DTC C1A03: Driving Support ECU Internal Logical Error; DTC C1A06: Stop Light Switch Input Circuit [08/2014 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Clear the DTCs (See article. Refer to DTC CHECK / CLEAR [08/2014 - ] ).
4. Perform the following to make sure that the DTC detection conditions are met.

   HINT: 

   If the detection conditions are not met, the malfunction cannot be detected.

   1. Drive the vehicle at a speed of 50 km/h (30 mph) and 170 km/h (105 mph).
   2. Turn the cruise control switch (ON-OFF button) on.
   3. Push the -/SET switch to activate the cruise control.
5. Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.
6. Read the DTCs.

   Result

   Result	Proceed to
   DTC is not output	A
   DTC C1A03 or C1A06 is output	B

Result:  A

A 

USE SIMULATION METHOD TO CHECK 

(See article. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2014 - ] )

Result:  B

B 

REPLACE DRIVING SUPPORT ECU ASSEMBLY 

(See article. Refer to REMOVAL [08/2014 - ] )