Inspection Procedure 7: The Headlamp Automatic Shutdown Function does not Work Normally.


caution Whenever the ECU is replaced, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.

OPERATION



COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of driver’s door switch
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE


STEP 1. Customise function check



Q. Is the check result normal?





STEP 2. M.U.T.-III diagnosis code



Q. Is the diagnosis code set?





STEP 3. M.U.T.-III data list




  • Turn the ignition switch to the LOCK (OFF) position.
  • Turn the lighting switch to the "TAIL" position.
Item No.
 Item name
 Normal condition
Item 254
 IG voltage
 0 V
Item 340
 Head lamp switch (tail)
 ON

  • Turn the lighting switch to the "HEAD" position.
Item No.
 Item name
 Normal condition
Item 341
 Head lamp switch
 ON

  • Open the driver’s door.
Item No.
 Item name
 Normal condition
Item 256
 Dr door ajar switch
 Open
OK: Normal conditions are displayed for all the items.

Q. Is the check result normal?









STEP 4. Retest the system



Q. Is the check result normal?