Circuit/System Verification
WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
- Verify that DTC P0A31 is not set.
- If DTC P0A31 is set, Refer to DTC P0A2B-P0A2D or P0A31-P0A33 .
- Ignition 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 Symptoms - Engine Cooling and correct that concern first.
- Ignition 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.