Wiring Diagram SEAT LEON 2003 - Four-wheel drive control unit - haldex coupling pump
| D | Ignition/starter switch |
| J... | Engine control units |
| J104 | ABS control unit with EDL |
| J217 | Automatic gearbox control unit |
| J492 | Four-wheel drive control unit |
| S231 | Fuse on fuse holder |
| V181 | Haldex coupling pump |
| T8q | 8-pin connector, Syncro |
| T10d | 10-pin connector, green, in connector protective housing, on left in plenum chamber |
| |
| |
| 86 | Earth connection 1, in rear wiring harness |
| 219 | Earth connection 2, in rear lid wiring harness |
| A2 | Positive connection (15), in dash panel wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| * | only models with automatic gearbox |
| ** | only Toledo |
| --- | only Leon |
Wiring Diagram SEAT LEON 2003 - Fuel pump - Oil pressure control motor - hydraulic temperature sender - fuel gauge sender - four-wheel drive control unit
| F | Brake light switch |
| G | Fuel gauge sender |
| G6 | Fuel system pressurisation pump |
| G169 | Fuel gauge sender 2 |
| G271 | Hydraulic temperature sender |
| J17 | Fuel pump relay |
| J248 | Diesel direct injection system control unit |
| J317 | Terminal 30 voltage supply relay |
| J492 | Four-wheel drive control unit |
| V184 | Oil pressure control motor |
| T2nb | 2-pin connector, Syncro |
| T9b | 9-pin connector, on additional relay carrier |
| T10d | 10-pin connector, green, in connector protective housing, on left in plenum chamber |
| 269 | Earth connection (sender earth) 1, in dash panel wiring harness |
| 501 | Screw connection 2 (30), on relay plate |
| A32 | Positive connection (30), in dash panel wiring harness |
| A71 | Connection (86), in dash panel wiring harness |
| B131 | Connection (54), in interior wiring harness |
| B429 | Connection (EFPR), in main wiring harness |
Wiring Diagram SEAT LEON 2003 - Handbrake warning switch - dash panel insert - fuel gauge - coolant temperature gauge - handbrake warning lamp
| F9 | Handbrake warning switch |
| G1 | Fuel gauge |
| G2 | Coolant temperature display sender |
| G3 | Coolant temperature gauge |
| J285 | Control unit with display in dash panel insert |
| K14 | Handbrake warning lamp |
| T14a | 14-pin connector, in left wiring harness |
| T16 | 16-pin connector, self-diagnosis |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| |
| 81 | Earth connection 1, in dash panel wiring harness |
| 135 | Earth connection 2, in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| A115 | Connection (handbrake warning), in dash panel wiring harness |
SEAT LEON 2003 Overview of fuses
Overview of fuses | | | | 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: |
SEAT LEON 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 LEON 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 | | 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) | | | | | A - | Seat adjustment fuse -S45- (30 A) | | B - | Vacuum pump fuse (20 A) | | C - | Window regulator fuse -S37- (30 A) | | F - | Alarm horn fuse 1 -S111- (15 A) | | - | Turn signal fuse -S144- (15 A) | | G - | Fuel charging hole fuse -S323- (10 A) | | | | SEAT LEON 2003 Fuse on fuse holder, next to battery (up to August 2000): | Fuse on fuse holder, next to battery (up to August 2000): | | S162 - | Glow plug heater 50 A | | S163 - | Engine control unit 50 A | | S176 - | Passenger compartment, 110A | | S177 - | Alternator (90 A), 110 A | | - | Alternator (120 A), 150 A | | | | SEAT LEON 2003 Fuse on fuse holder, next to battery (from September 2000): | | 
