Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Driving Support ECU Receive Data Malfunction (C1A73)

DESCRIPTION

If a communication error between the driving support ECU assembly and another ECU is detected, DTC C1A73 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 adjustment.

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• The lane departure alert system (w/ steering control) 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:

The driving support ECU communicates with other ECUs via CAN communication. Confirm that the CAN communication system is functioning normally before proceeding.

(a) Check for DTCs.

B

GO TO PRE-COLLISION SYSTEM

A

(a) Clear the DTCs.

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

HINT:

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

(c) Check for DTCs.

A

USE SIMULATION METHOD TO CHECK

B

REPLACE FORWARD RECOGNITION CAMERA