fuel system pressurisation pump - Fuel pump control unit - Engine control unit - Fuse holder B



Wiring Diagram SEAT LEON 2014 - Fuel gauge sender - Fuel system pressurisation pump - Fuel pump control unit - Engine control unit - Fuse holder BUnlock Lifetime Access for This Car.
G Fuel gauge sender
G6 Fuel system pressurisation pump
J538 Fuel pump control unit
J623 Engine control unit
SB Fuse holder B
SB10 Fuse 10 on fuse holder B
T5j 5-pin connector
T5k 5-pin connector
T17d 17-pin connector, blue, in left A-pillar
T94a 94-pin connector
  374 Earth connection 9, in main wiring harness

Wiring Diagram SEAT LEON 2014 - Vacuum sender - Main relay - Engine control unit - Fuse holder B



Wiring Diagram SEAT LEON 2014 - Vacuum sender - Main relay - Engine control unit - Fuse holder BUnlock Lifetime Access for This Car.
G608 Vacuum sender
J104 ABS control unit
J271 Main relay
J623 Engine control unit
SB Fuse holder B
SB3 Fuse 3 on fuse holder B
SB17 Fuse 17 on fuse holder B
T14a 14-pin connector, near front left longitudinal member
T38a 38-pin connector
T46a 46-pin connector
T60a 60-pin connector
T94a 94-pin connector
  209 Earth connection 6, in engine compartment wiring harness
  D78 Positive connection 1 (30a), in engine compartment wiring harness
  D180 Connection (87a), in engine compartment wiring harness
*According to equipment

Wiring Diagram SEAT LEON 2014 - Engine control unit - Injector - cylinder 1 - Injector - cylinder 2 - Injector - cylinder 3 - Injector - cylinder 4



Wiring Diagram SEAT LEON 2014 - Engine control unit - Injector - cylinder 1 - Injector - cylinder 2 - Injector - cylinder 3 - Injector - cylinder 4Unlock Lifetime Access for This Car.
J623 Engine control unit
N30 Injector, cylinder 1
N31 Injector, cylinder 2
N32 Injector, cylinder 3
N33 Injector, cylinder 4
T60a 60-pin connector

Wiring Diagram SEAT LEON 2014 - Engine control unit - Activated charcoal filter solenoid valve 1 - Camshaft control valve 1 - Fuel pressure regulating valve - Exhaust camshaft control valve 1 - Valve for oil pressure control - Fuse holder B - Continued coolant circulation pump



Wiring Diagram SEAT LEON 2014 - Engine control unit - Activated charcoal filter solenoid valve 1 - Camshaft control valve 1 - Fuel pressure regulating valve - Exhaust camshaft control valve 1 - Valve for oil pressure control - Fuse holder B - Continued coolant circulation pumpUnlock Lifetime Access for This Car.
J293 Radiator fan control unit
J623 Engine control unit
N80 Activated charcoal filter solenoid valve 1
N205 Camshaft control valve 1
N276 Fuel pressure regulating valve
N318 Exhaust camshaft control valve 1
N428 Valve for oil pressure control
SB Fuse holder B
SB4 Fuse 4 on fuse holder B
SB7 Fuse 7 on fuse holder B
T4g 4-pin connector
T14a 14-pin connector, near front left longitudinal member
T60a 60-pin connector
T94a 94-pin connector
V51 Continued coolant circulation pump
  484 Earth connection 2 (ignition coils), in engine prewiring harness
  D182 Connection 3 (87a) in engine compartment wiring harness
  D196 Connection 2 (87a) in engine prewiring harness
  D205 Connection 3 (87a) in engine prewiring harness
*see applicable current flow diagram for radiator fan
*2According to equipment

Wiring Diagram SEAT LEON 2014 - Engine control unit - Ignition coil 1 with output stage - Ignition coil 2 with output stage - Spark plug 1 - Spark plug 2 - Fuse holder B



Wiring Diagram SEAT LEON 2014 - Engine control unit - Ignition coil 1 with output stage - Ignition coil 2 with output stage - Spark plug 1 - Spark plug 2 - Fuse holder BUnlock Lifetime Access for This Car.
J623 Engine control unit
N70 Ignition coil 1 with output stage
N127 Ignition coil 2 with output stage
Q23 Spark plug 1
Q24 Spark plug 2
SB Fuse holder B
SB9 Fuse 9 on fuse holder B
T14a 14-pin connector, near front left longitudinal member
T60a 60-pin connector
  306 Earth connection (ignition coils), in engine prewiring harness
  484 Earth connection 2 (ignition coils), in engine prewiring harness
  D189 Connection (87a) in engine prewiring harness

Wiring Diagram SEAT LEON 2014 - Engine control unit - Ignition coil 3 with output stage - Ignition coil 4 with output stage - Spark plug 3 - Spark plug 4



Wiring Diagram SEAT LEON 2014 - Engine control unit - Ignition coil 3 with output stage - Ignition coil 4 with output stage - Spark plug 3 - Spark plug 4Unlock Lifetime Access for This Car.
J623 Engine control unit
N291 Ignition coil 3 with output stage
N292 Ignition coil 4 with output stage
Q25 Spark plug 3
Q26 Spark plug 4
T14a 14-pin connector, near front left longitudinal member
T60a 60-pin connector
  18 Earth point, on cylinder block
  306 Earth connection (ignition coils), in engine prewiring harness
  417 Earth connection 9, in engine compartment wiring harness
  484 Earth connection 2 (ignition coils), in engine prewiring harness
  D189 Connection (87a) in engine prewiring harness

Wiring Diagram SEAT LEON 2014 - Coolant temperature sender - Engine control unit - Charge pressure positioner



Wiring Diagram SEAT LEON 2014 - Coolant temperature sender - Engine control unit - Charge pressure positionerUnlock Lifetime Access for This Car.
G62 Coolant temperature sender
J623 Engine control unit
T60a 60-pin connector
V465 Charge pressure positioner
  458 Earth point 3, engine prewiring harness
  D141 Connection (5V) in engine prewiring harness

Wiring Diagram SEAT LEON 2014 - Hall sender - Hall sender 2 - Engine control unit



Wiring Diagram SEAT LEON 2014 - Hall sender - Hall sender 2 - Engine control unitUnlock Lifetime Access for This Car.
G40 Hall sender
G163 Hall sender 2
J623 Engine control unit
T60a 60-pin connector
  283 Earth point 2, engine prewiring harness
  D141 Connection (5V) in engine prewiring harness
  D190 Connection 3 (5V) in engine prewiring harness
*According to equipment

Wiring Diagram SEAT LEON 2014 - Intake manifold sender - Engine speed sender - Charge pressure sender - Fuel pressure sender - Intake air temperature sender 2 - Engine control unit



Wiring Diagram SEAT LEON 2014 - Intake manifold sender - Engine speed sender - Charge pressure sender - Fuel pressure sender - Intake air temperature sender 2 - Engine control unitUnlock Lifetime Access for This Car.
GX9 Intake manifold sender
G28 Engine speed sender
G31 Charge pressure sender
G42 Intake air temperature sender
G71 Intake manifold pressure sender
G247 Fuel pressure sender
G299 Intake air temperature sender 2
J623 Engine control unit
T60a 60-pin connector
  281 Earth point 1, engine prewiring harness
  D174 Connection 2 (5V) in engine prewiring harness
  D190 Connection 3 (5V) in engine prewiring harness

Wiring Diagram SEAT LEON 2014 - Lambda probe 1 after catalytic converter - Lambda probe 1 before catalytic converter - Engine control unit - Fuse holder B



Wiring Diagram SEAT LEON 2014 - Lambda probe 1 after catalytic converter - Lambda probe 1 before catalytic converter - Engine control unit - Fuse holder BUnlock Lifetime Access for This Car.
GX7 Lambda probe 1 after catalytic converter
GX10 Lambda probe 1 before catalytic converter
G39 Lambda probe
G130 Lambda probe after catalytic converter
J623 Engine control unit
SB Fuse holder B
SB8 Fuse 8 on fuse holder B
T4x 4-pin connector
T4y 4-pin connector
T94a 94-pin connector
Z19 Lambda probe heater
Z29 Lambda probe 1 heater after catalytic converter
  D181 Connection 2 (87a) in engine compartment wiring harness
*According to equipment

