DTC C1A03: Driving Support ECU Internal Logical Error; DTC C1A06: Stop Light Switch Input Circuit [09/2015 - ]: Procedure

1. Clear the DTC (Refer to DTC CHECK / CLEAR [09/2015 - ] ).
2. Check for DTC (Refer to DTC CHECK / CLEAR [09/2015 - ] ).

   OK

   DTC C1A03 or C1A06 is not output.

Result:  OK

OK 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] )

Result:  NG

NG 

REPLACE DRIVING SUPPORT ECU 

(Refer to REMOVAL [09/2015 - ] )