SL L4-1.9L SOHC VIN 9 (1991)
CIRCUIT OPERATION
The PCM controls engine idle speed by controlling current to two stepper coils contained within the idle air control valve assembly.
By controlling current to both of the coils, the PCM can control engine idle speed by allowing air to bypass around the throttle plate.
LOCATION
The IAC valve is located on the Throttle Body.