Posted in Mitsubishi Colt

P2135 – Throttle Position Sensor (Main and Sub) Range-Performance Problem 3A9 MMC Colt

 Posted by  Posted on September 27, 2020

FUNCTION

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

    • TROUBLE JUDGMENT

  • Ignition switch is in “ON” position.
  • Throttle position sensor (main) output voltage is 0.35 – 2.5 V.
  • Throttle position sensor (sub) output voltage is 2.25 – 4.8 V
  • Voltage obtained with the formula given below is more than 0.3 V: throttle position sensor (main) voltage – throttle position sensor (sub) voltage]

    • PROBABLE CAUSES

  • Failed throttle position sensor
  • Open/short circuit in throttle position sensor circuit or loose connector contact

    • DIAGNOSIS PROCEDURE

    STEP 1. Connector check: A-08 engine-ECU connector and A-118 electronic-controlled throttle valve connector

    Q. Is the check result normal?

    STEP 2. Check harness between A-118 (terminal No. 4) electronic-controlled throttle valve connector and A-08 (terminal No. 15) engine-ECU connector.

  • Check output line for damage.

    • Q. Is the check result normal?

    STEP 3. Check harness between A-118 (terminal No. 6) electronic-controlled throttle valve connector and A-08 (terminal No. 16) engine-ECU connector.

  • Check output line for damage.

    • Q. Is the check result normal?

    STEP 4. Check harness between A-118 (terminal No. 5) electronic-controlled throttle valve connector and A-08 (terminal No. 31) engine-ECU connector.

  • Check power supply line for damage.

    • Q. Is the check result normal?

    STEP 5. Check harness between A-118 (terminal No. 3) electronic-controlled throttle valve connector and A-08 (terminal No. 30) engine-ECU connector.

  • Check earthing line for damage.

    • Q. Is the check result normal?

    STEP 6. Replace throttle body assembly.

  • After throttle body assembly is replaced, re-check for trouble symptom.

    • Q. Does trouble system persist?

    Author: admin