Wiring Diagram SEAT LEON 2014 - Lambda probe 1 before catalytic converter - Engine control unit



Wiring Diagram SEAT LEON 2014 - Lambda probe 1 before catalytic converter - Engine control unitUnlock Lifetime Access for This Car.
GX10 Lambda probe 1 before catalytic converter
G39 Lambda probe
J623 Engine control unit
T6aa 6-pin connector
T94a 94-pin connector
Z19 Lambda probe heater
  D181 Connection 2 (87a) in engine compartment wiring harness
*According to equipment

Wiring Diagram SEAT LEON 2014 - Accelerator pedal module - Throttle valve module - Engine control unit



Wiring Diagram SEAT LEON 2014 - Accelerator pedal module - Throttle valve module - Engine control unitUnlock Lifetime Access for This Car.
GX2 Accelerator pedal module
GX3 Throttle valve module
G79 Accelerator position sender
G185 Accelerator position sender 2
G186 Throttle valve drive for electric throttle
G187 Throttle valve drive angle sender 1 for electric throttle
G188 Throttle valve drive angle sender 2 for electric throttle
J338 Throttle valve module
J623 Engine control unit
T6y 6-pin connector
T60a 60-pin connector
T94a 94-pin connector
  D101 Connection 1 in engine compartment wiring harness

Wiring Diagram SEAT LEON 2014 - Oil pressure switch - Oil pressure switch for reduced oil pressure - Knock sensor 1 - Radiator outlet coolant temperature sender - Gearbox neutral position sender - Engine control unit



Wiring Diagram SEAT LEON 2014 - Oil pressure switch - Oil pressure switch for reduced oil pressure - Knock sensor 1 - Radiator outlet coolant temperature sender - Gearbox neutral position sender - Engine control unitUnlock Lifetime Access for This Car.
F22 Oil pressure switch
F378 Oil pressure switch for reduced oil pressure
G61 Knock sensor 1
G83 Radiator outlet coolant temperature sender
G701 Gearbox neutral position sender
J623 Engine control unit
T60a 60-pin connector
T94a 94-pin connector

Wiring Diagram SEAT LEON 2014 - Data bus diagnostic interface - Engine control unit - Dash panel insert



Wiring Diagram SEAT LEON 2014 - Data bus diagnostic interface - Engine control unit - Dash panel insertUnlock Lifetime Access for This Car.
H3 Buzzer and gong
J119 Multifunction indicator
J285 Control unit in dash panel insert
J533 Data bus diagnostic interface
J623 Engine control unit
KX2 Dash panel insert
K31 Cruise control system warning lamp
K132 Electronic power control fault lamp
T17a 17-pin connector, brown, in left A-pillar
T17d 17-pin connector, blue, in left A-pillar
T20a 20-pin connector
T94a 94-pin connector
  B383 Connection 1 (powertrain CAN bus, high), in main wiring harness
  B390 Connection 1 (powertrain CAN bus, low), in main wiring harness
  E123 Connection 1 (powertrain CAN bus, high), in engine wiring harness
  E124 Connection 1 (powertrain CAN bus, low), in engine wiring harness

Wiring Diagram SEAT LEON 2014 - Data bus diagnostic interface - Dash panel insert



Wiring Diagram SEAT LEON 2014 - Data bus diagnostic interface - Dash panel insertUnlock Lifetime Access for This Car.
G1 Fuel gauge
G3 Coolant temperature gauge
G5 Rev. counter
G21 Speedometer
J285 Control unit in dash panel insert
J533 Data bus diagnostic interface
KX2 Dash panel insert
K16 Reserve fuel warning lamp
K83 Exhaust emissions warning lamp
K149 Engine electronics warning lamp
T18a 18-pin connector
T20a 20-pin connector
  B397 Connection 1 (convenience CAN bus, high), in main wiring harness
  B406 Connection 1 (convenience CAN bus, low), in main wiring harness


SEAT LEON 2014 Control units overview (3, 5-doors and ST vehicle)

Control units overview (3, 5-doors and ST vehicle)
SEAT LEON 2014 Control units overview (3, 5-doors and ST vehicle)Unlock Lifetime Access for This Car.
2 -  Mechatronic unit for dual clutch gearbox -J743-
q   Location: on gearbox
q   Fitting location and pin connectors:
q   Fitting location and pin connectors for engine codes CJSA and CJXA (196-pin)
8 -  Radiator fan control unit -J293-
q   Location: on the cooler



SEAT LEON 2014 Battery monitor control unit​ J367

Battery monitor control unit​ -J367-
Location:
on the battery.
   
SEAT LEON 2014 Battery monitor control unit​ J367Unlock Lifetime Access for This Car.
A -  2-pin connector -T2u-
Back to overview



SEAT LEON 2014 ABS control unit J104

ABS control unit -J104-
Location:
in engine compartment.
   
SEAT LEON 2014 ABS control unit J104Unlock Lifetime Access for This Car.
A -  ABS control unit -J104-
A1 -  38-pin connector -T38a-
  Note
According to equipment
Back to overview



SEAT LEON 2014 ABS control unit J104

ABS control unit -J104-
Location:
in engine compartment.
   
SEAT LEON 2014 ABS control unit J104Unlock Lifetime Access for This Car.
A -  ABS control unit -J104-
A1 -  46-pin connector -T46a-
  Note
According to equipment
Back to overview



SEAT LEON 2014

Engine control unit -J623- CHPA, CJZA, CJZB, CKFB, CKFC, CLHA, CLHB, CMBA, CRBC, CRKB, CRLB, CRMB, CRVA, CRVC, CUNA, CUPA and CXSA (154-pin)
Location:
in engine compartment, between battery and electronics box
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Engine control unit -J623-
A1 -  94-pin connector -T94a-
A2 -  60-pin connector -T60a-
Back to overview



SEAT LEON 2014

Engine control unit -J623- CJSA and CJXA (196-pin)
Location:
in engine compartment, between battery and electronics box
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Engine control unit -J623-
A1 -  91-pin connector -T91a-
A2 -  105-pin connector -T105a-
Back to overview



SEAT LEON 2014 Power steering control unit J500

Power steering control unit -J500-
Location:
near the steering box.
   
SEAT LEON 2014 Power steering control unit J500Unlock Lifetime Access for This Car.
A -  Power steering control unit -J500-
A1 -  3-pin connector -T3c-
A2 -  2-pin connector -T2b-
A3 -  5-pin connector -T5a-
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SEAT LEON 2014 Adaptive cruise control unit J428

Adaptive cruise control unit -J428-
Location:
near front bumper.
   
SEAT LEON 2014 Adaptive cruise control unit J428Unlock Lifetime Access for This Car.
A -  Adaptive cruise control unit -J428-
A1 -  8-pin connector -T8r-
Back to overview

   


Overview of fuses (3, 5-doors and ST vehicle)
q   Location, only right-hand drive models
q   Position of fuses, from September 2012:
q   Position of fuses, from June 2013:
q   Position of fuses, from November 2013:
q   Position of fuses, from September 2012:
q   Position of fuses, from June 2013:
q   Position of fuses, from September 2012:

Fuse holder A -SA-
Location:
On electronics box, on left in engine compartment
   
SEAT LEON 2014 Overview of fuses (3, 5-doors and ST vehicle)Unlock Lifetime Access for This Car.
SA -  Fuse holder A
SA1 -  Fuse 1 in fuse holder A ,
SA2 -  Fuse 2 in fuse holder A ,
SA3 -  Fuse 3 in fuse holder A ,
SA4 -  Fuse 4 in fuse holder A ,
SA5 -  Fuse 5 in fuse holder A ,
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SEAT LEON 2014

