2005 AUDI Allroad & A6

Audi A6 Quattro 2005 - BUZZERS, RELAYS & TIMERS

Audi A6 Quattro 2005 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
ABS Return Flow Pump Relay (7)	On 8 fold relay panel. See Fig. 4 .
ABS Solenoid Valve Relay (1)	On 8 fold relay panel. See Fig. 4 .
A/C Clutch Relay (5)	In 13 fold relay panel. See Fig. 1 .
Brake Booster Relay	On relay panel behind instrument panel. See Fig. 120 .
Compressor Level Control System Relay (6)	On 8 fold relay panel. See Fig. 4 .
Coolant Fan Control (FC) Relay (3)	On 8 fold relay panel. See Fig. 4 .
Dual Horn Relay	In micro central electric panel. See Fig. 103 .
Fog Light Relay (6)	In 13 fold relay panel. See Fig. 1 .
Fuel Pump (FP) Relay	In micro central electric panel. See Fig. 103 .
Load Reduction Relay	In micro central electric panel. See Fig. 103 .
Motronic Engine Control Module (ECM) Power Supply Relay	Left rear of engine compartment. See Fig. 107 .
Park Neutral Position Relay	In 13 fold relay panel. See Fig. 1 .
Secondary Air Injection (AIR) Pump Relay (2)	On 3 fold relay panel. See Fig. 3 .
Second Speed Coolant Fan Control (FC) Relay (2)	On 8 fold relay panel. See Fig. 4 .
Solar Cell Separation Relay (3)	In 13 fold relay panel. See Fig. 1 .
Starting Interlock Relay (4)	In 13 fold relay panel. See Fig. 1 .
Wiper/Washer Intermittent Relay	In micro central electric panel. See Fig. 103 .
4 Low Range Hydraulic Pump Relay	In micro central electric panel. See Fig. 103 .

Audi A6 Quattro 2005 - CIRCUIT PROTECTION DEVICES

Audi A6 Quattro 2005 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Central Electric	Behind left side of dash.
Driver Side Relay Carrier	Behind left side of dash.
E Box	Left side of plenum chamber.
Fuse Panel	Behind left side of dash.
8 Pin Relay Carrier	Behind left side of dash.
13 Pin Relay Carrier	Behind left side of dash.

Audi A6 Quattro 2005 - CONTROL UNITS

Audi A6 Quattro 2005 CONTROL UNITS LOCATION

Component	Location
ABS/EDL Control Module	At left side of engine compartment. See Fig. 7 .
Air Bag Control Module	Below center of dash, on transmission tunnel. See Fig. 12 .
Automatic Vertical Aim Control System Control Module	Behind right side of dash. See Fig. 18 .
Central Locking Control Module	Under driver's seat. See Fig. 36 .
Coolant Fan Control (FC) Control Module	Front of engine compartment. See Fig. 42 .
Cruise Control Control Module	Behind right side of dash. See Fig. 46 .
Fresh Air Blower Control Module	On evaporator housing next to fresh air blower motor. See Fig. 37 .
Instrument Cluster Combination Processor	Part of instrument cluster. See Fig. 71 .
Level Control System Control Module	Under rear of vehicle. See Fig. 98 .
Mototronic Engine Control Module (ECM)	Left rear of engine compartment, in plenum chamber. See Fig. 106 .
Parking Aid Control Module	Left side of luggage compartment. See Fig. 38 .
Power Window Control Module (Driver's)	In driver's door. See Fig. 80 .
Power Window Control Module (Left Rear)	In left rear door. See Fig. 86 .
Power Window Control Module (Right Front)	In right front door. See Fig. 122 .
Power Window Control Module (Right Rear)	In right rear door. See Fig. 128 .
Rear Window Shade Control Module	Left rear of vehicle. See Fig. 119 .
Solar Operation Control Module	On underside of solar roof. See Fig. 148 .
Throttle Valve Control Module	At rear of engine. See Fig. 151 .
Tire Pressure Monitoring Control Module	Left side of trunk. See Fig. 153 .
Transmission Control Module (TCM) (CVT)	On transmission. See Fig. 155 .
Transmission Control Module (TCM) (Except CVT)	Under passenger's seat. See Fig. 154 .
Ultra-Sound Sensors Control Module	Near left "C" pillar. See Fig. 39 .

