Circuit/System Testing
WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, remove the F103 drive motor generator control module sight shield. Refer to Drive Motor Generator Control Module Sight Shield Replacement , and disconnect the X4 harness connector at the K1 Accessory DC Power Control Module.
- Test for less than 1 ohm between the ground circuit terminal X4 bare ground strap and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Disconnect the X1 connector of the T6 drive motor generator control module. Ignition ON, verify that a test lamp illuminates between the control module voltage circuit terminals listed below and ground:
- Terminal 6
- Terminal 7
- If the test lamp does not illuminate, test the control module voltage circuit for a short to ground or an open/high resistance.
- Ignition ON, verify that a test lamp illuminates between the control module voltage circuit terminal 20 and ground.
- If the test lamp does not illuminate, test the control module voltage circuit for a short to ground or an open/high resistance.
- If all circuits test normal, replace the T6 drive motor generator power inverter module.