Fuses on fuse holder A -SA- , from September 2012
No.   Current Flow Diagram designation Nominal value   Function/component Terminal
J1A - Fuse 1 in fuse holder A -SA1- 125 A - Voltage supply of fuses:
-SC4- a -SC14- , -SC31- , -SC38- , -SC39- , -SC41- , -SC42- , -SC53-
Terminal 15 voltage supply relay -J329-
Relay for power sockets -J807-
Heated rear window relay -J9-		 30
G1A - Fuse 2 in fuse holder A -SA2- 400 A - Alternator -C-
 30
E1A - Fuse 3 in fuse holder A -SA3- 80 A - Power steering control unit -J500- 30
K2A - Fuse 4 in fuse holder A -SA4- 80 A - Voltage supply of fuses:
-SC3- , -SC15- a -SC21- , -SC23- a -SC28- ,-SC43- a -SC45-
Trailer voltage supply relay -J941-		 30
L1A - Fuse 5 in fuse holder A -SA5- 50 A   Radiator fan control unit -J293- 30

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SEAT LEON 2014 Fuse holder B SB

Fuse holder B -SB-
Location:
On electronics box, on left in engine compartment
   
SEAT LEON 2014 Fuse holder B SBUnlock Lifetime Access for This Car.
A -  Fuse holder B -SB- ;
Fuse colours:
t  50 A - red
t  40 A - orange or green
t  30 A - light green
t  25 A - colourless (white)
t  20 A - yellow or blue
t  15 A - light blue
t  10 A - red
t  7.5 A - brown
t  5 A - light brown
t  3 A - purple
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SEAT LEON 2014

Fuses on fuse holder B -SB- , from September 2012
No.   Current Flow Diagram designation Nominal value   Function/component Terminal
F1 - vacant - -   -
F2 - Fuse 2 on fuse holder B -SB2- 40 A - ABS control unit -J104- 30
F3 - Fuse 3 on fuse holder B -SB3- 15 A - Engine control unit -J623-
Only models with petrol engine		 87
F3 - Fuse 3 on fuse holder B -SB3- 30 A - Engine control unit -J623-
Only models with diesel engine		 87
F4 - Fuse 4 on fuse holder B -SB4- 10 A - Oil level and oil temperature sender -G266-
Radiator fan control unit -J293-
Activated charcoal filter solenoid valve 1 -N80-
Inlet camshaft control valve 1 -N205-
Exhaust camshaft control valve 1 -N318-
Oil pressure warning lamp -N428-
Only models with engine code CHPA and CMBA		 87
F4 - Fuse 4 on fuse holder B -SB4- 5 A - Oil level and oil temperature sender -G266-
Radiator fan control unit -J293-
Low heat output relay -J359-
High heat output relay -J360-
Charge pressure control solenoid valve -N75-
Only models with diesel engine		 87
F4 - Fuse 4 on fuse holder B -SB4- 10 A - Oil level and oil temperature sender -G266-
Radiator fan control unit -J293-
Turbocharger air recirculation valve -N249-
Intake manifold flap valve -N316-
Valve for oil pressure control -N428-
Piston cooling jet control valve -N522-
Only models with engine code CJSA		 87
F4 - Fuse 4 on fuse holder B -SB4- 10 A - Oil level and oil temperature sender -G266-
Radiator fan control unit -J293-
Activated charcoal filter solenoid valve 1 -N80-
Camshaft control valve 1 -N205-
Only models with engine code CJZA and CJZB		 87
F5 - Fuse 5 on fuse holder B -SB5- 10 A - Fuel pressure regulating valve -N276-
Fuel metering valve -N290-
Only models with diesel engine		 87
F5 - Fuse 5 on fuse holder B -SB5- 10 A - Actuator 1 for camshaft adjustment -F366-
Actuator 2 for camshaft adjustment -F367-
Actuator 3 for camshaft adjustment -F368-
Actuator 4 for camshaft adjustment -F369-
Actuator 5 for camshaft adjustment -F370-
Actuator 6 for camshaft adjustment -F371-
Actuator 7 for camshaft adjustment -F372-
Actuator 8 for camshaft adjustment -F373-
Engine component current supply relay -J757-
Injector 2, cylinder 1 -N532-
Injector 2, cylinder 2 -N533-
Injector 2, cylinder 3 -N534-
Injector 2, cylinder 4 -N535-
Only models with engine code CJSA		 87
F6 - Fuse 6 on fuse holder B -SB6- 5 A - Brake pedal position sender -G100- 87
F7 - Fuse 7 on fuse holder B -SB7- 5 A - Coolant shut-off valve -N82-
Only models with engine code CJSA		 87
F7 - Fuse 7 on fuse holder B -SB7- 10 A - Fuel pressure regulating valve -N276-
Continued coolant circulation pump -V51-
Only models with engine code CHPA, CJZA, CJZB and CMBA		 87
F7 - Fuse 7 on fuse holder B -SB7- 10 A - Oil pressure warning lamp -N428-
Coolant valve for cylinder head -N489-
Charge air cooling pump -V188-
Heating assistant pump -V488-
Only models with diesel engine		 87
F8 - Fuse 8 on fuse holder B -SB8- 15 A - Lambda probe heater -Z19-
Lambda probe 1 heater after catalytic converter -Z29-
Only models with petrol engine		 87
F8 - Fuse 8 on fuse holder B -SB8- 15 A - Lambda probe heater -Z19-
Only models with diesel engine		 87
F9 - Fuse 9 on fuse holder B -SB9- 20 A - Ignition coil 1 with output stage -N70-
Ignition coil 2 with output stage -N127-
Ignition coil 3 with output stage -N291-
Ignition coil 4 with output stage -N292-
Only models with engine code CHPA, CJZA, CJZB and CMBA		 87
F9 - Fuse 9 on fuse holder B -SB9- 10 A - Activated charcoal filter solenoid valve 1 -N80-
Camshaft control valve 1 -N205-
Exhaust camshaft control valve 1 -N318-
Continued coolant circulation pump -V51-
Only models with engine code CJSA		 87
F9 - Fuse 9 on fuse holder B -SB9- 5 A - Air mass meter -G70-
Automatic glow period control unit -J179-
Intake manifold preheating heater element -N51-
Only models with diesel engine		 87
F10 - Fuse 10 on fuse holder B -SB10- 15 A - Fuel pump control unit -J538-
Only models with petrol engine		 87
F10 - Fuse 10 on fuse holder B -SB10- 20 A - Fuel pump control unit -J538-
Only models with diesel engine		 87
F11 - Fuse 11 on fuse holder B -SB11- 40 A - Auxiliary heater element -Z35- 87
F12 - Fuse 12 on fuse holder B -SB12- 40 A - Auxiliary heater element -Z35- 87
F13 - Fuse 13 on fuse holder B -SB13- 30 A - Mechatronic unit for dual clutch gearbox -J743-
Only models with dual clutch gearbox 0CW		 30
F13 - Fuse 13 on fuse holder B -SB13- 15 A - Mechatronic unit for dual clutch gearbox -J743-
Only models with dual clutch gearbox 0D9		 30
F14 - vacant - -   -
F15 - Fuse 15 on fuse holder B -SB15- 15 A - Treble tone horn -H2-
Bass tone horn -H7-
Horn relay -J413-		 30
F16 - Fuse 16 on fuse holder B -SB16- 20 A - Ignition coil 1 with output stage -N70-
Ignition coil 2 with output stage -N127-
Ignition coil 3 with output stage -N291-
Ignition coil 4 with output stage -N292-
Only models with engine code CJSA		 87
F17 - Fuse 17 on fuse holder B -SB17- 7.5 A - Main relay -J271-
Terminal 30 voltage supply relay -J317-
Engine control unit -J623-
ABS control unit -J104-		 30
F18 - Fuse 18 on fuse holder B -SB18- 5 A - Battery monitor control unit​ -J367-
Only models with stop/start system		 30
F18 - Fuse 18 on fuse holder B -SB18- 5 A - Data bus diagnostic interface -J533-
Only models with no start/stop system		 30
F19 - Fuse 19 on fuse holder B -SB19- 30 A - Wiper motor control unit -J400- 30
F20 - Fuse 20 on fuse holder B -SB20- 10 A - Alarm horn -H12- 30
F21 - Fuse 21 on fuse holder B -SB21- 20 A - ABS control unit -J104- 30
F22 - Fuse 22 on fuse holder B -SB22- 5 A - Engine control unit -J623- 50
F23 - Fuse 23 on fuse holder B -SB23- 30 A - Starter -B- 50
F24 - Fuse 24 on fuse holder B -SB24- 40 A - Auxiliary heater element -Z35- 87
F31 - vacant - -   -
F32 - vacant - -   -
F33 - vacant - -   -
F34 - vacant - -   -
F35 - vacant - -   -
F36 - vacant - -   -
F37 - vacant - -   -
F38 - vacant - -   -

