DTC C1A02: Vehicle Information Not Obtained [09/2014 - 11/2017]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Pre-Collision 2 / Data List.
5. Read the Data List according to the display on the Techstream.

   Body Electrical > Pre-Collision 2 > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Country# (DSS)	Destination country for driving support ECU assembly	JPN, NA, EURO, CA, AUS, SAFC, OTHER, TWN, CHINA, THAI, GCC or NOFIX	Actual country code	-

   Body Electrical > Pre-Collision 2 > Data List 

   Tester Display
   Country# (DSS)

   NOTE:

   When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

   HINT: 

   The country specification information stored in the driving support ECU assembly is determined by the country specification information stored in the main body ECU (multiplex network body ECU). If the country specification information for the millimeter wave radar sensor assembly matches the vehicle, the country specification information for the main body ECU (multiplex network body ECU) and driving support ECU assembly is incorrect and the main body ECU (multiplex network body ECU) and driving support ECU assembly need to be replaced.

   Result

   Result	Proceed to
   Country specification information for vehicle and driving support ECU assembly match	A
   Country specification information for vehicle and driving support ECU assembly do not match	B

Result: 

B 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND DRIVING SUPPORT ECU ASSEMBLY 

Result: 

A 

See step  2

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [09/2014 - 11/2017]

   Body Electrical > Pre-Collision 2 > Clear DTCs 

2. Make sure that the DTC detection conditions are met.

   HINT: 

   If the detection conditions are not met, the system cannot detect the malfunction.

3. Check for DTCs.

   Refer to DTC CHECK / CLEAR [09/2014 - 11/2017]

   Body Electrical > Pre-Collision 2 > Trouble Codes 

   NOTE:

   When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

   Result

   Result	Proceed to
   DTC C1A02 is not output	A
   DTC C1A02 is output	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 08/2016]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 11/2017] 

Result: 

B 

REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to  REMOVAL [09/2014 - 01/2023]