Inspection Procedure 3: One of the automatic leveling does not work.: Diagnosis
- STEP 1. Check headlight leveling unit.
Perform a leveling motor drive test of the headlight leveling unit to check that the motor is driven. Refer to HEADLIGHT AUTOMATIC LEVELING MOTOR DRIVE TEST .
Q: Do Headlight leveling unit work normal?
YES: The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS ).
NO (The left leveling motor is not driven). : Go to Step 2.
NO (The right leveling motor is not driven). : Go to Step 5.
- STEP 2. Check headlight automatic leveling-ECU connector C-110, Headlight leveling unit (LH) connector A-37 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is headlight automatic leveling-ECU connector C-110, Headlight leveling unit (LH) connector A-37 in good condition?
YES: Go to Step 3.
NO: Repair the damaged parts.
- STEP 3. Check wiring harness between headlight automatic leveling-ECU connector C-110 (terminal No. 2/3/4) and headlight leveling-unit (LH) connector A-37 (terminal No. 11/10/12).
Q: Is headlight automatic leveling-ECU connector C-110 (terminal No. 2/3/4) and headlight leveling-unit (LH) connector A-37 (terminal No. 11/10/12) in good condition?
YES: Go to Step 4.
NO: Repair the wiring harness.
- STEP 4. Retest the system.
Check that the automatic leveling of the left headlight operates normally.
Q: Is the check result normal?
YES: The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS ).
NO: Replace the headlight assembly (LH).
- STEP 5. Check headlight automatic leveling-ECU connector C-110, Headlight leveling unit (RH) connector A-56 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is headlight automatic leveling-ECU connector C-110, Headlight leveling unit (RH) connector A-56 in good condition?
YES: Go to Step 6.
NO: Repair the damaged parts.
- STEP 6. Check wiring harness between headlight automatic leveling-ECU connector C-110 (terminal No. 11/12/13) and headlight leveling-unit (LH) connector A-56 (terminal No. 11/10/12).
Q: Is headlight automatic leveling-ECU connector C-110 (terminal No. 11/12/13) and headlight leveling-unit (LH) connector A-56 (terminal No. 11/10/12) in good condition?
YES: Go to Step 7.
NO: Repair the wiring harness.
- STEP 7. Retest the system.
Check that the automatic leveling of the right headlight operates normally.
Q: Is the check result normal?
YES: The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS ).
NO: Replace headlight assembly (RH)