Inspection Procedure 2: One of the licence plate lamps does not illuminate.


COMMENTS ON TROUBLE SYMPTOM


If any of the licence lamps does not illuminate normally, wiring harness, connector(s) or the bulb may be defective.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Bulb check
Check the bulb(s) of the licence plate lamp that does not illuminate.

Q. Is the check result normal?
Go to Step 2.
Replace the bulb(s) of the licence plate lamp that does not illuminate.

STEP 2. Resistance measurement at licence plate lamp connector (LH) or licence plate lamp connector (RH)
(1)Disconnect the connector and measure at the wiring harness side.
(2)Measure the resistance between the connector of lamp which does not illuminate and the body earth.

  • Measure the resistance between the licence plate lamp connector (LH) connector (earth terminal) and the body earth.
  • Measure the resistance between the licence plate lamp connector (RH) connector (earth terminal) and the body earth.
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?
Go to Step 5.
Go to Step 3.

STEP 3. Check of open circuit in body earth lines between licence plate lamp connector (LH) or licence plate lamp connector (RH) and joint connector.

Q. Is the check result normal?
Go to Step 4.
Repair the connector(s) or wiring harness.

STEP 4. Check of open circuit in body power supply lines between licence plate lamp (LH) connector or licence plate lamp (RH) connector and body earth.

Q. Is the check result normal?
Go to Step 5.
Repair the connector(s) or wiring harness.

STEP 5. Retest the system.
Check that the licence plate lamp illuminates normally.

Q. Is the check result normal?
YES) : The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the socket of the defective licence plate lamp.