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Home >> Jeep >> 2005 >> Wrangler X, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 628 (Powertrain Diagnostic Procedures - DRIVEABILITY - NGC Symptoms & Diagnostic Tests (DTCS P0016 To P0563)) >> DRIVEABILITY - NGC - Diagnostic Tests >> P0443-EVAP Purge Solenoid Circuit (Gas - NGC) >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Dodge Pickup and 2004 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to VERIFICATION TESTS for appropriate verification test procedures.
  1. Check for any related TSBs before continuing.

    Ignition on, engine not running.

    With the DRBIII®, read DTCs and record the related Freeze Frame data.

    Is the Good Trip Counter displayed and equal to zero?

    1. Yes --> Go To 2
    2. No --> Refer to the SYMPTOM: INTERMITTENT CONDITION  Symptom (Diagnostic Procedure).

      Perform POWERTRAIN VERIFICATION TEST VER - 5 .

  2. 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 Sol Control circuit and (K70) Evap Purge Sol Signal circuit in the EVAP Purge Solenoid harness connector.

    With the DRBIII®, actuate the EVAP Purge Solenoid.

    Does the test light flash on and off?

    1. Yes --> Replace the EVAP Purge Solenoid.

      Perform POWERTRAIN VERIFICATION TEST VER - 5 .

    2. No --> Go To 3
  3. Turn the ignition off.

    Disconnect the PCM harness connectors.

    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 Sol Control circuit from the Evap Purge Solenoid harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms?

    1. Yes --> Go To 4
    2. No --> Repair the open in the (K52) EVAP Purge Sol Control circuit.

      Perform POWERTRAIN VERIFICATION TEST VER - 5 .

  4. Measure the resistance between ground and the (K52) Evap Purge Sol Control circuit at the Evap Purge Solenoid harness connector.

    Is the resistance below 100 ohms?

    1. Yes --> Repair the short to ground in the (K52) EVAP Purge Sol Control circuit.

      Perform POWERTRAIN VERIFICATION TEST VER - 5 .

    2. No --> Go To 5
    5. 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.
  5. Measure the resistance of the (K70) Evap Purge Sol Return circuit from the EVAP Purge Solenoid harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms?
    1. Yes --> Go To 6
    2. No --> Repair the open in the (K70) Evap Purge Sol Return circuit.

      Perform POWERTRAIN VERIFICATION TEST VER - 5 .

  6. Measure the resistance between ground and the (K70) Evap Purge Sol Return circuit at the Evap Purge Solenoid harness connector.

    Is the resistance below 100 ohms?

    1. Yes --> Repair the short to ground in the (K70) Evap Purge Sol Return circuit.

      Perform POWERTRAIN VERIFICATION TEST VER - 5 .

    2. No --> Go To 7
    7. NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
  7. Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

    If there are no possible causes remaining, view repair.

    1. Repair
      1. Replace and program the Powertrain Control Module per Service Information.
      2. Perform POWERTRAIN VERIFICATION TEST VER - 5 .
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