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Inspection Procedure 9: 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 may be defective
  • The LIN bus line may be defective
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-III), read the ETACS diagnostic trouble code
(1)
cautionTo 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 stored in the ETACS-ECU.
Is the DTC stored?
Refer to DTC chart .
Go to Step 2.
 
STEP 2. Column switch check
  • Check the continuity for wiper/washer switch. Refer to .
  • Check the continuity for column switch (switch body part). Refer to .
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the column switch.