Wiring Diagram AUDI TT 2002 - Battery - starter - alternator - main fuse box/battery
| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| F18 | Radiator fan thermo-switch |
| S131 | Fuse 1 |
| S132 | Fuse 2 |
| S133 | Fuse 3 |
| S134 | Fuse 4 |
| S138 | Fuse 5 |
| S164 | Fuse -3- (30), in fuse box/battery |
| T2f | 2-pin connector, wiring duct, in engine compartment, left |
| T3e | 3-pin connector, black, on main fuse box/battery |
| T4b | 4-pin connector, in engine compartment, left |
| T6m | 6-pin connector, brown, in plenum chamber |
| 1 | Earth strap, battery - body |
| 2 | Earth strap, gearbox - body |
| A68 | Connection (30, air conditioner), in dash panel wiring harness |
| * | Models with manual heater controls |
| ** | Models with air conditioner |
| *** | Only applies to engine code BAM |
Wiring Diagram AUDI TT 2002 - Motronic control unit - fuel pump relay - brake light switch - clutch pedal switch
| C10 | Suppression filter |
| D | Ignition/starter switch |
| F | Brake light switch |
| F2 | Door contact switch, driver's side |
| F36 | Clutch pedal switch |
| F47 | Cruise control system brake pedal switch |
| J17 | Fuel pump relay |
| J220 | Motronic control unit |
| M9 | Brake light bulb, left |
| S5 | Fuse in fuse box |
| S13 | Fuse in fuse box |
| T6m | 6-pin connector, brown, in plenum chamber |
| T10a | 10-pin connector, white, in plenum chamber |
| T10e | 10-pin connector, black, in plenum chamber |
| 277 | Earth connection -3-, in interior wiring harness, behind dash panel |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A86 | Connection (50a), in dash panel wiring harness |
| B131 | Connection (54), in interior wiring harness |
| B135 | Connection (15a), in interior wiring harness |
| B154 | Connection -1- (TK (door contact)), in interior wiring harness |
| B185 | Connection -2- (54), in interior wiring harness |
| * | Up to 10.2001 |
| ** | From 11.2001 onwards |
Wiring Diagram AUDI TT 2002 - Motronic control unit - power assisted steering pressure switch - cruise control system - accelerator pedal position senders
| C22 | Interference suppression choke for airbag |
| E3 | Hazard warning light switch |
| E45 | Cruise control system switch |
| F88 | Power assisted steering pressure switch |
| G79 | Accelerator pedal position sender |
| G185 | Accelerator pedal position sender -2- |
| G235 | Exhaust gas temperature sender -1- |
| J220 | Motronic control unit |
| J234 | Airbag control unit |
| J429 | Central locking control unit |
| T10a | 10-pin connector, white, in plenum chamber |
| T10e | 10-pin connector, black, in plenum chamber |
| T10g | 10-pin connector, blue, in plenum chamber |
| T10ae | 10-pin connector, on cruise control system switch |
| 132 | Earth connection -3-, in engine compartment wiring harness |
| A125 | Connection (crash signal), in dash panel wiring harness |
| B135 | Connection (15a), in interior wiring harness |
| * | Models with cruise control system |
| ** | Only applies to engine codes ARY, AUQ and AUM |
| *** | Only applies to engine code BAM |
Wiring Diagram AUDI TT 2002 - Motronic control unit - secondary air pump - lambda probe - air mass meter - activated charcoal filter system solenoid valve
| G39 | Lambda probe |
| G70 | Air mass meter |
| G130 | Lambda probe downstream of catalytic converter |
| J220 | Motronic control unit |
| J299 | Secondary air pump relay |
| N80 | Activated charcoal filter system solenoid valve 1 (pulsed) |
| N112 | Secondary air inlet valve |
| S130 | Secondary air pump fuse |
| T4g | 4-pin connector, in engine compartment, right, for lambda probe downstream of catalytic converter |
| T6m | 6-pin connector, brown, in plenum chamber |
