Toyota Tundra Service Manual: Vehicle Speed Tolerance Malfunction (C1AA2)

DESCRIPTION

The forward recognition camera receives vehicle speed tolerance signals from the combination meter assembly. If the combination meter assembly detects a vehicle speed tolerance malfunction signal, it informs the forward recognition camera via CAN communication, and DTC C1AA2 is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AA2

Vehicle Speed Tolerance Malfunction

3 seconds after the ignition switch is turned to ON, a signal from the combination meter assembly indicating an abnormal vehicle speed tolerance is detected by the forward recognition camera for 50 seconds or more.

  • Meter/gauge system
  • Combination meter 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 Axis Adjustment.

    Click here

  • The forward recognition camera system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.

    Click here

  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

PROCEDURE

1.

INSPECT COMBINATION METER ASSEMBLY (OPERATION CHECK)

(a) Perform Operation Check of the meter/gauge system.

Click here

HINT:

Check the meter function by referring to Operation Check for the combination meter assembly.

Result

Proceed to

Combination meter assembly is normal

A

Combination meter assembly is malfunctioning

B

B

CHECK METER / GAUGE SYSTEM (SPEEDOMETER MALFUNCTION)

A

2.

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 C1AA2 is not output

A

DTC C1AA2 is output

B

A

USE SIMULATION METHOD TO CHECK

B

3.

REPLACE FORWARD RECOGNITION CAMERA

(a) Replace the forward recognition camera.

Click here

(b) Perform forward recognition camera axis adjustment.

Click here

NEXT

4.

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 C1AA2 is not output

A

DTC C1AA2 is output

B

A

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)

B

REPLACE COMBINATION METER ASSEMBLY

    FCM Destination Information Unmatched (C1AA1)

    Vehicle Speed Sensor Circuit (C1AA3)

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