gm iac reset procedure

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