PRE-COLLISION: PRE-COLLISION SYSTEM (for HV Model): C1A46; Yaw Rate Sensor; 2019 - 2021 MY Avalon HV [04/2018

Last Modified: 08-21-2023	6.11:8.1.0	Doc ID: RM100000001BE5I
Model Year Start: 2019	Model: Avalon HV	Prod Date Range: [04/2018 - 08/2021]
Title: PRE-COLLISION: PRE-COLLISION SYSTEM (for HV Model): C1A46; Yaw Rate Sensor; 2019 - 2021 MY Avalon HV [04/2018 - 08/2021]

DTC

C1A46

Yaw Rate Sensor

DESCRIPTION

The driving support ECU assembly receives yaw rate sensor signals from the airbag ECU assembly and skid control ECU (brake booster with master cylinder assembly) via CAN communication. If the driving support ECU assembly receives a yaw rate sensor malfunction signal from the airbag ECU assembly or skid control ECU (brake booster with master cylinder assembly), DTC C1A46 will be stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1A46	Yaw Rate Sensor	While the vehicle is being driven at a speed of 5 km/h (4 mph) or more, the driving support ECU assembly receives a yaw rate sensor malfunction signal from airbag ECU assembly for approximately 10 seconds. While the vehicle is being driven at a speed of 5 km/h (4 mph) or more, the driving support ECU assembly receives a yaw rate sensor zero point malfunction signal from skid control ECU (brake booster with master cylinder assembly) for approximately 10 seconds.	Electronically controlled brake system

DTC Detection Conditions:

		Vehicle Condition
		Pattern 1	Pattern 2
Malfunction Status	Vehicle is being driven at a speed of 5 km/h (4 mph) or more	○	○
	Driving support ECU assembly receives a yaw rate sensor malfunction signal from airbag ECU assembly	○	-
	Driving support ECU assembly receives a yaw rate sensor zero point malfunction signal from skid control ECU (brake booster with master cylinder assembly)	-	○
Detection Time		Approximately 10 seconds or more	Approximately 10 seconds or more
Number of Trips		1 trip	1 trip

HINT:

DTC will be stored when the conditions of any pattern in the table above are met.

CAUTION / NOTICE / HINT

NOTICE:

The pre-collision system 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.	GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

HINT:

If DTC C1A46 is output by the pre-collision system, perform troubleshooting for the electronically controlled brake system.

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END