Main Switch Circuit [10/2015 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: System Select / Can Bus Check.

   CAN Bus Check 

   Result

   Result	Proceed to
   All of the ECUs and sensors that are currently connected to the CAN communication system are displayed.	A
   None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed.	B

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM:  HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] 

Result: 

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: System Select / Health Check.
5. Check DTCs.

   Result

   Result	Proceed to
   No DTCs are output.	A
   DTCs are output.	B

Result: 

B 

GO TO DTC CHART 

Result: 

A 

See step  3

1. Remove the lane departure alert main switch.

   Refer to REMOVAL [10/2015 - ]

2. Inspect the lane departure alert main switch.

   Refer to INSPECTION [10/2015 - ]

Result: 

NG 

REPLACE LANE-KEEPING ASSIST MAIN SWITCH:  REMOVAL [10/2015 - ] 

Result: 

OK 

See step  4

1. Disconnect the G157 lane departure alert main switch connector.
2. Disconnect the G159 driving support ECU assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G157-6 (ECU) - G159-5 (PBSW)	Always	Below 1 Ω
   G157-6 (ECU) or G159-5 (PBSW) - Body ground	Always	10 kΩ or higher
   G157-3 (GND) - Body ground	Always	Below 1 Ω

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE:  PROBLEM SYMPTOMS TABLE [10/2015 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR