Circuit/System Verification
- Verify that DTC P0A31 is not set.
- Vehicle ON, observe the scan tool ECM engine coolant temperature (ECT) parameter in freeze frame data. The reading should be below 125°C (257°F).
- If the ECT was above 125°C (257°F) when the DTC set, go to Engine Overheating
and correct that concern first.
- Vehicle ON, observe the scan tool motor 1 temperature and motor 2 temperature parameters in freeze frame data. The reading should be above 200°C (392°F). If greater than the specified value, go to Automatic Transmission Overheating
. If transmission tests normal, replace M15B drive motor 2 generator.