NOTE: Scan tool may reset engine oil life interval index in … In this instance, you want to reset your engine control modules manually through the fuse box. The ECM then resets the pintle to the correct position. GM throttle body relearn procedure How to do a GM throttle body relearn procedure. 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. Inspect the valve and the mounting location for carbon build-up, rust or … When your vehicle has properly warmed up then you want to turn your … 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. More throttle valve opening equals lower IAC counts. Step 4: Inspect the IAC valve. … Now, go remove the connector from the IAC. ... ASE Master Technician, L1, Master GM Technician. To decrease rpm it moves the IAC valve in to reduce air … That should do it. The idle rpm is programmed into the PROM. Whenever the ECM loses battery power (which clears the stored IAC position) or significant changes to the system (e.g. Many car makers including GM started installing fly by wire … Insert the clip ends into the ALDL in the 'A' and 'B' pins. With the new IAC installed the truck is idling erratically. Resetting your cars ECU can also be useful when modifications are done on the vehicle. Turn on the ignition, but don't start the engine. With engine stabilized and in closed loop, the IAC motor values should be between nine to 12 counts. IAC Reset Procedure with a Scan Tool: Ken Mosher. The Idle Learn Procedure When you're having problems, the first thing worth trying is the idle lean procedure. Step 2: Disconnect IAC valve. And for more GM vehicles projects,check here:GM vehicle repair cases. Locate the IAC valve electrical connector and unplug the IAC valve. Procedure: The ECM controls idle rpm with the IAC (idle air control) valve. sensors are replaced) it is a good idea to perform the idle learn procedure. If not, the adjustments may be tailored by adjusting the minimum air rate screw. The ECM uses non-volatile memory to keep track of the IAC position when the engine and ECM are turned off. Engine oil life interval may be programmed or reset by using a scan tool or the DIC. 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 … Engine idling, verify the scan tool Throttle Body Idle Airflow Compensation value is equal 0% and the engine is … Each car has a unique IAC value that takes into account the condition of the sensors, air and vacuum … Less throttle opening equals higher IAC counts. Use the procedure detailed in the vehicle service manual to remove the IAC valve. To increase idle rpm the ECM moves the IAC valve out allowing more air to pass by the throttle plate. Wait 30 seconds. Ignition ON, engine OFF, perform the Idle Learn or Idle Learn Reset in Configuration/Reset or Module Setup. Start engine. Reconnect the battery and drive the car for 20 minutes to allow the ECM to “relearn.” -Allan Reinike/Tom Keliher Step 3: Remove the IAC valve from the vehicle. The fuse box is located on the passenger side next to the battery. The IAC valve pintle is reset by turning the ignition ON for ten seconds and then OFF. 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. This should clear the ECM of all trouble codes. You are now … Over 20 years of bumper to bumper GM experience. 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. 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