Audi A6 Quattro 2005 - MOTORS

Audi A6 Quattro 2005 MOTORS LOCATION

Component	Location
ABS Return Flow Pump	Left side of engine compartment. See Fig. 6 .
Actuator For Temperature Flap (Left)	On left side of evaporator housing. See Fig. 8 .
Actuator For Temperature Flap (Right)	On right side of evaporator housing. See Fig. 9 .
After-Run Coolant Pump	Lower left side of engine compartment. See Fig. 10 .
Air Flow Flap Motor	On evaporator housing. See Fig. 11 .
Brake Vacuum Pump	Left side of engine compartment. See Fig. 23 .
Central Air Flap Motor	On evaporator housing. See Fig. 27 .
Central Locking System Motor (Driver's)	Rear of driver's door. See Fig. 52 .
Central Locking System Motor (Left Rear)	Rear of left rear door. See Fig. 84 .
Central Locking System Motor (Passenger's)	At rear of passenger's door. See Fig. 114 .
Central Locking System Motor (Right Rear)	In rear of right rear door. See Fig. 126 .
Cruise Control Vacuum Pump	Left front wheel well. See Fig. 45 .
Deck Lid Central Locking System Motor	Inside trunk lid. See Fig. 47 .
Defroster Flap Motor	Behind right side of dash. See Fig. 48 .
Exhaust Flap Valve 1	Under rear of vehicle in exhaust pipe. See Fig. 58 .
Fresh Air Blower	On evaporator housing. See Fig. 59 .
Fuel Pump (FP)	In fuel tank. See Fig. 64 .
Fuel Tank Lid Unlock Motor	Right side of trunk. See Fig. 104 .
Headlight Beam Adjusting Motor (Left)	In left headlight. See Fig. 81 .
Headlight Beam Adjusting Motor (Right)	In right headlight. See Fig. 123 .
Leak Detection Pump (LDP)	In left rear wheel well. See Fig. 78 .
Level Control System Compressor Motor	Under rear of vehicle. See Fig. 97 .
Potentiometer-Actuator For Temperature Flap (Left)	On evaporator housing. See Fig. 116 .
Potentiometer-Actuator For Temperature Flap (Right)	On evaporator housing. See Fig. 117 .
Remote Unlock Rear Lid Motor	Rear of trunk. See Fig. 105 .
Secondary Air Injection (AIR) Pump Motor	Front of engine compartment. See Fig. 137 .
Window Motor (Driver's)	In driver's door. See Fig. 91 .
Window Motor (Left Rear)	In left rear door. See Fig. 88 .
Window Motor (Passenger's)	Right front door. See Fig. 133 .
Window Motor (Right Rear)	In right rear door. See Fig. 130 .

