snap on modis software version 2.3 gm throttle position relearn

The first computers appeared in cars during the late 1960s and early 1970s. Let’s begin with a brief overview of how car computers evolved, and the role of the powertrain control module in today’s vehicles. We’ll help you understand how reflashing works and what your options are, so you can make the right decision for your car and budget. Whether you’re thinking of reflashing your own powertrain control module or purchasing a replacement, our guide will answer all your questions. Then repeat step #3 one last time.Everything You Need to Know About PCM Reflashing Scan for codes and if you get throttle body related codes, clear them.Ĥ) If the idle speed is still off, drive the vehicle at speeds above 44-mph and operate several acceleration and deceleration cycles.

During these run periods you may see a check engine light. During that period the idle may be higher idle than normal.Ģ) After 3 minutes, turn the engine off and leave it off for 60- seconds.ģ) Start the engine again and let it idle in park for 3 minutes one more time. Here’s the throttle body relearn procedureġ) Start the engine and let it idle in park for 3 minutes. It will eventually learn it on its own, but it may take over a week of driving, during which time you will experience high and low idle speeds and possibly rough idle. If you don’t do a relearn procedure, the PCM will “hunt” for a new baseline idle.

If you replace the throttle body, the PCM won’t know and will continue to use the adaptive settings as if the carbon buildup is still in place. But when your battery goes dead or you disconnect it to work on your vehicle, the PCM “forgets” the adapative home position. If the buildup occurs gradually, the PCM “learns” the new home position. Over time, carbon buildup can accumulate around the throttle plate, changing it’s “home” position. A motor and gear reduction set inside the throttle body opens and closes the throttle plate to accomplish your request. The pedal simply provides an electronic signal, telling the throttle body how much acceleration you’re requesting. In those vehicles, the “gas” pedal isn’t connected to the throttle body by a cable. Many car makers including GM started installing fly by wire electronic throttle bodies. 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. Make and Model > GMC Trucks > Acadia > GM throttle body relearn procedure GM throttle body relearn procedure How to do a GM throttle body relearn procedure

Snap on modis software version 2.3 gm throttle position relearn