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Home >> Chrysler >> 2007 >> Pacifica Base, 3.8 L >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0430 To P0572 >> P0443-EVAP Purge Control Circuit >> Diagnostic Test
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Diagnostic Test

  1. 1) DTC IS ACTIVE 

    Turn the ignition on.

    With the scan tool, Clear DTCs in the Powertrain Control Module (PCM).

    With the scan tool, actuate the Evaporative Purge Valve Solenoid Duty Cycle.

    With the scan tool, select View DTCs.

    Is the status Active for this DTC? 

    Yes 

    1. Go to  2).

    No 

    1. Refer to *CHECKING FOR AN INTERMITTENT DTC .
  2. 2) (K52) EVAP PURGE CONTROL CIRCUIT SHORTED TO VOLTAGE 
    Fig 1: Measuring The Voltage Of The EVAP Purge Control Circuit In The EVAP Purge Solenoid Harness Connector
    GC0049588Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the EVAP Purge Solenoid connector.

    Disconnect the Powertrain Control Module (PCM) connector.

    Measure the voltage of the (K52) EVAP Purge Control circuit in the EVAP Purge Solenoid harness connector.

    Is there any voltage present? 

    Yes 

    1. Repair the (K52) EVAP Purge Control circuit for a short to voltage.
    2. Perform PCM VERIFICATION TEST .

    No 

    1. Go to  3).
  3. 3) (K52) EVAP PURGE CONTROL CIRCUIT SHORTED TO GROUND 
    Fig 2: Measuring The Resistance Between Ground And The EVAP Purge Control Circuit In The EVAP Purge Solenoid Harness Connector
    GC0049589Courtesy of CHRYSLER LLC

    Turn the ignition off.

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

    Is the resistance above 100 ohms? 

    Yes 

    1. Go to  4).

    No 

    1. Repair the (K52) EVAP Purge Control circuit for a short to ground.
    2. Perform PCM VERIFICATION TEST .
  4. 4) (K52) EVAP PURGE CONTROL CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 3: Measuring The Resistance Of The EVAP Purge Control Circuit Between The EVAP Purge Solenoid Harness Connector And The Appropriate Terminal Of Special Tool #8815
    GC0049590Courtesy 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 (K52) EVAP Purge Control circuit between the EVAP Purge Solenoid harness connector and the appropriate terminal of special tool #8815.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go to  5).

    No 

    1. Repair the (K52) EVAP Purge Control circuit for an open circuit or high resistance.
    2. Perform PCM VERIFICATION TEST .
  5. 5) (K70) EVAP PURGE RETURN CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 4: Measuring The Resistance Of The EVAP Purge Control Circuit Between The EVAP Purge Solenoid Harness Connector And The Appropriate Terminal Of Special Tool #8815
    GC0049590Courtesy 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 Return circuit between the EVAP Purge Solenoid harness connector and the appropriate terminal of special tool #8815.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go to  6).

    No 

    1. Repair the (K70) EVAP Purge Return circuit for an open circuit or high resistance.
    2. Perform PCM VERIFICATION TEST .
  6. 6) EVAP PURGE SOLENOID 
    Fig 5: Checking The EVAP Purge Control Circuit In The EVAP Purge Solenoid Harness Connector Using A 12 Volt Test Light Connected To Ground
    GC0049591Courtesy of CHRYSLER LLC

    Connect the Powertrain Control Module (PCM) connector.

    Turn the ignition on.

    With the scan tool, actuate the Evaporative Purge Valve Solenoid Duty Cycle.

    Using a 12 volt test light connected to ground, check the (K52) EVAP Purge Control circuit in the EVAP Purge Solenoid harness connector.

    NOTE: If the DTC is active, the actuation test may not be allowed by the PCM. If may be necessary to clear the DTCs before starting the actuation.
    NOTE: The voltage supplied to the solenoid circuit during the actuation may be less than battery voltage. The test light should be illuminated, but may not be as bright as a direct connection to the battery.

    Is the test light illuminated during the actuation? 

    Yes 

    1. Replace the EVAP Purge Solenoid in accordance with the Service Information.
    2. Perform PCM VERIFICATION TEST .

    No 

    1. Go to  7).
  7. 7) POWERTRAIN CONTROL MODULE (PCM) 

    Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the EVAP Purge Solenoid and the Powertrain Control Module (PCM).

    Look for any chafed, pierced, pinched, or partially broken wires.

    Look for broken, bent, pushed out or corroded terminals.

    Refer to any Technical Service Bulletins that may apply.

    Were any problems found? 

    Yes 

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

    No 

    1. Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
    2. Perform PCM VERIFICATION TEST .
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