Audi A6 Quattro 2005 - SENDING UNITS/SENSORS

Audi A6 Quattro 2005 SENDING UNITS & SENSORS LOCATION

Component	Location
ABS Wheel Speed Sensor (Left Front)	On left front wheel hub. See Fig. 79 .
ABS Wheel Speed Sensor (Left Rear) (FWD)	On left rear wheel hub. See Fig. 82 .
ABS Wheel Speed Sensor (Left Rear) (Quattro)	On left rear wheel hub. See Fig. 83 .
ABS Wheel Speed Sensor (Right Front)	On right front wheel hub. See Fig. 121 .
ABS Wheel Speed Sensor (Right Rear) (FWD)	On right rear wheel hub. See Fig. 124 .
ABS Wheel Speed Sensor (Right Rear) (Quattro)	On right rear wheel hub. See Fig. 125 .
Accelerator Pedal Position Sender No. 2	At accelerator pedal. See Fig. 140 .
Air Quality Sensor	Right rear of engine compartment. See Fig. 142 .
Back Pressure Flap Motor Position Sensor	Under right side of dash. See Fig. 19 .
Brake Booster Pressure Sensor	Rear of engine compartment. See Fig. 20 .
Broken Window Glass Sensor (Left Rear)	Left side of cargo area. See Fig. 143 .
Broken Window Glass Sensor (Right Rear)	Right side of luggage compartment. See Fig. 144 .
Camshaft Position (CMP) Sensor	Right front of engine. See Fig. 25 .
Camshaft Position (CMP) Sensor 2	Rear of left cylinder bank. See Fig. 26 .
Central Flap Motor Position Sensor	On evaporator housing. See Fig. 28 .
Charge Air Pressure Sensor (2.7L)	Top front of engine. See Fig. 29 .
Defroster Flap Motor Position Sensor	Behind right side of dash. See Fig. 49 .
Engine Coolant Temperature Sensor	In coolant pipe are rear of engine compartment. See Fig. 54 .
Engine Oil Temperature Sensor	Left front of engine. See Fig. 55 .
Engine Speed (RPM) Sensor	On transmission housing. See Fig. 56 .
Exhaust Temperature Sensor 1 (2.7L)	Rear of engine compartment. See Fig. 139 .
Exhaust Temperature Sensor 2 (2.7L)	Rear of engine compartment. See Fig. 141 .
Fresh Air Intake Duct Temperature Sensor	Under right side of dash. See Fig. 60 .
Fuel Level Sensor	Part of fuel tank module. See Fig. 61 .
Fuel Level Sensor No. 2	Inside left side of fuel tank. See Fig. 62 .
Fuel Level Sensor No. 3	In fuel tank behind rear seat. See Fig. 63 .
Heated Oxygen Sensor (HO2S)	Right side of engine compartment. See Fig. 66 .
Heated Oxygen Sensor (HO2S) Connector	Right rear of engine compartment. See Fig. 31 .
Heated Oxygen Sensor (HO2S) No. 2	Left side of engine compartment. See Fig. 67 .
Heated Oxygen Sensor (HO2S) No. 2 Connector	Left rear of engine compartment. See Fig. 30 .
Intake Air Temperature (IAT) Sensor	Rear of engine compartment. See Fig. 72 .
Knock Sensor (KS) No. 1	Right side of engine. See Fig. 76 .
Knock Sensor (KS) No. 1 Connector	Right rear of engine compartment. See Fig. 32 .
Knock Sensor (KS) No. 2	Left side of engine. See Fig. 77 .
Knock Sensor (KS) No. 2 Connector	Left rear of engine compartment. See Fig. 33 .
Level Control System Sensor (Left Front)	At left side of front axle. See Fig. 92 .
Level Control System Sensor (Left Rear)	At left side of rear axle. See Fig. 94 .
Level Control System Sensor (Right Front)	At right side of front axle. See Fig. 99 .
Level Control System Sensor (Right Rear)	At right side of rear axle. See Fig. 135 .
Mass Air Flow (MAF) Sensor	Right side of engine compartment. See Fig. 102 .
Oil Level Thermal Sensor	Bottom of engine oil pan. See Fig. 109 .
Outside Air Temperature Sensor	Behind center of front bumper. See Fig. 111 .
Oxygen Sensor (O2S) Connector	Right rear of engine compartment. See Fig. 34 .
Oxygen Sensor (O2S) No. 2 Behind Catalytic Converter	Under front of vehicle. See Fig. 112 .
RPM Sensor Connector	Left rear of engine compartment. See Fig. 35 .
Side Air Bag Crash Sensor (Driver's Side)	Under driver's seat on floor. See Fig. 43 .
Side Air Bag Crash Sensor (Left Rear)	At bottom of left "C" pillar. See Fig. 87 .
Side Air Bag Crash Sensor (Passenger's Side)	On floor under passenger's seat. See Fig. 44 .
Side Air Bag Crash Sensor (Right Rear)	At bottom of right "C" pillar. See Fig. 129 .
Speedometer Vehicle Speed Sensor (VSS)	On transmission. See Fig. 149 .
Throttle Position Sensor	On accelerator pedal. See Fig. 150 .
Tire Pressure Sensor (Left Front)	On left front wheel rim. See Fig. 145 .
Transverse Acceleration Sensor	Under center of rear seat. See Fig. 146 .
Vent Temperature Sensor (Left)	In left air vent. See Fig. 90 .
Vent Temperature Sensor (Right)	In right air vent. See Fig. 132 .
Yaw Sensor	Under center of rear seat. See Fig. 159 .

Audi A6 Quattro 2005 - SOLENOIDS & SOLENOID VALVES

Audi A6 Quattro 2005 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
Camshaft Adjustment Valve No. 1	Rear of engine. See Fig. 156 .
Camshaft Adjustment Valve No. 2	Left front of engine. See Fig. 157 .
Evaporative Emissions (EVAP) Canister Purge Regulator Valve	Right side of engine compartment. See Fig. 57 .
Intake Manifold Tuning (IMT) Valve	Rear of intake manifold. See Fig. 73 .
Intake Manifold Tuning (IMT) Valve No. 2	Front of engine. See Fig. 74 .
Level Control Accumulator Valve	Above rear sway bar. See Fig. 96 .
Level Control System Solenoid Valve	Under rear of vehicle. See Fig. 100 .
Secondary Air Injection (AIR) Solenoid Valve	Rear of engine. See Fig. 138 .
Shift Lock Solenoid	Integral to shift mechanism. See Fig. 147 .
Suspension Strut Valve (Left Front)	Above rear sway bar. See Fig. 93 .
Suspension Strut Valve (Left Rear)	Above rear sway bar. See Fig. 95 .
Suspension Strut Valve (Right Rear)	Above rear sway bar. See Fig. 136 .
Waste Gate Bypass Regulator Valve (2.7L)	Right side of engine. See Fig. 158 .

