P2138 – Accelerator Pedal Position Sensor (Main and Sub) Range-Performance Problem MMC Colt

FUNCTION

  • Engine-ECU checks the accelerator pedal position sensor output signal characteristics for abnormal conditions.

  • TROUBLE JUDGMENT

  • Ignition switch is in “ON” position
  • Accelerator pedal position sensor (main) output voltage is 0.2 – 4.5 V.
  • Accelerator pedal position sensor (sub) output voltage is 0.2 – 4.5 V.
  • Accelerator pedal position sensor (sub) output voltage minus accelerator pedal position sensor (main) output voltage is 1 volt or higher for 1 second.
  • Accelerator pedal position sensor (main) output voltage minus accelerator pedal position sensor (sub) output voltage is 1 volt or higher for 0.2 seconds.

  • PROBABLE CAUSES

  • Failed accelerator pedal position sensor
  • Harness damage in accelerator pedal position sensor (main and sub) circuit, or connector damage
  • Failed engine-ECU

  • DIAGNOSIS PROCEDURE

    STEP 1. Connector check: B-115 accelerator pedal position connector

    Q. Is the check result normal?

    STEP 2. Check accelerator pedal position sensor itself.

    Q. Is the check result normal?

    STEP 3. Perform resistance measurement at B-115 accelerator pedal position sensor connector.

  • Disconnect connector, and measure at harness side.
  • Resistance between terminal No. 4 and earth.
  • Q. Is the check result normal?

    STEP 4. Connector check: A-09 engine-ECU connector

    Q. Is the check result normal?

    STEP 5. Check harness between B-115 (terminal No. 4) accelerator pedal position sensor connector and A-09 (terminal No. 84) engine-ECU connector.

  • Check earthing line for damage.
  • Q. Is the check result normal?

    STEP 6. M.U.T.-III diagnosis code

  • Reconfirmation of diagnosis code.
  • Q. Is the diagnosis code set?

    STEP 7. Perform resistance measurement at B-115 accelerator pedal position sensor connector.

  • Disconnect connector, and measure at harness side.
  • Resistance between terminal No. 5 and earth.
  • Q. Is the check result normal?

    STEP 8. Connector check: A-09 engine-ECU connector

    Q. Is the check result normal?

    STEP 9. Check harness between B-115 (terminal No. 5) accelerator pedal position sensor connector and A-09 (terminal No. 87) engine-ECU connector.

  • Check earthing line for damage.
  • Q. Is the check result normal?

    STEP 10. Connector check: A-09 engine-ECU connector

    Q. Is the check result normal?

    STEP 11. Check harness between B-115 (terminal No. 2) accelerator pedal position sensor connector and A-09 (terminal No. 85) engine-ECU connector.

  • Check power supply line for damage.
  • Q. Is the check result normal?

    STEP 12. Check harness between B-115 (terminal No. 1) accelerator pedal position sensor connector and A-09 (terminal No. 86) engine-ECU connector.

  • Check power supply line for damage.
  • Q. Is the check result normal?

    STEP 13. Check harness between B-115 (terminal No. 3) accelerator pedal position sensor connector and A-09 (terminal No. 83) engine-ECU connector.

  • Check output line for damage.
  • Q. Is the check result normal?

    STEP 14. Check harness between B-115 (terminal No. 6) accelerator pedal position sensor connector and A-09 (terminal No. 88) engine-ECU connector.

  • Check output line for damage.
  • Q. Is the check result normal?

    Author: admin