1998 Audi A4

Audi A4 1998 - Buzzers, Relays & Timers

Audi A4 1998 Buzzers, Relays & Timers

Component	Component Location
A/C Clutch Relay	On 13-pin relay carrier, position No. 3. See Fig. 7.
Coolant Fan Control Relay	On 8-pin relay carrier position No. 3. See Fig. 6.
Dual Horn Relay	On front side of central electric panel, position No. 2. See Fig. 5.
Fuel Pump Relay	On front side of central electric panel, position No. 6. See Fig. 5.
Headlight Washer System Relay	On front side of central electric panel, position No. 3. See Fig. 5.
Load Reduction Relay	On front side of central electric panel, position No. 1. See Fig. 5.
Park/Neutral Position Relay	On front side of central electric panel, position No. 4. See Fig. 5.
Power Window/Sun Roof Control Module Relay	On 8-pin relay carrier, position No. 4. See Fig. 6.
Second Speed Coolant Fan Control Relay	On 8-pin relay carrier, position No. 2. See Fig. 6.
Selector Lever Light Relay	On 13-pin relay carrier, position No. 6. See Fig. 7.
Wiper/Washer Intermittent Relay	On front side of central electric panel, position No. 5. See Fig. 5.

Audi A4 1998 - Circuit Protection Devices

Audi A4 1998 Circuit Protection Devices

Component	Component Location
Auxiliary Relay Panel	Left side of engine compartment. See Fig. 4.
Fuse Assembly	Behind left side of dash. See Fig. 4.
Fuse Relay Panel	Behind left side of dash. See Fig. 4.
Relay Panel	Behind left side of dash. See Fig. 4.

Audi A4 1998 - Control Units

Audi A4 1998 Control Units

Component	Component Location
ABS/Electronic Differential Lock Control Module	Below left side of rear seat. See Fig. 4.
Air Bag Control Module	In center console. See Fig. 4.
Central Locking/Interior Light Delay/Anti-Theft Alarm Control Module	On bottom right of luggage compartment See Fig. 4.
Cruise Control, Control Module	Behind right side of dash. See Fig. 4.
Engine Control Module	In left rear corner of engine compartment. See Fig. 2.
Heated Lock Cylinder Control Module	Upper part of left front door. See Fig. 4.
Rear Light Control Module	On 13-pin relay carrier, positions No. 4 & No. 5. See Fig. 7.
Transmission Control Module	Under carpet, forward of passenger's seat. See Fig. 4.
Ultrasonic Interior Monitor Control Module	Below center of rear seat. See Fig. 4.

Audi A4 1998 - Motors

Audi A4 1998 Motors

Component	Component Location
Central Locking Motor	Below center of rear seat.

Audi A4 1998 - Sending Units & Sensors

NOTE:

For 1.8L locations, see Fig. 1.

Audi A4 1998 Sending Units & Sensors (V6)

Component	Component Location
Camshaft Position Sensor	Rear left side of engine. See Fig. 2.
Crankshaft Position Sensor	Front left side of engine. See Fig. 3.
EGR Temperature Sensor	On intake manifold under throttle body. See Fig. 2.
Engine Coolant Temperature Sensor	Right Side of engine. See Fig. 3.
Engine Speed Sensor	Rear left side of engine. See Fig. 3.
Evaporative Emission Canister Sensor	Right front corner of engine compartment. See Fig. 3.
Heated Oxygen Sensor	Right side of engine. See Fig. 2.
Heated Oxygen Sensor 2	Left side of engine. See Fig. 3.
Knock Sensor 1	Right side of engine. See Fig. 3.
Knock Sensor 2	Left side of engine. See Fig. 3.
Mass Airflow Sensor	On air intake hose. See Fig. 2.
Throttle Position Sensor	On intake manifold under throttle body. See Fig. 2.

