DTC C1A4B: Stop Light Relay Circuit [12/2015 - 11/2017]: Procedure

1. Check DTCs for the vehicle stability control system (Refer to DTC CHECK / CLEAR [12/2015 - 11/2017] ).

   OK

   Vehicle stability control system DTC is not output.

Result: 

NG 

GO TO VEHICLE STABILITY CONTROL SYSTEM 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2015 - 11/2017] )

Result: 

OK 

See step  2

1. Replace the brake actuator (skid control ECU) (Refer to REMOVAL [12/2015 - 11/2017] ).

Result: 

NEXT 

See step  3

1. Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.
2. Clear the DTCs (Refer to DTC CHECK / CLEAR [12/2015 - 11/2017] ).
3. Check for DTCs (Refer to DTC CHECK / CLEAR [12/2015 - 11/2017] ).

   OK

   DTC U1A4B is not output.

Result: 

OK 

END 

Result: 

NG 

REPLACE DRIVING SUPPORT ECU 

(Refer to REMOVAL [12/2015 - 11/2017] )