Wiring Diagram AUDI A2 2003 - Battery - starter - alternator - ignition/starter switch
| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| S88 | Strip fuse |
| T17e | 17-pin connector, blue, in footwell, front left |
| 65 | Earth point, left longitudinal member, rear, between B and C pillar |
| 500 | Screw connection -1- (30), on relay plate |
| 501 | Screw connection -2- (30), on relay plate |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| P2 | Positive (+) connection (30), in battery wiring harness |
| * | Only applies to models with electric additional heater (PTC 1500 W) |
Wiring Diagram AUDI A2 2003 - Additional heater fuse - fuses on fuse box
| S126 | Additional heater fuse |
| SB14 | Fuse -14- on fuse box |
| SB30 | Fuse -30- on fuse box |
| SB31 | Fuse -31- on fuse box |
| SB38 | Fuse -38- on fuse box |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| A98 | Positive (+) connection -4- (30), in dash panel wiring harness |
| * | Only applies to models with fuel-burning additional heater |
| ** | Only applies to models with electric additional heater (PTC 900 W) |
| *** | Will be no longer fitted as of the introduction of the electric additional heater (PTC 1500 W), phased-in modification |
| **** | 20 A - for models with fuel-burning additional heater |
| 30 A - for models with electric additional heater (PTC 900 W) |
Wiring Diagram AUDI A2 2003 - Relay for glow plugs - diesel direct injection system control unit - terminal 30 voltage supply relay - glow plugs - (engine)
| J52 | Glow plug relay |
| J248 | Diesel direct injection system control unit |
| J317 | Terminal 30 voltage supply relay |
| Q6 | Glow plugs - (engine) |
| S39 | Strip fuse for glow plugs - engine |
| T17 | 17-pin connector, brown, in footwell, front left |
| 12 | Earth point, in engine compartment, left |
| 44 | Earth point, lower part of left A pillar |
| 249 | Earth connection -2-, in interior wiring harness |
| 277 | Earth connection -3-, in interior wiring harness |
| 284 | Earth connection -6-, in interior wiring harness |
| D16 | Connection (glow plugs), in front right wiring harness |
Wiring Diagram AUDI A2 2003 - Kick-down switch - idling switch - coolant temperature senders - accelerator pedal position sender - diesel direct injection system control unit
| F8 | Kick-down switch |
| F60 | Idling switch |
| G2 | Coolant temperature sender |
| G62 | Coolant temperature sender |
| G79 | Accelerator pedal position sender |
| J248 | Diesel direct injection system control unit |
| T17 | 17-pin connector, brown, in footwell, front left |
| T17d | 17-pin connector, green, in footwell, front left |
| T17e | 17-pin connector, blue, in footwell, front left |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| B508 | Connection (DF), in interior wiring harness |
| * | Only applies to models with electric additional heater (PTC 1500 W) |
| ** | Only applies to models with fuel-burning additional heater |
| *** | Only applies to models with electric additional heater (PTC 900 W) |
| **** | Will be no longer fitted as of the introduction of the electric additional heater (PTC 1500 W), phased-in modification |
Wiring Diagram AUDI A2 2003 - Cruise control system switch - fuel temperature sender - airbag control unit - diesel direct injection system control unit
| E45 | Cruise control system switch |
| G81 | Fuel temperature sender |
| J234 | Airbag control unit |
| J248 | Diesel direct injection system control unit |
| T10n | 10-pin connector, black, behind steering column switch trim |
| T10s | 10-pin connector, white, in footwell, front left |
| T17 | 17-pin connector, brown, in footwell, front left |
| T17d | 17-pin connector, green, in footwell, front left |
| T17e | 17-pin connector, blue, in footwell, front left |
| A16 | Connection (cruise control system), in dash panel wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| A125 | Connection (crash signal), in dash panel wiring harness |
| * | Only applies to models with cruise control system |
Wiring Diagram AUDI A2 2003 - Diesel direct injection system control unit - heater element (crankcase breather) - unit injector solenoid valves
| J248 | Diesel direct injection system control unit |
| N79 | Heater element (crankcase breather) |
| N240 | Unit injector solenoid valve, No. 1 cylinder |
| N241 | Unit injector solenoid valve, No. 2 cylinder |
| N242 | Unit injector solenoid valve, No. 3 cylinder |
| T8b | 8-pin connector, black, at unit injector solenoid valves |
| T17d | 17-pin connector, green, in footwell, front left |
| 12 | Earth point, in engine compartment, left |
| B149 | Positive (+) connection -2- (15a), in interior wiring harness |
| F26 | Connection -2-, in diesel direct injection system wiring harness |
| * | Only applies to models with electric additional heater (PTC 1500 W) |
| ** | Only applies to models with electric additional heater (PTC 900 W) |
| *** | Will be no longer fitted as of the introduction of the electric additional heater (PTC 1500 W), phased-in modification |
| **** | Only applies to models with cruise control system |
| ***** | Only applies to models with heater element (crankcase breather) |
Wiring Diagram AUDI A2 2003 - Air mass meter - intake manifold pressure sender - intake manifold temperature sender - diesel direct injection system control unit
