Wiring Diagram SEAT LEON 2005 - Battery - starter - alternator - voltage regulator - ignition/starter switch - X-contact relief relay
A | Battery |
B | Starter |
C | Alternator |
C1 | Voltage regulator |
D | Ignition/starter switch |
J59 | X-contact relief relay |
T2k | 2-pin connector, on engine |
T4l | 4-pin connector, on engine |
T6l | 6-pin connector, brown, in connector protective housing, on left in plenum chamber |
500 | Screw connection 1 (30), on relay plate |
501 | Screw connection 2 (30), on relay plate |
502 | Screw connection 1 (30a), on relay plate |
A2 | Positive connection (15), in dash panel wiring harness |
A32 | Positive connection (30), in dash panel wiring harness |
* | only models with air conditioning system |
Wiring Diagram SEAT LEON 2005 - Motronic control unit - ignition coils with output stage - spark plug connector - spark plugs
J220 | Motronic control unit |
N70 | Ignition coil 1 with output stage |
N127 | Ignition coil 2 with output stage |
N291 | Ignition coil 3 with output stage |
N292 | Ignition coil 4 with output stage |
P | Spark plug connector |
Q | Spark plugs |
T6l | 6-pin connector, brown, in connector protective housing, on left in plenum chamber |
T14a | 14-pin connector, in left wiring harness |
16 | Earth point 1, on cylinder head |
85 | Earth connection 1, in engine compartment wiring harness |
281 | Earth connection 1, in engine wiring harness |
A104 | Positive connection 2 (15), in dash panel wiring harness |
D102 | Connection 2, in engine compartment wiring harness |
D111 | Connection 9, in engine compartment wiring harness |
Wiring Diagram SEAT LEON 2005 - Motronic control unit - exhaust camshaft control valve 1 - ignition coils with output stage - spark plug connector - spark plugs
J220 | Motronic control unit |
N318 | Exhaust camshaft control valve 1 |
N323 | Ignition coil 5 with output stage |
N324 | Ignition coil 6 with output stage |
P | Spark plug connector |
Q | Spark plugs |
T2nh | 2-pin connector |
85 | Earth connection 1, in engine compartment wiring harness |
281 | Earth connection 1, in engine wiring harness |
D52 | Positive connection (15a), in engine compartment wiring harness |
D102 | Connection 2, in engine compartment wiring harness |
Wiring Diagram SEAT LEON 2005 - Motronic control unit - throttle valve module - throttle valve drive angle sender 1 for electric throttle - oil level and oil temperature sender
G186 | Throttle valve drive (electric power control) |
G187 | Throttle valve drive angle sender 1 for electric throttle |
G188 | Throttle valve drive angle sender 2 for electric throttle |
G266 | Oil level and oil temperature sender |
J220 | Motronic control unit |
J271 | Motronic current supply relay |
J293 | Radiator fan control unit |
J338 | Throttle valve module |
V51 | Continued coolant circulation pump |
T14a | 14-pin connector, in left wiring harness |
10 | Earth point, in plenum chamber |
85 | Earth connection 1, in engine compartment wiring harness |
D75 | Positive connection 2 (30), in engine compartment wiring harness |
* | only models with extended servicing intervals |
Wiring Diagram SEAT LEON 2005 - Motronic control unit - knock sensor 1 - knock sensor 2 - accelerator position sender - accelerator position sender 2
G61 | Knock sensor 1 |
G66 | Knock sensor 2 |
G79 | Accelerator position sender |
G185 | Accelerator position sender 2 |
J220 | Motronic control unit |
T3e | 3-pin connector, near intake manifold |
T10h | 10-pin connector, blue, in connector protective housing, on left in plenum chamber |
139 | Earth connection (sender earth), in Motronic wiring harness |
220 | Earth connection (sender earth), in engine wiring harness |
241 | Earth connection 2 engine earth, in engine wiring harness |
Wiring Diagram SEAT LEON 2005 - Motronic control unit - coolant temperature sender - engine speed sender - Hall sender - Hall sender 2
G2 | Coolant temperature display sender |
G28 | Engine speed sender |
G40 | Hall sender |
G62 | Coolant temperature display sender |
G163 | Hall sender 2 |
J220 | Motronic control unit |
J255 | Climatronic control unit |
J293 | Radiator fan control unit |
T3b | 3-pin connector, on radiator fan |
T10 | 10-pin connector, orange, in connector protective housing, on left in plenum chamber |
T14a | 14-pin connector, in left wiring harness |
220 | Earth connection (sender earth), in engine wiring harness |
D106 | Connection 4, in engine compartment wiring harness |
Wiring Diagram SEAT LEON 2005 - Motronic control unit - injector - cylinder 1 - injector - cylinder 2 - injector - cylinder 3 - injector - cylinder 4 - injector - cylinder 5 - injector - cylinder 6
J220 | Motronic control unit |
N30 | Injector, cylinder 1 |
N31 | Injector, cylinder 2 |
N32 | Injector, cylinder 3 |
N33 | Injector, cylinder 4 |
N83 | Injector, cylinder 5 |
N84 | Injector, cylinder 6 |
T10 | 10-pin connector, orange, in connector protective housing, on left in plenum chamber |
D95 | Connection (injectors), in engine compartment wiring harness |
* | Wire W for self-diagnosis |
Wiring Diagram SEAT LEON 2005 - Secondary air pump motor - secondary air pump relay - lambda probe - lambda probe after catalytic converter - Motronic control unit
G39 | Lambda probe |
G130 | Lambda probe after catalytic converter |
J220 | Motronic control unit |
J299 | Secondary air pump relay |
V101 | Secondary air pump motor |
Z19 | Lambda probe heater |
