Control Module: Testing and Inspection

TCM and its circuits can be checked at TCM wiring couplers by measuring voltage and resistance.

CAUTION: TCM cannot be checked by itself. It is strictly prohibited to connect voltmeter or ohmmeter to TCM with coupler disconnected from it.

Voltage Check
- Remove TCM from vehicle body, it necessary.








- Check voltage at each terminal of couplers connected.
NOTE: As each terminal voltage is affected by the battery voltage, confirm that it is liv or more when ignition switch is ON.











Normal Voltage Values

Resistance Check
- Disconnect TCM couplers from TCM with ignition switch OFF.

CAUTION: Never touch terminals of TCM itself or connect voltmeter or ohmmeter.





- Check resistance between each terminal of couplers disconnected.





Normal Resistance Values

CAUTION:
- Be sure to connect ohmmeter probe from wire harness side of coupler.
- Be sure to turn OFF ignition switch for this check.
- Resistance in table below represents that when parts temperature is 2O°C (68°F).