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SEAT LEON 2014

Fuses on fuse holder B -SB- , from June 2013
No.   Current Flow Diagram designation Nominal value   Function/component Terminal
F1 - Fuse 1 on fuse holder B -SB1- 20 A - ABS control unit -J104- According to equipment 30
F1 - Fuse 1 on fuse holder B -SB1- 40 A - ABS control unit -J104- According to equipment 30
F2 - Fuse 2 on fuse holder B -SB2- 40 A - ABS control unit -J104- 30
F3 - Fuse 3 on fuse holder B -SB3- 15 A - Engine control unit -J623-
Only models with petrol engine		 87
F3 - Fuse 3 on fuse holder B -SB3- 30 A - Engine control unit -J623-
Only models with diesel engine		 87
F4 - Fuse 4 on fuse holder B -SB4- 10 A - Oil level and oil temperature sender -G266-
Radiator fan control unit -J293-
Activated charcoal filter solenoid valve 1 -N80-
Inlet camshaft control valve 1 -N205-
Exhaust camshaft control valve 1 -N318-
Oil pressure warning lamp -N428-
Only models with engine code CHPA, CMBA und CXSA		 87
F4 - Fuse 4 on fuse holder B -SB4- 5 A - Oil level and oil temperature sender -G266-
Radiator fan control unit -J293-
Low heat output relay -J359-
High heat output relay -J360-
Charge pressure control solenoid valve -N75-
Only models with diesel engine		 87
F4 - Fuse 4 on fuse holder B -SB4- 10 A - Oil level and oil temperature sender -G266-
Radiator fan control unit -J293-
Turbocharger air recirculation valve -N249-
Intake manifold flap valve -N316-
Valve for oil pressure control -N428-
Piston cooling jet control valve -N522-
Only models with engine code CJSA		 87
F4 - Fuse 4 on fuse holder B -SB4- 10 A - Oil level and oil temperature sender -G266-
Radiator fan control unit -J293-
Activated charcoal filter solenoid valve 1 -N80-
Camshaft control valve 1 -N205-
Only models with engine code CJZA and CJZB		 87
F5 - Fuse 5 on fuse holder B -SB5- 10 A - Fuel pressure regulating valve -N276-
Fuel metering valve -N290-
Only models with diesel engine		 87
F5 - Fuse 5 on fuse holder B -SB5- 10 A   Camshaft control valve 1 -N205-
Fuel pressure regulating valve -N276-
Fuel metering valve -N290-
Only models with diesel engine EU6+		 87
F5 - Fuse 5 on fuse holder B -SB5- 10 A - Actuator 1 for camshaft adjustment -F366-
Actuator 2 for camshaft adjustment -F367-
Actuator 3 for camshaft adjustment -F368-
Actuator 4 for camshaft adjustment -F369-
Actuator 5 for camshaft adjustment -F370-
Actuator 6 for camshaft adjustment -F371-
Actuator 7 for camshaft adjustment -F372-
Actuator 8 for camshaft adjustment -F373-
Engine component current supply relay -J757-
Injector 2, cylinder 1 -N532-
Injector 2, cylinder 2 -N533-
Injector 2, cylinder 3 -N534-
Injector 2, cylinder 4 -N535-
Only models with engine code CJSA		 87
F6 - Fuse 6 on fuse holder B -SB6- 5 A - Brake pedal position sender -G100- 87
F7 - Fuse 7 on fuse holder B -SB7- 5 A - Coolant shut-off valve -N82-
Only models with engine code CJSA		 87
F7 - Fuse 7 on fuse holder B -SB7- 10 A - Fuel pressure regulating valve -N276-
Continued coolant circulation pump -V51-
Only models with engine code CHPA, CJZA, CJZB, CMBA and CXSA		 87
F7 - Fuse 7 on fuse holder B -SB7- 10 A - Oil pressure warning lamp -N428-
Coolant valve for cylinder head -N489-
Charge air cooling pump -V188-
Heating assistant pump -V488-
Only models with diesel engine		 87
F8 - Fuse 8 on fuse holder B -SB8- 15 A - Lambda probe heater -Z19-
Lambda probe 1 heater after catalytic converter -Z29-
Only models with petrol engine and diesel engine EU6+		 87
F8 - Fuse 8 on fuse holder B -SB8- 15 A - Lambda probe heater -Z19-
Only models with diesel engine EU5+		 87
F9 - Fuse 9 on fuse holder B -SB9- 20 A - Ignition coil 1 with output stage -N70-
Ignition coil 2 with output stage -N127-
Ignition coil 3 with output stage -N291-
Ignition coil 4 with output stage -N292-
Only models with engine code CHPA, CJZA, CJZB, CMBA and CXSA		 87
F9 - Fuse 9 on fuse holder B -SB9- 10 A - Activated charcoal filter solenoid valve 1 -N80-
Camshaft control valve 1 -N205-
Exhaust camshaft control valve 1 -N318-
Continued coolant circulation pump -V51-
Only models with engine code CJSA		 87
F9 - Fuse 9 on fuse holder B -SB9- 5 A - Air mass meter -G70-
Automatic glow period control unit -J179-
Intake manifold preheating heater element -N51-
Only models with diesel engine		 87
F10 - Fuse 10 on fuse holder B -SB10- 15 A - Fuel pump control unit -J538-
Only models with petrol engine		 87
F10 - Fuse 10 on fuse holder B -SB10- 20 A - Fuel pump control unit -J538-
Only models with diesel engine		 87
F11 - Fuse 11 on fuse holder B -SB11- 40 A - Auxiliary heater element -Z35- 87
F12 - Fuse 12 on fuse holder B -SB12- 40 A - Auxiliary heater element -Z35- 87
F13 - Fuse 13 on fuse holder B -SB13- 30 A - Mechatronic unit for dual clutch gearbox -J743-
Only models with dual clutch gearbox 0CW		 30
F13 - Fuse 13 on fuse holder B -SB13- 15 A - Mechatronic unit for dual clutch gearbox -J743-
Only models with dual clutch gearbox 0D9		 30
F14 - vacant - -   -
F15 - Fuse 15 on fuse holder B -SB15- 15 A - Treble tone horn -H2-
Bass tone horn -H7-
Horn relay -J413-		 30
F16 - Fuse 16 on fuse holder B -SB16- 20 A - Ignition coil 1 with output stage -N70-
Ignition coil 2 with output stage -N127-
Ignition coil 3 with output stage -N291-
Ignition coil 4 with output stage -N292-
Only models with engine code CJSA		 87
F17 - Fuse 17 on fuse holder B -SB17- 7.5 A - Main relay -J271-
Terminal 30 voltage supply relay -J317-
Engine control unit -J623-
ABS control unit -J104-		 30
F18 - Fuse 18 on fuse holder B -SB18- 5 A - Battery monitor control unit​ -J367-
Only models with stop/start system		 30
F18 - Fuse 18 on fuse holder B -SB18- 5 A - Data bus diagnostic interface -J533-
Only models with no start/stop system		 30
F19 - Fuse 19 on fuse holder B -SB19- 30 A - Wiper motor control unit -J400- 30
F20 - Fuse 20 on fuse holder B -SB20- 10 A - Alarm horn -H12- 30
F21 - vacant - -    
F22 - Fuse 22 on fuse holder B -SB22- 5 A - Engine control unit -J623- 50
F23 - Fuse 23 on fuse holder B -SB23- 30 A - Starter -B- 50
F24 - Fuse 24 on fuse holder B -SB24- 40 A - Auxiliary heater element -Z35- 87
F31 - vacant - -   -
F32 - vacant - -   -
F33 - vacant - -   -
F34 - vacant - -   -
F35 - vacant - -   -
F36 - vacant - -   -
F37 - vacant - -   -
F38 - vacant - -   -

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SEAT LEON 2014 Fuse holder C SC

Fuse holder C -SC-
Location, only left-hand drive models:
on left under dash panel
   
