Circuit Description
WARNING: This page is about a different car, the 2000 Isuzu Hombre. However, it is still accessible from the selected car via links, so may be relevant.
Idle Air Control (IAC) valve is controlled by Powertrain Control Module (PCM). PCM uses IAC to maintain a desired idle speed, which can vary depending on input to PCM. Scan tool reads IAC valve pintle position in counts. The higher the counts, the more air that is allowed to by-pass throttle plate.
Conditions for setting this DTC are:
- DTCs P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0131, P0132, P0133, P0134, P0171, P0172, P0200, P0300, P0301, P0302, P0303, P0304, P0325, P0335, P0341, P0342, P0404, P0405, P0440, P0442, P0446, P0452, P0453, P0502, P0506, P0601, P0602, P0705, P0706, P1133, P1404 and P1441 not set.
- IAC valve counts are less than 2 counts.
- BARO is greater than 72 kPa.
- ECT greater than 104°F (40°C).
- Idle speed deviates less than desired RPM by greater than 60 RPM for more than 5 seconds.
- Battery voltage is 10-17 volts.