Z29 | Lambda probe 1 heater after catalytic converter |
T4p | 4-pin connector, centre in engine compartment |
T6q | 6-pin connector, on exhaust pipe |
10 | Earth point, in plenum chamber |
D108 | Connection 6, in engine compartment wiring harness |
E7 | Positive connection (87a), in Motronic wiring harness |
Wiring Diagram SEAT LEON 2005 - Motronic control unit - lambda probe 2 - lambda probe 2 after catalytic converter - lambda probe 2 heater after catalytic converter
F | Brake light switch |
G108 | Lambda probe 2 |
G131 | Lambda probe 2 after catalytic converter |
J220 | Motronic control unit |
Z28 | Lambda probe 2 heater |
Z30 | Lambda probe 2 heater after catalytic converter |
T4na | 4-pin connector, near catalytic converter |
T6w | 6-pin connector, near catalytic converter |
T10e | 10-pin connector, black, in connector protective housing, on left in plenum chamber |
10 | Earth point, in plenum chamber |
131 | Earth connection 2, in engine compartment wiring harness |
E7 | Positive connection (87a), in Motronic wiring harness |
W1 | Positive connection 1 (54), in rear wiring harness |
Wiring Diagram SEAT LEON 2005 - Motronic control unit - air mass meter - secondary air inlet valve - active charcoal filter system solenoid valve 1
G70 | Air mass meter |
J104 | ABS control unit with EDL |
J220 | Motronic control unit |
N80 | Activated charcoal filter system solenoid valve 1 (pulsed) |
N112 | Secondary air inlet valve |
T10d | 10-pin connector, green, in connector protective housing, on left in plenum chamber |
A121 | Connection (high bus), in dash panel wiring harness |
A122 | Connection (low bus), in dash panel wiring harness |
D103 | Connection 3, in engine compartment wiring harness |
E30 | Connection (87a), in engine wiring harness |
Wiring Diagram SEAT LEON 2005 - Motronic control unit - fuel pump relay - charge pressure control solenoid valve - variable camshaft timing valve -1-
F36 | Clutch pedal switch |
J17 | Fuel pump relay |
J220 | Motronic control unit |
J234 | Airbag control unit |
N75 | Charge pressure control solenoid valve |
N205 | Inlet camshaft control valve 1 |
T10 | 10-pin connector, orange, in connector protective housing, on left in plenum chamber |
T10d | 10-pin connector, green, in connector protective housing, on left in plenum chamber |
T6l | 6-pin connector, brown, in connector protective housing, on left in plenum chamber |
A20 | Connection (15a), in dash panel wiring harness |
A27 | Connection (speed signal), in dash panel wiring harness |
A125 | Connection (crash signal), in dash panel wiring harness |
Wiring Diagram SEAT LEON 2005 - Fuel gauge sender - fuel system pressurisation pump - coolant shortage indicator sender - fuel gauge sender 2
G | Fuel gauge sender |
G6 | Fuel system pressurisation pump |
G32 | Coolant shortage indicator sender |
G169 | Fuel gauge sender 2 |
N79 | Heater element for crankcase breather |
S228 | Fuse on fuse holder |
S234 | Fuse on fuse holder |
S243 | Fuse on fuse holder |
T6l | 6-pin connector, brown, in connector protective housing, on left in plenum chamber |
T14a | 14-pin connector, in left wiring harness |
33 | Earth point, on right behind dash panel |
81 | Earth connection 1, in dash panel wiring harness |
269 | Earth connection (sender earth) 1, in dash panel wiring harness |
504 | Screw connection 1 (87F), on relay plate |
A99 | Connection 1 (87), in dash panel wiring harness |
A100 | Connection 2 (87), in dash panel wiring harness |
* | for models with four-wheel drive only |
Wiring Diagram SEAT LEON 2005 - Control unit with display in dash panel insert - oil pressure switch - speedometer sender - oil pressure warning buzzer - alternator warning lamp
F1 | Oil pressure switch |
F4 | Reversing light switch |
G22 | Speedometer |
H11 | Oil pressure warning buzzer |
J285 | Control unit with display in dash panel insert |
K2 | Alternator warning lamp |
K3 | Oil pressure warning lamp |
K28 | Coolant temperature and coolant shortage warning lamp |
K83 | Exhaust emissions warning lamp |
K132 | Electric power control fault lamp |
S7 | Fuse in relay plate fuse holder |
T10 | 10-pin connector, orange, in connector protective housing, on left in plenum chamber |
T14a | 14-pin connector, in left wiring harness |
B163 | Positive connection 1 (15), in interior wiring harness |
Wiring Diagram SEAT LEON 2005 - Control unit with display in dash panel insert - multifunction display - multifunction display call-up button - multifunction display memory switch
E86 | Multifunction display call-up button |
E109 | Multifunction display memory switch |
G1 | Fuel gauge |
G3 | Coolant temperature gauge |
G5 | Rev. counter |
G21 | Speedometer |
J119 | Multifunction display |
J285 | Control unit with display in dash panel insert |
K105 | Reserve fuel warning lamp |
A13 | Connection (door contact switch), in dash panel wiring harness |
* | only models with multifunction display |
** | Wire W for self-diagnosis |
SEAT LEON 2005 Overview of relay
1 - | Relay in left engine compartment |
q | Position of relays → page 804/2 |
2 - | Relay on relay plate |
q | Position of relays → page 804/3 |
2 - | Relay on the 13 position additional relay carrier above the relay plate |
q | Position of relays → page 804/4 |
Toledo/León | Fitting Locations | No. 804 / 2 |
Toledo/León | Fitting Locations | No. 804 / 3 |
|
Toledo/León | Fitting Locations | No. 804 / 4 |
|
|
Toledo/León | Fitting Locations | No. 804 / 5 |
|