PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2085

DTC Code DTC Name
B2085 Communication Error from Driving Support ECU to VSC ECU

DESCRIPTION

This DTC is stored when CAN communication between the driving support ECU and skid control ECU is interrupted.

This circuit consists of the driving support ECU, skid control ECU and seat belt control ECU. DTC B2085 is stored when the seat belt control ECU detects an interruption in CAN communication between the driving support ECU and skid control ECU.

DTC Code DTC Detection Condition Trouble Area
B2085 When the engine switch is on (IG), the brake actuator assembly (skid control ECU) detects an interruption in communication with the driving support ECU for 1 second or more.

  • CAN communication system

  • Brake actuator assembly

  • Seat belt control ECU

  • Driving support ECU

INSPECTION PROCEDURE

Tech Tips

This circuit uses CAN communication. Therefore, be sure to check that the CAN communication system is normal before performing inspection.

PROCEDURE


  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)


    1. for LHD:


      1. Select "Bus Check" from the "System Select" Click here.

    2. for RHD:


      1. Select "Bus Check" from the "System Select" Click here.

    3. Select "Communication Malfunction DTC" from the "Bus Check" screen, and then select "Enter".

      OK
      CAN communication system DTC is not output.
      Result
      Result Proceed to
      CAN communication system DTC is not output A
      CAN communication system DTC is output (for LHD) B
      CAN communication system DTC is output (for RHD) C

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

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


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC B2085 is not output.

    NG

    REPLACE SEAT BELT CONTROL ECU Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here