P1647-HYDRAULIC COOLING FAN CONTROL CIRCUIT HIGH

For a complete wiring diagram Refer to Section 8W.

• When Monitored:

  Ignition on and engine running.

• Set Condition:

  An open or shorted condition in the Hydraulic Fan Solenoid Control circuit is detected by the Front Control Module.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) .

Diagnostic Test

• Refer to the INTERMITTENT CONDITION Diagnostic Procedure.

• Go To 2

• Go To 3

• Repair the open in the (Z823) Ground circuit.
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

• Go To 4

• Go To 5
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

• Repair the short to voltage in the (K173) Hydraulic Radiator Fan Solenoid control circuit between the Hydraulic Cooling Fan Module harness connector and the C2 IPM harness connector.
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

• Replace the Integrated Power Module per Service Information.
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

NOTE: Before continuing, check the FCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

• Repair as necessary.
• Perform BODY VERIFICATION TEST. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

• Replace and program the Front Control Module per Service Information.
• Perform BODY VERIFICATION TEST. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)