Toyota Avalon Service & Repair Manual: Yaw Rate Sensor (C1A46)

DESCRIPTION

The driving support ECU assembly receives yaw rate sensor signals from the airbag ECU assembly and skid control ECU (brake actuator 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 actuator 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 actuator 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 actuator 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

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