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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 >> P1279-Starter Control Circuit 2 Open (TIPM) >> Diagnostic Test

Diagnostic Test

  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)  (T40) STARTER FEED CIRCUIT OPEN 

    Turn the ignition.

    Disconnect the Starter Relay.

    Disconnect the C10 TIPM harness connector.

    Measure the resistance of the (T40) Starter Relay Output circuit between the C10 TIPM harness connector and the Starter Relay harness connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go To  3).

    No 

    1. Repair the open in the (T40) Starter Relay Output circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  3. 3)  (T750) STARTER RELAY OUTPUT CIRCUIT OPEN 

    Disconnect the Starter Solenoid connector.

    Measure the resistance of the (T750) Starter Relay Output circuit between the Starter Solenoid harness connector and the Starter Relay harness connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go To  4).

    No 

    1. Repair the open in the (T750) Starter Relay Output circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  4. 4)  TIPM OPERATION 

    Reconnect the C10 TIPM harness connector.

    Using a 12-volt test light connected ground, probe the (T40) Stater Relay Output circuit in the Starter Relay harness connector.

    Crank the engine.

    Does the test light illuminate? 

    Yes 

    1. Go To  5).

    No 

    1. Replace the TIPM is accordance with the Service information
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  5. 5)  STARTER RELAY 

    Turn the ignition off.

    Install the Starter Relay.

    NOTE: The Stater Solenoid harness connector must still be disconnected at this time.

    Crank the engine.

    Using a 12-volt test light connected ground, probe the (T750) Stater Relay Output circuit in the Starter Solenoid harness connector.

    Does the test light illuminate? 

    Yes 

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

    No 

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