PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2057

DTC Code DTC Name
B2057 Yaw Rate Sensor

DESCRIPTION

This DTC is output when a malfunction in the yaw rate and acceleration sensor is detected. This circuit consists of the yaw rate and acceleration sensor and seat belt control ECU. Signals are sent from the yaw rate and acceleration sensor using CAN communication.

DTC No. DTC Detection Condition Trouble Area
B2057 Malfunction in yaw rate and acceleration sensor

  • CAN communication system

  • Yaw rate and acceleration sensor

  • Seat belt control ECU

WIRING DIAGRAM

A015ZO1E09

INSPECTION PROCEDURE

Note

When the seat belt control ECU is replaced with a new one, Initialization must be performed Click here.

PROCEDURE


  1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM)


    1. Clear the DTCs Click here.

    2. Turn the cruise control main switch on.

    3. Drive the vehicle at a speed of 45 km/h (27 mph) or more.

    4. Recheck for DTCs.

      OK
      CAN communication system DTC is not output.

    NG

    GO TO CAN COMMUNICATION SYSTEM Click here

    OK

  2. CHECK DTC OUTPUT (VEHICLE STABILITY CONTROL SYSTEM)


    1. Turn the engine switch off.

    2. Start the engine.

    3. 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).

    4. Check DTC for vehicle stability control system Click here.

      OK
      Vehicle stability control system DTC is not output.

    NG

    GO TO VEHICLE STABILITY CONTROL SYSTEM Click here

    OK

  3. CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)


    1. Clear Delete the DTC Click here.

    2. Recheck for DTCs.

      OK
      DTC B2057 is not output.

    NG

    REPLACE SEAT BELT CONTROL ECU Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here