SEAT LEON 2002 – 1.6 l Marelli 4LV/77 kW, engine codes AZD . Wiring diagrams, Pin Connector, Location

Wiring Diagram SEAT LEON 2002 - 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
S10	Fuse in fuse box/relay plate
S163	Fuse -2- (30), in fuse box/battery
S176	Fuse -4- (30), in fuse box/battery
S177	Fuse -5- (30), in fuse box/battery
S229	Fuse in fuse box
T2k	2-pin connector, on engine
T4l	4-pin connector, on engine
T6l	6-pin connector, brown, in protective housing for connectors, in plenum chamber, left
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
A41	Positive (+) connection (50), in dash panel wiring harness
*	Only models with air conditioner

Wiring Diagram SEAT LEON 2002 - 4LV (injection system) control unit - ignition coil 1 with output stage - ignition coil 2 with output stage - spark plug connector

J448	4LV (injection system) 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 protective housing for connectors, in plenum chamber, left
T14a	14-pin connector, in cable channel left
16	Earth point, on cylinder head cover
85	Earth connection -1-, in engine compartment wiring harness
281	Earth connection -1-, in engine prewiring wiring harness
A104	Positive (+) connection -2- (15), in dash panel wiring harness
D134	Connection (ignition timing sender signal), in engine compartment wiring harness

Wiring Diagram SEAT LEON 2002 - 4LV control unit (injection system) - coolant temperature sender - hall sender - exhaust gas recirculation potentiometer - exhaust gas recirculation valve

G2	Coolant temperature sender
G40	Hall sender
G62	Coolant temperature sender
G212	Exhaust gas recirculation potentiometer
J448	4LV (injection system) control unit
N18	Exhaust gas recirculation valve
T10d	10-pin connector, green, in protective housing for connectors, in plenum chamber, left
T14a	14-pin connector, in cable channel left
220	Earth connection (sender earth), in engine wiring harness
D133	Connection (Hall sender signal), in engine compartment wiring harness

Wiring Diagram SEAT LEON 2002 - 4LV control unit (injection system) - throttle valve control unit - engine speed sender - intake manifold pressure sender

G28	Engine speed sender
G71	Intake manifold pressure sender
G72	Intake manifold temperature sender
G186	Throttle valve drive (electric throttle operation)
G187	Throttle valve drive angle sender -1- (electric throttle operation)
G188	Throttle valve drive angle sender -2- (electric throttle operation)
J293	Radiator fan control unit
J338	Throttle valve control unit
J448	4LV (injection system) control unit
T3b	3-pin connector, on radiator
T10	10-pin connector, orange, in protective housing for connectors, in plenum chamber, left
220	Earth connection (sender earth), in engine wiring harness

Wiring Diagram SEAT LEON 2002 - 4LV (injection system) control unit - knock sensor I - accelerator pedal position sender - accelerator pedal position sender -2-

E35	Air conditioner switch
G61	Knock sensor I
G79	Accelerator pedal position sender
G185	Accelerator pedal position sender -2-
J255	Climatronic control unit
J293	Radiator fan control unit
J448	4LV (injection system) control unit
T10	10-pin connector, orange, in protective housing for connectors, in plenum chamber, left
T10e	10-pin connector, black, in protective housing for connectors, in plenum chamber, left
T10h	10-pin connector, blue, in protective housing for connectors, in plenum chamber, left
131	Earth connection -2-, in engine compartment wiring harness
139	Earth connection (sender earth), in Motronic wiring harness

Wiring Diagram SEAT LEON 2002 - 4LV (injection system) control unit - injector - cylinder 1 - injector - cylinder 2 - injector - cylinder 3 - injector - cylinder 4

J448	4LV (injection system) control unit
N30	Injector, cylinder 1
N31	Injector, cylinder 2
N32	Injector, cylinder 3
N33	Injector, cylinder 4
S232	Fuse in fuse box
T10	10-pin connector, orange, in protective housing for connectors, in plenum chamber, left
T14a	14-pin connector, in cable channel left
B168	Connection (86), in interior wiring harness
D95	Connection (injectors), in engine compartment wiring harness
*	Wire W for self-diagnosis

Wiring Diagram SEAT LEON 2002 - 4LV/4MV control unit (injection system) - lambda probe - lambda probe after catalyst - ctivated charcoal filter system solenoid valve 1 - lambda probe heater

