Circuit Description
WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
Idle Air Control (IAC) valve is controlled by PCM. PCM uses IAC to maintain a desired idle speed, which can vary depending on input to PCM and other criteria. If PCM detects that idle speed is out of IAC systems range of control at idle, it will perform an active test while vehicle is being driven.
DTC will set when the following conditions are present:
- DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0125, P0171, P0172, P0174, P0175, P0300, P0401, P0404, P0405, P0441, P0443, P0500, P0501, P0502, P0503, P1120, P1220, P1221 or P1441 not set.
- Engine running greater than 60 seconds.
- ECT greater than 140°F (60°C).
- IAT greater than 14°F (-10°C).
- BARO greater than 65 kPa.
- Ignition voltage between 9-18 volts.
- Vehicle speed not greater than one MPH.
- APP indicated angle zero percent.
- Actual idle speed is 200 RPM greater than desired idle speed.
- Conditions present for 5 seconds.