Wiring Diagram SEAT LEON 2002 - 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 | Lighting switch |
| J59 | X contact relief relay |
| S162 | Fuse -1- (30), in battery fuse box |
| S163 | Fuse -2- (30), in battery fuse box |
| S176 | Fuse -4- (30), in battery fuse box |
| S177 | Fuse -5- (30), in battery fuse box |
| S229 | Fuse in fuse box |
| T2k | 2-pin connector, on engine |
| T4l | 4-pin connector, on engine |
| T6l | 6-pin connector, brown, in protective housing for connectors, in plenum chamber, left |
| T17 | 17-pin connector, lighting switch |
| 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 |
Wiring Diagram SEAT LEON 2002 - 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 | Relay for glow plugs |
| 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, in plenum chamber, left |
| T6m | 6-pin connector, on accelerator pedal |
| T10d | 10-pin connector, green, in protective housing for connectors, in plenum chamber, left |
| T10h | 10-pin connector, blue, in protective housing for connectors, in plenum chamber, left |
| T14 | 14-pin connector |
| T121 | 121-pin connector |
| 504 | Screw connection -1- (87F), on relay plate |
| A104 | Positive (+) connection -2- (15), in dash panel wiring harness |
| F31 | Connection (glow plugs - engine), in diesel direct injection system wiring harness |
| * | Only models with air conditioner |
| ** | Only models with Climatronic |
Wiring Diagram SEAT LEON 2002 - Diesel direct injection system control unit - coolant temperature gauge sender - engine speed sender - intake manifold pressure sender
| 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 |
| S10 | Fuse in fuse box/relay plate |
| 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, in plenum chamber, left |
| T14a | 14-pin connector, in cable channel left |
| T121 | 121-pin connector |
| 200 | Earth connection (screening), in engine compartment wiring harness |
| A80 | Connection -1- (X), in dash panel wiring harness |
| * | Only models up to October 2001 |
| ** | Only models from November 2001 |
Wiring Diagram SEAT LEON 2002 - Diesel direct injection control unit - fuel temperature sender - slide travel sender - fuel shut-off valve - metering adjuster
| E35 | AC switch |
| G81 | Fuel temperature sender (00539-2311) |
| G149 | Slide travel sender (00765-1412) |
| J248 | Diesel direct injection control unit |
| J255 | Climatronic control unit (01320) |
| J293 | Radiator fan control unit (00831) |
| N109 | Fuel shut-off valve (01237-4321) |
| N146 | Metering adjuster (01268-4113) |
| T8l | 8-pin connector |
| T10 | 10-pin connector, orange, on connector protective housing, in plenum chamber, left side |
| T10d | 10-pin connector, green, on connector protective housing, in plenum chamber, left side |
| T10y | 10-pin connector, on engine, front |
| T12e | 12-pin connector |
| T14 | 14-pin connector |
| T16b | 16-pin connector |
| T121 | 121-pin connector |
| F25 | Connection -1-, in diesel direct injection unit wiring harness |
| * | Only vehicles with M.F.A. |
| ** | Self-diagnosis W line |
Wiring Diagram SEAT LEON 2002 - Diesel direct injection control unit - air flow meter - exhaust gas recirculation valve - charge pressure control solenoid valve
| G70 | Air flow meter (00553-2324) |
| J104 | ABS with EDL control unit |
| J248 | Diesel direct injection control unit |
| N18 | Exhaust gas recirculation valve (01265-4312) |
| N75 | Charge pressure control solenoid valve (01262-4442) |
| N108 | Injection commencement valve (01269-4114) |
| N239 | Intake manifold flap switch-over valve (01282) |
| S234 | Fuse in fuse box |
| T6l | 6-pin connector, brown, on connector protective housing, in plenum chamber, left side |
| T10d | 10-pin connector, green, on connector protective housing, in plenum chamber, left side |
| T10y | 10-pin connector, on engine, front |
| T14a | 14-pin connector, on wiring channel, left side |
| T25 | 25-pin connector |
