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Home >> Chrysler >> 2007 >> PT Cruiser Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0691 To P127F >> P1274-A/C Clutch Control Circuit 2 Open (TIPM) >> Diagnostic Test
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Diagnostic Test

  1. 1) A/C CLUTCH OPERATION 

    Ignition on, engine not running.

    With a scan tool under the PCM Actuators, actuate the A/C Clutch.

    Is the A/C Clutch operating? 

    Yes 

    1. Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Refer to INTERMITTENT CONDITION .
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go to  2).
  2. 2) A/C CLUTCH CONTROL OPERATION FROM THE PCM 

    Turn the ignition off.

    Disconnect the C1 TIPM harness connector.

    Ignition on, engine not running.

    Using the scan tool under the PCM Actuators, actuate the A/C Clutch.

    With a 12-volt test light connected to ground, probe the (C3) A/C Clutch Control circuit in the C1 TIPM harness connector.

    Does the test light illuminate brightly and flash on an off? 

    Yes 

    1. Go to  3).

    No 

    1. Perform the Diagnostic Procedure for P0645-A/C CLUTCH CONTROL CIRCUIT. Refer to P0645-A/C CLUTCH RELAY CIRCUIT .
  3. 3) (C3) A/C CLUTCH CONTROL OUTPUT CIRCUIT OPEN 
    Fig 1: Measuring Resistance Of A/C Clutch Control Output Circuit
    GC0041766Courtesy of CHRYSLER LLC

    Turn the ignition off

    Disconnect the TIPM C10 harness connector.

    Disconnect the A/C Compressor Clutch harness connector.

    Measure the resistance of the (C3) A/C Clutch Control Output circuit between the TIPM C10 harness connector and the A/C Compressor Clutch harness connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go to  4).

    No 

    1. Repair the short to ground in the (C3) A/C Clutch Control Output circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .
  4. 4) A/C CLUTCH 
    Fig 2: Checking A/C Compressor Clutch Control Output Circuit Operation
    GC0041763Courtesy of CHRYSLER LLC

    Connect the C1 and C10 TIPM harness connectors.

    Ignition on, engine not running.

    Using the scan tool under the TIPM Actuators, actuate the A/C Clutch.

    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.

    Does the test light illuminate brightly and flash on and off? 

    Yes 

    1. Replace the A/C Clutch in accordance with the Service Information.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go to  5).
  5. 5) TOTALLY INTEGRATED POWER MODULE 
    NOTE: Before continuing, check the TIPM harness connector terminals for corrosion, damage or terminal push out. Repair as necessary.

    Using the schematics as a guide, inspect the wire harness and connectors.

    Pay particular attention to all Power and Ground circuits.

    Were any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Replace the Totally Integrated Power Module in accordance with the Service Information.
    2. Perform POWERTRAIN VERIFICATION TEST .
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