Wiring Diagram AUDI A6 1999 - Battery - starter - alternator
| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| J31 | Automatic intermittent wash/wipe relay |
| S204 | Fuse C (white) |
| T3aw | 3-pin connector, black, in engine compartment, left |
| T10c | 10-pin connector, grey, connector point, A pillar, left |
| T10o | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T10p | 10-pin connector, black, connector point, electronics box, plenum chamber |
| 1 | Earth strap, battery - body |
| 3 | Earth strap, engine - body |
| 44 | Earth point, lower part of left A-pillar |
| 81 | Earth connection -1-, in dash panel wiring harness |
| 199 | Earth connection -3-, in dash panel wiring harness |
| A17 | Connection (61), in dash panel wiring harness |
| A41 | Positive (+) connection (50), in dash panel wiring harness |
| * | Models with manual gearbox |
| ** | Models with automatic gearbox |
Wiring Diagram AUDI A6 1999 - Starter inhibitor relay
| D | Ignition/starter switch |
| F125 | Multi-function switch |
| J207 | Starter inhibitor relay |
| J220 | Motronic control unit |
| S232 | Fuse in fuse box |
| T9 | 9-pin connector, brown, at starter inhibitor relay |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| T15r | 15-pin connector, brown, connector point, right A pillar |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| B135 | Connection (15a), in interior wiring harness |
| D131 | Connection (15) via fuse 232, in engine compartment wiring harness |
| * | Models with automatic gearbox |
Wiring Diagram AUDI A6 1999 - Injectors - ignition coils cylinder 1- 4
| J220 | Motronic control unit |
| N | Ignition coil |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| N128 | Ignition coil 2 |
| N158 | Ignition coil 3 |
| N163 | Ignition coil 4 |
| P | Spark plug connector |
| Q | Spark plugs |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| D23 | Connection (via fuse 229), in front right wiring harness |
| D131 | Connection (15) via fuse 232, in engine compartment wiring harness |
Wiring Diagram AUDI A6 1999 - Injectors - ignition coils cylinder 5- 8
| J220 | Motronic control unit |
| N83 | Injector, cylinder 5 |
| N84 | Injector, cylinder 6 |
| N85 | Injector, cylinder 7 |
| N86 | Injector, cylinder 8 |
| N164 | Ignition coil 5 |
| N189 | Ignition coil 6 |
| N190 | Ignition coil 7 |
| N191 | Ignition coil 8 |
| P | Spark plug connector |
| Q | Spark plugs |
| 19 | Earth point, near ignition coil |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| D23 | Connection (via fuse 229), in front right wiring harness |
| D131 | Connection (15) via fuse 232, in engine compartment wiring harness |
Wiring Diagram AUDI A6 1999 - Throttle valve control unit - accelerator pedal position senders - cruise control system switch
| E45 | Cruise control system switch |
| G79 | Accelerator pedal position sender |
| G185 | Accelerator pedal position sender -2- |
| G186 | Throttle valve drive (electric throttle operation) |
| G187 | Throttle valve drive angle sender -1- (electric throttle operation) |
| G188 | Throttle valve drive angle sender -2- (electric throttle operation) |
| J220 | Motronic control unit |
| J338 | Throttle valve control unit |
| T15e | 15-pin connector, white, connector point, electronics box, plenum chamber |
| A16 | Connection (cruise control system), in dash panel wiring harness |
| * | Models with cruise control system |
Wiring Diagram AUDI A6 1999 - Secondary air pump relay - secondary air pump motor - activated charcoal filter system solenoid valve 1 (pulsed)
| E87 | Control and display unit for air conditioner |
| J220 | Motronic control unit |
| J299 | Secondary air pump relay |
| N80 | Activated charcoal filter system solenoid valve 1 (pulsed) |
| N112 | Secondary air inlet valve |
| N144 | Electro/hydraulic engine mounting solenoid valve, left |
| N145 | Electro/hydraulic engine mounting solenoid valve, right |
