If the calibration has been performed properly, “CAL GOOD” should remain on the screen. To submit your questions or ideas, or to simply learn more about It Still Works, contact us.

When the crank sensor is replaced, it must be resynced to the PCM. The crankshaft sensor on GMC vehicles is synced to the powertrain control module, or PCM. All rights reserved. If the buildup occurs gradually, the PCM “learns” the new home position. Once set, those positions are used to calculate the actual throttle percentage.

This process is automatic. The pedal simply provides an electronic signal, telling the throttle body how much acceleration you’re requesting. In most cases, their diagrams are right from the factory manuals. The proper procedure for resyncing or relearning the crankshaft position is called the "CKP Variation Learn." Calibration Procedure . Let the engine run long enough for it to come off the the fast idle or choke setting. THROTTLE PLATE IDLE POSITION. This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information. 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. Vehicles equipped with a throttle position sensors for year models 1988 through 1992 have an adjustable sensor that has to be calibrated (if replaced with a new one). Code errors can cause your throttle … A motor and gear reduction set inside the throttle body opens and closes the throttle plate to accomplish your request. Eautorepair.net redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. Please enable Cookies and reload the page. []))). Begin by starting the vehicle in park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ou should not attempt the throttle sensor calibration unless you are thoroughly familiar working around engines. Turn off the engine and raise the hood of the GMC vehicle.

Of all the sensors on the engine, the throttle position sensor is the only one that communicates driver input to the computer. 1. Then repeat step #3 one last time. GM Mechanic: Dave Nova, GMC Technician replied 9 years ago. Plug an automotive scan tool's data connector into the vehicle's diagnostic data port. Turn off the engine and raise the hood of the GMC vehicle. It bolts over the throttle plate shaft and has three wires connected with a snap-in plug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lldatadiy.com, on the other hand, uses the factory diagrams.

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n those vehicles, the “gas” pedal isn’t connected to the throttle body by a cable. In order to calibrate the throttle position sensor, the TV cable must be moved through its entire range with the engine running. The easiest way to reset your throttle position sensor is to unhook the negative cable from your battery for up to five minutes or to remove the fuse for your engine control module. Once set, those positions are used to calculate the actual throttle percentage. Shift the GMC vehicle's transmission into park, or first gear for a manual transmission. Locate the accelerator linkage.

4. Turn the engine off, then back on again. The throttle position sensor calibration process measures the lowest and highest line pressures as the TV cable is moved, and internally associates those pressures with the 0% and 100% throttle positions.

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If the transmission does not have proper line pressure variation, the calibration may fail. Precise sensor voltage adjustments are necessary when the new sensor is installed. [])), +((!+[]+(!![])+!![]+!![]+!![]+!![]+!![]+!![]+!![]+[])+(!+[]+(!![])+!![]+!![])+(+!![])+(!+[]-(!![]))+(!+[]+(!![])+!![]+!![]+!![]+!![]+!![]+!![])+(!+[]+(!![])+!![])+(!+[]+(!![])+!![]+!![]+!![]+!![]+!![]+!![]+!![])+(!+[]+(!![])+!![]+!![]+!![]+!![]+!![]+!![])+(+!![]))/+((!+[]+(!![])+!![]+!![]+!![]+[])+(!+[]+(!![])+!![]+!![]+!![])+(!+[]+(!![])-[])+(!+[]+(!![])+!![])+(!+[]+(!![])+!![]+!![]+!![]+!![]+!![]+!![])+(!+[]+(!![])+!![]+!![])+(!+[]+(!![])-[])+(!+[]+(!![])-[])+(+!!

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