DESCRIPTION When the absorber control ECU has not acquired the vehicle identification information, DTC C1789 is stored. When the vehicle identification information is correctly acquired, this DTC is cleared. Vehicle identification information is automatically acquired when the system enters test mode. If an incorrect ECM is installed, the vehicle information will not match and DTC C1789 will be stored.
CAUTION / NOTICE / HINT NOTICE:
PROCEDURE
(a) Check for DTCs. Click here HINT: If DTC C1781 (Suspension Control ECU Malfunction) is output at the same time, perform troubleshooting for C1781 first.
(a) Check that vehicle identification information has been stored. Click here
(a) If the DTC was output as a result of the replacement of a related part, replace the part with one that has a correct part number.
NOTICE: When removing a related part to check it, be sure to follow the appropriate procedures and precautions. Refer to the following procedures to remove the ECM. Click here
HINT: If parts have not been replaced and DTC C1789 is output, there may be an internal malfunction in the absorber control ECU. Therefore, replace the absorber control ECU.
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Parking Assist Monitor System(for Gasoline Model): CAN Communication Failure (Message Registry) (U1000)
DESCRIPTION This DTC is stored when the television camera assembly judges that it has an internal CAN malfunction. DTC No. Detection Item DTC Detection Condition Trouble Area U1000 CAN Communication Failure (Message Registry) Can communication failure (message registry) Television camera assembly PR ...
