LANE-KEEPING ASSIST SYSTEM Main Switch Circuit

DESCRIPTION

• The driving support ECU receives lane-keeping assist main switch ON/OFF signal from the steering pad switch with modulator.

• The lane-keeping assist main switch circuit uses CAN communication. If there is a malfunction in this circuit, check for DTCs in the CAN communication system before troubleshooting this circuit.

PROCEDURE

1. READ VALUE USING INTELLIGENT TESTER (LANE-KEEPING ASSIST MAIN SWITCH)

   
   

   1. Check the Data List for proper functioning of the lane-keeping assist main switch signal.

      Steering Pad Switch

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Lane Keep Assist SW	Lane-keeping assist main switch signal / ON or OFF	ON: Lane-keeping assist main switch is ON OFF: Lane-keeping assist main switch is OFF	-

      OK
      Display changes according to lane-keeping assist main switch described in above table.

   
   

   NG

   PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   OK

2. READ VALUE USING INTELLIGENT TESTER (LANE-KEEPING ASSIST MAIN SWITCH)

   
   

   1. Check the Data List for proper functioning of the lane-keeping assist main switch signal.

      Lane Keep

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      LKA Main SW	Lane-keeping assist main switch signal / ON or OFF	ON: Lane-keeping assist main switch is ON OFF: Lane-keeping assist main switch is OFF	-

      OK
      Display changes according to lane-keeping assist main switch described in above table.

   
   

   OK

   REPLACE DRIVING SUPPORT ECU Click here

   NG

   REPLACE STEERING PAD SWITCH ASSEMBLY Click here