B2071

PRE-COLLISION: PRE-COLLISION SYSTEM: B2071: Stop Light Control Relay Malfunction

DTC 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.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)
(a) Using the Techstream, enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Code.
(b) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC C1249 is not output.
NG -- GO TO VEHICLE STABILITY CONTROL SYSTEM
OK -- Continue to next step.
2. CHECK DTC (PRE-COLLISION SYSTEM)
(a) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision / Trouble Code.
(b) Clear the DTCs Pre-Collision System.
(c) Check for DTCs Pre-Collision System.
OK:
DTC B2071 is not output.
NG -- REPLACE SEAT BELT CONTROL ECU
OK -- USE SIMULATION METHOD TO CHECK