| T6q | 6-pin connector, in engine compartment, right, for lambda probe |
| T10a | 10-pin connector, white, in plenum chamber |
| V101 | Secondary air pump motor |
| Z19 | Lambda probe heater |
| Z29 | Lambda probe heater, downstream of catalytic converter |
| 12 | Earth point, in engine compartment, left |
| D50 | Positive (+) connection (30), in engine compartment wiring harness |
| D80 | Positive (+) connection (87a - for activated charcoal filter system solenoid valve), in engine compartment wiring harness |
| * | Only applies to engine codes ARY, AUQ and AUM |
| ** | Only applies to engine code BAM |
Wiring Diagram AUDI TT 2002 - Motronic control unit - four-wheel drive control unit - charge pressure control solenoid valve - turbocharger divert air valve
| J220 | Motronic control unit |
| J492 | Four-wheel drive control unit |
| N75 | Charge pressure control solenoid valve |
| N205 | Inlet camshaft timing adjustment valve -1- |
| N249 | Turbocharger divert air valve |
| S10 | Fuse in fuse box |
| S231 | Fuse 31 in fuse box |
| S237 | Fuse 37 in fuse box |
| T6m | 6-pin connector, brown, in plenum chamber |
| T8d | 8-pin connector, on four-wheel drive control unit |
| 238 | Earth connection -1-, in interior wiring harness, near luggage compartment light |
| A98 | Positive (+) connection -4- (30), in dash panel wiring harness |
| B156 | Positive (+) connection -4- (30), in interior wiring harness |
| D22 | Connection (via fuse 234), in front right wiring harness |
| D78 | Positive (+) connection -1- (30a), in engine compartment wiring harness |
| • | CAN bus (data wire) |
| * | Engine codes ARY, AUM and AUQ |
| ** | Engine code BAM |
| # | Up to 10.2001 |
| ## | From 11.2001 onwards |
Wiring Diagram AUDI TT 2002 - Motronic control unit - engine speed sender - charge air pressure sender - Hall sender - knock sensor 1
| G28 | Engine speed sender |
| G31 | Charge air pressure sender |
| G61 | Knock sensor 1 |
| G163 | Hall sender |
| J104 | ABS with EDL control unit |
| J220 | Motronic control unit |
| T3c | 3-pin connector, brown, in engine compartment |
| T3d | 3-pin connector, grey, in engine compartment |
| T10a | 10-pin connector, white, in plenum chamber |
| 220 | Earth connection (sender earth), in engine wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| D101 | Connection -1-, in engine compartment wiring harness |
| D141 | Connection (5V), in engine wiring harness |
| • | CAN bus (data wire) |
| * | ABS with ESP (MK 20) |
| ** | ABS with ESP (MK 60) |
Wiring Diagram AUDI TT 2002 - Motronic control unit - knock sensor 2 - intake air temperature sender - coolant temperature senders - throttle valve module
| G2 | Coolant temperature sender |
| G42 | Intake air temperature sender |
| G62 | Coolant temperature sender |
| G66 | Knock sensor 2 |
| G186 | Throttle valve drive (electric power control) |
| G187 | Throttle valve drive angle sender -1- (electric power control) |
| G188 | Throttle valve drive angle sender -2- (electric power control) |
| J220 | Motronic control unit |
| J338 | Throttle valve module |
| T3b | 3-pin connector, black, in engine compartment |
| T14i | 14-pin connector, in engine compartment, left |
| 12 | Earth point, in engine compartment, left |
| 132 | Earth connection -3-, in engine compartment wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| D101 | Connection -1-, in engine compartment wiring harness |
| * | Engine codes AUM, AUQ and ARY |
| ** | Engine code BAM |
Wiring Diagram AUDI TT 2002 - Motronic control unit - ignition coils
| E87 | Control and display unit for air conditioner |
| J220 | Motronic control unit |
| N70 | Ignition coil 1 with output stage |
