Idle Speed Control

Idle speed is controlled by the ECU through the idle speed stepper motor. A latch relay is used to program the stepper motor for engine start-up. The relay is located on the right inner fender panel. See Figure . The ECU energizes the latch relay when engine is in cranking mode, and keeps the relay energized for 3-5 seconds after the engine is stopped. In this way, the stepper motor can provide the proper increased enrichment for the next engine start. Idle speed is nonadjustable.