SEAT LEON 2014 Fuse holder C SCUnlock Lifetime Access for This Car.
A -  Fuse holder C -SC- ;
Fuse colours:
t  50 A - red
t  40 A - orange
t  30 A - light green
t  25 A - colourless (white)
t  20 A - yellow
t  15 A - light blue
t  10 A - red
t  7.5 A - brown
t  5 A - light brown
t  3 A - purple
t  1 A - black
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SEAT LEON 2014 Fuse holder C SC

Fuse holder C -SC-
Location, only right-hand drive models:
on left under dash panel
   
SEAT LEON 2014 Fuse holder C SCUnlock Lifetime Access for This Car.
A -  Fuse holder C -SC- ;
Fuse colours:
t  50 A - red
t  40 A - orange
t  30 A - light green
t  25 A - colourless (white)
t  20 A - yellow
t  15 A - light blue
t  10 A - red
t  7.5 A - brown
t  5 A - light brown
t  3 A - purple
t  1 A - black
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SEAT LEON 2014

Fuses on fuse holder C -SC- , from September 2012
No.   Current Flow Diagram designation Nominal value   Function/component Terminal
F1 - vacant - -   -
F2 - vacant - -   -
F3 - vacant - - -
F4 - Fuse 4 on fuse holder C -SC4- 10 A - Onboard supply control unit -J519-
t  Anti-theft alarm system
30
F5 - Fuse 5 on fuse holder C -SC5- 5 A - Data bus diagnostic interface -J533- 30
F6 - Fuse 6 on fuse holder C -SC6- 5 A - Interior monitoring sensor -G273-
Vehicle inclination sender -G384-		 30
F7 - Fuse 7 on fuse holder C -SC7- 10 A - Heated rear window relay -J9-
Heater control unit -J65-
Climatronic control unit -J255-
Air conditioning system control unit​ -J301-
 30
F8 - Fuse 8 on fuse holder C -SC8- 10 A - Light switch -E1-
Rain sensor -G213-
Air humidity sensor -G355-
Diagnosis connection -U31-		 30
F9 - vacant - -   -
F10 - Fuse 10 on fuse holder C -SC10- 10 A - Display unit of control unit for front display and information control panel -J685- 30
F11 - vacant - -   -
F12 - Fuse 12 on fuse holder C -SC12- 20 A - Control unit 1 for information electronics -J794-
Radio -R-		 30
F13 - vacant - -   -
F14 - Fuse 14 on fuse holder C -SC14- 40 A - Fresh air blower control unit -J126- 30
F15 - vacant - -   -
F16 - vacant - -   -
F17 - Fuse 17 on fuse holder C -SC17- 5 A - Control unit in dash panel insert -J285- 30
F18 - vacant - -   -
F19 - vacant - - -
F20 - vacant - -   -
F21 - vacant - -   -
F22 - vacant - - -
F23 - Fuse 23 on fuse holder C -SC23- 40 A - Onboard supply control unit -J519-
t  Right​ headlight -MX2-
30
F24 - Fuse 24 on fuse holder C -SC24- 30 A - Sliding sunroof adjustment control unit -J245- 30
F25 - Fuse 25 on fuse holder C -SC25- 30 A - Driver door control unit -J386-
Rear driver side window regulator motor -V471-		 30
F26 - Fuse 26 on fuse holder C -SC26- 20 A - Onboard supply control unit -J519-
t  Front heated seats
30
F27 - vacant - -   -
F28 - vacant - -   -
F29 - vacant - -   -
F30 - vacant - -   -
F31 - Fuse 31 on fuse holder C -SC31- 40 A - Onboard supply control unit -J519-
t  Left headlight -MX1-
30
F32 - Fuse 32 on fuse holder C -SC32- 7.5 A - Park assist steering control unit -J446- 15
F33 - Fuse 33 on fuse holder C -SC33- 5 A - Airbag control unit -J234-
Front passenger side airbag deactivated warning lamp -K145-		 15
F34 - Fuse 34 on fuse holder C -SC34- 7.5 A - Light switch -E1-
Fog light switch -E7-
Rear fog light switch -E18-
Interior mirror -EX5-
Tyre pressure monitor button -E226-
Reversing light switch -F4-
Air quality sensor -G238-
Humidity sender in fresh air intake duct -G657-
Pressure sender for refrigerant circuit -G805-
Relay for power sockets -J807-
Control unit for structure-borne sound -J869-
Automatic anti-dazzle interior mirror -Y7-		 15
F35 - Fuse 35 on fuse holder C -SC35- 10 A - Headlight range control regulator -E102-
Headlight range control unit -J431-
Diagnosis connection -U31-
Left headlight range control motor -V48-
Right headlight range control motor -V49-		 15
F36 - Fuse 36 on fuse holder C -SC36- 10 A - Lane departure warning control unit -J759-
Front camera for driver assist systems -R242-		 15
F37 - vacant - -   -
F38 - vacant - -   -
F39 - Fuse 39 on fuse holder C -SC39- 30 A - Front passenger door control unit -J387-
Rear passenger side window regulator motor -V472-		 30
F40 - Fuse 40 on fuse holder C -SC40- 20 A - 12 V socket -U5-
 87
F41 - Fuse 41 on fuse holder C -SC41- 1 A - Steering column electronics control unit -J527- 30
F42 - Fuse 42 on fuse holder C -SC42- 40 A - Onboard supply control unit -J519-
t  Central locking
30
F43 - Fuse 43 on fuse holder C -SC43- 30 A - Onboard supply control unit -J519- 30
F44 - vacant - -   -
F45 - vacant - -   -
F46 - vacant - -   -
F47 - Fuse 47 on fuse holder C -SC47- 15 A - Rear window wiper motor -V12- 15
F48 - vacant - - -
F49 - Fuse 49 on fuse holder C -SC49- 5 A - Clutch position sender -G476-
Starter motor relay 1 -J906-
Starter motor relay 2 -J907-		 15
F50 - vacant - -   -
F51 - vacant - -   -
F52 - vacant - - -
F53 - Fuse 53 on fuse holder C -SC53- 30 A - Window aerial suppression filter -C18-
Suppression filter -C24-
Heated rear window relay -J9-
Heated rear window -Z1-		 87

