DTC 11: TP Sensor System (Short Circuit): Diagnosis

Required Special Tool:

• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness B

1. Using scan tool MB991958, check data list item 11: TP Sensor.
   CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
   1. Connect scan tool MB991958 to the data link connector.
   2. Turn the ignition switch to the "ON" position.
   3. Set scan tool MB991958 to data reading mode for item 11: TP Sensor.
      • With the throttle valve in idle position, voltage should be between 535 and 735 mV.
      • With the throttle valve in full-open position, voltage should be between 4,500 and 5,500 mV.
   4. Turn the ignition switch to the "LOCK" (OFF) position.
   Fig 1: Connecting Scan Tool To Data Link Connector

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   Q: Is the measured voltage between 535 and 735 mV at idle, and between 4,500 and 5,500 mV in the full-open position?

   YES : It can be assumed that this malfunction is intermittent.

   Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS .

   NO : Go to Step 2.

2. Measure the TP sensor output voltage at TP sensor connector B-07 by backprobing.
   Fig 2: Identifying Terminals Of TP Sensor Connector B-07

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   1. Do not disconnect connector B-07.
   2. Turn the ignition switch to the "ON" position.
   3. Measure the voltage between terminal 3 and ground by backprobing.
      • With the throttle valve in the idle position, voltage should measure between 0.535 and 0.735 volts.
      • With the throttle valve in the full-open position, voltage should measure between 4.5 and 5.5 volts.
   4. Turn the ignition switch to the "LOCK" (OFF) position.
   Fig 3: Measuring Voltage Between B-07 Connector Terminal 3 And Ground

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   Q: Is the measured voltage between 0.535 and 0.735 volt at idle, and between 4.5 and 5.5 volts in the full-open position?

   YES : Go to Step 3.

   NO : Go to Step 8.

3. Measure the TP sensor output voltage at PCM connector C-57 < 2.4L Engine> or C-59 < 3.0L Engine> by backprobing.
   Fig 4: Identifying Terminals Of PCM Connector C-57 (2.4L Engine) Or C-59 (3.0L Engine)

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   1. Do not disconnect connector C-57 < 2.4L Engine> or C-59 < 3.0L Engine>.
   2. Turn the ignition switch to the "ON" position.
   3. Measure the voltage between terminal 78 and ground by backprobing.
      • With the throttle valve in the idle position, voltage should measure between 0.535 and 0.735 volts.
      • With the throttle valve in full-open position, voltage should measure between 4.5 and 5.5 volts.
   4. Turn the ignition switch to the "LOCK" (OFF) position.
   Fig 5: Measuring Voltage Between Terminal 78 And Ground

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   Q: Is the measured voltage between 0.535 and 0.735 volt at idle, and between 4.5 and 5.5 volts in the full-open position?

   YES : Go to Step 4.

   NO : Go to Step 6.

4. Check TP sensor connector B-07 and PCM connector C-57 < 2,4L Engine> or C-59 < 3.0L Engine> for loose, corroded or damaged terminals, or terminals pushed back in the connector.
   Fig 6: Identifying Terminals Of TP Sensor Connector B-07 (2.4L And 3.0L Engine)

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   Fig 7: Identifying Terminals Of PCM Connector C-57 (2.4L Engine) Or C-59 (3.0L Engine)

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   Q: Are the connectors and terminals in good condition?

   YES : Go to Step 5.

   NO : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .

5. Using scan tool MB991958, check data list item 11: TP Sensor.
   CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
   Fig 8: Connecting Scan Tool To Data Link Connector

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   1. Connect scan tool MB991958 to the data link connector.
   2. Turn the ignition switch to the "ON" position.
   3. Set scan tool MB991958 to the data reading mode for item 11: TP Sensor.
      • With the throttle valve in the idle position, voltage should be between 535 and 735 mV.
      • With the throttle valve in the full-open position, voltage should be between 4,500 and 5,500 mV.
   4. Turn the ignition switch to the "LOCK" (OFF) position.

