Fault-Tracing

Fault-tracing TCM-DD10

Checking communication with the gear selector module (GSM)




- Ignition on
- Check if the communication with Gear selector module (GSM) works by moving the gear selector to position Man. Then move the gearshift selector toward both + and -, and check that the value has been updated in the driver information module's display window.
The fault is permanent if the value does not change.
If the status switches it means that the fault was present previously but is not active now. There is an intermittent fault.










Continue - Checking the components and wiring

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Checking the components and wiring
Check connector (16 pin) for the transmission control module (TCM) and gear selector module (GSM). Check for contact resistance and oxidation.
Check the communication cable (LIN) between the transmission control module (TCM) terminal #A7 and gear selector module (GSM) terminal #2. Check for an open-circuit.
Check the voltage supply cable between the transmission control module (TCM) terminal #A16 and the gear selector model (GSM) terminal #1. Check for an open circuit.

Hint: The gear selector module (GSM) is supplied with power by the transmission control module (TCM).

Check the ground cable between the gear selector module (GSM) terminal #6 and ground. Check for an open circuit. Check the ground terminal for the ground cable.
If no fault can be found in the cable and the fault remains try replacing the printed circuit board (gear selector module (GSM)).

Other information
- Connecting the breakout box Connecting Breakout Box, Transmission Control Module (TCM)
- Signal description Signal Description. Transmission Control Module (TCM)
- Printed circuit board gear selector assembly/top panel, replacing Printed Circuit Board Gear Selector Assembly/Top Panel, Replacing
- Checking wiring and terminals Checking Wiring And Terminals









Continue - Verification

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Verification




Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off.
- Reinstall the connectors, components etc.
- Ignition on.
- Check if the communication with Gear selector module (GSM) works by moving the gear selector to position Man. Then move the gearshift selector toward both + and -, and check that the value has been updated in the driver information module's display window.
The fault is permanent if the value does not change.
If the value changes, this indicates that the fault is intermittent, i.e. the fault was present previously but is not active at the moment.





Does the status change?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - Fault Found

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking communication with the gear selector module (GSM)

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