U1504 – Rain light sensor time-out MMC Colt




TROUBLE JUDGMENT


COMMENT ON TROUBLE SYMPTOM


PROBABLE CAUSES

  • Malfunction of the rain light sensor
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

  • DIAGNOSIS PROCEDURE

    STEP 1. Connector check: C-39 rain light sensor connector

    Q. Is the check result normal?

    STEP 2. Voltage measurement at C-39 rain light sensor connector.

    Q. Is the check result normal?

    STEP 3. Check the wiring harness between C-39 rain light sensor connector terminal No.1 and the fusible link (1).

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

    STEP 4. Resistance measurement at the C-39 rain light sensor connector.

    Q. Is the check result normal?

    STEP 5. Check the wiring harness between C-39 rain light sensor connector terminal No.3 and the body earth.

  • Check the earth wires for open circuit.
  • Q. Is the check result normal?

    STEP 6. Connector check: B-233 ETACS-ECU connector

    Q. Is the check result normal?

    STEP 7. Check the wiring harness from B-233 ETACS-ECU connector terminal No. 54 to C-39 rain light sensor connector terminal No. 2.

  • Check the communication lines for open circuit and 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