      Q: Is the measured voltage between 535 and 735 mV at idle, and between 4,500 and 5,500 mV in the full-open position?

      YES : It can be assumed that this malfunction is intermittent.

      Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS .

      NO : Replace the PCM.

6. Check TP sensor connector B-07 and PCM connector C-57 < 2.4L Engine> or C-59 < 3.0L Engine> for loose, corroded or damaged terminals, or terminals pushed back in the connector.
   Fig 9: Identifying Terminals Of TP Sensor Connector B-07 (2.4L And 3.0L Engine)

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   Fig 10: Identifying Terminals Of PCM Connector C-57 (2.4L Engine) Or C-59 (3.0L Engine)

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   Q: Are the connectors and terminals in good condition?

   YES : Go to Step 7.

   NO : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .

7. Check the harness for damage between TP sensor connector B-07 terminal 3 and PCM connector C-57 < 2.4L Engine> or C-59 < 3.0L Engine> terminal 78.
   Fig 11: Identifying Terminals Of TP Sensor Connector B-07 (2.4L And 3.0L Engine)

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   Fig 12: Identifying Terminals Of PCM Connector C-57 (2.4L Engine) Or C-59 (3.0L Engine)

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   Q: Is the harness wire in good condition?

   YES : Go to Step 5.

   NO : Repair or replace the harness wire.

8. Check TP sensor connector B-07 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
   Fig 13: Identifying Terminals Of TP Sensor Connector B-07 (2.4L And 3.0L Engine)

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   Q: Are the connector and terminals in good condition?

   YES : Go to Step 9.

   NO : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .

9. Check the resistance of the ground circuit at TP sensor connector B-07.
   Fig 14: Identifying Terminals Of TP Sensor Connector B-07 (2.4L And 3.0L Engine)

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   1. Disconnect TP sensor connector B-07 and measure at the harness side.
   2. Check the resistance between terminal 1 and ground.
      • The resistance should measure less than 2 ohms.
   Fig 15: Checking Resistance Between B-07 Connector Terminal 1 And Ground

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   Q: Is the resistance less than 2 ohms?

   YES : Go to Step 12.

   NO: Go to Step 10.

10. Check PCM connector C-54 < 2.4L Engine> or C-55 < 3.0L Engine> for loose, corroded or damaged terminals, or terminals pushed back in the connector.
    Fig 16: Identifying Terminals Of PCM Connector C-54 (2.4L Engine) Or C-55 (3.0L Engine)

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    Q: Are the connector and terminals in good condition?

    YES : Go to Step 11.

    NO : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .

11. Check the harness for an open circuit or damage between TP sensor connector B-07 terminal 1 and PCM connector C-54 < 2.4L Engine> or C-55 < 3.0L Engine> terminal 57.
    Fig 17: Identifying Terminals Of TP Sensor Connector B-07 (2.4L And 3.0L Engine)

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    Fig 18: Identifying Terminals Of PCM Connector C-54 (2.4L Engine) Or C-55 (3.0L Engine)

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    Q: Is the harness wire in good condition?

    YES : Go to Step 5.

    NO : Repair or replace the harness wire.

12. Measure the power supply voltage at PCM connector C-54 < 2.4L Engine> or C-55 < 3.0L Engine> by backprobing.
    Fig 19: Identifying Terminals Of PCM Connector C-54 (2.4L Engine) Or C-55 (3.0L Engine)

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    1. Do not disconnect connector C-54 < 2.4L Engine> or C-55 < 3.0L Engine>.
    2. Turn the ignition switch to the "ON" position.
    3. Measure the voltage between terminal 46 and ground by backprobing.
       • The voltage should measure between 4.9 and 5.1 volts.
    4. Turn the ignition switch to the "LOCK" (OFF) position.
    Fig 20: Measuring Voltage Between Terminal 46 And Ground

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    Q: Is the measured voltage between 4.9 and 5.1 volts?