Audi A6 Quattro 2005 - SWITCHES

Audi A6 Quattro 2005 SWITCHES LOCATION

Component	Location
A/C Pressure Switch	Right front of engine compartment. See Fig. 5 .
B-Pillar Micro Switch (Right)	Base of right "B" pillar. See Fig. 134 .
Brake Fluid Level Warning Switch	Rear of engine compartment on reservoir. See Fig. 21 .
Brake Light Switch	Under left side of dash. See Fig. 22 .
Brake Vacuum Vent Valve Switch	On brake pedal bracket. See Fig. 24 .
Coolant Fan Control (FC) Thermal Switch	On radiator. See Fig. 41 .
Door Contact Switch (Driver's)	Rear of driver's door. See Fig. 50 .
Door Contact Switch (Left Rear)	In rear of left rear door. See Fig. 85 .
Door Contact Switch (Passenger's)	Rear of passenger's door. See Fig. 51 .
Door Contact Switch (Right Rear)	Rear of right rear door. See Fig. 127 .
Engine Coolant Level Warning Switch	Left side of engine compartment. See Fig. 53 .
Hood Alarm Switch	In hood latch assembly. See Fig. 69 .
Kick Down Switch	Rear of engine compartment on bulkhead. See Fig. 75 .
Multi-Function Transmission Range (TR) Switch	On transmission. See Fig. 108 .
Oil Pressure Switch	On oil filter housing adapter. See Fig. 110 .
Parking Brake Warning Light Switch	At base of parking brake handle. See Fig. 113 .
Tiptronic Switch	Integral to shift mechanism. See Fig. 152 .

Audi A6 Quattro 2005 - MISCELLANEOUS

Audi A6 Quattro 2005 MISCELLANEOUS LOCATION

Component	Location
Alarm Horn	Left rear of vehicle. See Fig. 13 .
Antenna For Tire Pressure Check (Left Front)	In left front wheel well. See Fig. 14 .
Antenna For Tire Pressure Check (Left Rear)	In left rear wheel well. See Fig. 16 .
Antenna For Tire Pressure Check (Right Front)	In right front wheel well. See Fig. 15 .
Antenna For Tire Pressure Check (Right Rear)	In right rear wheel well. See Fig. 17 .
Coolant Fan Control (FC) Series Resistance	Left front of engine compartment. See Fig. 40 .
High Tone Horn	Left front of engine compartment. See Fig. 68 .
Ignition Coil	Front of engine compartment. See Fig. 70 .
Low Tone Horn	Right front of vehicle. See Fig. 101 .
Passenger's Airbag Igniter 1	Behind right side of dash. See Fig. 115 .
Power Output Stage	Front of engine compartment. See Fig. 118 .
Seat Belt Tensioner Igniter (Left)	Base of left "B" pillar. See Fig. 89 .
Seat Belt Tensioner Igniter (Right)	Right "B" pillar. See Fig. 131 .

Audi A6 Quattro 2005 - CONNECTORS

Audi A6 Quattro 2005 CONNECTORS LOCATION

Component	Location
T16b (A/T) (16 Pin)	On transmission. See Fig. 2 .

Audi A6 Quattro 2005 - GROUNDS

Audi A6 Quattro 2005 GROUNDS LOCATION

Component	Location
G1	Right side of engine compartment. See Fig. 65 .
G2	On lower right "A" pillar. See Fig. 65 .
G3	Battery ground strap. See Fig. 65 .
G4	Right "B" pillar. See Fig. 65 .
G5	Right "D" pillar. See Fig. 65 .
G6	Near right taillight. See Fig. 65 .
G7	Left side of luggage compartment. See Fig. 65 .
G8	Lower left "A" pillar. See Fig. 65 .
G9	On ABS hydraulic unit. See Fig. 65 .
G10	Left side of engine compartment. See Fig. 65 .
G11	Engine to body ground strap. See Fig. 65 .
G12	Near ignition coil. See Fig. 65 .