S4 Quattro Wagon V8-4.2L (BHF) (2008)
Control Module: Testing and Inspection
09L, 6 Speed A/T AWD
Transmission Control Module Voltage Supply, Checking
NOTE: The Transmission Control Module (TCM) J217 is a component of the mechatronic unit in the transmission and cannot be replaced separately.
Special tools, testers and auxiliary items required
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Multimeter V.A.G 1526 A or equivalent.
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Wiring diagrams.
Requirements
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The fuses for the transmission electronics OK. Electrical Wiring Diagrams,
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Troubleshooting and Component Locations.
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The battery voltage must be at least 12.5 volts.
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The Ground (GND) connections at the transmission OK.
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The parking brake engaged.
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The selector lever of automatic transmission in position "P".
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All electrical consumers switched off.
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The ignition switched off.
Test sequence
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Release the electrical connector in the - direction of the arrow - and remove it from the Transmission Control Module (TCM) J217.
Observe safety precautions.
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Check the electrical harness connector for contact corrosion and ingress of water.
If the electrical harness connector is not OK:
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Repair the malfunction.
If the electrical harness connector is OK:
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Check the wiring according to the wiring diagram:
If no malfunctions are found in the wiring:
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Replace the Mechatronic unit in the transmission:
NOTE: The Transmission Control Module (TCM) J217 is a component of the Mechatronic unit and cannot be replaced separately.
Final procedures
1. Check the DTC memory. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures/Diagnostic Mode 03 - Read DTC Memory
2. If necessary, erase DTC memory of the Transmission Control Module (TCM) J217. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 04 - Erase DTC Memory
3. Generate readiness code. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles
and Readiness Codes