SEAT LEON 2004 – Automatic gearbox (AG4), 1.8 l/92 kW Motronic, engine codes APG . Wiring diagrams, Pin Connector, Location

Wiring Diagram SEAT LEON 2004 - Starter inhibitor and reversing light relay

B	Starter
D	Ignition/starter switch
J226	Starter inhibitor and reversing light relay
M16	Reversing light bulb, left
M17	Reversing light bulb
T6l	6-pin connector, brown, in protective housing for connectors, on left in plenum chamber
T10g	10-pin connector, grey, in protective housing for connectors, on left in plenum chamber
114	Earth connection, in automatic gearbox wiring harness
A87	Connection (reversing light), in dash panel wiring harness

Wiring Diagram SEAT LEON 2004 - Automatic gearbox control unit - multi-function switch

F125	Multi-function switch
J217	Automatic gearbox control unit
J220	Motronic control unit
J255	Climatronic control unit
J285	Control unit with display in dash panel insert
J293	Radiator fan control unit
Y6	Selector lever position indicator
T8p	8-pin connector
T10	10-pin connector, orange, in protective housing for connectors, on left in plenum chamber
T10g	10-pin connector, grey, in protective housing for connectors, on left in plenum chamber
T10n	10-pin connector, on dash panel insert
T16	16-pin connector, self-diagnosis
A52	Positive (+) connection -2- (30), in dash panel wiring harness
A76	Connection (diagnosis wire K), in dash panel wiring harness

Wiring Diagram SEAT LEON 2004 - Automatic gearbox control unit - gearbox speed sender - gearbox oil temperature sender - solenoid valve

F	Brake light switch
G38	Gearbox speed sender
G93	Gearbox oil temperature sender
J104	ABS with EDL control unit
J217	Automatic gearbox control unit
J220	Motronic control unit
N88	Solenoid valve 1
N89	Solenoid valve 2
N90	Solenoid valve 3
N91	Solenoid valve 4
N92	Solenoid valve 5
N93	Solenoid valve 6
N94	Solenoid valve 7
T2x	2-pin connector
T10d	10-pin connector, green, in protective housing for connectors, on left in plenum chamber
T10g	10-pin connector, grey, in protective housing for connectors, on left in plenum chamber
W1	Positive (+) connection -1- (54), in rear wiring harness

Wiring Diagram SEAT LEON 2004 - Automatic gearbox control unit - vehicle speed sender - selector lever position P/N warning lamp - selector lever display illumination

E20	Lighting regulator - switches and instruments
G68	Vehicle speed sender
J217	Automatic gearbox control unit
J285	Control unit with display in dash panel insert
J492	Four-wheel drive control unit
K142	Selector lever position P/N warning lamp
L101	Selector lever display illumination
N110	Selector lever lock solenoid
T3g	3-pin connector, on gearbox
T10g	10-pin connector, grey, in protective housing for connectors, on left in plenum chamber
135	Earth connection -2-, in dash panel wiring harness
A2	Positive (+) connection (15), in dash panel wiring harness
A4	Positive (+) connection (58b), in dash panel wiring harness
B163	Positive (+) connection -1- (15), in interior wiring harness
B165	Positive (+) connection -2- (15), in interior wiring harness
U8	Positive (+) connection (15a), in automatic gearbox wiring harness
*	Only models allroad

Wiring Diagram SEAT LEON 2004 - Brake servo control unit - vacuum pump for brakes

D	Ignition/starter switch
J220	Motronic control unit
J542	Brake servo control unit
S15	Fuse in fuse box/relay plate
S283	Brake vacuum pump fuse
V192	Vacuum pump for brakes
T6na	6-pin connector, on left subframe
T10	10-pin connector, orange, in protective housing for connectors, on left in plenum chamber
81	Earth connection -1-, in dash panel wiring harness
501	Screw connection -2- (30), on relay plate
A32	Positive (+) connection (30), in dash panel wiring harness

SEAT LEON 2004 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 2004 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 2004 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 2004 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 2004 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 2004 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 2004 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