Idle Air Control Tools needed: Torx bit # T-20 Paper Clip Small Punch Take the paper clip and open it up and form it into a big "U" shape. More throttle valve opening equals lower IAC counts. The Idle Learn Procedure When you're having problems, the first thing worth trying is the idle lean procedure. General Motors Corp. - Computer Relearn Procedures All Models; Cars ... Procedure must be performed if any of the following have been done or exist: ... reprogrammed or reset. When your vehicle has properly warmed up then you want to turn your … Over 20 years of bumper to bumper GM experience. Wait 30 seconds. IAC Reset Procedure with a Scan Tool: Ken Mosher. The idle rpm is programmed into the PROM. Inspect the valve and the mounting location for carbon build-up, rust or … The fuse box is located on the passenger side next to the battery. GM throttle body relearn procedure How to do a GM throttle body relearn procedure. And for more GM vehicles projects,check here:GM vehicle repair cases. That should do it. If not, the adjustments may be tailored by adjusting the minimum air rate screw. … 04-20-10 09:10 AM - Post# 1901788 I replaced the IAC to resolve a low idle problem I am having with my 1992 C1500 with a 350 TBI. That's a good … The ECM then resets the pintle to the correct position. If you’ve replaced your GM electronic throttle body or you’ve disconnected the battery, you must do a GM throttle body relearn to establish a new baseline idle. This should clear the ECM of all trouble codes. Whenever the ECM loses battery power (which clears the stored IAC position) or significant changes to the system (e.g. Use the procedure detailed in the vehicle service manual to remove the IAC valve. Resetting your cars ECU can also be useful when modifications are done on the vehicle. You are now … Step 2: Disconnect IAC valve. Ignition ON, engine OFF, perform the Idle Learn or Idle Learn Reset in Configuration/Reset or Module Setup. Turn on the ignition, but don't start the engine. ... ASE Master Technician, L1, Master GM Technician. With the new IAC installed the truck is idling erratically. To decrease rpm it moves the IAC valve in to reduce air … sensors are replaced) it is a good idea to perform the idle learn procedure. Insert the clip ends into the ALDL in the 'A' and 'B' pins. If you set a Check Engine light by having the IAC disconnected, ensure the engine is off, disconnect the negative battery terminal and wait 5 minutes. Procedure: The ECM controls idle rpm with the IAC (idle air control) valve. Locate the IAC valve electrical connector and unplug the IAC valve. Start engine. Each car has a unique IAC value that takes into account the condition of the sensors, air and vacuum … Reconnect the battery and drive the car for 20 minutes to allow the ECM to “relearn.” -Allan Reinike/Tom Keliher The IAC valve pintle is reset by turning the ignition ON for ten seconds and then OFF. Now, go remove the connector from the IAC. NOTE: Scan tool may reset engine oil life interval index in … The ECM uses non-volatile memory to keep track of the IAC position when the engine and ECM are turned off. Engine idling, verify the scan tool Throttle Body Idle Airflow Compensation value is equal 0% and the engine is … Step 3: Remove the IAC valve from the vehicle. Engine oil life interval may be programmed or reset by using a scan tool or the DIC. To increase idle rpm the ECM moves the IAC valve out allowing more air to pass by the throttle plate. In this instance, you want to reset your engine control modules manually through the fuse box. 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