Fault-Tracing

Fault-tracing TCM-E010

Checking the power supply




- Ignition on
- Read the voltage supply for the transmission control module (TCM) and central electronic module (CEM).
The voltage supply for the transmission control module (TCM) and central electronic module (CEM) must be approximately the same.
If the voltage for the transmission control module (TCM) deviates more than 1.7 V from the central electronic module(CEM) it means that the fault is permanent.
If the voltages are approximately the same then this would suggest that the fault is intermittent, i.e. that the fault has previously been present but is no longer active.










Continue - Checking cable and component

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Checking cable and component
Check connector A on the transmission control module (TCM). Check for contact resistance and oxidation.
Check the power supply cable (30 supply) between the fuse in the relay /fusebox in the engine compartment and the transmission control module (TCM) terminal #A1 (#31). Check for contact resistance and oxidation. For information about routing of wiring, see the accompanying Wiring diagram.
Check the power supply cable (15 supply) between the fuse in the relay /fusebox in the engine compartment and the transmission control module (TCM) terminal #A11 (#41). Check for contact resistance and oxidation. For information about routing of wiring, see the accompanying Wiring diagram.

Hint: With the ignition on the voltmeter must display battery voltage at both terminals when measured against ground.

Check the ground cable between the ground terminal and the transmission control module (TCM) terminal #A9 (#39). Check for contact resistance and oxidation. For information about routing of wiring, see the accompanying Wiring diagram.

Hint: With the ignition on the voltmeter must display battery voltage between #A9 (#39) and the battery + pole.

Note! No fault is found, fault trace central electronic module (CEM).

Remedy as necessary.

Other information
- Connecting the breakout box Connecting Breakout Box, Transmission Control Module (TCM)
- Signal description Signal Description. Transmission Control Module (TCM)
- To access connector A, see: Transmission control module (TCM), replacing Service and Repair
- 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
- Read off the power supply for the transmission control module (TCM).
The voltage must be about the same as the battery voltage.
- Start the engine and allow it to idle.
- Read off the power supply for the transmission control module (TCM) again.
The voltage should rise to 13-15 V, depending on the alternator charging voltage.





Is the voltage OK?

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 the power supply

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