Test 21: Back Door Unlock Detection Switch Circuit: Description

Door unlock detection switch is incorporated into door lock motor assembly. Door unlock detection switch is in ON position when door lock knob is in unlock position, and OFF when door lock knob is in lock position. Body Electronic Control Unit (ECU) determines door lock knob position by using input signal from door unlock detection switch. Body ECU uses input signal for key confinement prevention system, wireless door lock control system and theft deterrent system.