Montero LS 4WD V6-2972cc 3.0L SOHC 12 Valve (1994)
A/C Signal: Description and Operation
PURPOSE
The air conditioning switch applies battery positive voltage to the engine control module when the air conditioning is switched ON.
When the air conditioning signals are input, the engine control module activates the idle air control motor, and also switches ON the power
transistor. As a result, current flows to the compressor clutch relay coil and the relay switch is switched ON; the air conditioning compressor's
magnetic clutch is activated.
