Express 2500 V8-6.6L DSL Turbo (2010)
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The MIL Ckt Open Test Status
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The MIL CKT Short Volts Test Status
Each parameter should display OK or Not Run.
Circuit/System Testing
1. Ignition OFF, disconnect the X1 harness connector at the K20 ECM.
2. Ignition ON, the MIL should not illuminate.
‹› If the MIL is illuminated, test the MIL control circuit terminal 17-X1 for a short to ground. If the circuit tests normal, replace the IPC.
3. Connect a 3 A fused jumper wire between the MIL control circuit terminal 17-X1 and ground. The MIL should illuminate.
‹› If the MIL illuminates, replace the ECM.
‹› If the MIL does not illuminate, test the MIL control circuit for a short to voltage or an open/high resistance. If the MIL control circuit tests OK,
test the cluster ignition circuit terminal 19 for a short to ground or open/high resistance. If the circuits test normal, replace the IPC/bulb.
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: Instrument Panel, Gauges and Warning Indicators/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
