Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: CAN Communication Failure (Message Registry) (U1000)

DESCRIPTION

When the clearance warning ECU assembly determines that the CAN communication circuit is malfunctioning during self diagnosis, DTC U1000 is stored.

PROCEDURE

(a) Using the Techstream, check for DTCs according to the prompts on the screen.

HINT:

After turning the engine switch from off to on (IG), wait 10 seconds or more before checking for DTCs.

(b) Clear the DTCs according to the screen on the Techstream.

(c) Recheck for DTCs.

OK:

DTC U1000 is not output.

HINT:

• If DTC U1000 is not output after clearing the DTCs, an intermittent CAN communication circuit malfunction is suspected.
• If DTC U1000 is output frequently, replace the clearance warning ECU assembly, even though the DTC was not output when rechecking for DTCs.

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OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE CLEARANCE WARNING ECU ASSEMBLY