gm iac reset procedure

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