P0222 – Throttle Position Sensor (Sub) Circuit Low Input 3A9 MMC Colt



OPERATION

  • A power voltage of 5 V is applied to the electronic-controlled throttle valve (terminal No. 5) from the engine-ECU (terminal No. 31).
  • The power voltage is earthed to the engine-ECU (terminal No. 30) from the electronic-controlled throttle valve (terminal No. 3).
  • The sensor signal is inputted to the engine-ECU (terminal No. 16) from the electronic-controlled throttle valve output terminal (terminal No. 6).

  • FUNCTION

  • The throttle position sensor converts the throttle valve position into voltage and inputs it into the engine-ECU.
  • The engine-ECU controls the throttle valve position.

  • TROUBLE JUDGMENT

  • Ignition switch is in “ON” position.
  • Throttle position sensor (sub) output voltage is 0.2 V or less for 1.0 second.

  • PROBABLE CAUSES

  • Failed throttle position sensor (sub)
  • Open or shorted throttle position sensor (sub) circuit, harness damage, or connector damage
  • Failed engine-ECU

  • DIAGNOSIS PROCEDURE

    STEP 1. M.U.T.-III data list

  • Item No. 14: Throttle position sensor (sub)
  • Q. Is the check result normal?

    STEP 2. Connector check: A-118 electronic-controlled throttle valve connector

    Q. Is the check result normal?

    STEP 3. Perform voltage measurement at A-118 electronic-controlled throttle valve connector.

  • Disconnect connector, and measure at harness side.
  • Ignition switch: ON
  • Voltage between terminal No. 5 and earth.
  • Q. Is the check result normal?

    STEP 4. Connector check: A-08 engine-ECU connector

    Q. Is the check result normal?

    STEP 5. 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 open/short circuit.
  • Q. Is the check result normal?

    STEP 6. M.U.T.-III data list

  • Item No. 14: Throttle position sensor (sub)
  • Q. Is the check result normal?

    STEP 7. Connector check: A-08 engine-ECU connector

    Q. Is the check result normal?

    STEP 8. 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 9. 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 open/short circuit and damage.
  • Q. Is the check result normal?

    STEP 10. Replace the throttle body assembly

  • After replacing the throttle body assembly, re-check the trouble symptoms.
  • Q. Is the check result normal?

    Author: admin