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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 >> P0123-Throttle Position Sensor Circuit N0.1 High >> Diagnostic Tests

Diagnostic Tests

  1. 1)   TP SENSOR VOLTAGE ABOVE 4.5 VOLTS

    Start the engine.

    With the scan tool, read the TP Sensor No.1 voltage.

    Is the voltage above 4.5 volts? 

    Yes 

    1. Go To  2).

    No 

    1. Go To  8).
  2. 2)   (K22) TP SENSOR SIGNAL NO.1 CIRCUIT SHORTED TO (F855) 5 VOLT SUPPLY CIRCUIT
    Fig 1: MEASURING RESISTANCE BETWEEN THE TP SENSOR SIGNAL NO.1 CIRCUIT AND THE 5 VOLT SUPPLY CIRCUIT
    GC0041836Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Disconnect the ETC Assembly harness connector.

    Disconnect the PCM harness connector.

    Measure the resistance between the (K22) TP Sensor Signal No.1 circuit and the (F855) 5 Volt Supply circuit in the ETC Assembly harness connector.

    Is the resistance below 100 ohms? 

    Yes 

    1. Repair the (K22) Throttle Position Sensor Signal No.1 circuit for a short to the (F855) 5 Volt Supply circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  3).
  3. 3)   (K22) TP SENSOR SIGNAL N0.1 CIRCUIT SHORTED TO BATTERY VOLTAGE
    Fig 2: MEASURING VOLTAGE OF THE TP SENSOR SIGNAL NO.1 CIRCUIT
    GC0041837Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition on.

    Measure the voltage of the (K22) TP Sensor Signal No.1 circuit in the ETC Assembly harness connector.

    Is the voltage above 5.2 volts? 

    Yes 

    1. Repair the (K22) Throttle Position Sensor Signal No.1 circuit for a short to battery voltage.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  4).
  4. 4)   TP SENSOR INTERNAL FAILURE
    Fig 3: CHECKING TP SENSOR FOR INTERNAL FAILURE
    GC0041838Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Reconnect the PCM harness connector.

    Connect a jumper wire between the (K22) TP Sensor Signal No.1 circuit and the (K922) TP Sensor Ground circuit in the ETC Assembly harness connector.

    Turn the ignition on.

    With the scan tool, monitor the TP Sensor No.1 voltage.

    Is the voltage below 0.5 volt? 

    Yes 

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

    No 

    1. Go To  5).
  5. 5)   (K922) SENSOR GROUND CIRCUIT OPEN
    Fig 4: MEASURING RESISTANCE OF TP SENSOR GROUND CIRCUIT
    GC0041835Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Disconnect the PCM harness connector.

    Measure the resistance of the (K922) TP Sensor Ground circuit.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go To  6).

    No 

    1. Repair the open in the (K922) Throttle Position Sensor Ground circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  6. 6)   (K22) TP SENSOR SIGNAL NO.1 CIRCUIT OPEN
    Fig 5: MEASURING RESISTANCE OF THE TPS SIGNAL NO.1 CIRCUIT
    GC0041831Courtesy of DAIMLERCHRYSLER CORP.

    Measure the resistance of the (K22) TP Sensor Signal No.1 circuit.

    Is the resistance below 5 ohms? 

    Yes 

    1. Go To  7).

    No 

    1. Repair the (K22) Throttle Position Sensor Signal No.1 circuit for an open.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  7. 7)   PCM TP SENSOR SIGNAL N0.1 CIRCUIT
    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) .
  8. 8)   THROTTLE POSITION SENSOR SWEEP

    Turn the ignition on.

    With the scan tool, use the ETC System Test to open and close the throttle. Fully open and fully close the throttle several times.

    Monitor the Throttle Position Sensor No.1 Input voltage.

    Is the voltage change smooth as the throttle opens and closes? 

    Yes 

    1. Refer to the INTERMITTENT CONDITION  diagnostic procedure.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

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