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I have determined the following items are used by the ECU for determining idle:
- Engine Coolant Temperature (ECT) Sensor - coolant temperature
- Throttle Position Sensor (TPS) - Throttle valve position
- Power Steering Oil Pressure Switch - PS load
- Camshaft Position Sensor - Engine Speed
- Vehicle Speed Sensor - vehicle speed
- Air Conditioner Switch - AC operation
- Ignition Switch - Start signal
Then, the ECU sends signals to the following that impacts idle:
- IACV-AAC valve - to open the AAC valve by a calculated percent
- IACV-Air Regulator - to increase idle with cold engine for a few minutes
- IACV-FICD - to increase AAC air flow when AC system is on
Im planning to test each of these component on Saturday. As well as the MAS Air Flow Sensor, O2 sensor and the EGR temp sensor (if I can find it). Am I missing anything??
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1993 NX2000 -- JDM DE, ActiveTuning Grnd Kit & RSTB, Cusco FSTB, Progress Rear Swaybar, Hyperco/AGX,
Full SS 2.5" VRS SS Catback, SSAC 2.5" header/downpipe, JWT Pop-Charger, EDM Headlamp, Yellow Fogs, & Power Leather Seats.
Last edited by DC Scotty : 01-18-2008 at 08:14 PM.
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