Inspection Procedure

1. Check for DTC (see DTC CHECK / CLEAR  ).
2. Clear the DTC (see DTC CHECK / CLEAR  ).
3. Recheck for DTC (see DTC CHECK / CLEAR  ).

   OK: DTC C1A01 is not output. 

NG: REPLACE DRIVING SUPPORT ECU (See  REMOVAL   ) 

OK: USE SIMULATION METHOD TO CHECK  (See HOW TO PROCEED WITH TROUBLESHOOTING )