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SEAT LEON 2014

Fuses on fuse holder C -SC- , from June 2013
No.   Current Flow Diagram designation Nominal value   Function/component Terminal
F1 - vacant - -   -
F2 - vacant - -   -
F3 - vacant - - -
F4 - vacant - - -
F5 - Fuse 5 on fuse holder C -SC5- 5 A - Data bus diagnostic interface -J533- 30
F6 - Fuse 6 on fuse holder C -SC6- 5 A - Interior monitoring sensor -G273-
Vehicle inclination sender -G384-		 30
F7 - Fuse 7 on fuse holder C -SC7- 10 A - Heated rear window relay -J9-
Heater control unit -J65-
Climatronic control unit -J255-
Air conditioning system control unit​ -J301-
 30
F8 - Fuse 8 on fuse holder C -SC8- 10 A - Light switch -E1-
Rain sensor -G213-
Air humidity sensor -G355-
Diagnosis connection -U31-		 30
F9 - vacant - -   -
F10 - Fuse 10 on fuse holder C -SC10- 10 A - Display unit of control unit for front display and information control panel -J685- 30
F11 - vacant - -   -
F12 - Fuse 12 on fuse holder C -SC12- 20 A - Control unit 1 for information electronics -J794-
Radio -R-		 30
F13 - vacant - -   -
F14 - Fuse 14 on fuse holder C -SC14- 40 A - Fresh air blower control unit -J126- 30
F15 - vacant - -   -
F16 - vacant - -   -
F17 - Fuse 17 on fuse holder C -SC17- 5 A - Control unit in dash panel insert -J285- 30
F18 - vacant - -   -
F19 - vacant - - -
F20 - vacant - -   -
F21 - vacant - -   -
F22 - vacant - - -
F23 - Fuse 23 on fuse holder C -SC23- 40 A - Onboard supply control unit -J519-
t  Right​ headlight -MX2-
30
F24 - Fuse 24 on fuse holder C -SC24- 30 A - Sliding sunroof adjustment control unit -J245- (only 3 and 5-doors vehicle) 30
F24 - Fuse 24 on fuse holder C -SC24- 30 A - Sliding sunroof adjustment control unit -J245-
Sunroof roller blind control unit -J394-
(only ST vehicle)		 30
F25 - Fuse 25 on fuse holder C -SC25- 30 A - Driver door control unit -J386-
Rear driver side window regulator motor -V471-		 30
F26 - Fuse 26 on fuse holder C -SC26- 20 A - Onboard supply control unit -J519-
t  Front heated seats
30
F27 - vacant - -   -
F28 - Fuse 28 on fuse holder C -SC28- 20 A - Trailer detector control unit -J345- 30
F29 - vacant - -   -
F30 - vacant - -   -
F31 - Fuse 31 on fuse holder C -SC31- 40 A - Onboard supply control unit -J519-
t  Left headlight -MX1-
30
F32 - Fuse 32 on fuse holder C -SC32- 7.5 A - Park assist steering control unit -J446- 15
F33 - Fuse 33 on fuse holder C -SC33- 5 A - Airbag control unit -J234-
Front passenger side airbag deactivated warning lamp -K145-		 15
F34 - Fuse 34 on fuse holder C -SC34- 7.5 A - Light switch -E1-
Fog light switch -E7-
Rear fog light switch -E18-
Interior mirror -EX5-
Tyre pressure monitor button -E226-
Reversing light switch -F4-
Air quality sensor -G238-
Humidity sender in fresh air intake duct -G657-
Pressure sender for refrigerant circuit -G805-
Relay for power sockets -J807-
Control unit for structure-borne sound -J869-
Automatic anti-dazzle interior mirror -Y7-		 15
F35 - Fuse 35 on fuse holder C -SC35- 10 A - Headlight range control regulator -E102-
Headlight range control unit -J431-
Diagnosis connection -U31-
Left headlight range control motor -V48-
Right headlight range control motor -V49-		 15
F36 - Fuse 36 on fuse holder C -SC36- 10 A - Lane departure warning control unit -J759-
Front camera for driver assist systems -R242-		 15
F37 - vacant - -   -
F38 - Fuse 38 on fuse holder C -SC38- 20 A - Trailer detector control unit -J345- 30
F39 - Fuse 39 on fuse holder C -SC39- 30 A - Front passenger door control unit -J387-
Rear passenger side window regulator motor -V472-		 30
F40 - Fuse 40 on fuse holder C -SC40- 20 A - 12 V socket -U5-
(only 3 and 5-doors vehicle) 		87
F40 - Fuse 40 on fuse holder C -SC40- 20 A - 12 V socket -U5-
12 V socket 2 -U18-
(only ST vehicle) 		87
F41 - Fuse 41 on fuse holder C -SC41- 1 A - Steering column electronics control unit -J527- 30
F42 - Fuse 42 on fuse holder C -SC42- 40 A - Onboard supply control unit -J519-
t  Central locking
30
F43 - Fuse 43 on fuse holder C -SC43- 30 A - Onboard supply control unit -J519- 30
F44 - Fuse 44 on fuse holder C -SC44- 15 A - Trailer detector control unit -J345- 30
F45 - vacant - -   -
F46 - vacant - -   -
F47 - Fuse 47 on fuse holder C -SC47- 15 A - Rear window wiper motor -V12- 15
F48 - Fuse 48 on fuse holder C -SC48- 15 A - Trailer socket -U10- (only 3 and 5-doors vehicle) 15
F48 - Fuse 48 on fuse holder C -SC48- 30 A - Trailer socket -U10- (only ST vehicle) 15
F49 - Fuse 49 on fuse holder C -SC49- 5 A - Clutch position sender -G476-
Starter motor relay 1 -J906-
Starter motor relay 2 -J907-		 15
F50 - vacant - -   -
F51 - vacant - -   -
F52 - vacant - - -
F53 - Fuse 53 on fuse holder C -SC53- 30 A - Window aerial suppression filter -C18-
Suppression filter -C24-
Heated rear window relay -J9-
Heated rear window -Z1-		 87

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SEAT LEON 2014

Fuses on fuse holder C -SC- , from November 2013
No.   Current Flow Diagram designation Nominal value   Function/component Terminal
F1 - vacant - -   -
F2 - vacant - -   -
F3 - vacant - - -
F4 - vacant - - -
F5 - Fuse 5 on fuse holder C -SC5- 5 A - Data bus diagnostic interface -J533- 30
F6 - Fuse 6 on fuse holder C -SC6- 5 A - Interior monitoring sensor -G273-
Vehicle inclination sender -G384-		 30
F7 - Fuse 7 on fuse holder C -SC7- 10 A - Heated rear window relay -J9-
Heater control unit -J65-
Climatronic control unit -J255-
Air conditioning system control unit​ -J301-
 30
F8 - Fuse 8 on fuse holder C -SC8- 10 A - Light switch -E1-
Rain sensor -G213-
Air humidity sensor -G355-
Diagnosis connection -U31-		 30
F9 - vacant - -   -
F10 - Fuse 10 on fuse holder C -SC10- 10 A - Display unit of control unit for front display and information control panel -J685- 30
F11 - vacant - -   -
F12 - Fuse 12 on fuse holder C -SC12- 20 A - Control unit 1 for information electronics -J794-
Radio -R-		 30
F13 - Fuse 13 on fuse holder C -SC13- 15 A - Electronically controlled damping control unit -J250- 30
F14 - Fuse 14 on fuse holder C -SC14- 30 A - Fresh air blower control unit -J126- 30
F15 - vacant - -   -
F16 - vacant - -   -
F17 - Fuse 17 on fuse holder C -SC17- 5 A - Control unit in dash panel insert -J285- 30
F18 - vacant - -   -
F19 - vacant - - -
F20 - vacant - -   -
F21 - Fuse 21 on fuse holder C -SC21- 15 A - All-wheel drive control unit -J492- 30
F22 - vacant - - -
F23 - Fuse 23 on fuse holder C -SC23- 40 A - Onboard supply control unit -J519-
t  Right​ headlight -MX2-
30
F24 - Fuse 24 on fuse holder C -SC24- 30 A - Sliding sunroof adjustment control unit -J245- (only 3 and 5-doors vehicle) 30
F24 - Fuse 24 on fuse holder C -SC24- 30 A - Sliding sunroof adjustment control unit -J245-
Sunroof roller blind control unit -J394-
(only ST vehicle)		 30
F25 - Fuse 25 on fuse holder C -SC25- 30 A - Driver door control unit -J386-
Rear driver side window regulator motor -V471-		 30
F26 - Fuse 26 on fuse holder C -SC26- 20 A - Onboard supply control unit -J519-
t  Front heated seats
30
F27 - Fuse 27 on fuse holder C -SC27- 20 A - Trailer voltage supply relay -J941-
Trailer socket -U10-		 30
F28 - Fuse 28 on fuse holder C -SC28- 20 A - Trailer detector control unit -J345- 30
F29 - vacant - -   -
F30 - vacant - -   -
F31 - Fuse 31 on fuse holder C -SC31- 40 A - Onboard supply control unit -J519-
t  Left headlight -MX1-
30
F32 - Fuse 32 on fuse holder C -SC32- 7.5 A - Park assist steering control unit -J446- 15
F33 - Fuse 33 on fuse holder C -SC33- 5 A - Airbag control unit -J234-
Front passenger side airbag deactivated warning lamp -K145-		 15
F34 - Fuse 34 on fuse holder C -SC34- 7.5 A - Light switch -E1-
Fog light switch -E7-
Rear fog light switch -E18-
Interior mirror -EX5-
Tyre pressure monitor button -E226-
Reversing light switch -F4-
Air quality sensor -G238-
Humidity sender in fresh air intake duct -G657-
Pressure sender for refrigerant circuit -G805-
Relay for power sockets -J807-
Control unit for structure-borne sound -J869-
Automatic anti-dazzle interior mirror -Y7-		 15
F35 - Fuse 35 on fuse holder C -SC35- 10 A - Headlight range control regulator -E102-
Headlight range control unit -J431-
Diagnosis connection -U31-
Left headlight range control motor -V48-
Right headlight range control motor -V49-		 15
F36 - Fuse 36 on fuse holder C -SC36- 10 A - Lane departure warning control unit -J759-
Front camera for driver assist systems -R242-		 15
F37 - vacant - -   -
F38 - Fuse 38 on fuse holder C -SC38- 20 A - Trailer detector control unit -J345- 30
F39 - Fuse 39 on fuse holder C -SC39- 30 A - Front passenger door control unit -J387-
Rear passenger side window regulator motor -V472-		 30
F40 - Fuse 40 on fuse holder C -SC40- 20 A - 12 V socket -U5-
(only 3 and 5-doors vehicle) 		87
F40 - Fuse 40 on fuse holder C -SC40- 20 A - 12 V socket -U5-
12 V socket 2 -U18-
(only ST vehicle) 		87
F41 - Fuse 41 on fuse holder C -SC41- 1 A - Steering column electronics control unit -J527- 30
F42 - Fuse 42 on fuse holder C -SC42- 40 A - Onboard supply control unit -J519-
t  Central locking
30
F43 - Fuse 43 on fuse holder C -SC43- 30 A - Onboard supply control unit -J519- 30
F44 - Fuse 44 on fuse holder C -SC44- 15 A - Trailer detector control unit -J345- 30
F45 - vacant - -   -
F46 - vacant - -   -
F47 - Fuse 47 on fuse holder C -SC47- 15 A - Rear window wiper motor -V12- 15
F48 - vacant - -   -
F48 - vacant - -   -
F49 - Fuse 49 on fuse holder C -SC49- 5 A - Clutch position sender -G476-
Starter motor relay 1 -J906-
Starter motor relay 2 -J907-		 15
F50 - vacant - -   -
F51 - vacant - -   -
F52 - vacant - - -
F53 - Fuse 53 on fuse holder C -SC53- 30 A - Window aerial suppression filter -C18-
Suppression filter -C24-
Heated rear window relay -J9-
Heated rear window -Z1-		 87

