U1500 – Column switch time-out MMC Colt




TROUBLE JUDGMENT


COMMENT ON TROUBLE SYMPTOM


PROBABLE CAUSES

  • Malfunction of the lighting switch
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

  • DIAGNOSIS PROCEDURE

    STEP 1. Connector check: B-238 column switch connector

    Q. Is the check result normal?

    STEP 2. Voltage measurement at B-238 column switch connector.

    Q. Is the check result normal?

    STEP 3. Check the wiring harness between B-238 column switch 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. Voltage measurement at B-238 column switch connector.

    Q. Is the check result normal?

    STEP 5. Check the wiring harness between B-238 column switch connector terminal No.9 and the ignition switch (IG1).

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

    STEP 6. Resistance measurement at the B-238 column switch connector.

    Q. Is the check result normal?

    STEP 7. Check the wiring harness between B-238 column switch connector terminal No.4 and the body earth.

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

    STEP 8. Connector check: B-233 ETACS-ECU connector

    Q. Is the check result normal?

    STEP 9. Check the wiring harness from B-233 ETACS-ECU connector terminal Nos. 54 and 64 to B-238 column switch connector terminal Nos. 3 and 8.

  • Check the communication lines for open circuit and short circuit.
  • Q. Is the check result normal?

    STEP 10. Check whether the diagnosis code is reset.

    Q. Is the diagnosis code set?

    Author: admin