P0647

P0647-A/C CLUTCH CONTROL CIRCUIT 2 HIGH (TIPM)





For a complete wiring diagram consult Diagrams/Electrical.


- When Monitored:
With the ignition on. Battery voltage greater than 10 volts. A/C Switch on.

- Set Condition:
A shorted high or 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. Checking For An Intermittent DTC




2. (C3) A/C CLUTCH CONTROL OUTPUT CIRCUIT SHORTED TO VOLTAGE




Turn the ignition off.
Disconnect the C2 TIPM harness connector.
Disconnect the A/C Compressor Clutch harness connector.
Ignition on, engine not running.
Measure the voltage on the (C3) A/C Clutch Control Output circuit at the A/C Compressor Clutch harness connector.
Is there any voltage present?

Yes


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


No


- Go To 3




3. A/C CLUTCH GROUND CIRCUIT OPEN




Turn the ignition off.
Connect the C2 TIPM harness connectors.
Using a 12-volt test light connected to 12-volts, probe the (Z153) A/C Clutch ground circuit at the A/C Compressor Clutch harness connector.
Does the test light illuminate brightly?

Yes


- Go To 4


No


- Repair the excessive resistance in the (Z153) A/C Clutch ground circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test




4. A/C COMPRESSOR CLUTCH




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 Compressor 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 Compressor Clutch.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test


No


- Inspect the A/C Clutch Control Output circuit for an open.If OK, replace the Totally Integrated Power Module.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test