Dtc B2071 Stop Light Control Relay Malfunction

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Pre-Crash Safety. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC (CAN COMMUNICATION SYSTEM)

CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)

CHECK DTC (PRE-CRASH SAFETY SYSTEM)

DTC B2071 Stop Light Control Relay Malfunction


DESCRIPTION

This DTC is stored when a malfunction in the stop light operation relay circuit of the vehicle stability control system is detected. This circuit consists of the master cylinder solenoid (skid control ECU) and seat belt control ECU. Signals are sent from the master cylinder solenoid (skid control ECU) via the CAN communication line.

DTC Code
DTC Detection Condition
Trouble Area
B2071
Malfunction in the brake system is detected.
  1. CAN communication system
  2. Vehicle stability control system
  3. Seat belt control ECU

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Pre-Crash Safety.Pre-Crash Safety System. Dtc B2071 Stop Light Control Relay Malfunction


INSPECTION PROCEDURE

1.CHECK DTC (CAN COMMUNICATION SYSTEM)

  1. Use the intelligent tester to check if the CAN communication system is functioning normally (Click here for LHD, Click here for RHD).

    Result
    Result
    		Proceed to
    OK
    (DTC U0122 is not output)
    		A
    NG
    (for LHD)
    		B
    NG
    (for RHD)
    		C
    HINT:
    DTC U0122: Lost Communication with Skid Control ECU


B
GO TO CAN COMMUNICATION SYSTEM (Click here)

C
GO TO CAN COMMUNICATION SYSTEM (Click here)
A


2.CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)

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

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC C1380 is not output.
    HINT:
    DTC C1380: Stop Light Control Relay Malfunction


NG
GO TO VEHICLE STABILITY CONTROL SYSTEM (DTC C1380) (Click here)
OK


3.CHECK DTC (PRE-CRASH SAFETY SYSTEM)

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

  1. Clear the DTCs (Click here).

  1. 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)