| N127 | Ignition coil 2 with output stage |
| N291 | Ignition coil 3 with output stage |
| N292 | Ignition coil 4 with output stage |
| P | Spark plug connector |
| Q | Spark plugs |
| T10x | 10-pin connector, orange, in plenum chamber |
| T17 | 17-pin connector, behind dash panel, right, to air conditioner wiring harness |
| 15 | Earth point, on cylinder head |
| 281 | Earth connection -1-, in engine wiring harness |
| 283 | Earth connection -2-, in engine wiring harness |
| A27 | Connection (speed signal), in dash panel wiring harness, near micro-central electrics |
| D106 | Connection -4-, in engine compartment wiring harness |
| * | Engine codes AUM, AUQ and ARY |
| ** | Engine code BAM |
| *** | Models with air conditioner |
Wiring Diagram AUDI TT 2002 - Motronic control unit - Motronic current supply relay - oil level thermo sender - injectors
| G266 | Oil level thermo sender, service interval |
| J220 | Motronic control unit |
| J271 | Motronic current supply relay |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| S11 | Fuse in fuse box |
| T2m | 2-pin connector, wiring duct, in engine compartment, left |
| T6m | 6-pin connector, brown, in plenum chamber |
| T14i | 14-pin connector, in engine compartment, left |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| 283 | Earth connection -2-, in engine wiring harness |
| A139 | Connection -3- (15), in dash panel wiring harness |
| B157 | Positive (+) connection -3- (15a), in interior wiring harness |
| D140 | Connection (injectors), in engine wiring harness |
Wiring Diagram AUDI TT 2002 - Fuses - speedometer sender - fuel gauge sender - fuel pump
| G | Fuel gauge sender |
| G6 | Fuel pump (pre-supply pump) |
| G22 | Speedometer sender (Hall sender, on gearbox) |
| G169 | Fuel gauge sender -2- |
| S7 | Fuse in fuse box |
| S228 | Fuse 28 in fuse box |
| S229 | Fuse 29 in fuse box |
| S232 | Fuse 32 in fuse box |
| S234 | Fuse 34 in fuse box |
| S243 | Fuse 43 in fuse box |
| T14i | 14-pin connector, in engine compartment, left |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| 277 | Earth connection -3-, in interior wiring harness, behind dash panel |
| 283 | Earth connection -2-, in engine wiring harness |
| A99 | Connection -1- (87), in dash panel wiring harness |
| A100 | Connection -2- (87), in dash panel wiring harness |
| B149 | Positive (+) connection -2- (15a), in interior wiring harness, near starter inhibitor and reversing light relay |
| * | Models with front-wheel drive |
| ** | Models with four-wheel drive |
| *** | Wiring in fuel tank |
Wiring Diagram AUDI TT 2002 - Dash panel insert - handbrake warning switch - oil pressure switch - ambient temperature sensor
| C10 | Suppression filter |
| D2 | Immobilizer reading coil |
| E87 | Control and display unit for air conditioner |
| F1 | Oil pressure switch |
| F9 | Handbrake warning switch |
| G17 | Ambient temperature sensor |
| G106 | Ambient temperature indicator |
| J285 | Control unit with display in dash panel insert |
| K3 | Oil pressure warning lamp |
| K83 | Fault warning lamp for self-diagnosis/exhaust emissions |
| T12a | 12-pin connector, behind dash panel, right |
| T14i | 14-pin connector, in engine compartment, left |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| 277 | Earth connection -3-, in interior wiring harness, behind dash panel |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| A115 | Connection (handbrake warning), in dash panel wiring harness |
| • | CAN bus (data wire) |
| * | Models with manual heater controls |
| ** | Models with air conditioner |
| # | Models with front-wheel drive |
| ## | Models with four-wheel drive |
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