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Home >> Chrysler >> 2006 >> PT Cruiser Base, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 1.6L Engine - DTCS P0646 To P127C >> Diagnosis And Testing >> P0687-ASD Relay Control Circuit High >> Diagnostic Test

Diagnostic Test

  1. 1)  ASD RELAY OPERATION 

    Turn the ignition on.

    With a scan tool, actuate the ASD Relay.

    Is the ASD Relay operating? 

    Yes 

    1. Go To  2).

    No 

    1. Go To  3).
  2. 2)  ASD RELAY INTERMITTENT OPERATION 

    Turn the ignition on.

    With the scan tool, actuate the ASD Relay.

    Wiggle the wiring harness from the ASD Relay to the PCM while the relay is actuating.

    Did the ASD Relay stop when wiggling the wiring harness? 

    Yes 

    1. Repair as necessary.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Refer to the INTERMITTENT CONDITION diagnostic procedure.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  3. 3)  (K334) ASD RELAY CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE 
    Fig 1: CHECKING ASD RELAY CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE
    GC0041951Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Disconnect the PCM harness connector.

    Remove the ASD Relay.

    Turn the ignition on.

    Connect a jumper wire between cavity 30 and 87 of the ASD Relay connector.

    Using a voltmeter, measure the voltage of the (K334) ASD Relay Control circuit.

    Does the test light illuminate? 

    Yes 

    1. Repair the short to voltage in the (K334) ASD Relay Control circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  4).
  4. 4)  ASD RELAY 

    Turn the ignition off.

    Connect the PCM harness connector.

    Substitute the ASD Relay with a known good relay.

    Turn the ignition on.

    With the scan tool, actuate the ASD Relay.

    Is the ASD Relay operating? 

    Yes 

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

    No 

    1. Go To  5).
  5. 5)  PCM 
    NOTE: Before Continuing: Disconnect the PCM harness connector and check the related wiring 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.

    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 STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING) .
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
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