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Home >> Chrysler >> 2006 >> PT Cruiser Base, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 2.4L Engine - DTCS P0128 To P0325 >> Diagnosis And Testing >> P0243-WASTEGATE Solenoid Circuit >> Possible Causes

Possible Causes

Possible Causes 
(Z901) WASTEGATE SOLENOID GROUND CIRCUIT
(K137) WASTE SOL CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE
(K137) WASTEGATE SOL CONTROL CIRCUIT OPEN
(K137) WASTEGATE SOL CONTROL CIRCUIT SHORTED TO GROUND
WASTEGATE SOLENOID
PCM
  1. 1)  ACTIVE DTC 

    Ignition on, engine not running.

    With a scan tool, read DTCs.

    Is the DTC active at this time? 

    Yes 

    1. Go To  2).

    No 

    1. Refer to the INTERMITTENT CONDITION diagnostic procedure.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  2. 2)  WASTEGATE SOLENOID OPERATION 
    Fig 1: CHECKING WASTEGATE SOLENOID OPERATION
    GC0041622Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Disconnect the Wastegate Solenoid harness connector.

    Using a 12-volt test light, jumper across the Wastegate Solenoid harness connector.

    NOTE: While actuating the solenoid wiggle the related wiring harness.

    Turn the ignition on.

    With the scan tool, actuate the Wastegate Solenoid.

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

    Yes 

    1. Replace the Wastegate Solenoid.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  3).
  3. 3)  (Z901) WASTEGATE SOLENOID GROUND CIRCUIT 
    Fig 2: CHECKING WASTEGATE SOLENOID GROUND CIRCUIT
    GC0041623Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Using a 12-volt test light connected to battery voltage, probe the (Z901) Ground circuit in the Wastegate harness connector.

    Does the test light illuminate brightly? 

    Yes 

    1. Go To  4).

    No 

    1. Repair the (Z901) Ground circuit for an open.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  4. 4)  (K137) WASTEGATE SOL CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE 
    Fig 3: MEASURING FOR VOLTAGE AT THE WASTEGATE SOL CONTROL CIRCUIT
    GC0041624Courtesy of DAIMLERCHRYSLER CORP.
    NOTE: The Wastegate Sol Control circuit is a high side control circuit. When the circuit is operating normally voltage will be present.

    Disconnect the PCM harness connectors.

    Turn the ignition on

    Measure the voltage of the (K137) Wastegate Sol Control circuit in the Wastegate Solenoid harness connector.

    Does the voltmeter indicate any voltage present? 

    Yes 

    1. Repair the short to voltage in the (K137) Wastegate Sol Control circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  5).
  5. 5)  (K137) WASTEGATE SOL CONTROL CIRCUIT OPEN 
    Fig 4: MEASURING RESISTANCE OF THE WASTEGATE SOL CONTROL CIRCUIT
    GC0041625Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    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 (K137) Wastegate Sol Control circuit from the Wastegate Solenoid harness connector to the appropriate terminal of special tool #8815.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go To  6).

    No 

    1. Repair the open in the (K137) Wastegate Sol Control circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  6. 6)  (K137) WASTEGATE SOL CIRCUIT SHORTED TO GROUND 
    Fig 5: MEASURING RESISTANCE BETWEEN GROUND AND THE WASTEGATE SOL CONTROL CIRCUIT
    GC0041626Courtesy of DAIMLERCHRYSLER CORP.

    Measure the resistance between ground and the (K137) Wastegate Sol Control circuit at the Wastegate Solenoid harness connector.

    Is the resistance below 100 ohms? 

    Yes 

    1. Repair the short to ground in the (K137) Wastegate Sol Control circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  7).
  7. 7)  PCM 
    NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

    If there are no possible causes remaining, view repair. 

    Repair 

    1. Replace and program the Powertrain Control Module in accordance with the Service Information. Refer to MODULE-POWERTRAIN CONTROL and STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING .
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
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