Posted in Mitsubishi Colt

B1086, B1087 – Motor output system for air outside-inside air circulation switching damper MMC Colt

 Posted by  Posted on September 28, 2020

COMMENTS ON TROUBLE SYMPTOM

PROBABLE CAUSE

  • Malfunction of the inside/outside air selection damper control motor
  • Damaged wiring harness or connectors
  • Malfunction of the semi automatic air conditioner control panel (A/C-ECU)

    • DIAGNOSIS PROCEDURE

    STEP 1. M.U.T.-III actuator test

  • Item 37, 38: inside/outside air selection damper control motor

    • Q. Does the blower motor work normally?

    STEP 2. Connector check: B-11 inside/outside air selection damper control motor connector

    Q. Is the check result normal?

    STEP 3. Voltage measurement at B-11 inside/outside air selection damper control motor connector.

    Q. Is the check result normal?

    STEP 4. Check the wiring harness between B-11 inside/outside air selection damper control motor connector terminal No.1 and the ignition switch (IG2).

  • Check the blower relay power supply line for open circuit.

    • Q. Is the check result normal?

    STEP 5. Check the inside/outside air selection damper control motor.

    Q. Is the inside/outside air selection damper control motor in good condition?

    STEP 6. Connector check: B-113 A/C-ECU connector

    Q. Is the check result normal?

    STEP 7. Check the wiring harness between B-113 A/C-ECU connector (terminals 17 and 9) and B-11 inside/outside air selection damper control motor connector (terminals 4 and 5).

  • Check the inside/outside air selection damper control motor earth line for open or short circuit.

    • Q. Is the check result normal?

    STEP 8. Check whether the diagnosis code is reset.

    Q. Is the diagnosis code set?

    Author: admin