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Home >> Audi >> 1999 >> A8 Sedan (4D2) V8-3.7L (AEW) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> CAN-Bus Data Exchange Between Motronic ECM and Automatic TCM
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CAN-Bus Data Exchange Between Motronic ECM and Automatic TCM




CAN-bus Data Exchange Between Motronic ECM And Automatic Transmission TCM, Checking

- Check Diagnostic Trouble Code (DTC) memory for Transmission Control Module (TCM).
- Switch ignition off.







- Connect VAG1598/19 test box to ECM harness connector. Refer "Scan Tool Testing/Scan Tool Connecting and Initial Checks/VAG1598/19 Test Box, Connecting" Testing and Inspection
- Check wiring for open or short circuit between TCM and ECM/test box sockets A9 and A10.

If wiring is OK:
- Temporarily replace ECM and/or TCM.
- Generate readiness code. Refer "Monitors, Trips and/or Drive Cycle (Readiness Code)/Generating, Readiness Code" Testing and Inspection
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