SEAT TOLEDO 2003 – 1.9 l/81 kW turbo diesel engine, engine codes ASV . Wiring diagrams, Pin Connector, Location

Wiring Diagram SEAT TOLEDO 2003 - 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
E1	Light switch
J59	X contact relief relay
S162	Fuse -1- (30), in fuse box/battery
S163	Fuse -2- (30), in fuse box/battery
S176	Fuse -4- (30), in fuse box/battery
S177	Fuse -5- (30), in fuse box/battery
T2k	2-pin connector, on engine
T4l	4-pin connector, on engine
T6l	6-pin connector, brown, in protective housing for connectors, on left in plenum chamber
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
*	Only models with air conditioner
**	Only models with additional heater
***	Only models without additional heater

Wiring Diagram SEAT TOLEDO 2003 - Diesel direct injection system control unit - relay for glow plugs - terminal 30 voltage supply relay - accelerator pedal position sender

G79	Accelerator pedal position sender
G185	Accelerator pedal position sender -2-
J52	Glow plugs relay
J248	Diesel direct injection system control unit
J279	Radiator fan V7 and V35 relay, 1st speed
J293	Radiator fan control unit
J317	Terminal 30 voltage supply relay
Q6	Glow plugs - (engine)
T2j	2-pin connector, in engine compartment
T6l	6-pin connector, brown, in protective housing for connectors, on left in plenum chamber
T10d	10-pin connector, green, in protective housing for connectors, on left in plenum chamber
T10h	10-pin connector, blue, in protective housing for connectors, on left in plenum chamber
504	Screw connection -1- (87F), on relay plate
A104	Positive (+) connection -2- (15), in dash panel wiring harness
*	Only models with air conditioner
**	Only models with Climatronic

Wiring Diagram SEAT TOLEDO 2003 - Diesel direct injection system control unit - coolant temperature sender - engine speed sender - intake manifold pressure sender

D	Ignition/starter switch
G2	Coolant temperature sender
G28	Engine speed sender
G62	Coolant temperature sender
G71	Intake manifold pressure sender
G72	Intake manifold temperature sender
G80	Needle lift sender
J248	Diesel direct injection system control unit
S237	Fuse in fuse box
T2t	2-pin connector, on engine front
T3d	3-pin connector, near intake manifold
T10d	10-pin connector, green, in protective housing for connectors, on left in plenum chamber
T14a	14-pin connector, in cable channel left
200	Earth connection (screening), in engine compartment wiring harness
A80	Connection -1- (X), in dash panel wiring harness

Wiring Diagram SEAT TOLEDO 2003 - Diesel direct injection system control unit - fuel temperature sender - modulating piston movement sender - fuel shut-off valve - metering adjuster

E35	Air conditioner switch
G81	Fuel temperature sender
G149	Modulating piston movement sender
J248	Diesel direct injection system control unit
J255	Climatronic control unit
J293	Radiator fan control unit
N109	Fuel shut-off valve
N146	Metering adjuster
T10	10-pin connector, orange, in protective housing for connectors, on left in plenum chamber
T10d	10-pin connector, green, in protective housing for connectors, on left in plenum chamber
T10y	10-pin connector, on engine front
F25	Connection --1-, in diesel direct injection system wiring harness
*	Only models with multi-function display
**	Wire W for self-diagnosis

Wiring Diagram SEAT TOLEDO 2003 - Diesel direct injection system control unit - air mass meter - exhaust gas recirculation valve - charge pressure control solenoid valve

G70	Air mass meter
J104	ABS with EDL control unit
J248	Diesel direct injection system control unit
N18	Exhaust gas recirculation valve
N75	Charge pressure control solenoid valve
N108	Commencement of injection valve
N239	Intake manifold flap change-over valve
S234	Fuse in fuse box
T6l	6-pin connector, brown, in protective housing for connectors, on left in plenum chamber
T10d	10-pin connector, green, in protective housing for connectors, on left in plenum chamber
T10y	10-pin connector, on engine front
T14a	14-pin connector, in cable channel left
A100	Connection -2- (87), in dash panel wiring harness
E30	Connection (87a), in engine wiring harness

