Do you need to do a throttle Relearn on GM vehicle?

After cleaning the throttle body on a GM vehicle, you may need to perform a throttle/idle relearn. After cleaning the throttle body on a GM vehicle, you may need to perform a throttle/idle relearn.

How to do throttle body idle and volume relearn?

Turn the ignition switch off for at least 10 seconds. Again, turn the ignition on for at least 2 seconds. Turn the ignition off for at least 10 seconds. This action will inform the computer on the new release position of the accelerator pedal and the closed position. Now that this is done, we can move on to the next step.

Which is an example of a throttle body alignment?

This procedure cycles the motorized throttle body through various states (idle, part throttle, WOT) to relearn their positions. Some examples of reasons to perform a TBA:

What happens when you replace the throttle body?

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. If you don’t do a relearn procedure, the PCM will “hunt” for a new baseline idle.

How to do throttle body cleaning and idle relearn?

1. Start and idle the engine in PARK for 3 minutes. 2. With a scan tool, monitor desired and actual RPM. 3. The ECM will start to learn the new idle cells and Desired RPM should start to decrease. 4. Ignition OFF for 60 seconds.

How long does it take for GM throttle body to relearn?

If you don’t do a relearn procedure, the PCM will “hunt” for a new baseline idle. 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. 1) Start the engine and let it idle in park for 3 minutes.

How does the ECM learn the new throttle position?

Perform the Throttle Learn Procedure. Refer to Throttle Learn. The engine control module (ECM) learns the idle position of the throttle plate to ensure the cor- rect idle. Anytime the throttle body is cleaned or replaced, the ECM must learn the new throttle position.

What’s the throttle relearn procedure for a new battery?

Step 2: Press the accelerator pedal ALL THE WAY to the floor and hold it for 40 seconds. Step 3: Release the accelerator pedal ALL THE WAY and count for 35 seconds. Step 4: Press the accelerator pedal all the way to the floor and hold for 30 seconds. Step 5: Release the accelerator pedal and count for 25 seconds.