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Home >> Chrysler >> 2006 >> PT Cruiser Base, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 2.4L Engine - DTCS P1854 To U11OC, Fuel Delivery System Check, Symptom Tests & Verification Tests >> Diagnosis And Testing >> *No Response With A No Start Condition >> Diagnostic Test

Diagnostic Test

  1. 1)  (A209) PCM FUSED B+ CIRCUIT 
    NOTE: The scan tool and cable must be operating properly for the results of this test to be valid.
    NOTE: Make sure the ignition switch was on while trying to communicate with the PCM.

    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.

    Using a 12-volt test light connected to ground probe the appropriate terminal of special tool #8815.

    Does the test light illuminate brightly? 

    Yes 

    1. Go To step  2).

    No 

    1. Repair the open or short to ground in the (A209) Fused B+ circuit. Inspect and replace fuses as necessary.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to POWERTRAIN VERIFICATION TEST) 
  2. 2)  (F202) (F902) PCM FUSED IGNITION SWITCH CIRCUITS 

    Using a 12-volt test light connected to ground, probe the PCM Fused Ignition Switch Output circuit in the appropriate terminals of special tool #8815.

    Does the test light illuminate brightly? 

    Yes 

    1. Go To step  3).

    No 

    1. Repair the (F202) and (F902) Ignition Switch Output circuits. Inspect and replace fuses as necessary.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to POWERTRAIN VERIFICATION TEST) 
  3. 3)  (Z904) PCM GROUND CIRCUITS 

    Using a 12-volt test light connected to battery voltage, probe the (Z904) PCM ground circuits in the appropriate terminals of special tool #8815.

    Does the test light illuminate brightly? 

    Yes 

    1. Go To step  4).

    No 

    1. Repair the PCM ground circuits.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to POWERTRAIN VERIFICATION TEST) 
  4. 4)  (F855) 5-VOLT SUPPLY CIRCUIT 

    Turn the ignition off.

    Connect the PCM harness connectors.

    Disconnect the Crankshaft Position Sensor harness connector.

    Ignition on, engine not running.

    Measure the voltage on the (F855) 5-volt Supply circuit.

    Is the voltage between 4.5 and 5.2 volts? 

    Yes 

    1. Go To step  5).

    No 

    1. Go To step  6).
  5. 5)  CKP SENSOR 

    Turn the ignition off.

    Disconnect the Throttle Body harness connector.

    Ignition on, engine not running.

    Measure the voltage on the (F855) 5-volt Supply circuit in the Throttle Body harness connector.

    Is the voltage between 4.5 and 5.2 volts? 

    Yes 

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

    No 

    1. Replace the Crankshaft Position Sensor.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to POWERTRAIN VERIFICATION TEST) 
  6. 6)  (F855) 5-VOLT SENSOR OPEN/SHORTED 

    Turn the ignition off.

    Disconnect the Throttle Body harness connector.

    Ignition on, engine not running.

    Measure the voltage on the (F855) 5-volt Supply circuit.

    Disconnect all the sensors that use the (F855) 5-volt Supply circuit.

    Did the voltage return to 4.5 to 5.2 volts when disconnecting any of the sensors. 

    Yes 

    1. Replace the sensor that is pulling down the (F855) 5-volt supply.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to POWERTRAIN VERIFICATION TEST) 

    No 

    1. Go To step  7).
  7. 7)  (F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND 

    Turn the ignition off.

    Disconnect PCM harness connectors.

    Disconnect all the sensors that share the (F855) 5-volt Supply circuit.

    Measure the resistance between ground and the (F855) 5-volt Supply circuit at one of the sensor harness connectors.

    Is the resistance below 100 ohms? 

    Yes 

    1. Repair the short to ground in the (F855) 5-volt Supply circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to POWERTRAIN VERIFICATION TEST) 

    No 

    1. Go To step  8).
  8. 8)  (F856) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND 

    Disconnect all the sensors that share the (F856) 5-volt Supply circuit.

    Measure the resistance between ground and the (F856) 5-volt Supply circuit at one of the sensor harness connectors.

    Is the resistance below 100 ohms? 

    Yes 

    1. Repair the short to ground in the (F856) 5-volt Supply circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to POWERTRAIN VERIFICATION TEST) 

    No 

    1. Go To step  9).
  9. 9)  PCM 
    NOTE: Before continuing, check the PCM harness connector 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.

    Were there any problems found? 

    Yes 

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

    No 

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