Dtc B2064 Vehicle Type Signal Malfunction

Restraints. Lexus Is250, Is220D. Gse20 Ale20
Pre-Crash Safety. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

INSPECTION PROCEDURE

INITIALIZE SEAT BELT CONTROL ECU

CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)

REPLACE GATEWAY ECU

CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)

DTC B2064 Vehicle Type Signal Malfunction


DESCRIPTION

The seat belt control ECU is connected to the gateway ECU using CAN communication.
The seat belt control ECU receives vehicle model information from the gateway ECU and determines whether the seat belt buckle switch information from the center airbag sensor assembly is for the driver seat or the passenger seat.
DTC B2064 is output when the CAN communication frame with the gateway ECU is normal and communication is available, but the steering wheel position information is not set or varies.

DTC No.
DTC Detecting Condition
Trouble Area
B2064
  1. Communication with the network gateway ECU is normal and received steering wheel position information is not set (three times in succession)
  1. Gateway ECU
  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.INITIALIZE SEAT BELT CONTROL ECU

  1. Initialize the seat belt control ECU (Click here).


NEXT


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

  1. Delete the DTC (Click here).

  1. Recheck for DTC.

    OK:
    DTC B2064 is not output.


OK
USE SIMULATION METHOD TO CHECK
NG


3.REPLACE GATEWAY ECU

NEXT


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

  1. Delete the DTC (Click here).

  1. Recheck for DTC.

    OK:
    DTC B2064 is not output.


NG
REPLACE SEAT BELT CONTROL ECU
OK

END