Code No.B1763 Lighting switch malfunction
Code No.B1764 Wiper/washer switch malfunction


TROUBLE JUDGEMENT



COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of lighting switch (with built-in column-ECU)
  • Malfunction of wiper/washer switch
  • Malfunction of the ETACS-ECU

DIAGNOSIS PROCEDURE


STEP 1. Check whether the diagnosis code is reset.



(1)Erase the diagnosis code.
(2)Turn the electric motor switch from "LOCK" (OFF) position to "ON" position.
(3)Check if the diagnosis code No. B1763 or B1764 is set.

Q. Is the diagnosis code set?







STEP 2. Check whether the diagnosis code is reset.



(1)Replace the lighting switch (with built-in column-ECU).
(2)Erase the diagnosis code.
(3)Turn the electric motor switch from "LOCK" (OFF) position to "ON" position.
(4)Check if diagnosis code is set.

Q. Is the diagnosis code set?





STEP 3. Check whether the diagnosis code is reset.



(1)Replace the wiper/washer switch.
(2)Erase the diagnosis code.
(3)Turn the electric motor switch from "LOCK" (OFF) position to "ON" position.
(4)Check if diagnosis code is set.

Q. Is the diagnosis code set?





STEP 4. Check whether the diagnosis code is reset.



(1)Erase the diagnosis code.
(2)Turn the electric motor switch from "LOCK" (OFF) position to "ON" position.
(3)Check if diagnosis code is set.

Q. Is the diagnosis code set?