Theory Of Operation
WARNING: This page is about a different variant/trim than selected.
The Transmission Control Module (TCM) measures the actual solenoid voltages and compares them to calibrated values to identify the following electrical failures:
- Short to battery
- Open circuit
- Short to ground
When the solenoid is switched on (i.e. commanded control value is 100%), the diagnostic can not distinguish between short to ground and open circuit. In that case, the Application-Specific Integrated Circuit (ASIC) status information is used to detect the failure.