| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| F18 | Radiator fan thermo-switch |
| J59 | X contact relief relay |
| S162 | Fuse -1- (30), in fuse box/battery |
| S163 | Fuse -2- (30), in fuse box/battery |
| S179 | Fuse -7- (30), in fuse box/battery |
| T3c | 3-pin connector |
| T4g | 4-pin connector, black |
| T5 | 5-pin connector |
| T10d | 10-pin connector, red, connector point under relay carrier |
| T10s | 10-pin connector, light green, connector point under relay carrier |
| V7 | Radiator fan |
| 1 | Earth strap, battery - body |
| 12 | Earth point, in engine compartment, left |
| 167 | Earth connection -4-, in engine compartment wiring harness |
| 500 | Screw connection -1- (30), on relay plate |
| 501 | Screw connection -2- (30), on relay plate |
| 502 | Screw connection -3- (30), on relay plate |
| D | Ignition/starter switch |
| G28 | Engine speed sender |
| J448 | 4CV control unit (injection system), in plenum chamber, centre |
| N152 | Ignition transformer |
| P | Spark plug connector |
| Q | Spark plugs |
| SB28 | Fuse -28- in fuse box |
| SB34 | Fuse -34- in fuse box |
| T4b | 4-pin connector, black |
| T5h | 5-pin connector, black, on cylinder head, left |
| T10g | 10-pin connector, brown, connector point under relay carrier |
| T10s | 10-pin connector, light green, connector point under relay carrier |
| T14 | 14-pin connector, black, on cylinder head, left |
| T14a | 14-pin connector, brown, on cylinder head, left |
| T80 | 80-pin connector |
| 12 | Earth point, in engine compartment, left |
| 281 | Earth connection -1-, in engine prewiring wiring harness |
| B163 | Positive (+) connection -1- (15), in interior wiring harness |
| B165 | Positive (+) connection -2- (15), in interior wiring harness |
| B149 | Positive (+) connection -2- (15a), in interior wiring harness |
| D101 | Connection -1-, in engine wiring harness |
| F60 | Idling switch |
| G42 | Intake air temperature sender |
| G65 | High pressure sender |
| G69 | Throttle valve potentiometer |
| G71 | Intake manifold pressure sender |
| G88 | Throttle valve positioner potentiometer |
| J255 | Climatronic control unit |
| J293 | Radiator fan control unit |
| J338 | Throttle valve control unit |
| J448 | 4CV control unit (injection system) |
| T8h | 8-pin connector, black |
| T10g | 10-pin connector, brown, connector point under relay carrier |
| T14 | 14-pin connector, black, on cylinder head, left |
| T14a | 14-pin connector, brown, on cylinder head, left |
| T80 | 80-pin connector |
| V60 | Throttle valve positioner |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| 281 | Earth connection -1-, in engine prewiring wiring harness |
| L2 | Connection, in air conditioner wiring harness |
| L9 | Connection -1-, in air conditioner wiring harness |
| L10 | Connection -2-, in air conditioner wiring harness |
| * | Only models with manual control air conditioner |
| ** | Only models with Climatronic |
| G2 | Coolant temperature sender |
| G40 | Hall sender |
| G62 | Coolant temperature sender |
| J293 | Radiator fan control unit |
| J448 | 4CV control unit (injection system) |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| N79 | Heater element (crankcase breather) |
| SB3 | Fuse -3- in fuse box |
| T3 | 3-pin connector, on cylinder head, left |
| T5h | 5-pin connector, on cylinder head, left |
| T10a | 10-pin connector, green, connector point under relay carrier |
| T14 | 14-pin connector, black, on cylinder head, left |
| T14a | 14-pin connector, brown, on cylinder head, left |
| T80 | 80-pin connector |
| 12 | Earth point, in engine compartment, left |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| 281 | Earth connection -1-, in engine prewiring wiring harness |
| D95 | Connection (injectors), in engine compartment wiring harness |
| * | Only models with air conditioner |
| --- | From December 2000 |
| G39 | Lambda probe |
| J104 | ABS with EDL control unit |
| J362 | Immobilizer control unit |
