Inspection Procedure 11: The column switch signal is not received.
TECHNICAL DESCRIPTION (COMMENT)
The ETACS-ECU receives the column switch signal via the LIN communication. If there is an abnormality to column switch or LIN bus line, the lights and wiper/washer do not work normally.
TROUBLESHOOTING HINTS
The column switch assembly (integrated with steering wheel sensor) may be defective
The LIN bus line may be defective
DIAGNOSIS
Using scan tool (M.U.T.-III), read the ETACS diagnostic trouble code.
(1)
caution
To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
Connect scan tool (M.U.T.-III). Refer to "How to connect the Scan Tool (M.U.T.-III) ."
(2) Check if DTC is set in the ETACS-ECU.
Is the DTC set?
Refer to DTC chart .
Replace the column switch assembly (Integrated with steering wheel sensor).