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Home >> Jeep >> 2005 >> Wrangler Rubicon, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 549 (DTCS P0308 To P0462) >> Diagnosis And Testing >> P0443-EVAP Purge Solenoid Circuit >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1)  ACTIVE DTC 

    Ignition on, engine not running.

    With the scan tool, read DTCs.

    Is the DTC active at this time? 

    Yes 

    1. Go To step  2).

    No 

    1. Refer to INTERMITTENT CONDITION .
    2. Perform POWERTRAIN VERIFICATION TEST .
  2. 2)  EVAP PURGE SOLENOID OPERATION 
    Fig 1: Checking EVAP Purge Solenoid
    GC0002874Courtesy of DAIMLERCHRYSLER CORP.

    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 Signal 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 step  3).
  3. 3)  (K52) EVAP PURGE SOLENOID CONTROL CIRCUIT OPEN 
    Fig 2: Checking EVAP Purge Solenoid Control Circuit
    GC0011582Courtesy of DAIMLERCHRYSLER CORP.

    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 step  4).

    No 

    1. Repair the open in the (K52) EVAP Purge Solenoid Control circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .
  4. 4)  (K52) EVAP PURGE SOLENOID CONTROL CIRCUIT SHORTED TO GROUND  
    Fig 3: Checking EVAP Purge Solenoid Signal Circuit
    GC0002875Courtesy of DAIMLERCHRYSLER CORP.

    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 step  5).
  5. 5)  (K70) EVAP PURGE SOLENOID SIGNAL CIRCUIT OPEN 
    Fig 4: Checking EVAP Purge Solenoid Signal Circuit
    GC0011583Courtesy of DAIMLERCHRYSLER CORP.
    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 Signal 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 step  6).

    No 

    1. Repair the open in the (K70) Evap Purge Solenoid Signal circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .
  6. 6)  (K70) EVAP PURGE SOLENOID SIGNAL CIRCUIT SHORTED TO GROUND 
    Fig 5: Checking EVAP Purge Solenoid Signal Circuit
    GC0002876Courtesy of DAIMLERCHRYSLER CORP.

    Measure the resistance between ground and the (K70) Evap Purge Solenoid Signal 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 Signal circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go To step  7).
  7. 7)  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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