Throttle Opener Control

During air conditioner operation, engine speed is increased by changing the throttle valve opening. In order to decrease HC emissions during deceleration, ECU de-energizes solenoid valve which supplies manifold vacuum to throttle opener at or above the preset engine speed.

Fig 1: Feedback Carburetor System Circuit Diagram (Mitsubishi Pickup, Montero and Ram-50) Some models may have slight variation.