Toyota Tundra Service Manual: Front Radar Sensor Region Code Mismatch (C1A0A)

DESCRIPTION

The forward recognition camera receives necessary information from the millimeter wave radar sensor assembly.

When the forward recognition camera judges that a millimeter wave radar sensor assembly which is not compatible with the vehicle has been installed, DTC C1A0A is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1A0A

Front Radar Sensor Region Code Mismatch

After the ignition switch is turned to ON for 3 seconds or more, the forward recognition camera detects that a millimeter wave radar sensor assembly which is not compatible with the vehicle is installed for 5 seconds or more.

  • Millimeter wave radar sensor assembly
  • Forward recognition camera

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
  • If the forward recognition camera has been replaced with a new one, be sure to perform forward recognition camera adjustment.

    Click here

  • When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle. As a result, a DTC may be stored.
  • If the millimeter wave radar sensor assembly has been replaced, be sure to perform millimeter wave radar sensor assembly adjustment.

    Click here

PROCEDURE

1.

CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM)

(a) Clear the DTCs.

Click here

(b) Make sure that the DTC detection conditions are met.

HINT:

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

(c) Check for DTCs.

Click here

Result

Proceed to

DTC C1A0A is not output

A

DTC C1A0A is output

B

A

USE SIMULATION METHOD TO CHECK

B

2.

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

(a) Replace the millimeter wave radar sensor assembly.

Click here

(b) Adjust the millimeter wave radar sensor assembly.

Click here

NEXT

3.

CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM)

(a) Clear the DTCs.

Click here

(b) Make sure that the DTC detection conditions are met.

HINT:

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

(c) Check for DTCs.

Click here

Result

Proceed to

DTC C1A0A is not output

A

DTC C1A0A is output

B

A

END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE)

B

REPLACE FORWARD RECOGNITION CAMERA

    Forward Recognition Camera System

    Steering Angle Sensor (C1A47)

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