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Inspection Procedure 12: ETACS-ECU does not receive any signal from the column switch signal.
 
 
 
 
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 may be defective
  • The LIN bus line may be defective
 
 
DIAGNOSIS
Using scan tool MB991958, read the ETACS diagnostic trouble code.
Check the DTC is stored in the ETACS-ECU.
(1)
cautionTo prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
Connect scan tool MB991958. Refer to "How to connect the Scan Tool (M.U.T.-III) ."
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is stored.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the DTC stored?
Troubleshoot the ETACS-ECU (Refer to ).
Replace the column switch assembly.