G39	Lambda probe
G130	Lambda probe after catalyst
J104	ABS with EDL control unit
J448	4LV (injection system) control unit
N80	Activated charcoal filter system solenoid valve 1 (pulsed)
Z19	Lambda probe heater
Z29	Lambda probe 1 heater, downstream of catalytic converter
T4p	4-pin connector, centre in engine compartment
T6q	6-pin connector, on exhaust pipe
T10d	10-pin connector, green, in protective housing for connectors, in plenum chamber, left
A121	Connection (high bus), in dash panel wiring harness
A122	Connection (low bus), in dash panel wiring harness
E7	Positive (+) connection (87a), in Motronic wiring harness

Wiring Diagram SEAT LEON 2002 - 4LV control unit (injection system) - fuel pump relay - clutch pedal switch

D	Ignition/starter switch
F36	Clutch pedal switch
J17	Fuel pump relay
J234	Airbag control unit
J448	4LV (injection system) control unit
T6l	6-pin connector, brown, in protective housing for connectors, in plenum chamber, left
T10	10-pin connector, orange, in protective housing for connectors, in plenum chamber, left
T10d	10-pin connector, green, in protective housing for connectors, in plenum chamber, left
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 2002 - Fuel gauge sender - fuel pump (pre-supply pump) - coolant shortage indicator sender

G	Fuel gauge sender
G6	Fuel pump (pre-supply pump)
G32	Coolant shortage indicator sender
N79	Heater element (crankcase breather)
S228	Fuse in fuse box
S234	Fuse in fuse box
S243	Fuse in fuse box
T6l	6-pin connector, brown, in protective housing for connectors, in plenum chamber, left
T14a	14-pin connector, in cable channel left
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

Wiring Diagram SEAT LEON 2002 - Control unit with display in dash panel insert - oil pressure switch - speedometer sender - oil pressure warning buzzer - alternator warning lamp

F1	Oil pressure switch
G22	Speedometer sender
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 warning lamp/coolant shortage warning lamp
K83	Exhaust emissions warning lamp
K132	Electronic power control fault lamp
S7	Fuse in fuse box/relay plate
T14a	14-pin connector, in cable channel left
B163	Positive (+) connection -1- (15), in interior wiring harness
D51	Positive (+) connection -1- (15), in engine compartment wiring harness

Wiring Diagram SEAT LEON 2002 - Control unit with display in dash panel insert - multi-function display - multi-function display call-up button - multi-function display - memory switch

E86	Multi-function display call-up button
E109	Multi-function display, memory switch
G1	Fuel gauge
G3	Coolant temperature gauge
G5	Rev. counter
G21	Speedometer
J119	Multi-function 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 multi-function display
**	Wire W for self-diagnosis

SEAT LEON 2002 Overview of relay

Overview of relay    

1 -

2 -	Relay on relay plate

q	Position of relays

2 -

Relay in left engine compartment:

A -	Secondary air pump relay -J299- (100)

-	High heat output relay -J360- (100) (only models with auxiliary heater)

B -	Terminal 30 voltage supply relay -J689- (428)

-	Current supply relay for Simos control unit -J363- (429) (for models with engine code BFQ only)

-	Low heat output relay -J359- (53) (only models with auxiliary heater)

C -

Vacant

 

SEAT LEON 2002 Relay on relay plate

Relay on relay plate

1 -	Dual tone horn relay -J4- (53)

2 -	X-contact relief relay -J59- (100)

3 -

Vacant

4 -	Fuel pump relay -J17- (409)

-	Glow plug relay -J52- (103)

V y Vl -

Automatic intermittent wash and wipe relay -J31-

-	with rain sensor, with/without headlight washer system (192)

-	without rain sensor, with headlight washer system (389)

-	without rain sensor, without headlight washer system (377)

 

SEAT LEON 2002 Relay on the 13 position additional relay carrier above the relay plate

Relay on the 13 position additional relay carrier above the relay plate

Left-handdrive vehicles:

1 -	Telephone relay

2....9 -

Vacant

10 -	Fuel pump relay (turbo diesel engine unit injectors) (167) -J17- (up to October 2002)

-	Fuel pump relay (TDI-PD) (53) (from November 2002)

11 -	Automatic gearbox relay AG4 -J60- (175)

12 -	Terminal 30 voltage supply relay -J317- (109)

13 -	Radiator fan relay (53)

 

Right-handdrive vehicles: 1....5 -  Vacant 6 -  Telephone switch-over relay 7 -  Radiator fan relay -J26- (53) 8 -  Terminal 30 voltage supply relay (109) 9 -  Automatic gearbox relay AG4 -J60- (175) 10 -  Fuel pump relay (turbo diesel engine unit injectors)-J17- (167) (up to October 2002)  -  Fuel pump relay (TDI-PD) (53) (from November 2002) 11 -  Vacant 12 -  Cigarette lighter relay Australia -J193- (53) 13 -  Vacant

