Posted in Mitsubishi Colt

B1084, B1085 – Rear window defogger output system MMC Colt

 Posted by  Posted on September 28, 2020

COMMENTS ON TROUBLE SYMPTOM

PROBABLE CAUSE

  • Malfunction of the rear window defogger relay
  • Damaged wiring harness or connectors
  • Malfunction of the semi automatic air conditioner control panel (A/C-ECU)

    • DIAGNOSIS PROCEDURE

    STEP 1. Connector check: B-225 rear window defogger relay connector

    Q. Is the check result normal?

    STEP 2. Check the rear window defogger relay continuity.

    Q. Is the rear window defogger relay continuity in good condition?

    STEP 3. Voltage measurement at B-225 rear window defogger relay connector.

    Q. Is the check result normal?

    STEP 4. Check the wiring harness between B-225 rear window defogger relay 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. Connector check: B-113 A/C-ECU connector

    Q. Is the check result normal?

    STEP 6. Check the wiring harness between B-113 A/C-ECU connector terminal No.8 and B-225 rear window defogger relay connector terminal No.2.

  • Check the rear window defogger earth line for open and short circuit.

    • Q. Is the check result normal?

    STEP 7. Check whether the diagnosis code is reset.

    Q. Is the diagnosis code set?

    Author: admin