PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2071

DTC Code DTC Name
B2071 Stop Light Control Relay Malfunction

DESCRIPTION

This DTC is stored when the master cylinder solenoid (skid control ECU) detects that the brake light relay is malfunctioning and transmits this to the seat belt control ECU via CAN communication.

DTC Code DTC Detection Condition Trouble Area
B2071 The brake light relay malfunctions.

  • CAN communication system

  • Vehicle stability control system

  • Seat belt control ECU

WIRING DIAGRAM

A01ENAVE01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)


    1. Using the intelligent tester, enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Code.

    2. Check for DTCs Click here.

      OK
      DTC C1425 is not output.

    NG

    GO TO VEHICLE STABILITY CONTROL SYSTEM Click here

    OK

  2. CHECK DTC (PRE-CRASH SAFETY SYSTEM)


    1. Using the intelligent tester, enter the following menus: Body / Pre-Crash / Trouble Code.

    2. Clear the DTCs Click here.

    3. Check for DTCs Click here.

      Result
      Result Proceed to

      OK

      (DTC B2071 is not output)

      		 A

      NG

      (for LHD)

      		 B

      NG

      (for RHD)

      		 C

    B

    REPLACE SEAT BELT CONTROL ECU Click here

    C

    REPLACE SEAT BELT CONTROL ECU Click here

    A

    USE SIMULATION METHOD TO CHECK Click here