Fault-Tracing Information

Fault-tracing

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) is below 9 V it means that the fault is permanent.
If the voltages are approximately the same then this would suggest that the fault has previously been present but is no longer active. The fault is intermittent.









Continue - Checking the components and wiring

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Checking the components and wiring
Check the battery status.
Check connector A on the transmission control module (TCM). Check for contact resistance and oxidation.
Check the power supply cable (30 supply). Check for an intermittent open-circuit.
Take readings between:
- Transmission control module (TCM) terminal #A1 (#31) and the fuse in the engine compartment relay/fuse box.
Check the power supply cable (15 supply). Check for contact resistance and oxidation.
Take readings between:
- Transmission control module (TCM) terminal #A11 (#41) and the fuse in the passenger compartment relay/fuse box.

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

Check the ground cable. Check for an intermittent open-circuit.
Take readings between:
- Transmission control module (TCM) terminal #A9 (#39) and grounding point.

Hint: When the ignition is on, the voltmeter should show battery voltage between #A9 (#39) and the positive battery terminal.

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

Remedy as necessary.

Other information
- Breakout box, connecting, B6304T4, TF-80SC AWD, B6324S5, TF-80SC AWD, B6324S5, TF-80SC, B6324S4, TF-80SC AWD, B6324S4, TF-80SC Connecting The Breakout Box, Transmission Control Module (TCM)
- Signal specification, B6304T4, TF-80SC AWD, B6324S5, TF-80SC AWD, B6324S5, TF-80SC, B6324S4, TF-80SC AWD, B6324S4, TF-80SC Signal Specification, Transmission Control Module (TCM)
- To access connector A:
- Checking wiring and terminals Checking Wiring And Terminals
- For information on cable routing, see associated wiring diagram.









Continue - Verification

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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).
Voltage should be about equal to battery voltage.
- Start the engine. Allow the engine to idle.
- Read off the power supply for the transmission control module (TCM) again.
The voltage must be raised to 13-15V depending on the generator (GEN) 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 - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking the power supply

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