DTC C1A0A: Front Radar Sensor Region Code Mismatch [11/2017 - 01/2023]: Procedure

1. Clear the DTCs.

   Powertrain > Radar Cruise > Clear DTCs 

2. Perform the following to make sure that the DTC detection conditions are met.

   HINT: 

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

   1. Turn the engine switch on (IG).
   2. Turn the dynamic radar cruise control system on using the cruise control main switch (ON/OFF button).
   3. Wait for 2 seconds or more.
3. Check for DTCs.

   Powertrain > Radar Cruise > Trouble Codes 

   Result

   Result	Proceed to
   DTC C1A10 is not output	A
   DTC C1A10 is output	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2017 - 03/2019]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [03/2019 - 09/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2020 - 01/2023] 

Result: 

B 

See step  2

1. Replace the driving support ECU assembly.

   Refer to REMOVAL [09/2014 - 01/2023]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

1. Clear the DTCs.

   Powertrain > Radar Cruise > Clear DTCs 

2. Perform the following to make sure that the DTC detection conditions are met.

   HINT: 

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

   1. Turn the engine switch on (IG).
   2. Turn the dynamic radar cruise control system on using the cruise control main switch (ON/OFF button).
   3. Wait for 2 seconds or more.
3. Check for DTCs.

   Powertrain > Radar Cruise > Trouble Codes 

   Result

   Result	Proceed to
   DTC C1A10 is not output	A
   DTC C1A10 is output	B

Result: 

A 

END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE) 

Result: 

B 

See step  4

1. Replace the millimeter wave radar sensor assembly with a new one.

   Refer to REMOVAL [11/2017 - 01/2023]

2. Perform millimeter wave radar sensor assembly adjustment.

   Refer to ADJUSTMENT [11/2017 - 03/2019] , or refer to ADJUSTMENT [03/2019 - 01/2023]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE)