LANE DEPARTURE ALERT SYSTEM Main Switch Circuit

DESCRIPTION

The lane departure warning camera receives a lane-keeping assist main switch signal from the lane-keeping assist main switch.

WIRING DIAGRAM

*a	Lane-keeping Assist Main Switch
*b	Lane Departure Warning Camera

PROCEDURE

1. INSPECT LANE-KEEPING ASSIST MAIN SWITCH

   
   

   1. Remove the lane-keeping assist main switch.

      Click here

   2. Inspect the lane-keeping assist main switch.

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE LANE-KEEPING ASSIST MAIN SWITCH Click here

   OK

2. CHECK HARNESS AND CONNECTOR (LANE-KEEPING ASSIST MAIN SWITCH - LANE DEPARTURE WARNING CAMERA AND BODY GROUND)

   
   

   1. Disconnect the S4 lane departure warning camera connector.

   2. Disconnect the F7 lane-keeping assist main switch connector.

   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition S4-4 (LKSW) - F7-6 (ECU) Always Below 1 Ω F7-3 (GND) - Body ground Always Below 1 Ω S4-4 (LKSW) or F7-6 (ECU) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR (LANE-KEEPING ASSIST MAIN SWITCH - LANE DEPARTURE WARNING CAMERA AND BODY GROUND)