Fault-Tracing

Fault-tracing TCM-DD02

Checking communication with the gear selector (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 value changes, this indicates that the fault is intermittent, i.e. the fault was present previously but is not active at the moment.










Continue - Checking the wiring

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Checking the wiring
Check if there are any external sources of interference near the communication cable (LIN) between the transmission control module (TCM) terminal #A7 and gear selector module (GSM) terminal #2 which can disturb communication.
Check the communication cable (LIN) between the transmission control module (TCM) terminal #A7 and gear selector module (GSM) terminal #2. Check for intermittent short circuits. Check for intermittent open-circuits.

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




Verification

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 (GSM)

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