Yukon Denali 4WD V8-6.0L Hybrid (2011)
4. Ignition OFF, disconnect harness connector X1 at the ECM.
5. Ignition ON, verify the MIL is not illuminated.
‹› If the MIL is illuminated, test the MIL control circuit for a short to ground. If the circuit tests normal, replace the IPC.
6. Connect a 3 A fused jumper wire between the MIL control circuit terminal 12-X1 and ground. The MIL should illuminate.
‹› If the MIL does not illuminate, test the MIL control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace
the IPC.
7. If all circuits test normal, replace the ECM.
Repair Instructions
Perform the Diagnostic Repair Verification See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble
Code Tests and Associated Procedures/Verification Tests and Procedures after completing the diagnostic procedure.
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Instrument Cluster Replacement
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Control Module References See: Testing and Inspection/Programming and Relearningfor ECM replacement, setup, and programming
