Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI1998A8 SEDAN (4D2) V8-3.7L (AEW)REPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINTRANSMISSION CONTROL SYSTEMSRELAYS AND MODULES - TRANSMISSION AND DRIVETRAINRELAYS AND MODULES - A/TCONTROL MODULELOCATIONSCOMPONENT LOCATIONS5 SPEED AUTOMATIC 01V FWD
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)
5 Speed Automatic 01V FWD
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)SECTION 5 Speed Automatic 01V FWD
Electrical And Electronic Components, Locations
1 - Automatic Transmission Control Module (TCM) -J217-
- Checked via OBD
2 - Engine Control Module (ECM)
- Location: in plenum
3 - Data Link Connector (DLC)
- Location: in knee bar to left of steering wheel
4 - Valve body
- Location: inside transmission oil pan
- Assembly includes solenoid valves -N88-, -N89-, -N90-, -N91-, -N92-, -N93-, -N94-
- Transmission fluid (ATF) temperature sensor -G93- is integrated into internal wiring harness
- Components are electrically checked via OBD
5 - Multi-function Transmission Range (TR) switch -F125-
- Location: left of transmission
- Checked via OBD
6 - Sensor for transmission RPM -G182-
- Location: in valve body
- Checked via OBD
7 - Transmission Vehicle Speed Sensor (VSS) -G38-
- Location: right-rear of transmission
- Sensor for transmission RPM
- Checked via OBD
- Supplies transmission output speed signal
8 - Selector lever mechanism
- Location: in center console
9 - Shift lock solenoid -N110-
- Location: on right side of selector lever mechanism
- Can be checked in "Read Measuring Value Block function 08, and by electrical testing
10 - Throttle Position (TP) sensor -G69-
- Location: integrated into throttle valve control module -J338-
- TP sensor signal is sent via ECM to TCM.
- TP sensor signal is checked by On Board Diagnostic of ECM
- TP sensor signal can be checked in "Read Measuring Value Block" function 08
- If a TP sensor malfunction is detected using OBD program, check OBD program of ECM
11 - Cruise control switch -E45-
- Location: integrated into steering column switch
12 - Park/Neutral Position (PNP) relay -J226-
- Location: relay plate
13 - Transmission range selector lever display -Y6-
- Location: in instrument cluster
- Transmission Range (TR) selector lever display which is completely dark indicates "mechanical backup with non-active control module" mode
- TR selector lever display which is completely lit up indicates "mechanical backup with active control module" mode
14 - Kick down switch -F8-
- Location: behind spray wall in plenum, integrated into accelerator pedal cable
- Replacing: replace and adjust accelerator pedal cable
- Checked via OBD
- Can be checked in "Read Measuring Value Block" function 08, and by electrical testing
15 - Brake light switch -F-
- Location: in pedal cluster
- Can be checked in "Read Measuring Value Block" function 08, and by electrical testing
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:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.