Inspection Procedure 8: None of the turn-signal lamps illuminate.


caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.


COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of the 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 "LOCK" (OFF) position.
Item No.
 Item name
 Normal condition
30
 Ignition switch(IG1)
 OFF

  • Turn the turn-signal lamp switch (LH) to the ON position.
Item No.
 Item name
 Normal condition
62
 Turn-signal lamp (LH) output
 ON
63
 Turn-signal lamp (RH) output
 OFF

  • Turn the turn-signal lamp switch (RH) to the ON position.
Item No.
 Item name
 Normal condition
62
 Turn-signal lamp (LH) output
 OFF
63
 Turn-signal lamp (RH) output
 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?