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DTC B1763: Lighting switch
DTC B1764: Wiper switch
 
 
cautionWhenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
TECHNICAL DESCRIPTION (COMMENT)
  • If the ETACS-ECU receives the lighting switch fail signal, the ETACS-ECU sets DTC B1763.
  • If the ETACS-ECU receives the wiper/washer switch fail signal, the ETACS-ECU sets DTC B1764.
 
 
TROUBLESHOOTING HINTS
  • The column switch (with built-in column-ECU) may be defective
  • The ETACS-ECU may be defective
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-III), Check whether the diagnostic trouble code is set again.
(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 Scan Tool (M.U.T.-III) ."
(2) Turn the ignition switch to the "ON" position.
(3) Erase the DTC.
(4) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(5) Check if DTC B1763 or B1764 is set.
Is the DTC set?
Go to Step 2.
The trouble can be an intermittent malfunction (GROUP 00 - How to Cope with Intermittent Malfunction ).
 
STEP 2. Using scan tool (M.U.T.-III), Check whether the diagnostic trouble code is set again.
Check again if the DTC is set in the ETACS-ECU.
(1) Replace the windshield wiper and washer switch.
(2) Erase the DTC.
(3) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(4) Check if DTC is set.
Is the DTC set again?
Replace the ETACS-ECU.
The diagnosis is complete.