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SEAT LEON 2002 Glow plug activation control unit:

Glow plug activation control unit:

A -	Glow plug activation control unit -J370- (with engine code ARL only)

 

SEAT LEON 2002 Overview of fuses

Overview of fuses    

1 -

q	Position of fuses

2 -

3 -	Fuse on fuse holder -S162-, -S163-, -S164-, -S176-, -S177-, -S178-, -S179-, -S180-, next to battery

q	Location, up to August 2000:

q	Location, from September 2000:

Fuse in fuse holder, dash panel

Fuse colours

30 A -

green

25 A -

white

20 A -

yellow

15 A -

blue

10 A -

red

7,5 A -

brown

5 A -

beige

3 A -

purple

The fuse electrical connections are shown in the respective current flow diagrams. The fuses for options not mentioned are also shown in the respective Current flow diagrams.

Fuses from S 24 are designated with an additional characteristic o. distinctive feature "2" in the Current Flow Diagram, for example: S 40 is designated as S 240.

 

SEAT LEON 2002 Position of fuses in fuse holder, left dash panel

Position of fuses in fuse holder, left dash panel

No.		Current Flow Diagram designation	Nominal value		Function/component	Terminal
1	-	-S1-	10A	-	Glove compartment light, heated washer jets
2	-	-S2-	10A	-	Turn signals
3	-	-S3-	5A	-	Side light warning lamp
4	-	-S4-	5A	-	Number plate light
5	-	-S5-	7.5A	-	Number plate light
6	-	-S6-	5A	-	Electric folding exterior mirror and window regulator (applicable up to October 2001) Convenience system central control unit (applicable from November 2001)
7	-	-S7-	10A	-	Reversing light
8	-	-S8-	5A	-	Telephone
9	-	-S9-	5A	-	ABS/ESP/HALDEX
10	-	-S10-	10A	-	Petrol engine control unit (applicable up to October 2001) Diesel engine control unit (applicable up to October 2001) - S-contact (applicable from November 2001)
11	-	-S11-	5A	-	Dash panel insert
12	-	-S12-	7.5A	-	Diagnosis voltage
13	-	-S13-	10A	-	Brake lights
14	-	-S14-	10A	-	Interior light
15	-	-S15-	5A	-	Dash panel insert, steering angle sender
16	-	-S16-	10A	-	Compressor

SEAT LEON 2002 Position of fuses in fuse holder, left dash panel

Toledo/León	Fitting Locations	No.  802 / 5

Toledo/León Fitting Locations No.  802 / 6 Toledo/León Fitting Locations No.  802 / 7 Auxiliary fuse above additional relay carrier Right-handdrive vehicles A -  Seat adjustment fuse -S45- (30 A) B -  Vacuum pump fuse (20 A) C -  Window regulator fuse -S37- (30 A) D -  Fuel charging hole fuse -S323- (10 A) E -  Alarm horn fuse -S111- (15 A)  -  Turn signal fuse -S144- (15 A) F -  Taxi fuse (15 A) G -  Vacant H -  Vacant   https://portal-diagnostov.com/license.html https://portal-diagnostov.com/license.html Automotive Electricians Portal FZCO Automotive Electricians Portal FZCO Obtenez l'accès à tous les schémas de câblage de la voiture Left-handdrive vehicles: A -  Seat adjustment fuse -S45- (30 A) B -  Vacuum pump fuse (20 A) C -  Window regulator fuse -S37- (30 A) D -  Vacant E -  Taxi fuse (15 A) F -  Alarm horn fuse 1 -S111- (15 A)  -  Turn signal fuse -S144- (15 A) G -  Fuel charging hole fuse -S323- (10 A) H -  Vacant   https://portal-diagnostov.com/license.html https://portal-diagnostov.com/license.html Automotive Electricians Portal FZCO Automotive Electricians Portal FZCO Obtenez l'accès à tous les schémas de câblage de la voiture SEAT LEON 2002 Fuse on fuse holder, next to battery (up to August 2000): Fuse on fuse holder, next to battery (up to August 2000): Fuses: S162 -  Glow plug heater 50 A S163 -  Engine control unit 50 A S164 -  Radiator fan 40 A S176 -  Passenger compartment, 110A S177 -  Alternator (90 A), 110 A  -  Alternator (120 A), 150 A S178 -  ABS (pump), 30 A S179 -  ABS, 30 A S180 -  Radiator fan 30 A