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SEAT LEON 2014 Earth points overview (3, 5-doors and ST vehicle)

Earth points overview (3, 5-doors and ST vehicle)
SEAT LEON 2014 Earth points overview (3, 5-doors and ST vehicle)Unlock Lifetime Access for This Car.
   656 Earth points on right headlight
q   Location
   685 Earth point 1 at front of right longitudinal member
q   Location
   751 Earth point 2, on right A-pillar
q   Location
   638 Earth point, on right A-pillar
q   Location
   687 Earth point 1, on centre tunnel
q   Location
   75 Earth point, rear right pillar
q   Location
   666 Earth point, on rear right of roof
q   Location
   612 Earth point, in centre of rear lid
q   Location
   57 Earth point, rear left pillar
q   Location
   667 Earth point, on rear left of roof
q   Location
   690 Earth point, rear centre roof frame
q   Location
   639 Earth point, left A-pillar
q   Location
   12 Earth point, on left in engine compartment
q   Location
   671 Earth point 1, on front of left longitudinal member
q   Location
   672 Earth point 2, on front of left longitudinal member
q   Location
   673 Earth point 3, on front of left longitudinal member
q   Location
   652 Earth point, engine and gearbox earth
q   Location




   638 Earth point on right A-pillar -arrow B-
Tightening torque:
9 Nm
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   687 Earth point 1, on centre tunnel -arrow-
Tightening torque:
9 Nm
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   75 Earth point, rear right pillar -arrow-
Tightening torque:
9 Nm
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   667 Earth point, on rear left of roof -arrow C-
Tightening torque:
9 Nm
   690 Earth point, rear centre roof frame -arrow B-
Tightening torque:
9 Nm
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   612 Earth point, in centre of rear lid -arrow-
Tightening torque:
2 Nm
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   57 Earth point, rear left pillar -arrow-
Tightening torque:
9 Nm
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   639 Earth point, left A-pillar -arrow-
Tightening torque:
9 Nm
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   12 Earth point, on left in engine compartment -arrow-
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   672 Earth point 2, on front of left longitudinal member -arrow A-
Tightening torque:
9 Nm
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   673 Earth point 3, on front of left longitudinal member -arrow-
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   652 Earth point, engine and gearbox earth -arrow-
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Overview of relay (3, 5-doors and ST vehicle)
1 - 
q   Position of relays, only right-hand drive models:
q  
2 -  Relay carrier on electronics box
q   on left in engine compartment
q   Components: -J179- , -J271- , -J317- , -J359- , -J360- , -J413- , -J757- , -J906- , -J907-
q   Position of relays:

   
Relay assignment on E-box
SEAT LEON 2014 Overview of relay (3, 5-doors and ST vehicle)Unlock Lifetime Access for This Car.
1 -  Automatic glow period control unit -J179-
q   Position A6
q   Only models with diesel engine
2 -  Low heat output relay -J359-
q   Position A7
3 -  vacant
q   Position A10
4 -  Starter motor relay 2 -J907-
q   Position A2
5 -  Starter motor relay 1 -J906-
q   Position A1
6 -  Horn relay -J413-
q   Position A3
7 -  High heat output relay -J360-
q   Position A4
8 -  Main relay -J271-
q   Position A5
q   Only models with petrol engine
8 -  Terminal 30 voltage supply relay -J317-
q   Position A5
q   Only models with diesel engine
9 -  Engine component current supply relay -J757-
q   Position A8
q   Engine code CJSA
10 -  vacant
q   Position A9
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SEAT LEON 2014 Position of relays under dash panel, only left-hand drive models

Position of relays under dash panel, only left-hand drive models
SEAT LEON 2014 Position of relays under dash panel, only left-hand drive modelsUnlock Lifetime Access for This Car.
1 -  Trailer voltage supply relay -J941-
q   Position B1
2 -  vacant
q   Position B2
3 -  vacant
q   Position B3
4 -  Relay for power sockets -J807-
q   Position B6
5 -  Heated rear window relay -J9-
q   Position B5
6 -  Terminal 15 voltage supply relay -J329-
q   Position B4
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SEAT LEON 2014

Position of relays under dash panel, only right-hand drive models
SEAT LEON 2014 Unlock Lifetime Access for This Car.
1 -  Trailer voltage supply relay -J941-
q   Position B1
2 -  vacant
q   Position B2
3 -  vacant
q   Position B3
4 -  Relay for power sockets -J807-
q   Position B6
5 -  Heated rear window relay -J9-
q   Position B5
6 -  Terminal 15 voltage supply relay -J329-
q   Position B4
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SEAT LEON 2014 Overview of coupling stations (3, 5-doors and ST vehicle)

Overview of coupling stations (3, 5-doors and ST vehicle)
SEAT LEON 2014 Overview of coupling stations (3, 5-doors and ST vehicle)Unlock Lifetime Access for This Car.
1 -  Coupling stations on engine wiring
q   Pin connectors: -T10q- , -T14a-
q   Location:
3 - 
6 -  Coupling station on rear lid, centre
q   Pin connectors: -T10h- , -T10j-
q   Location:
9 -  Coupling station on rear driver door
q   Only models with 5-doors
q   Pin connector: -T27c-
q   Location:
10 - 
12 -  Coupling station on left A-pillar
q   Pin connectors: -T17a- , -T17b- , -T17c- , -T17d-
q   Location:
13 -  Coupling station on alternator
q   Pin connectors: -T4w- , -T8s-
q   Location:



SEAT LEON 2014 Coupling station on engine wiring

Coupling station on engine wiring
Location:
front left in engine compartment.
   
SEAT LEON 2014 Coupling station on engine wiringUnlock Lifetime Access for This Car.
1 -  10-pin connector -T10q-
q   Only models with diesel engine
2 -  14-pin connector -T14a-
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SEAT LEON 2014 Coupling station on front passenger door

Coupling station on front passenger door
Location:
on front passenger side A-pillar.
   
SEAT LEON 2014 Coupling station on front passenger doorUnlock Lifetime Access for This Car.
A -  27-pin connector -T27b-
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SEAT LEON 2014 Coupling station on front passenger seat

Coupling station on front passenger seat
Location:
under front passenger seat.
   