| G70 | Air mass meter |
| G71 | Intake manifold pressure sender |
| G72 | Intake manifold temperature sender |
| J248 | Diesel direct injection system control unit |
| T17d | 17-pin connector, green, in footwell, front left |
| T17h | 17-pin connector, green, connector point, A pillar, right |
Wiring Diagram AUDI A2 2003 - Clutch pedal switch - Hall sender - exhaust gas recirculation valve - charge pressure control solenoid valve - throttle butterfly valve - engine control unit fuse
| F36 | Clutch pedal switch |
| G40 | Hall sender |
| J248 | Diesel direct injection system control unit |
| N18 | Exhaust gas recirculation valve |
| N75 | Charge pressure control solenoid valve |
| N211 | Throttle butterfly valve |
| S102 | Engine control unit fuse |
| T17 | 17-pin connector, brown, in footwell, front left |
| T17d | 17-pin connector, green, in footwell, front left |
| T17h | 17-pin connector, green, connector point, A pillar, right |
| C33 | Connection -5-, in headlight wiring harness |
Wiring Diagram AUDI A2 2003 - Air conditioning system/Climatronic operating and display unit - additional heating button (ECON) - brake light switch - engine speed sender
| E87 | Air conditioning system/Climatronic operating and display unit |
| E288 | Additional heating button (ECON) |
| F | Brake light switch |
| G28 | Engine speed sender |
| J248 | Diesel direct injection system control unit |
| N280 | Air conditioning system compressor regulating valve |
| T16h | 16-pin connector, black, on heater controls |
| T17 | 17-pin connector, brown, in footwell, front left |
| T17e | 17-pin connector, blue, in footwell, front left |
| 277 | Earth connection -3-, in interior wiring harness |
| B131 | Connection (54), in interior wiring harness |
| F27 | Connection (screening), in diesel direct injection system wiring harness |
| * | Only applies to models with fuel-burning additional heater |
| ** | Only applies to models with electric additional heater (PTC 900 W) |
| *** | Will be no longer fitted as of the introduction of the electric additional heater (PTC 1500 W), phased-in modification |
| **** | Only applies to models with air conditioning system |
Wiring Diagram AUDI A2 2003 - Heater control unit - glow plug with flame monitor - combustion air blower - metering pump
| J162 | Heater control unit |
| J248 | Diesel direct injection system control unit |
| Q8 | Glow plug with flame monitor |
| T2l | 2-pin connector, black, on heater control unit |
| T6h | 6-pin connector, black, on heater control unit |
| T17 | 17-pin connector, brown, in footwell, front left |
| T17h | 17-pin connector, green, connector point, A pillar, right |
| V6 | Combustion air blower |
| V54 | Metering pump |
| 43 | Earth point, lower part of right A pillar |
| 176 | Earth connection, in right headlight wiring harness |
| 249 | Earth connection -2-, in interior wiring harness |
| * | Only applies to models with fuel-burning additional heater |
| ** | Will be no longer fitted as of the introduction of the electric additional heater (PTC 1500 W), phased-in modification |
Wiring Diagram AUDI A2 2003 - Low heat output relay - high heat output relay - additional air heater control unit - additional heating heater element
| J248 | Diesel direct injection system control unit |
| J359 | Low heat output relay |
| J360 | High heat output relay |
| J604 | Additional air heater control unit |
| T3c | 3-pin connector, black, behind driver's storage compartment |
| T6i | 6-pin connector, black, on additional air heater control unit (PTC 1500 W) |
| T17 | 17-pin connector, brown, in footwell, front left |
| T17d | 17-pin connector, green, in footwell, front left |
| Z35 | Additional heating heater element |
| 43 | Earth point, lower part of right A pillar |
| 249 | Earth connection -2-, in interior wiring harness |
| B217 | Connection (additional heater), in interior wiring harness |
| * | Only applies to models with electric additional heater (PTC 1500 W) |
| ** | Only applies to models with electric additional heater (PTC 900 W) |
| *** | Will be no longer fitted as of the introduction of the electric additional heater (PTC 1500 W), phased-in modification |
Wiring Diagram AUDI A2 2003 - Oil pressure switch - oil level/oil temperature sender - control unit with display in dash panel insert
| F1 | Oil pressure switch |
| G | Fuel gauge sender |
| G1 | Fuel gauge |
| G9 | Oil temperature gauge |
| G266 | Oil level/oil temperature sender |
| J285 | Control unit with display in dash panel insert |
| J293 | Radiator fan control unit |
| K2 | Alternator warning lamp |
| K132 | Electronic power control fault lamp |
| T6g | 6-pin connector, black, on radiator fan control unit |
| T10f | 10-pin connector, blue, connector point, A pillar, left |
| T17 | 17-pin connector, brown, in footwell, front left |
| T17e | 17-pin connector, blue, in footwell, front left |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| 12 | Earth point, in engine compartment, left |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| B135 | Connection -1- (15a), in interior wiring harness |
| B177 | Connection (61), in interior wiring harness |
| * | Only applies to models with air conditioning system |
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