Audi A4 1998 - Solenoids & Solenoid Valves

Audi A4 1998 Solenoids & Solenoid Valves

Component	Component Location
EGR Vacuum Regulator Solenoid Valve	On intake manifold under throttle body. See Fig. 2.
Evaporative Emission (EVAP) Canister Purge Regulator Valve	On right side of engine compartment. See Fig. 3.
Fuel Tank Flap Actuator	On right side of luggage compartment.
Idle Air Control Valve	On right side of engine. See Fig. 3.
Intake Manifold Change-Over Valve	On intake manifold under throttle body. See Fig. 2.
Trunk Lid Actuator	On center rear of trunk lid.

Audi A4 1998 - Miscellaneous

Audi A4 1998 Miscellaneous

Component	Component Location
Data Link Connector (DLC)	In rear of center console. See Fig. 4.
Fuel Pressure Regulator	On right side of engine. See Fig. 3.
Ground Connection	On intake manifold. See Fig. 3.
Ground Connection	On right engine mount. See Fig. 2.
Ignition Coil Power Output Stage	On right front corner of engine compartment. See Fig. 2.
Left Connector Station	Under bottom of left A pillar trim. See Fig. 4.
Right Connector Station	Under bottom of right A pillar trim . See Fig. 4.

Audi A4 1998 - Connectors

Audi A4 1998 Connectors

Component	Component Location
T6 (Yellow, 6 Pin)	Under bottom of right "A" pillar, on connector station.
T6A (Red, 6 Pin)	Under bottom of right "A" pillar, on connector station.
T6B (Yellow, 6 Pin)	Under bottom of left "A" pillar, on connector station.
T6C (Red, 6 Pin)	Under bottom of left "A" pillar, on connector station.
T6D (Brown, 6 Pin)	Under bottom of right "A" pillar, on connector station.
T6E (Blue, 6 Pin)	Under bottom of left "A" pillar, on connector station.
T6F (Orange, 6 Pin)	Under bottom of right "A" pillar, on connector station.
T6G (Gray, 6 Pin)	Under bottom of right "A" pillar, on connector station.
T6J (Red, 6 Pin)	Under bottom of left "A" pillar, on connector station.
T6O (White, 6 Pin)	Under bottom of right "A" pillar, on connector station.
T6Q (Orange, 6 Pin)	Under bottom of left "A" pillar, on connector station.
T6Z (Red, 6 Pin)	In E-box, at left rear of engine compartment.
T8A (Black, 8 Pin)	In E-box, at left rear of engine compartment.
T10 (Brown, 10 Pin)	In E-box, at left rear of engine compartment.
T10A (Brown, 10 Pin)	Under bottom of left "A" pillar, on connector station.
T10B (Orange, 10 Pin)	Under bottom of left "A" pillar, on connector station.
T10C (Violet, 10 Pin)	Under bottom of left "A" pillar, on connector station.
T10F (Black, 10 Pin)	Under bottom of right "A" pillar, on connector station.
T10G (Brown, 10 Pin)	Under bottom of right "A" pillar, on connector station.
T10H (Brown, 10 Pin)	Under bottom of left "A" pillar, on connector station.
T10I (Black, 10 Pin)	Below rear of center console.
T10J (Green, 10 Pin)	Under bottom of left "A" pillar, on connector station.
T10K (Red, 10 Pin)	At left "B" pillar.
T10M (Black, 10 Pin)	In E-box, at left rear of engine compartment.
T10N (Red, 10 Pin)	Under bottom of right "A" pillar, on connector station.
T10O (Red, 10 Pin)	On right "B" pillar.
T10Q (Blue, 10 Pin)	Under bottom of left "A" pillar, on connector station.
T10V (Brown, 10 Pin)	Under bottom of right "A" pillar, on connector station.
T10X (Blue, 10 Pin)	Under bottom of right "A" pillar, on connector station.
T10Y (Blue, 10 Pin)	In E-box, at left rear of engine compartment.
T10Z (Yellow, 10 Pin)	In E-box, at left rear of engine compartment.

Audi A4 1998 - Grounds

Audi A4 1998 Grounds

Component	Component Location
G3	On right front of engine.
G12	At left rear of engine compartment. See Fig. 4.
G18	On top front of engine.
G32	Above left kick panel. See Fig. 4.
G43	Above right kick panel. See Fig. 4.