SEAT LEON 2003 – Climatronic . Wiring diagrams, Pin Connector, Location

Wiring Diagram SEAT LEON 2003 - Temperature flap control motor - Climatronic control unit

D	Ignition/starter switch
E87	Rear Climatronic operating and display unit
G92	Temperature flap control motor potentiometer
J255	Climatronic control unit
L75	Digital display illumination bulb
L76	Button illumination bulb
S5	Fuse in relay plate fuse holder
S11	Fuse in relay plate fuse holder
V42	Temperature sensor blower
V68	Temperature flap control motor
T6p	6-pin connector
T12d	12-pin connector, on Climatronic
T17a	17-pin connector, on Climatronic
243	Earth connection 1, in Climatronic wiring harness
A2	Positive connection (15), in dash panel wiring harness
A20	Connection (15a), in dash panel wiring harness
A58	Connection (5 volt), in dash panel wiring harness

Wiring Diagram SEAT LEON 2003 - Climatronic control unit - potentiometer for centre flap control motor - potentiometer for footwell/defroster flap control motor

G112	Central flap control motor potentiometer
G114	Footwell/defroster flap control motor potentiometer
J255	Climatronic control unit
J285	Control unit with display in dash panel insert
V70	Central flap control motor
V85	Footwell and defroster flap control motor
T6r	6-pin connector
T6s	6-pin connector
T12d	12-pin connector, on Climatronic
T16	16-pin connector, self-diagnosis
243	Earth connection 1, in Climatronic wiring harness
A58	Connection (5 volt), in dash panel wiring harness
A76	Connection (diagnosis wire K), in dash panel wiring harness

Wiring Diagram SEAT LEON 2003 - Climatronic control unit - fresh air intake duct temperature sensor - potentiometer for air flow flap control motor

G89	Fresh air intake duct temperature sensor
G113	Air flow flap control motor potentiometer
G192	Footwell vent temperature sender
J...	Engine control units
J255	Climatronic control unit
J285	Control unit with display in dash panel insert
V71	Air flow flap control motor
T5r	5-pin connector
T10	10-pin connector, orange, in connector protective housing, on left in plenum chamber
T17a	17-pin connector, on Climatronic
243	Earth connection 1, in Climatronic wiring harness
A45	Connection (RPM signal), in dash panel wiring harness
A58	Connection (5 volt), in dash panel wiring harness

Wiring Diagram SEAT LEON 2003 - Sunlight penetration photosensor - ambient temperature sensor - dash panel temperature sensor - fresh air blower - Climatronic control unit

E1	Light switch
G17	Ambient temperature sensor
G56	Dash panel temperature sensor
G107	Sunlight penetration photosensor
J126	Fresh air blower control unit
J255	Climatronic control unit
V2	Fresh air blower
T12d	12-pin connector, on Climatronic
T17a	17-pin connector, on Climatronic
243	Earth connection 1, in Climatronic wiring harness
244	Earth connection (sender earth), in Climatronic wiring harness
257	Earth connection 2, in Climatronic wiring harness
A11	Positive connection (58b), in dash panel wiring harness
L67	Positive connection (75X), in Climatronic wiring harness

Wiring Diagram SEAT LEON 2003 - Climatronic control unit

J...	Engine control units
J255	Climatronic control unit
J285	Control unit with display in dash panel insert
T10	10-pin connector, orange, in connector protective housing, on left in plenum chamber
T12d	12-pin connector, on Climatronic
T17a	17-pin connector, on Climatronic
81	Earth connection 1, in dash panel wiring harness
135	Earth connection 2, in dash panel wiring harness
A27	Connection (speed signal), in dash panel wiring harness

Wiring Diagram SEAT LEON 2003 - Radiator fan control unit - radiator fan - radiator fan on right - continued coolant circulation pump

J248	Diesel direct injection system control unit
J285	Control unit with display in dash panel insert
J293	Radiator fan control unit
V7	Radiator fan
V35	Right fan for radiator
V51	Continued coolant circulation pump
T3b	3-pin connector, on radiator fan
T3c	3-pin connector, on radiator fan
T10d	10-pin connector, green, in connector protective housing, on left in plenum chamber
T14a	14-pin connector, in cable channel left
85	Earth connection 1, in engine compartment wiring harness
176	Earth connection, in right headlight wiring harness
193	Earth connection 1, in coolant fan wiring harness
C11	Connection in radiator fan wiring harness
*	only models with engine codes AMK and BAM
**	only models with engine codes BDE and AQN

Wiring Diagram SEAT LEON 2003 - Radiator fan control unit - radiator fan thermal switch - high pressure sender - air conditioning system magnetic clutch

A	Battery
D	Ignition/starter switch
F18	Radiator fan thermal switch
G65	High pressure sender
J...	Engine control units
J293	Radiator fan control unit
N25	Air conditioning system magnetic coupling
T3	3-pin connector, on the battery
T4l	4-pin connector, on engine
T10	10-pin connector, orange, in connector protective housing, on left in plenum chamber
501	Screw connection 2 (30), on relay plate
503	Screw connection 2 (75x), on relay plate
A32	Positive connection (30), in dash panel wiring harness
D61	Connection (air conditioning system), in engine compartment wiring harness
K20	Positive connection 1 (30), in radiator fan wiring harness
K21	Connection 1, in radiator fan wiring harness
K23	Positive connection 2 (30), in radiator fan wiring harness

SEAT LEON 2003 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 2003 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 2003 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 2003 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 2003 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 2003 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 2003 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