Toyota Tundra Service Manual: Vehicle Speed Sensor Circuit (C1AA3)

DESCRIPTION

The forward recognition camera receives vehicle speed signals from the skid control ECU (brake actuator assembly). If the skid control ECU (brake actuator assembly) receives a vehicle speed sensor malfunction signal, it informs the forward recognition camera via CAN communication, and DTC C1AA3 is stored.

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.

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• 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.

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PROCEDURE

HINT:

If DTC C1AA3 is stored, the vehicle stability control system may be malfunctioning. Check for DTCs related to the vehicle stability control system first.

(a) Check for DTCs.

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B

GO TO VEHICLE STABILITY CONTROL SYSTEM

A

(a) Clear the DTCs.

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(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.

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A

USE SIMULATION METHOD TO CHECK

B

(a) Replace the forward recognition camera.

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(b) Perform forward recognition camera axis adjustment.

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NEXT

(a) Clear the DTCs.

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(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.

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A

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)

B

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)