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 power 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 > Seat Heater System(for Hv Model): Front Left Seat Heat Sensor Circuit (B14C1)
DESCRIPTION Output to the front seat cushion heater temperature sensor stops if one of the following occurs: 1) the temperature sensor is open or shorted; or 2) the temperature sensor is damaged and its output value does not change. DTC No. Detection Item DTC Detection Condition Trouble Area B14C1 F ...

Toyota Avalon (XX50) 2019-2022 Owners Manual