Inspection Procedure 12: One of the position lamps, the licence plate lamps or the tail lamps does not illuminate.


COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of bulbs
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE


STEP 1. Bulb check



Q. Is the check result normal?





STEP 2. Resistance measurement at the headlamp assembly (position: LH) or (position: RH) connector, rear combination lamp (tail: LH) or (tail: RH) connector, licence plate lamp (LH) or (RH) connector (earth terminal).


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between the connector terminal of lamp which does not illuminate and the body earth.

  • Measure the resistance between the headlamp assembly (position: LH) or (position: RH) connector (earth terminals) and body earth.
  • Measure the resistance between the rear combination lamp (tail: LH) or (tail: RH) connector (earth terminals) and body earth.
  • Measure the resistance between the licence plate lamp (LH) or (RH) connector (earth terminals) and body earth.
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?





STEP 3. Check of open circuit in earth lines between the headlamp assembly (position: LH) or (position: RH) connector, rear combination lamp (tail: LH) or (tail: RH) connector, licence plate lamp (LH) or (RH) connector and body earth.


Q. Is the check result normal?





STEP 4. Check of open circuit in (TAL1, TAR1, TAL2, TAR2) lines between the headlamp assembly (position: LH) or (position: RH) connector, rear combination lamp (tail: LH) or (tail: RH) connector, licence plate lamp (LH) or (RH) connector and ETACS-ECU connector.


Q. Is the check result normal?





STEP 5. Retest the system



Q. Is the check result normal?