P1274

P1274-A/C CLUTCH CONTROL CIRCUIT 2 OPEN (TIPM)





For a complete wiring diagram Refer to Diagrams/Electrical.


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

- Set Condition:
An open condition has been detected in the A/C Clutch Control Output circuit by the TIPM. One Trip Fault. Three good trips to turn off the MIL.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Initial Inspection and Diagnostic Overview .


Diagnostic Test


1. ACTIVE DTC
Start the engine.
Allow the engine to reach normal operating temperature.
Turn the A/C on.
With a scan tool, select View DTCs.
Is the DTC Active at this time?

Yes


- Go To 2


No


- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Intermittent Condition .



2. A/C CLUTCH CONTROL OPERATION FROM THE PCM




Turn the ignition off.
Disconnect the C2 TIPM harness connector.
Ignition on, engine not running.
With a 12-volt test light connected to B+, probe the (C13) A/C Clutch Control circuit in the C2 TIPM harness connector.
Using the scan tool under the PCM Actuators, actuate the A/C Clutch.
Does the test light illuminate brightly and flash on an off?

Yes


- Go To 3


No


- Perform the Diagnostic Procedure for P0645-A/C CLUTCH CONTROL CIRCUIT.P0645



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




Turn the ignition off.
Disconnect the TIPM C9 harness connector.
Disconnect the A/C Clutch harness connector.
Measure the resistance of the (C3) A/C Clutch Control Output circuit between the TIPM C9 harness connector and the A/C Clutch harness connector.
Is the resistance below 5.0 ohms?

Yes


- Go To 4


No


- Repair the open in the (C3) A/C Clutch Control Output circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test



4. A/C CLUTCH




Connect the C2 and C9 TIPM harness connectors.
Ignition on, engine not running.
With a 12-volt test light connected to ground, probe the (C3) A/C Clutch Control Output circuit at the A/C Clutch harness connector.
Using the scan tool under the TIPM Actuators, actuate the A/C Clutch.
Does the test light illuminate brightly and flash on and off?

Yes


- Replace the A/C Clutch.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test


No


- Go To 5



5. TOTALLY INTEGRATED POWER MODULE (TIPM)
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the A/C Clutch, TIPM, and the Powertrain Control Module (PCM).
Look for any chafed, pierced, pinched, or partially broken wires.
Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the A/C Clutch, TIPM, and Powertrain Control Module connectors.
Refer to any Technical Service Bulletins that may apply.
Were there any problems found?

Yes


- Repair as necessary.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test


No


- Replace the Totally Integrated Power Module.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test