Timeline for Ideal TPS Voltage Range for calibration
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12 events
| when toggle format | what | by | license | comment | |
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| Feb 9, 2022 at 15:03 | comment | added | LFY MP7.3 | @F Dryer - Yes, manufacturer's data is always best but sometimes hard to find. I think I have to look in some French car forums. I also try alldata.diy. | |
| Feb 8, 2022 at 19:52 | vote | accept | LFY MP7.3 | ||
| Feb 8, 2022 at 18:05 | comment | added | F Dryer | Nariman Asgharian, User manual - is this the owner's manual? Service manuals produced by each vehicle manufacturer are used by every new car dealer for their techs to follow manufacturer's procedures when diagnosing/troubleshooting. The public can buy these manuals, subscribe to Alldata.diy or Mitchell for online access to manufacturers service manuals. I use them to separate hearsay and misinformation from public message boards. | |
| Feb 8, 2022 at 17:58 | comment | added | F Dryer | HandyHowie, One brand of GM vehicle service manuals do not mention any calibration of throttle position sensors. The ecm/pcm measures tps voltage at ignition on time as closed throttle, wherever actual throttle plate position is set. In one GM model, worn tps' inadvertently raised idle rpm consistently. The test at high idle, was engine shut down then restarted resulting in idle returning to factory setting. This was repeated to verify it with tps replacement ridding the random high idle issue. I don't know if every EFI system reads tps value at ignition on time. | |
| Feb 7, 2022 at 21:27 | comment | added | Pᴀᴜʟsᴛᴇʀ2♦ | @NarimanAsgharian - The relearn process is recalibrating the TPS so the ECU understands its position and the voltage ranges involved. Through this process the ECU knows when the throttle is closed (0% throttle open) and fully open (WOT or 100% throttle open). Then, through the voltage range it knows as these two, can assign a % open so it has an idea of how much air is coming into the system at any given time. Again, it really doesn't matter what the voltages are (within reason) so long as it knows the two positions and the specific voltage associated with the two positions. | |
| Feb 7, 2022 at 19:21 | comment | added | LFY MP7.3 | @F Dryer - You are right but the main problem here is that the User Manual hasn't provided any useful data about TPS voltages or calibration. | |
| Feb 7, 2022 at 19:19 | comment | added | LFY MP7.3 | @Pᴀᴜʟsᴛᴇʀ2 - If Relearning is the same as manual calibration, I know how to do it. But if it involves doing another procedure to make ECU relearn the TPS, then I'm mostly unfamiliar with the process though I have heard something about turning the ignition on and off and flooring the throttle and such stuff. | |
| Feb 7, 2022 at 12:22 | comment | added | Pᴀᴜʟsᴛᴇʀ2♦ | @NarimanAsgharian - The whole purpose of doing a TPS relearn is so the ECU knows when the throttle is closed and when it's at WOT. It does this by reading what voltage is at the given positions. Because of this, it really doesn't matter what the voltages are. If the TPS relearn is done correctly and the mechanical parts in question are in good repair, the ECU will know what the values should be and will respond accordingly. | |
| Feb 7, 2022 at 7:08 | comment | added | HandyHowie | @FDryer. Are you saying this is incorrect? | |
| Feb 7, 2022 at 3:04 | comment | added | F Dryer | It may be wiser to use service manuals than unverified online sources of (mis)information. | |
| Feb 6, 2022 at 14:30 | comment | added | LFY MP7.3 | Thanks for your answer but during the time that I tested different settings I experienced some differences in engine behavior. When I set the idle at 0.48V, it was jerky when I let off the throttle. I changed the setting and it got smoother. When I set it at 0.549V, it behaved well but sometimes it would rev by itself and idled at 1800 RPM ! This is why I wanted to know which setting is the best. | |
| Feb 6, 2022 at 12:23 | history | answered | HandyHowie | CC BY-SA 4.0 |