SEAT LEON 2005 – CAN network-Bus – operating . Wiring diagrams, Pin Connector, Location

Wiring Diagram SEAT LEON 2005 - Control unit with warning lamps on the instrument panel - airbag control unit

D	Ignition and starter switch
J...	Engine control units
J234	Airbag control unit
J285	Control unit with warning lamps on instrument panel
S5	Fuse in fuse holder/relay plate
S12	Fuse in fuse holder/relay plate
T10	10-way connector, orange, in the connector's protective casing, plenum chamber, left
T16	16-way connector, self-diagnosis
81	Earth connection -1-, instrument panel wiring harness
135	Earth connection -2-, instrument panel wiring harness
501	Bolted joint -2- (30), on the relay plate
A2	Positive connection (15), instrument panel wiring harness
A20	Connection (15a), instrument panel wiring harness
A76	Connection (diagnosis cable K), instrument panel wiring harness
A121	Connection (High-Bus), instrument panel wiring harness
A122	Connection (Low-Bus), instrument panel wiring harness
*	W self-diagnosis line

Wiring Diagram SEAT LEON 2005 - Engine control units - control unit for ABS with EDS - automatic gearbox control unit - four-wheel drive control unit

G85	Steering angle sender
J104	Control unit for ABS with EDS
J217	Automatic gearbox control unit
J220	Motronic control unit
J248	Direct diesel injection control unit
J361	Simos control unit
J448	4AV control unit (injection system)
J492	Four-wheel drive control unit
T6o	6-way connector, beside the steering column
T8q	8-way connector, in the Syncro
T10d	10-way connector, green, in the connector's protective casing, plenum chamber, left
T25	25-way connector
T47	47-way connector
T68	68-way connector
T80	80-way connector
T121	121-way connector
A121	Connection (High-Bus), instrument panel wiring harness
A122	Connection (Low-Bus), instrument panel wiring harness

SEAT LEON 2005 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 2005 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 2005 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 2005 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 2005 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 2005 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 2005 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