| J448 | 4CV control unit (injection system) |
| N18 | Exhaust gas recirculation valve |
| N80 | Activated charcoal filter system solenoid valve 1 |
| SB30 | Fuse -30- in fuse box |
| T4f | 4-pin connector, black |
| T5h | 5-pin connector, black, on cylinder head, left |
| T10 | 10-pin connector, white, connector point under relay carrier |
| T10a | 10-pin connector, green, connector point under relay carrier |
| T10b | 10-pin connector, black, connector point under relay carrier |
| T14a | 14-pin connector, brown, on cylinder head, left |
| T25 | 25-pin connector |
| T80 | 80-pin connector |
| Z19 | Lambda probe heater |
| D52 | Positive (+) connection (15a), in engine compartment wiring harness |
| D159 | Connection (high bus), in engine compartment wiring harness |
| D160 | Connection (low bus), in engine compartment wiring harness |
| G61 | Knock sensor I |
| J17 | Fuel pump relay |
| J234 | Airbag control unit |
| J448 | 4CV control unit (injection system) |
| SB37 | Fuse -37- in fuse box |
| T2 | 2-pin connector, black |
| T10a | 10-pin connector, green, connector point under relay carrier |
| T10d | 10-pin connector, red, connector point under relay carrier |
| T10g | 10-pin connector, brown, connector point under relay carrier |
| T10x | 10-pin connector, yellow, connector point under relay carrier |
| T14 | 14-pin connector, black, on cylinder head, left |
| T80 | 80-pin connector |
| W | Interior light, front |
| 76 | Earth point, near selector mechanism |
| 200 | Earth connection (screening), in engine compartment wiring harness |
| A125 | Connection (crash signal), in dash panel wiring harness |
| B102 | Earth connection, in front left interior wiring harness |
| B111 | Positive (+) connection -1- (30a), in interior wiring harness |
| B150 | Positive (+) connection -2- (30a), in interior wiring harness |
| J362 | Immobilizer control unit |
| G | Fuel gauge sender |
| G6 | Fuel pump |
| G22 | Speedometer sender (hall sender, on gearbox) |
| G32 | Coolant shortage indicator sender |
| SB1 | Fuse -1- in fuse box |
| SB40 | Fuse -40- in fuse box |
| T5h | 5-pin connector, black, on cylinder head, left |
| T10b | 10-pin connector, black, connector point under relay carrier |
| T10c | 10-pin connector, blue, connector point under relay carrier |
| T10d | 10-pin connector, red, connector point under relay carrier |
| T10e | 10-pin connector, pink, connector point under relay carrier |
| T10g | 10-pin connector, brown, connector point under relay carrier |
| T14 | 14-pin connector, black, on cylinder head, left |
| T14a | 14-pin connector, brown, on cylinder head, left |
| 10 | Earth point, in plenum chamber |
| 201 | Earth connection -5-, in engine compartment wiring harness |
| 283 | Earth connection -2-, in engine prewiring wiring harness |
| A99 | Connection -1- (87), in dash panel wiring harness |
| B102 | Earth connection, in interior wiring harness, front left |
| B149 | Positive (+) connection -2- (15a), in interior wiring harness |
| F1 | Oil pressure switch |
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G5 | Rev. counter |
| 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/coolant shortage warning lamp |
| K105 | Reserve fuel warning lamp |
| T10 | 10-pin connector, white, connector point under relay carrier |
| T10d | 10-pin connector, red, connector point under relay carrier |
| T14 | 14-pin connector, black, on cylinder head, left |
| T32 | 32-pin connector, blue |
| A27 | Connection (speed signal), in dash panel wiring harness |
| J285 | Control unit with display in dash panel insert |
| J362 | Immobilizer control unit |
| J533 | Data bus diagnostic interface control unit |
| T10s | 10-pin connector, light green, connector point under relay carrier |
| T16 | 16-pin connector, self-diagnosis connection |
| T32 | 32-pin connector, green |
| T32a | 32-pin connector, blue |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
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