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Home >> Chrysler >> 2006 >> PT Cruiser Base, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 1.6L Engine - DTCS B2277 To P0131, Diagnostic Code Index, Pre-Diagnostic Troubleshooting Procedure & Intermittent Condition >> Diagnosis And Testing >> P0036-1/2 O2 Sensor Heater Circuit Open >> Diagnostic Tests

Diagnostic Tests

  1. 1)   GOOD TRIP INDICATED

    Turn the ignition on.

    With the scan tool, read DTCs.

    Does the Good Trip Indicator display NO? 

    Yes 

    1. Go To  3).

    No 

    1. Go To  2).
  2. 2)   O2 SENSOR HEATER OPERATION
    NOTE: Allow the O2 Sensor voltage to stabilize between 0.4 and 0.6 volts before continuing the test.

    Turn the ignition on.

    With the scan tool, actuate the O2 Heater Relay.

    With the scan tool, monitor O2 Sensor voltage for at least 2 minutes.

    Does the voltage stay between 0.4 and 0.6 volts? 

    Yes 

    1. Go To  3).

    No 

    1. Refer to the INTERMITTENT CONDITION  diagnostic procedure.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  3. 3)   O2 HEATER ELEMENT
    NOTE: Allow the O2 Sensor voltage to stabilize between 0.4 and 0.6 volts before continuing the test.

    Turn the ignition off.

    Disconnect the O2 Sensor harness connector.

    Measure the resistance across the O2 Sensor Heater element at the component side of the connector.

    NOTE: Heater Resistance Specification for 1/1 and 1/2 O2 Sensor is from 3 to 20 ohms.

    Is the O2 Sensor Heater element within specification? 

    Yes 

    1. Go To  4).

    No 

    1. Replace the O2 Sensor.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  4. 4)   (K299) O2 SENSOR HEATER CONTROL CIRCUIT OPEN
    Fig 1: MEASURING RESISTANCE OF THE O2 SENSOR HEATER CONTROL CIRCUIT BETWEEN THE O2 SENSOR AND PCM HARNESS CONNECTORS
    GC0041793Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Disconnect the O2 Sensor harness connector.

    Disconnect the PCM harness connector.

    Measure the resistance of the (K299) O2 Sensor Heater Control circuit between the O2 Sensor harness connector and the PCM harness connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go To  5).

    No 

    1. Repair the (K299) O2 Sensor Heater Control circuit for an open.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  5. 5)   (K342) ASD RELAY OUTPUT CIRCUIT OPEN
    Fig 2: MEASURING VOLTAGE OF ASD RELAY OUTPUT CIRCUIT
    GC0041786Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Disconnect the O2 Sensor harness connector.

    With the scan tool, actuate the O2 Heater Relay.

    Measure the voltage of the (K342) ASD Relay Output circuit in the O2 Sensor harness connector.

    Is the voltage above 11.0 volts? 

    Yes 

    1. Go To  6).

    No 

    1. Repair the (K342) ASD Relay Output circuit for an open.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  6. 6)   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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