| T47 | 47-pin connector |
| T121 | 121-pin connector |
| A100 | Connection -2- (87), in dash panel wiring harness |
| E30 | Connection (87a), in engine wiring harness |
Wiring Diagram SEAT LEON 2002 - Diesel direct injection control unit - CCS switch - CCS button (set) - brake light switch - clutch pedal switch
| E45 | CCS switch (00671) |
| E227 | CCS button (SET) |
| F | Brake light switch (00526-2131) |
| F36 | Clutch pedal switch (00650) |
| F47 | CCS brake pedal switch/diesel direct injection system (00629) |
| J248 | Diesel direct injection control unit |
| M21 | Brake and tail light bulb, left |
| S13 | Fuses in fuse box/relay plate |
| T10d | 10-pin connector, green, on connector protective housing, in plenum chamber, left side |
| T10e | 10-pin connector, black, on connector protective housing, in plenum chamber, left side |
| T10s | 10-pin connector, next to steering column, right side |
| T121 | 121-pin connector |
| 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 |
| * | Only vehicles with manual gearbox |
| ** | Only vehicles with automatic gearbox |
Wiring Diagram SEAT LEON 2002 - Diesel direct injection control unit - low heat output relay - high heat output relay - coolant heater element
| J248 | Diesel direct injection control unit |
| J359 | Low heat output relay (01193) |
| J360 | High heat output relay (01194) |
| N79 | Heater element (crankcase breather) |
| Q7 | Coolant heater element |
| T6l | 6-pin connector, brown, on connector protective housing, in plenum chamber, left side |
| T10 | 10-pin connector, orange, on connector protective housing, in plenum chamber, left side |
| T121 | 121-pin connector |
| 10 | Earth point, in plenum chamber |
| 156 | Earth connection, in diesel direct injection wiring harness |
| A27 | Connection (speed signal), in dash panel 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 vehicles with additional heater |
Wiring Diagram SEAT LEON 2002 - Fuel gauge sender - coolant shortage indicator sender
| G | Fuel gauge sender (00771-3113) |
| G32 | Coolant shortage indicator sender |
| S5 | Fuses in fuse box/relay plate |
| S232 | Fuse in fuse box |
| S243 | Fuse in fuse box |
| T6l | 6-pin connector, brown, on connector protective housing, in plenum chamber, left side |
| T14a | 14-pin connector, on wiring channel, left side |
| 269 | Earth connection (electronic 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 LEON 2002 - Control unit with display on dash panel insert - oil pressure switch - speedometer sender - oil pressure warning buzzer - anti-theft alarm/rodent repellent system contact switch - oil level/temperature sender
| F1 | Oil pressure switch |
| F120 | Anti-theft alarm/rodent repellent system contact switch |
| G22 | Speedometer sender (01086) |
| G266 | Oil level/temperature sender (00562) |
| H11 | Oil pressure warning buzzer |
| J285 | Control unit with display on dash panel insert (01317) |
| K2 | Alternator warning lamp |
| K3 | Oil pressure warning lamp (00755) |
| K28 | Coolant temperature/shortage warning lamp |
| K83 | Exhaust emissions warning lamp |
| S7 | Fuses in fuse box/relay plate |
| T14a | 14-pin connector, on wiring channel, left side |
| T32 | 32-pin connector, blue, in dash panel insert |
| T32a | 32-pin connector, green, in dash panel insert |
| 10 | Earth point, in plenum chamber |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| 179 | Earth connection, in left headlight wiring harness |
| B163 | Positive connection -1- (15), in interior wiring harness |
| * | Only vehicles with WIV |
| ** | Self-diagnosis W line |
Wiring Diagram SEAT LEON 2002 - 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 |
| T16b | 16-pin connector |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, on dash panel insert |
| A27 | Connection (speed signal), in dash panel wiring harness |
| * | Only models with multi-function display |
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