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SEAT LEON 2002 Fuse on fuse holder, next to battery (from September 2000):

Fuse on fuse holder, next to battery (from September 2000):

A -	Red wire, 16mm²

   

Fuses: S162 -  Glow plug heater 50 A S163 -  Engine control unit 50 A S164 -  Radiator fan 40 A S176 -  Passenger compartment, 110A S177 -  Alternator (90 A), 110 A  -  Alternator (120 A), 150 A S178 -  ABS (pump), 30 A S179 -  ABS, 30 A S180 -  Radiator fan 30 A

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SEAT LEON 2002 Overview of coupling station and connections for wiring harness

Overview of coupling station and connections for wiring harness    

1 -	Coupling station in protective housing, in plenum chamber

q	With connectors -T10g-, -T10d-, -T10e-, -T10-, -T6l-, -T10h-,

2 -	Coupling station, right B-pillar

q	With connector

3 -	Coupling station on left of C-pillar

q

Location

4 -	Coupling station on left of A-pillar

q	With connector

5 -	Coupling station in engine compartment, in left wiring harness

q

Location

Coupling station in protective housing, in plenum chamber

1 -	10-pin connector -T10g-, grey, automatic gearbox

2 -	10-pin connector, -T10d-, white, data bus wire, engine control unit, automatic gearbox, Motronic control unit, ABS control unit

3 -	10-pin connector -T10e-, black, cruise control system, Motronic control unit, engine control unit

4 -	10-pin connector -T10-, orange, reversing lights, engine control unit, starter, Climatronic control unit, Motronic control unit

5 -	6-pin connector -T6l-, brown, starter, fuel pump relay, engine control unit

Toledo/León	Fitting Locations	No.  803 / 3

6 -	10-pin connector -T10h-, blue, accelerator position sender, Motronic control unit, engine control unit

7 -	10-pin connector, -T10v-, green, radiator outlet coolant temperature sender, radiator fan control unit, potentiometer for temperature selection rotary knob

SEAT LEON 2002 Coupling station, right B-pillar

Coupling station, right B-pillar

1 -	10-pin connector -T10m-, black, signal loudspeakers, central locking, rear electric window regulator, rear door warning lamp

The wiring on the B-pillar, left, is installed vice versa.

 

SEAT LEON 2002 Coupling station on left of C-pillar Coupling station on left of C-pillar See connectors in fitting locations: Multi-pin connections. 1 -  Earth connection 2 -  Rear fog light, number plate light, reversing lights black 3 -  Rear window wiper and washer system (only for Leon) pink 4 -  Central locking brown

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SEAT LEON 2002 Coupling station on left of A-pillar

Coupling station on left of A-pillar

1 -	10-pin connector -T10i-, black, central locking, electric mirror adjustment, radio with muting / electric windows

The wiring on the A-pillar, right, is installed vice versa.

 

SEAT LEON 2002 Coupling station in engine compartment, in left wiring harness Coupling station in engine compartment, in left wiring harness See connectors in fitting locations: Multi-pin connections.

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SEAT LEON 2002 Overview of earth points in engine compartment

Overview of earth points in engine compartment    

608	Earth point, in centre of plenum chamber ⇒ -arrow-

 

10 Earth point, in plenum chamber ⇒ -arrow-

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609	Earth point, on right in plenum chamber ⇒ -arrow-

 

1 Earth strap, battery - body ⇒ Arrow A

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12	Earth points, on left in engine compartment ⇒ -arrow B-

 

2 Earth strap, gearbox - body ⇒ -arrow-

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Overview of earth points in vehicle interior

Toledo/León	Fitting Locations	No.  801 / 6

43	Earth point, lower part of right A-pillar ⇒ -arrow-

 

78 Earth point on right B-pillar ⇒ -arrow-

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77	Earth point on left B-pillar ⇒ -arrow-

 

44 Earth point, lower part of left A-pillar ⇒ -arrow-

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33	Earth point behind dash panel on right ⇒ -arrow-

42	Same earth point as ⇒ -arrow-

 

32	Earth point behind dash panel on left ⇒ -arrow-

 

45 Earth point, behind dash panel

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SEAT LEON 2002 Overview of earth points in luggage compartment (Toledo)

Overview of earth points in luggage compartment (Toledo)

50	Earth point, on left in luggage compartment

  Overview of earth points in luggage compartment (León)

57	Earth point, left rear pillar