DTC C1A0A: Front Radar Sensor Region Code Mismatch [04/2018 - 08/2021]: Procedure

WARNING: This page is about a different car, the 2021 Toyota Avalon, 2020 Toyota Avalon, and 2019 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR DTCs

Clear the DTCs.
Body Electrical > Pre-Collision 2 > Clear DTCs
Make sure that the DTC detection conditions are met.
HINT:

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

Check for DTCs.

Body Electrical > Pre-Collision 2 > Trouble Codes

Result

Result	Proceed to
DTC C1A0A is not output	A
DTC C1A0A is output	B

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2018 - ]

Result:

See step 2

REPLACE DRIVING SUPPORT ECU ASSEMBLY

Replace the driving support ECU assembly.

Refer to REMOVAL [04/2018 - 08/2021]

Result

Proceed to
NEXT

Result:

See step 3

CHECK FOR DTCs

Clear the DTCs.
Body Electrical > Pre-Collision 2 > Clear DTCs
Make sure that the DTC detection conditions are met.
HINT:

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

Check for DTCs.

Body Electrical > Pre-Collision 2 > Trouble Codes

Result

Result	Proceed to
DTC C1A0A is not output	A
DTC C1A0A is output	B

Result:

END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE)

Result:

See step 4

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

Replace the millimeter wave radar sensor assembly.
Refer to REMOVAL [04/2018 - 08/2021]

Adjust the millimeter wave radar sensor assembly.

Refer to ADJUSTMENT [04/2018 - 08/2020] , or refer to ADJUSTMENT [08/2020 - 08/2021]

Result

Proceed to
NEXT

Result:

END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE)