Diagnostic Test

1. Ignition on, engine not running.
2. With a scan tool, actuate the Cooling Fan.

   Is the Cooling Fan operating?

   Yes 

   • Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .

   No 

   • Go To  2

Are any CAN C or ECT DTCs Active at this time?

Yes 

• Perform the appropriate diagnostics for the ECT Sensor or CAN C Bus DTC. Refer to DTC INDEX .

No 

• Go To  3

Are any Cooling Fan Control Circuit DTCs set in the TIPM?

Yes 

• Diagnose the appropriate Cooling Fan Control Circuit DTC in the TIPM. Refer to DIAGNOSIS AND TESTING .

No 

• Go To  4

1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Totally Integrated Power Module (TIPM) and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Sensor and Powertrain Control Module connectors.
4. Perform any Technical Service Bulletins that may apply.

   Were there any problems found?

   Yes 

   • Repair as necessary.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

   No 

   • Replace and program the Powertrain Control Module in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL .
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .