Express 2500 V8-6.6L DSL Turbo (2010)
tests normal and the ignition circuit fuse is open, replace the IPC.
2. Ignition OFF, disconnect the ECM X2 harness connector. Ignition ON, the MIL should not illuminate.
‹› If the MIL is illuminated, test the MIL control circuit terminal X2-30 for a short to ground. If the circuit tests normal, replace the IPC.
3. Ignition ON, connect a 3A fused jumper wire between the MIL control circuit terminal X2-30 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/bulb.
4. If all circuits/connectors 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 (See: Compass/Service and Repair/Instrument Cluster Replacement)
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Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM and ICM replacement, setup, and programming
