Checking Lock-Up Function

Checking the lock-up function

Checking the lock-up function
If Transmission control module (TCM) receives information from Brake control module (BCM) that a wheel sensor is off, then Transmission control module (TCM) turns off the lock-up function during engine braking. Then the Lock-up function will be constantly open and the engine receives idle rpm during engine braking.

Fault cause
- Look for the cause of the fault in the brake control module (BCM).

Fault symptom
- Automatic transmission/Lockup does not work

Continue - DONE

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