DTC C1A03: Driving Support ECU Internal Logical Error; DTC C1A06: Stop Light Switch Input Circuit: Procedure

1. Check for DTCs. Refer to DTC CHECK / CLEAR [03/2012 - ] .
2. Clear the DTCs. Refer to DTC CHECK / CLEAR [03/2012 - ] .
3. Recheck for DTCs. Refer to DTC CHECK / CLEAR [03/2012 - ] .

   OK

   DTC C1A03 or C1A06 is not output.

   NOTE:

   When replacing the driving support ECU, always replace it with a new one and be sure to perform initialization. Refer to INITIALIZATION [03/2012 - ] . If an ECU which was installed to another vehicle is used, the information stored in the ECU will not match the information from the vehicle, and as a result, a DTC may be stored.

NG → See step   2 

OK → See step   3