If the ETACS-ECU receives the lighting switch fail signal, the ETACS-ECU
stores the diagnosis code No. B1763.
If the ETACS-ECU receives the wiper switch fail signal, the ETACS-ECU stores the
diagnosis code No. B1764.
PROBABLE CAUSES
Malfunction of the column switch
Malfunction of the ETACS-ECU
DIAGNOSIS PROCEDURE
STEP 1. Check whether the diagnosis code is reset.
Check again if the diagnosis code is set to the ETACS-ECU.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)On completion, check that the diagnosis code No. B1763 or No. B1764 is reset.
Q.
Is the diagnosis code reset?
The diagnosis code is not set. : A poor connection, open circuit or other intermittent malfunction is present in
the LIN bus lines between the column switch and the ETACS-ECU (Refer to GROUP 00, How to Use Troubleshooting/Inspection
Service Points -
How to Cope with Intermittent Malfunctions ).
Diagnosis code No. B1763 is set. : Go to Step 3.
Diagnosis code No. B1764 is set. : Go to Step 2.
STEP 2. Check whether the diagnosis code is reset.
Check again if the diagnosis code is set to the ETACS-ECU.
(1)Replace the windshield wiper and washer switch.
(2)Erase the diagnosis code.
(3)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(4)On completion, check that the diagnosis code No. B1764 is reset.
Q.
Is the diagnosis code reset?
The procedure is complete.
Go to Step 3.
STEP 3. Check whether the diagnosis code is reset.
Check again if the diagnosis code is set to the ETACS-ECU.
(1)Replace the lighting switch.
(2)Erase the diagnosis code.
(3)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(4)On completion, check that the diagnosis code is reset.
Q.
Is the diagnosis code reset?
The procedure is complete.
Return to Step 4.
STEP 4. Check whether the diagnosis code is reset.
Check if diagnosis code is reset to the ETACS-ECU.
)
).
: Go to Step 3.
The procedure is complete.
Go to Step 3.