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Diagnostic Test

WARNING: This page is about a different car, the 2007 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1) VEHICLE HISTORY AND SERVICE BULLETIN INVESTIGATION 

    Ignition on, engine not running.

    With a scan tool, read DTCs and record the related Freeze Frame data if any DTC(s) are present.

    Whether or not any DTC(s) are present you will want to check the following items which may assist in repairing the customer's complaint successfully.

    Check the vehicles repair history.

    If the vehicle has a repair history that pertains to the customer's current complaint, review the repair.

    Inspect the vehicle for any aftermarket accessories that may have been installed incorrectly.

    Check for any service bulletin(s) related to the customer's complaint or DTC(s).

    If a service bulletin applies, follow the instructions per the service bulletin.

    Choose the following scenario that best applies. 

    The service bulletin repaired the customer's complaint. 

    1. Testing complete.

    A DTC is present, no service bulletins apply or the service bulletin didn't repair the customer's complaint. 

    1. Go to  2).
  2. 2) ACTIVE DTC 

    Ignition on, engine not running.

    With the scan tool, read DTCs.

    Is the DTC active at this time? 

    Yes 

    1. Go to  3).

    No 

    1. Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Refer to INTERMITTENT CONDITION .
    2. Perform POWERTRAIN VERIFICATION TEST .
  3. 3) EVAP PURGE SOLENOID OPERATION 
    Fig 1: Checking EVAP Purge Solenoid Operation With 12-Volt Test Light
    GC0041659Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the EVAP Purge Solenoid harness connector.

    Ignition on, engine not running.

    Using a 12-volt test light, jump across the (K52) EVAP Purge Solenoid Control circuit and (K70) EVAP Purge Solenoid Return circuit in the EVAP Purge Solenoid harness connector.

    With a scan tool, actuate the EVAP Purge Solenoid.

    Does the test light flash on and off? 

    Yes 

    1. Replace the EVAP Purge Solenoid.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go to  4).
  4. 4) (K52) EVAP PURGE SOLENOID CONTROL CIRCUIT OPEN 
    Fig 2: Measuring Resistance Of The EVAP Purge Solenoid Control Circuit
    GC0041660Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the C3 PCM harness connector.

    CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.

    Measure the resistance of the (K52) EVAP Purge Solenoid Control circuit from the EVAP Purge Solenoid harness connector to the appropriate terminal of special tool #8815.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go to  5).

    No 

    1. Repair the open in the (K52) EVAP Purge Solenoid Control circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .
  5. 5) (K52) EVAP PURGE SOLENOID CONTROL CIRCUIT SHORTED TO GROUND  
    Fig 3: Measuring Resistance Between Ground & The EVAP Purge Solenoid Control Circuit
    GC0041661Courtesy of CHRYSLER LLC

    Measure the resistance between ground and the (K52) EVAP Purge Solenoid Control circuit in the EVAP Purge Solenoid harness connector.

    Is the resistance below 100 ohms? 

    Yes 

    1. Repair the short to ground in the (K52) EVAP Purge Solenoid Control circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go to  6).
  6. 6) (K70) EVAP PURGE SOLENOID RETURN CIRCUIT OPEN 
    Fig 4: Measuring Resistance Of The EVAP Purge Solenoid Return Circuit
    GC0041662Courtesy of CHRYSLER LLC
    CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.

    Measure the resistance of the (K70) EVAP Purge Solenoid Return circuit from the EVAP Purge Solenoid harness connector to the appropriate terminal of special tool #8815.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go to  7).

    No 

    1. Repair the open in the (K70) EVAP Purge Solenoid Return circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .
  7. 7) (K70) EVAP PURGE SOLENOID RETURN CIRCUIT SHORTED TO GROUND 
    Fig 5: Measuring Resistance Between Ground & EVAP Purge Solenoid Return Circuit
    GC0041663Courtesy of CHRYSLER LLC

    Measure the resistance between ground and the (K70) EVAP Purge Solenoid Return circuit in the EVAP Purge Solenoid harness connector.

    Is the resistance below 100 ohms? 

    Yes 

    1. Repair the short to ground in the (K70) EVAP Purge Solenoid Return circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go to  8).
  8. 8) PCM 
    NOTE: Before continuing, check the PCM 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 there any problems found? 

    Yes 

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

    No 

    1. Replace and program the Powertrain Control Module per Service Information.
    2. Perform POWERTRAIN VERIFICATION TEST .
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