Lexus NX: 2ar-fxe (engine Mechanical)

 GSW Terminal Circuit Malfunction (B1243)

DESCRIPTION If the collision door lock release function does not operate normally, or an open or short in the GSW input circuit of the main body ECU (multiplex network body ECU) is detected, DTC B1243 will be stored. DTC No. Detection Item DTC Detection Condition Trouble Area B1243 GS

 System Description

SYSTEM DESCRIPTION AUTOMATIC LIGHT CONTROL SYSTEM (a) When the headlight dimmer switch is in the AUTO position, the automatic light control system detects ambient light levels and controls the headlights, taillights, front fog lights, clearance lights and license plate lights. LIGHT AUTO TURN-OFF SY