Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Driving Support ECU (C1A01)

DESCRIPTION

If the forward recognition camera detects a malfunction in the internal circuit of the driving support ECU assembly, DTC C1A01 is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1A01	Driving Support ECU	2 seconds after the engine switch is turned on (IG), a malfunction in the driving support ECU assembly internal circuit is detected for 5 seconds or more.	Driving support ECU assembly

CAUTION / NOTICE / HINT

NOTICE:

When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.
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

1.	REPLACE DRIVING SUPPORT ECU ASSEMBLY

(a) Replace the driving support ECU assembly.

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END

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Headup Display System(for Hv Model): Lost Communication with EMV Missing Message (B132187)
DESCRIPTION The meter mirror sub-assembly receives signals from the radio and display receiver assembly via local bus communication and navigation system information on the headup display. This DTC is stored when the meter mirror sub-assembly cannot receive the signal. DTC No. Detection Item DTC Det ...

Toyota Avalon (XX50) 2019-2022 Owners Manual