B2057

PRE-COLLISION: PRE-COLLISION SYSTEM: B2057: Yaw Rate Sensor
B2057 - Yaw Rate Sensor

DESCRIPTION

This DTC is output when a malfunction in the yaw rate and acceleration sensor is detected. Signals are sent from the yaw rate and acceleration sensor using CAN communication.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When the seat belt control ECU is replaced with a new one, Initialization must be performed Pre-Collision System.
* When the distance control ECU is replaced with a new one, initialization must be performed Installation.

PROCEDURE

1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM)

(a) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision / Trouble Codes.

(b) Clear the DTCs Pre-Collision System.

(c) Recheck for DTCs.

OK:

CAN communication system DTC is not output.

NG -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
OK -- Continue to next step.

2. CHECK DTC OUTPUT (VEHICLE STABILITY CONTROL SYSTEM)

(a) Turn the engine switch off.

(b) Start the engine.

(c) Drive the vehicle at a speed of 30 km/h (18 mph) or more, turn the steering wheel, and decelerate the vehicle (depress the brake pedal).

(d) Check DTC for vehicle stability control system Reading and Clearing Diagnostic Trouble Codes.

OK:

Vehicle stability control system DTC is not output.

NG -- GO TO VEHICLE STABILITY CONTROL SYSTEM Vehicle Stability Control System
OK -- Continue to next step.

3. REPLACE DISTANCE CONTROL ECU

(a) Replace the distance control ECU Removal.

(b) Initialize the distance control ECU Installation.

NEXT -- Continue to next step.

4. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM)

(a) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision / Trouble Codes.

(b) Clear the DTCs Pre-Collision System.

(c) Drive the vehicle.

(d) Recheck for DTCs.

OK:

DTC B2057 is not output.

NG -- REPLACE SEAT BELT CONTROL ECU Removal

OK -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) How To Proceed With Troubleshooting