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Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> (Totally Integrated Power Module (TIPM) - Electrical Diagnostics) >> DTC Troubleshooting >> P1273-A/C Clutch Control Circuit 2 High >> Diagnostic Test

Diagnostic Test

  1. A/C CLUTCH OPERATION 
    NOTE:

    If Powertrain Control Module (PCM) DTC P0645-A/C CLUTCH CONTROL CIRCUIT is present, diagnose it first.

    1. Ignition on, engine not running.
    2. With the scan tool, actuate the A/C Clutch.

      Does the A/C Clutch actuate?

      Yes 

      • Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  2
  2. (C3) A/C CLUTCH DRIVER CIRCUIT SHORTED TO VOLTAGE 
    1. Turn the ignition off.
    2. Disconnect the A/C Compressor Clutch harness connector.
    3. Disconnect the TIPM C1 harness connector.
    4. Ignition on, engine not running.
    5. Measure the voltage between ground and the (C3) A/C Clutch Driver circuit at the A/C Compressor Clutch harness connector.

      Is there any voltage present?

      Yes 

      • Repair the short to voltage in the (C3) A/C Clutch Driver circuit.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  3
  3. CHECK THE TIPM FOR CORRECT OPERATION 
    1. Turn the ignition off.
    2. Reconnect the TIPM C1 harness connector.
    3. Ignition on, engine not running.
    4. Connect a 12-volt test light between the (C3) A/C Clutch Driver circuit and (Z906) Ground circuit at the A/C Compressor Clutch harness connector.
    5. With the scan tool, actuate the A/C Clutch.

      Does the test light illuminate when the A/C Clutch is commanded on?

      Yes 

      • Verify that there is good pin to terminal contact in the A/C Compressor Clutch and TIPM connectors. If OK, replace the A/C Clutch in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  4
  4. CHECK THE (C3) A/C CLUTCH DRIVER CIRCUIT FOR AN OPEN 
    1. Turn the ignition off.
    2. Disconnect the TIPM C1 harness connector.
    3. Measure the resistance of the (C3) A/C Clutch Driver circuit between the A/C Compressor Clutch harness connector and the TIPM C1 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  5

      No 

      • Repair the open in the (C3) A/C Clutch Driver circuit.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  5. CHECK THE (Z906) GROUND CIRCUIT FOR AN OPEN 
    1. Using a 12-volt test light connected to 12-volts, check the (Z906) Ground circuit at the A/C Compressor Clutch harness connector.

      Does the test light illuminate brightly?

      Yes 

      • Go To  6

      No 

      • Repair the open or excessive resistance in the (Z906) Ground circuit.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  6. TOTALLY INTEGRATED POWER MODULE (TIPM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the A/C Clutch and TIPM.
    2. Look for any chafed, pierced, pinched, or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the A/C Compressor Clutch and TIPM connectors.
    4. Perform any Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      No 

      • Replace the TIPM in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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