P0691-COOLING FAN 1 CONTROL CIRCUIT LOW





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    With the ignition on. Battery voltage greater than 10 volts.

  • Set Condition:

    The PCM is requesting the TIPM to turn on the Cooling Fan On and it is not operating. The TIPM detects an open in the Relay Coil Control circuit. One Trip Fault. Three good trips to turn off the MIL.


Possible Causes
  
LOW SPEED COOLING FAN RELAY
  
TOTALLY INTEGRATED POWER MODULE
  

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



Diagnostic Test

1.COOLING FAN RELAY OPERATION




Is the Cooling Fan operating?

Yes
  • Refer to the INTERMITTENT CONDITION Diagnostic Procedure.


No
  • Go To 2

2.LOW SPEED COOLING FAN RELAY







Is the Cooling Fan operating?

Yes


No
  • Go To 3

3.TOTALLY INTEGRATED POWER MODULE

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





Were any problems found?

Yes


No