SEAT LEON 2014 Coupling station on front passenger seatUnlock Lifetime Access for This Car.
1 -  10-pin connector -T10p-
2 -  3-pin connector -T3b-
3 -  4-pin connector -T4a-
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SEAT LEON 2014 Coupling station on roof wiring

Coupling station on roof wiring
Location:
Near the front roof module.
   
SEAT LEON 2014 Coupling station on roof wiringUnlock Lifetime Access for This Car.
1 -  6-pin connector -T6q-
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SEAT LEON 2014 Coupling station on rear passenger door

Coupling station on rear passenger door
Location:
on front passenger side B-pillar.
   
SEAT LEON 2014 Coupling station on rear passenger doorUnlock Lifetime Access for This Car.
A -  27-pin connector -T27d-
  Note
Only models with 5-doors
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SEAT LEON 2014 Coupling station on rear lid, centre

Coupling station on rear lid, centre
Location:
on the rear lid, centre.
   
SEAT LEON 2014 Coupling station on rear lid, centreUnlock Lifetime Access for This Car.
1 -  10-pin connector -T10h- black
2 -  10-pin connector -T10j- brown
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SEAT LEON 2014 Coupling station in rear bumper

Coupling station in rear bumper
Location:
in bumper.
   
SEAT LEON 2014 Coupling station in rear bumperUnlock Lifetime Access for This Car.
1 -  6-pin connector -T6l-
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SEAT LEON 2014 Coupling station on rear driver door

Coupling station on rear driver door
Location:
on driver side B-pillar.
   
SEAT LEON 2014 Coupling station on rear driver doorUnlock Lifetime Access for This Car.
1 -  27-pin connector -T27c-
  Note
Only models with 5-doors
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SEAT LEON 2014 Coupling station on driver seat

Coupling station on driver seat
Location:
under driver seat.
   
SEAT LEON 2014 Coupling station on driver seatUnlock Lifetime Access for This Car.
1 -  10-pin connector -T10n-
2 -  3-pin connector -T3a-
3 -  2-pin connector -T2a-
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SEAT LEON 2014 Coupling station on driver door

Coupling station on driver door
Location:
on driver side A-pillar.
   
SEAT LEON 2014 Coupling station on driver doorUnlock Lifetime Access for This Car.
A -  27-pin connector -T27a-
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SEAT LEON 2014 Coupling station on left A-pillar

Coupling station on left A-pillar
Location:
on left A-pillar.
   
SEAT LEON 2014 Coupling station on left A-pillarUnlock Lifetime Access for This Car.
1 -  17-pin connector -T17a- brown
2 -  17-pin connector -T17b- white
3 -  17-pin connector -T17c- red
4 -  17-pin connector -T17d- blue
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SEAT LEON 2014 Coupling station on alternator

Coupling station on alternator
Location:
front left in engine compartment.
   
SEAT LEON 2014 Coupling station on alternatorUnlock Lifetime Access for This Car.
1 -  4-pin connector -T4w-
q   Only models with engine code CHPA, CJZA, CJZB, CMBA and CXSA
1 -  8-pin connector -T8s-
q   Only models with engine code CJSA, CKFB, CKFC, CLHA, CLHB, CRMB, CRVA, CRVC, CUNA and CUPA
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SEAT LEON 2014 Coupling station for radiator fan

Coupling station for radiator fan
Location:
on left in engine compartment.
   
SEAT LEON 2014 Coupling station for radiator fanUnlock Lifetime Access for This Car.
1 -  4-pin connector -T4g-
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SEAT LEON 2014 Coupling station in front bumper

Coupling station in front bumper
Location:
in bumper.
   
SEAT LEON 2014 Coupling station in front bumperUnlock Lifetime Access for This Car.
1 -  8-pin connector -T8a-
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SEAT LEON 2014

Control units overview (3, 5-doors and ST vehicle)
SEAT LEON 2014 Unlock Lifetime Access for This Car.
q   Fitting location and pin connectors, (only ST vehicle):
q   Fitting location and pin connectors for diesel engines:



SEAT LEON 2014

Headlight range control unit -J431-
Location:
behind dash panel, left
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Headlight range control unit -J431-
A1 -  26-pin connector -T26a-
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SEAT LEON 2014

Data bus diagnostic interface -J533-
Location:
under the dash panel.
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Data bus diagnostic interface -J533-
A1 -  20-pin connector -T20a-
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SEAT LEON 2014

Front passenger door control unit -J387-
Location:
on the front passenger door.
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Front passenger door control unit -J387-
A1 -  6-pin connector -T6w-
A2 -  20-pin connector -T20d-
A3 -  16-pin connector -T16h-
A4 -  32-pin connector -T32b-
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SEAT LEON 2014

Air conditioning system control unit​ -J301-
Location:
on the dash panel - centre
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Air conditioning system control unit​ -J301-
A1 -  16-pin connector -T16b-
A2 -  20-pin connector -T20b-
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SEAT LEON 2014

Climatronic control unit -J255-
Location:
on the dash panel - centre
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Climatronic control unit -J255-
A1 -  16-pin connector -T16c-
A2 -  16-pin connector -T16d-
A3 -  20-pin connector -T20b-
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SEAT LEON 2014

Front camera for driver assist systems -R242-
Location:
near interior mirror
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Front camera for driver assist systems -R242-
A1 -  12-pin connector -T12i-
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SEAT LEON 2014

Sliding sunroof adjustment control unit -J245- (only 3 and 5-doors vehicle)
Location:
on rear sunroof motor
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Sliding sunroof adjustment control unit -J245-
A1 -  10-pin connector -T10i-
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SEAT LEON 2014

Sliding sunroof adjustment control unit -J245- (only ST vehicle)
Location:
on front sunroof motor
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Sliding sunroof adjustment control unit -J245-
A1 -  16-pin connector -T16j-
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SEAT LEON 2014

Electronically controlled damping control unit -J250-
Location:
behind left side trim in luggage compartment
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Electronically controlled damping control unit -J250-
A1 -  47-pin connector -T47a-
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SEAT LEON 2014

Trailer detector control unit -J345-
Location:
behind left side trim in luggage compartment
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Trailer detector control unit -J345-
A1 -  16-pin connector -T16i-
A2 -  12-pin connector -T12j-
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SEAT LEON 2014

All-wheel drive control unit -J492-
Location:
on differential
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  All-wheel drive control unit -J492-
A1 -  2-pin connector -T2ad-
A2 -  8-pin connector -T8w-
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SEAT LEON 2014

Fuel pump control unit -J538- (petrol engines)
Location:
under the back seat.
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Fuel pump control unit -J538-
A1 -  5-pin connector -T5j-
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SEAT LEON 2014

Fuel pump control unit -J538- (diesel engines)
Location:
under the back seat.
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Fuel pump control unit -J538-
A1 -  6-pin connector -T6ab-
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SEAT LEON 2014

Driver door control unit -J386-
Location:
on the driver door.
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Driver door control unit -J386-
A1 -  6-pin connector -T6v-
A2 -  20-pin connector -T20c-
A3 -  16-pin connector -T16g-
A4 -  32-pin connector -T32a-
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SEAT LEON 2014

Steering column electronics control unit -J527-
Location:
on the steering column electronics.
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Steering column electronics control unit -J527-
A1 -  4-pin connector -T4c-
A2 -  16-pin connector -T16e-
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SEAT LEON 2014

Control unit in dash panel insert -J285-
Location:
on the dash panel.
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Control unit in dash panel insert -J285-
A1 -  18-pin connector -T18a-
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SEAT LEON 2014

Onboard supply control unit -J519-
Location:
behind dash panel, left
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Onboard supply control unit -J519-
A1 -  73-pin connector -T73a-
A2 -  46-pin connector -T46b-
A3 -  73-pin connector -T73c-
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SEAT LEON 2014

Park assist steering control unit -J446-
Location:
behind dash panel, left
   
SEAT LEON 2014 Unlock Lifetime Access for This Car.
A -  Park assist steering control unit -J446-
A1 -  26-pin connector -T26b-
A2 -  18-pin connector -T18b-
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SEAT LEON 2014 Airbag control unit J234

Airbag control unit -J234-
Location:
under centre console.
   
SEAT LEON 2014 Airbag control unit J234Unlock Lifetime Access for This Car.
A -  Airbag control unit -J234-
A1 -  90-pin connector -T90a-
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