Location of Control Modules

1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)SECTION Location of Control Modules



CAUTION!
Before working on the electrical system:
- Determine the correct coding for the anti-theft radio.
- Disconnect the battery Ground (GND) strap.



NOTE: After reconnecting the battery be sure to reactivate the radio, clock, power windows and engine.







1 - Engine control module (ECM)
- Located in E-box in plenum
2 - Transmission-control module (TCM) -J217- for automatic transmission
- Located in E-box in plenum
3 - Servotronik control module -J236
- Located in E-box in passenger's footwell
4 - A/C control head -E87
- Located in center console
5 - Instrument cluster combination processor -J218
- Integrated in instrument cluster
6 - Control module for steering column-belt height -J352
- Below driver's seat under footwell carpet
7 - Central-locking/alarm system/interior light delay control module -V94
- Located behind left luggage compartment side panel
8 - Control module for ultrasound sensors -J347
- Located behind left luggage compartment side panel below control module for central locking system
9 - Mirror memory control module -J267
- Located under cover for B-column on driver's side
10 - Left heated door lock control module -J210
- Located at upper door traverse beam in driver's door
11 - Relay for fan speed 1 and 2
- Located on relay panel under storage shelf on driver's side
12 - ABS control module (w/EDL) -J104
- Located under storage shelf, driver's side
13 - Airbag control module -J234
- Located under center console on tunnel
14 - Cruise control, control module -J213
- Located in E-box in plenum


RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.