Lexus IS250 · Service Manual RESTRAINTS

B2057

Diagnostic trouble codes

DESCRIPTION

This DTC is output when a malfunction in the yaw rate sensor is detected. This circuit consists of the yaw rate sensor and seat belt control ECU. Signals are sent from the yaw rate sensor using CAN communication.
DTC No.
 DTC Detection Condition
 Trouble Area
B2057
 Malfunction in yaw rate sensor
  1. Yaw rate sensor
  2. Seat belt control ECU

INSPECTION PROCEDURE

NOTICE:
When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed (Click here).


1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM)

  1. Delete the DTC (Click here).

  1. Recheck for DTC.

    OK:
    DTC U0123 is not output.



 NG
GO TO CAN COMMUNICATION SYSTEM
OK


2. CHECK DTC OUTPUT (BRAKE CONTROL SYSTEM)

  1. Delete the DTC (Click here).

  1. Recheck for DTC.

    OK:
    DTC C1234 is not output.



 NG
GO TO BRAKE CONTROL SYSTEM
OK


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

  1. Delete the DTC (Click here).

  1. Recheck for DTC.

    OK:
    DTC B2057 is not output.



 NG
REPLACE SEAT BELT CONTROL ECU
OK

USE SIMULATION METHOD TO CHECK


← B2056B2058 →