Code No.23 Height Sensor Power Supply Line Short to Earth


caution Before replacing the ECU, ensure that the communication circuit is normal.










TROUBLE JUDGMENT



COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of the front height sensor
  • Malfunction of the rear height sensor
  • Malfunction of the headlamp automatic levelling-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE


STEP 1. Connector check: A-54 front height sensor connector, C-14 headlamp automatic levelling-ECU connector


Q. Is the check result normal?





STEP 2. Wiring harness check between the A-54 front height sensor connector terminal No. 1/3 and the C-14 headlamp automatic levelling-ECU connector terminal No. 15/19.


note Before the wiring harness check, check the intermediate connector A-01, and repair that if necessary.

  • Check the power supply lines and the earth lines for short circuit.

Q. Is the check result normal?





STEP 3. Check whether the diagnosis code is reset.


Q. Is diagnosis code No. 23 set?





STEP 4. Connector check: F-02 rear height sensor connector, C-14 headlamp automatic levelling-ECU connector


Q. Is the check result normal?





STEP 5. Wiring harness check between the F-02 rear height sensor connector terminal No. 1/3 and the C-14 headlamp automatic levelling-ECU connector terminal No. 16/20.


note Before the wiring harness check, check the intermediate connectors C-31, D-12 and F-03, and then repair that if necessary.

  • Check the power supply lines and the earth lines for short circuit.

Q. Is the check result normal?





STEP 6. Check whether the diagnosis code is reset.


Q. Is diagnosis code No. 23 set?





STEP 7. Front height sensor check



Q. Is the check result normal?





STEP 8. Rear height sensor check



Q. Is the check result normal?





STEP 9. Check whether the diagnosis code is reset.


Q. Is diagnosis code No. 23 set?