SEAT LEON 2002 – Anti-locking brake system (ABS) with electronic differential lock (EDL), traction control system (TCS), electronic stability program (ESP) and brake pad wear control (Mark 60), not for models with engine code AMK . Wiring diagrams, Pin Connector, Location

Wiring Diagram SEAT LEON 2002 - ABS control unit with EDL - TCS and ESP - TCS and ESP button - traction control switch illumination bulb

A	Battery
D	Ignition/starter switch
E256	TCS and ESP button
F	Brake light switch
J104	ABS control unit with EDL, TCS and ESP
L71	Traction control switch illumination
S9	Fuse in relay plate fuse holder
S178	Fuse 6 (30) in fuse holder on battery
S179	Fuse 7 (30) in fuse holder on battery
T3	3-pin connector, on the battery
A2	Positive connection (15), in dash panel wiring harness
A38	Positive connection 2 (15a), in dash panel wiring harness
A132	Connection (TCS/ESP), in dash panel wiring harness
W1	Positive connection 1 (54), in rear wiring harness
*	only models with ESP
**	only models with TCS

Wiring Diagram SEAT LEON 2002 - ABS control unit with EDL - TCS and ESP - steering angle sender - rear right ABS inlet valve - rear left ABS inlet valve

G85	Steering angle sender
J...	Engine control units
J104	ABS control unit with EDL, TCS and ESP
J217	Automatic gearbox control unit
N133	Rear right ABS inlet valve
N134	Rear left ABS inlet valve
N135	Rear right ABS outlet valve
N136	Rear left ABS outlet valve
T6o	6-pin connector, next to steering column
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
*	only models with automatic gearbox
**	for models with four-wheel drive only

Wiring Diagram SEAT LEON 2002 - ABS control unit with EDL - TCS and ESP - front right speed sensor - front left speed sensor

G45	Front right speed sensor
G47	Front left speed sensor
J104	ABS control unit with EDL, TCS and ESP
N99	Front right ABS inlet valve
N100	Front right ABS outlet valve
N101	Front left ABS inlet valve
N102	Front left ABS outlet valve
N227	Vehicle stabilization program high pressure valve 1
N228	Vehicle stabilization program high pressure valve 2
T2d	2-pin connector, on front left ABS sensor
T2e	2-pin connector, on front right ABS sensor
*	models with brake wear indicator only

Wiring Diagram SEAT LEON 2002 - ABS hydraulic pump - rear speed sensor - ABS control unit with EDL - TCS and ESP - ESP sensor unit

G44	Rear right speed sensor
G46	Rear left speed sensor
G200	Lateral acceleration sender
G202	Yaw rate sender
G419	ESP sensor unit
J104	ABS control unit with EDL, TCS and ESP
N225	Vehicle stabilization program switch valve 1
N226	Vehicle stabilization program switch valve 2
V64	ABS hydraulic pump
T2f	2-pin connector, on rear left ABS sensor
T2g	2-pin connector, on rear right ABS sensor
D146	Connection (rear left speed sensor +), in engine compartment wiring harness
D147	Connection (rear left speed sensor -), in engine compartment wiring harness
D148	Connection (rear right speed sensor +), in engine compartment wiring harness
D149	Connection (rear right speed sensor -), in engine compartment wiring harness

Wiring Diagram SEAT LEON 2002 - ABS control unit with EDL - TCS and ESP - brake pressure sender 2 - longitudinal acceleration sender

J104	ABS control unit with EDL, TCS and ESP
J503	Control unit with display for radio and navigation system
G214	Brake pressure sender 2
G251	Longitudinal acceleration sender
T16	16-pin connector, self-diagnosis
A76	Connection (diagnosis wire K), in dash panel wiring harness
A133	Connection (left ABS impulse), in dash panel wiring harness
A134	Connection (right ABS impulse), in dash panel wiring harness
*	only models with navigation system
**	for models with four-wheel drive only

Wiring Diagram SEAT LEON 2002 - Control unit with display in dash panel insert - handbrake warning switch - brake fluid level warning contact - trailer operation warning lamp

E3	Hazard warning light switch
F9	Handbrake warning switch
F34	Brake fluid level warning contact
J217	Automatic gearbox control unit
J285	Control unit with display in dash panel insert
K18	Trailer operation warning lamp
K47	ABS warning lamp
K118	Brake system warning lamp
S15	Fuse in relay plate fuse holder
T10g	10-pin connector, grey, in connector protective housing, on left in plenum chamber
176	Earth connection, in right headlight wiring harness
179	Earth connection, in left headlight wiring harness
501	Screw connection 2 (30), on relay plate
A52	Positive connection 2 (30), in dash panel wiring harness
A76	Connection (diagnosis wire K), in dash panel wiring harness
A115	Connection (handbrake warning), in dash panel wiring harness
*	only models with automatic gearbox

Wiring Diagram SEAT LEON 2002 - Control unit in dash panel insert - front left brake pad wear sender - brake pad warning lamp

G34	Front left brake pad wear sender
J...	Engine control units
J255	Climatronic control unit
J285	Control unit with display in dash panel insert
K32	Brake pad warning lamp
K155	Electronic stabilisation program warning lamp
T10	10-pin connector, orange, in connector protective housing, on left in plenum chamber
T12d	12-pin connector, on Climatronic
81	Earth connection 1, in dash panel wiring harness
135	Earth connection 2, in dash panel wiring harness
D53	Connection (right brake wear indicator) in engine compartment wiring harness
D54	Connection (right brake wear indicator) in engine compartment wiring harness
*	models with brake wear indicator 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 Tüm kablolama şemalarına erişin araba 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 Tüm kablolama şemalarına erişin araba 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 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

 

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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