| N156 | Intake manifold change-over valve |
| N261 | Intake manifold change-over valve 2 |
| S130 | Secondary air pump fuse |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| T15u | 15-pin connector, red, connector point, electronics box, plenum chamber |
| V101 | Secondary air pump motor |
| 12 | Earth point, in engine compartment, left |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| A68 | Connection (C15, air conditioner), in dash panel wiring harness |
| D22 | Connection (via fuse 234), in front right wiring harness |
Wiring Diagram AUDI A6 1999 - Lambda probe before catalyst
| E3 | Hazard warning light switch |
| G39 | Lambda probe |
| G108 | Lambda probe 2 |
| J220 | Motronic control unit |
| J234 | Airbag control unit |
| N205 | Inlet camshaft timing adjustment valve -1- |
| N208 | Inlet camshaft timing adjustment valve -2- |
| T3au | 3-pin connector, red, connector point, electronics box, plenum chamber |
| T4u | 4-pin connector, black, for lambda probe 1 |
| T4v | 4-pin connector, black, for lambda probe 2 |
| Z19 | Lambda probe heater |
| Z28 | Lambda probe 2 heater |
| 200 | Earth connection (sender earth), in engine wiring harness |
| D22 | Connection (via fuse 234), in front right wiring harness |
Wiring Diagram AUDI A6 1999 - Air mass meter - lambda probes after catalyst
| G70 | Air mass meter |
| G130 | Lambda probe after catalyst |
| G131 | Lambda probe 2 after catalyst |
| J220 | Motronic control unit |
| T4s | 4-pin connector, green, for lambda probe 1 after catalyst |
| T4t | 4-pin connector, brown, for lambda probe 2 after catalyst |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| Z29 | Lambda probe 1 heater, after catalyst |
| Z30 | Lambda probe 2 heater, after catalyst |
| 200 | Earth connection (sender earth), in engine wiring harness |
| D22 | Connection (via fuse 234), in front right wiring harness |
| * | Models with Lambda probe after catalyst |
Wiring Diagram AUDI A6 1999 - Fuel pump relay - Hall sender - temperature sender
| F66 | Coolant shortage indicator switch |
| G2 | Coolant temperature sender |
| G40 | Hall sender |
| G62 | Coolant temperature sender |
| G163 | Hall sender 2 |
| J17 | Fuel pump relay |
| J220 | Motronic control unit |
| S228 | Fuse 28 in fuse box |
| S229 | Fuse in fuse box |
| S234 | Fuse in fuse box |
| T10p | 10-pin connector, black, connector point, electronics box, plenum chamber |
| 139 | Earth connection (sender earth), in Motronic wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| E16 | Positive (+) connection (5 volts), in Motronic wiring harness |
Wiring Diagram AUDI A6 1999 - Knock sensors - engine speed sender
| E87 | Control and display unit for air conditioner |
| F36 | Clutch pedal switch |
| G28 | Engine speed sender |
| G61 | Knock sensor 1 |
| G66 | Knock sensor 2 |
| J220 | Motronic control unit |
| T3k | 3-pin connector, grey, on engines speed sender |
| T3bc | 3-pin connector, green, at knock sensor 1 |
| T3bd | 3-pin connector, green, at knock sensor 2 |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| T10o | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T15e | 15-pin connector, white, connector point, electronics box, plenum chamber |
| 220 | Earth connection (sender earth), in engine wiring harness |
| A79 | Connection (hot light switch), in dash panel wiring harness |
| D102 | Connection -2-, in engine compartment wiring harness |
| * | Models with manual gearbox |
Wiring Diagram AUDI A6 1999 - Brake light switch - cruise control system brake pedal switch
| F | Brake light switch |
| F47 | Cruise control system brake pedal switch (diesel direct injection system) |
| J217 | Automatic gearbox control unit |
| J220 | Motronic control unit |
| M9 | Brake light bulb, left |
| M10 | Brake light bulb, right |
| S7 | Fuse in fuse box |
| S13 | Fuse in fuse box |
| T10o | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T15e | 15-pin connector, white, connector point, electronics box, plenum chamber |
