B Series Truck 4WD L4-2606cc 2.6L SOHC (1992)
Air Conditioning Switch: Description and Operation
PURPOSE
Signals the ECU when A/C is running. ECU then ensures stable idling by compensating for extra engine load created by the A/C compressor.
LOCATION
Instrument panel.
OPERATION
When A/C switch "ON" signal is received by the ECU, it signals the idle speed control valve to increase amount of bypass air and raise idle speed.
