P1275-A/C CLUTCH CONTROL CIRCUIT 2 OVERCURRENT (TIPM)





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    With the ignition on. Battery voltage greater than 10.4 volts. TIPM requesting A/C Clutch operation.

  • Set Condition:

    An overcurrent condition is detected in the A/C Clutch control output circuit. One Trip Fault. Three good trips to turn off the MIL.


Possible Causes
  
TERMINAL DAMAGE OR CORROSION
 
A/C CLUTCH GROUND HIGH RESISTANCE
  
(C3) A/C CLUTCH CONTROL OUTPUT CIRCUIT HIGH RESISTANCE
  
(C3) A/C CLUTCH CONTROL OUTPUT CIRCUIT SHORTED TO GROUND
  
A/C COMPRESSOR CLUTCH
  
TIPM
  

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



Diagnostic Test

1.A/C CLUTCH OPERATION




Is the A/C Clutch actuating?

Yes


No
  • Go To 2

2.VISUAL AND PHYSICAL CONNECTOR AND TERMINAL INSPECTION





NOTE: Make sure that all in-line connectors are inspected for corrosion and/or damage.




Were any of the above conditions found?

Yes


No
  • Go To 3

3.(C3) A/C CLUTCH CONTROL OUTPUT CIRCUIT EXCESSIVE RESISTANCE





NOTE: The test light should be illuminated and bright. Compared the brightness to that of a direct connection to the battery.



Does the test light illuminate brightly?

Yes
  • Go To 4


No

4.(C3) A/C CLUTCH CONTROL OUTPUT CIRCUIT SHORTED TO GROUND





Is the resistance below 100 ohms?

Yes


No
  • Go To 5

5.A/C CLUTCH GROUND CIRCUIT




NOTE: The test light should be illuminated and bright. Compared the brightness to that of a direct connection to the battery.



Does the test light illuminate brightly?

Yes
  • Go To 6


No

6.A/C CLUTCH CONTROL OUTPUT FROM TIPM








Does the test light illuminate brightly?

Yes


No