| T15r | 15-pin connector, brown, connector point, right A pillar |
| T15u | 15-pin connector, red, connector point, electronics box, plenum chamber |
| A18 | Connection (54), in dash panel wiring harness |
| A52 | Positive (+) connection 2 (30), in dash panel wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| B131 | Connection (54), in interior wiring harness |
| J9 | Connection -1- (15a), in ABS wiring harness |
| • | CAN bus (data wire) |
| * | Models with automatic gearbox |
Wiring Diagram AUDI A6 1999 - Oil level thermo sender - fuel system diagnostic pump
| G266 | Oil level sender, service interval |
| J220 | Motronic control unit |
| S5 | Fuse in fuse box |
| T6f | 6-pin connector, dark brown, connector point, A pillar, right |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| T10o | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T10p | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T15u | 15-pin connector, red, connector point, electronics box, plenum chamber |
| V144 | Fuel system diagnostic pump |
| 12 | Earth point, in engine compartment, left |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| A20 | Connection (15a), in dash panel wiring harness |
| * | Models with fuel system diagnostic pump |
Wiring Diagram AUDI A6 1999 - Engine cooling
| E87 | Control and display unit for air conditioner |
| F18 | Radiator fan thermo-switch |
| F54 | Radiator fan thermo-switch |
| F129 | Air conditioner pressure switch |
| J293 | Radiator fan control unit |
| S42 | Radiator fan single fuse |
| S142 | Radiator fan control unit fuse |
| S225 | Fuse 25 in fuse box |
| T2by | 2-pin connector, on radiator fan control unit |
| T6ao | 6-pin connector, on radiator fan control unit |
| T10c | 10-pin connector, grey, connector point, A pillar, left |
| V7 | Radiator fan |
| 193 | Earth connection -1-, in coolant fan wiring harness |
| L4 | Connection (75 al), in air conditioner wiring harness |
| L39 | Connection (air conditioner pressure switch) -1-, in Climatronic wiring harness |
| * | Models with air conditioner |
Wiring Diagram AUDI A6 1999 - Dash panel insert - fuel pump
| G | Fuel gauge sender |
| G1 | Fuel gauge |
| G5 | Rev. counter |
| G6 | Fuel pump (pre-supply pump) |
| G169 | Fuel gauge sender 2 |
| G237 | Fuel gauge sender 3 |
| J218 | Combi-processor in dash panel insert |
| K | Diagnosis connection |
| K2 | Alternator warning lamp |
| K132 | Electronic power control fault lamp |
| T6a | 6-pin connector, blue, connector point, A pillar, left |
| T10f | 10-pin connector, brown, connector point, A pillar, left |
| T16a | 16-pin connector, diagnosis connection |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| 86 | Earth connection -1-, in rear wiring harness |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| A45 | Connection (engine speed signal), in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| * | Models with front-wheel drive |
| ** | Models with four-wheel drive |
| *** | Wiring in fuel tank |
| # | Sender earth output |
Wiring Diagram AUDI A6 1999 - Dash panel insert - speedometer - oil pressure warning lamp - coolant temperature/coolant shortage warning lamp
| F1 | Oil pressure switch |
| F66 | Coolant shortage indicator switch |
| G3 | Coolant temperature gauge |
| G21 | Speedometer |
| G22 | Speedometer sender (Hall sender, on gearbox) |
| J218 | Combi-processor in dash panel insert |
| K3 | Oil pressure warning lamp |
| K28 | Coolant temperature/coolant shortage warning lamp |
| T10p | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| 135 | Earth connection -2-, in dash panel wiring harness |
| 139 | Earth connection (sender earth), in Motronic wiring harness |
| 199 | Earth connection -3-, in dash panel wiring harness |
| A108 | Connection (speed signal), in dash panel wiring harness |
| * | Both possible |
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