Wiring Diagram SEAT TOLEDO 2003 - Diesel direct injection system control unit - cruise control system switch - cruise control system (CCS) button (Set) - brake light switch - clutch pedal switch

E45	Cruise control system switch
E227	Cruise control system (CCS) button (Set)
F	Brake light switch
F36	Clutch pedal switch
F47	Cruise control system brake pedal switch (diesel direct injection system)
J248	Diesel direct injection system control unit
M21	Brake and tail light bulb, left
S13	Fuse in fuse box/relay plate
T10d	10-pin connector, green, in protective housing for connectors, on left in plenum chamber
T10e	10-pin connector, black, in protective housing for connectors, on left in plenum chamber
T10s	10-pin connector, next to steering column right
A98	Positive (+) connection -4- (30), in dash panel wiring harness
B131	Connection (54), in interior wiring harness
W1	Positive (+) connection -1- (54), in rear wiring harness

Wiring Diagram SEAT TOLEDO 2003 - Diesel direct injection system control unit - low heat output relay - high heat output relay - coolant heating elements

J248	Diesel direct injection system control unit
J359	Low heat output relay
J360	High heat output relay
N79	Heater element (crankcase breather)
Q7	Coolant heating elements
T6l	6-pin connector, brown, in protective housing for connectors, on left in plenum chamber
T6n	6-pin connector
T9a	9-pin connector
T10	10-pin connector, orange, in protective housing for connectors, on left in plenum chamber
131	Earth connection -2-, in engine compartment wiring harness
D50	Positive (+) connection (30), in engine compartment wiring harness
D74	Connection (86), in engine compartment wiring harness
D98	Connection (glow plugs), in engine compartment wiring harness
D111	Connection -9-, in engine compartment wiring harness
*	Only models with additional heater

Wiring Diagram SEAT TOLEDO 2003 - Fuel gauge sender - coolant shortage indicator sender

G	Fuel gauge sender
G32	Coolant shortage indicator sender
S5	Fuse in fuse box/relay plate
S232	Fuse in fuse box
S243	Fuse in fuse box
T6l	6-pin connector, brown, in protective housing for connectors, on left in plenum chamber
T14a	14-pin connector, in cable channel left
269	Earth connection (sender earth) -1-, in dash panel wiring harness
A20	Connection (15a), in dash panel wiring harness
A71	Connection (86), in dash panel wiring harness
B168	Connection (86), in interior wiring harness

Wiring Diagram SEAT TOLEDO 2003 - Control unit with display in dash panel insert - oil pressure switch - speedometer sender - oil level/oil temperature sender

F1	Oil pressure switch
F4	Reversing light switch
G22	Speedometer sender
G266	Oil level/oil temperature 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
S7	Fuse in fuse box/relay plate
T10	10-pin connector, orange, in protective housing for connectors, on left in plenum chamber
T14a	14-pin connector, in cable channel left
85	Earth connection -1-, in engine compartment wiring harness
B163	Positive (+) connection -1- (15), in interior wiring harness
*	Only models with maintenance intermittent extension
**	Wire W for self-diagnosis
***	Only models without maintenance intermittent extension

Wiring Diagram SEAT TOLEDO 2003 - 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
J255	Climatronic control unit
J285	Control unit with display in dash panel insert
K29	Glow period warning lamp
K105	Reserve fuel warning lamp
T6d	6-pin connector
T12d	12-pin connector, on Climatronic
A27	Connection (speed signal), in dash panel wiring harness
*	Only models with multi-function display

SEAT TOLEDO 2003 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 TOLEDO 2003 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 TOLEDO 2003 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 TOLEDO 2003 Glow plug activation control unit:

Glow plug activation control unit:

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

 

SEAT TOLEDO 2003 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 TOLEDO 2003 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 TOLEDO 2003 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 Hanki pääsy kaikkiin auton kytkentäkaavioihin 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 Hanki pääsy kaikkiin auton kytkentäkaavioihin SEAT TOLEDO 2003 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 TOLEDO 2003 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 TOLEDO 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 TOLEDO 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 TOLEDO 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 TOLEDO 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 TOLEDO 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 TOLEDO 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 TOLEDO 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