Inspection Procedure 10: All the Turn-signal Lamps do not Illuminate.


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

COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of column switch
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III diagnosis code



Q. Is the diagnosis code set?





STEP 2. M.U.T.-III data list




  • Turn the ignition switch to the ON position.
  • Turn the turn-signal lamp switch to the left position.
Item No.
 Item name
 Normal condition
Item 254
 IG voltage
 System voltage
Item 343
 Turn switch left
 ON

  • Turn the turn-signal lamp switch to the right position.
Item No.
 Item name
 Normal condition
Item 344
 Turn switch right
 ON
OK: Normal conditions are displayed for all the items.

Q. Is the check result normal?







STEP 3. Retest the system



Q. Is the check result normal?