    YES : Go to Step 15.

    NO: Go to Step 13.

13. Check PCM connector C-54 < 2.4L Engine> or C-55 < 3.0L Engine> for loose, corroded or damaged terminals, or terminals pushed back in the connector.
    Fig 21: Identifying Terminals Of PCM Connector C-54 (2.4L Engine) Or C-55 (3.0L Engine)

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    Q: Are the connector and terminals in good condition?

    YES: Go to Step 14.

    NO : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .

14. Check harness for damage between TP sensor connector B-07 terminal 4 and PCM connector C-54 < 2.4L Engine> or C-55 < 3.0L Engine> terminal 46.
    Fig 22: Identifying Terminals Of TP Sensor Connector B-07 (2.4L And 3.0L Engine)

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    Fig 23: Identifying Terminals Of PCM Connector C-54 (2.4L Engine) Or C-55 (3.0L Engine)

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    Q: Is the harness wire in good condition?

    YES : Go to Step 5.

    NO : Repair or replace the harness wire.

15. Check the TP sensor.
    Fig 24: Identifying Terminals Of TP Sensor Connector B-07 (2.4L And 3.0L Engine)

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    1. Disconnect connector B-07 and measure at the TP sensor side.
    2. Measure the resistance between TP sensor connector terminal 1 and 4.

       Standard value: 3.5 - 6.5 kΩ

       Fig 25: Measuring Resistance Between TP Sensor Connector Terminal 1 And 4

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    3. Measure the resistance between TP sensor connector terminals 1 and 3.
       Fig 26: Measuring Resistance Between TP Sensor Connector Terminal 1 And 3

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    4. Move the throttle valve from the idle position to the full-open position.
    • The resistance should change smoothly in proportion to the opening angle of the throttle valve.

    Q: Does the resistance change smoothly between 3.5 - 6.5 kΩ in proportion to the opening angle of the throttle valve?

    YES : Go to Step 16.

    NO : Replace the TP sensor. Refer to THROTTLE BODY ASSEMBLY < 2.4L Engine> or THROTTLE BODY ASSEMBLY < 3.0L Engine> .

16. Check PCM connectors C-54 < 2.4L Engine> or C-55 < 3.0L Engine> and C-57 < 2.4L Engine> or C-59 < 3.0L Engine> for loose, corroded or damaged terminals, or terminals pushed back in the connector.
    Fig 27: Identifying Terminals Of PCM Connector C-54 (2.4L Engine) Or C-55 (3.0L Engine) And Connector C-57 (2.4L Engine) Or C-59 (3.0L Engine)

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    Q: Are the connectors and terminals in good condition?

    YES : Go to Step 17.

    NO : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .

17. Check the harness for damage between TP sensor connector B-07 terminal 3 and PCM connector C-57 < 2.4L Engine> or C-59 < 3.0L Engine> terminal 78.
    Fig 28: Identifying Terminals Of TP Sensor Connector B-07 (2.4L And 3.0L Engine)

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    Fig 29: Identifying Terminals Of PCM Connector C-57 (2.4L Engine) Or C-59 (3.0L Engine)

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    Q: Is the harness wire in good condition?

    YES: Go to Step 18.

    NO : Repair or replace the harness wire.

18. Check the harness for damage between TP sensor connector B-07 terminal 1 and PCM connector C-57 < 2.4L Engine> or C-59 < 3.0L Engine> terminal 57.
    Fig 30: Identifying Terminals Of TP Sensor Connector B-07 (2.4L And 3.0L Engine)

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    Fig 31: Identifying Terminals Of PCM Connector C-57 (2.4L Engine) Or C-59 (3.0L Engine)

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    Q: Is the harness wire in good condition?

    YES : Adjust the TP sensor. Refer to THROTTLE POSITION SENSOR ADJUSTMENT < 2.4L Engine> or THROTTLE POSITION SENSOR ADJUSTMENT < 3.0L Engine> .

    NO : Repair or replace the harness wire.