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Drive-By-Wire Throttle "Calibration" Procedures = Lore/Legend? #5349976 02/14/20 01:47 PM
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LoneRanger Offline OP
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There are these so called procedures floating about the interweb claiming that performing a rain dance with your ignition and electronic accelerator pedal in drive-by-wire throttle vehicles, achieves some sort of calibration or lining up of the stars between 1. The electronic accelerator pedal 2. The ECU and 3. the throttle plate position within the throttle body.

It usually consists of keying on the ignition without cranking the motor and pressing the gas pedal and releasing then turn key off, Lather Rinse Repeat, three or four times.

Since throttle-by-wire systems feature two sensors on the pedal assembly and also on the throttle body which cross check the voltage, I say any perceived results from doing these things is placebo effect.

What do you think, Legend or Legit?



'19 F-150 2.7 twin turbo DI V6 .....(Motorcraft synblend 5W30 SN+)
'19 GMC Terrain 1.5 turbo DI I4....(Warren 0W20 1DexosGen2)
'16 Moto Guzzi NTX 1151cc v-twin (Eni 10W60)
Re: Drive-By-Wire Throttle "Calibration" Procedures = Lore/Legend? [Re: LoneRanger] #5349989 02/14/20 01:58 PM
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KGMtech Offline
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Virtually a myth, or legend. I've never experienced any difference in the throttle action when the "rain dance" or nothing was done after disconnecting / reconnecting throttle body wiring. Having said that, my experience is limited to Fords and VW.


2017.5 Nissan Rogue SV FWD
2013 Nissan Maxima SV
2009 Ford Flex SEL FWD
1984 Yamaha XJ750RL
Re: Drive-By-Wire Throttle "Calibration" Procedures = Lore/Legend? [Re: LoneRanger] #5350004 02/14/20 02:09 PM
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PimTac Offline
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Not all systems are the same as I understand it.


2017 Mazda CX5
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Re: Drive-By-Wire Throttle "Calibration" Procedures = Lore/Legend? [Re: LoneRanger] #5350012 02/14/20 02:21 PM
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Astro14 Offline
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The ECM/TCM in the Mercedes W220 does “learn” the owner’s driving style and adapt.

It is roughly that process you describe to reset the adaptations.

What works on a 14-19 year old German luxury car probably won’t work on the majority of cars out there.


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Re: Drive-By-Wire Throttle "Calibration" Procedures = Lore/Legend? [Re: LoneRanger] #5350029 02/14/20 02:42 PM
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Gimpy1 Offline
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Most fly by wire vehicle do have a method to "calibrate" the throttle blade. VW's must have a TBA or throttle blade adjustment anytime the throttle body is removed or cleaned or the battery is disconnected. This can only be done with the proper scan tool. Most vehicle have a similar methods, so no it's not a "rain dance" and if not properly done the vehicle may set codes, and or have driveability issues. Reach manufacturer will have a process to correlate the actual pedal with the throttle body blade.

Re: Drive-By-Wire Throttle "Calibration" Procedures = Lore/Legend? [Re: LoneRanger] #5350046 02/14/20 03:06 PM
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750IX Offline
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My 2013 Bmw 750 gets a little laggy after long periods of slow city stop and go trafic. I turn on ignition, wot in 30 sec, ignition of and then let go of the pedal. Wait 2 minutes before drive. This helps but not sure what it does. Some say it resets the throthle body and some say it fools the car to believe it was driving in 30 sec with wot. The problem has to do with the adaptive throthle/gearbox somehow

Last edited by 750IX; 02/14/20 03:07 PM.
Re: Drive-By-Wire Throttle "Calibration" Procedures = Lore/Legend? [Re: LoneRanger] #5350147 02/14/20 05:07 PM
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nthach Offline
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When I replaced the battery on a Sienna and a Forester, the only things I've done was KOEO deadhead for 30 seconds and then start the engine and let it idle to operating temp or the fans cycling to relearn the DBW throttle and idle strategies. I learned that from a Honda tech a while ago.

On a Prius it was close to a non-DBW car and I let the DBW/idle learn passively.

On a Matrix, when I had to disconnect the battery I did the deadhead but the car ran like crap until it stalled. I started it up again and it took about 30 minutes of idling and stalling for the DBW and idle relearn to happen.

Re: Drive-By-Wire Throttle "Calibration" Procedures = Lore/Legend? [Re: LoneRanger] #5350200 02/14/20 06:28 PM
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eljefino Offline
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Had an 02 camry with early DBW that did not want to idle after the battery was disconnected-- like after I changed the clutch.

Took it up to 55, coasted in gear, then dropped it to neutral, then slowly stopped. It at least idled after that.

Re: Drive-By-Wire Throttle "Calibration" Procedures = Lore/Legend? [Re: LoneRanger] #5350204 02/14/20 06:37 PM
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cjolson140 Offline
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I also had an 02 Camry that wouldn’t idle after disconnecting the battery - my solution was to clean the filthy throttle body with a toothbrush, so it could re-learn the idle more easily.

Re: Drive-By-Wire Throttle "Calibration" Procedures = Lore/Legend? [Re: LoneRanger] #5350212 02/14/20 06:42 PM
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14Accent Offline
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Early Toyota's were TERRIBLE after battery disconnect. They just would not idle. Thankfully, that was figured out quickly.

There's really no way to "calibrate" an ETB by turning a key on and off. Most vehicles will run a self-diagnostic every time the key is turned off. If you have the hood open and listen, you can hear it click and clack for a few seconds as it relearns it's closed position. That, and the APP/TP sensors 1 and 2 are continuously monitored for correlation, any hiccup and you'll get limp mode.


2013 Chevrolet Volt - Saves enough in fuel to pay for itself!

2007 Chevrolet Impala LT
Re: Drive-By-Wire Throttle "Calibration" Procedures = Lore/Legend? [Re: LoneRanger] #5350218 02/14/20 06:52 PM
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WhyMe Offline
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my 99 outback , whne i disconnected the battery would have to relearn to idle even though it was a cable system TB. when i disconnected the battery , the ecm would lose its settings for the Idle air controller. i had to drive around for a while for it to relearn . got tired of this and got a obd plugin memory saver.

Re: Drive-By-Wire Throttle "Calibration" Procedures = Lore/Legend? [Re: LoneRanger] #5350287 02/14/20 08:29 PM
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zzyzzx Offline
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You can use an expensive OBDII device, or just drive the car.

Re: Drive-By-Wire Throttle "Calibration" Procedures = Lore/Legend? [Re: nthach] #5351663 02/16/20 11:10 AM
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LoneRanger Offline OP
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Originally Posted by nthach
When I replaced the battery on a Sienna and a Forester, the only things I've done was KOEO deadhead for 30 seconds and then start the engine and let it idle to operating temp or the fans cycling to relearn the DBW throttle and idle strategies. I learned that from a Honda tech a while ago.

On a Prius it was close to a non-DBW car and I let the DBW/idle learn passively.

On a Matrix, when I had to disconnect the battery I did the deadhead but the car ran like crap until it stalled. I started it up again and it took about 30 minutes of idling and stalling for the DBW and idle relearn to happen.


What's KOEO mean, Key On Engine Off ?



'19 F-150 2.7 twin turbo DI V6 .....(Motorcraft synblend 5W30 SN+)
'19 GMC Terrain 1.5 turbo DI I4....(Warren 0W20 1DexosGen2)
'16 Moto Guzzi NTX 1151cc v-twin (Eni 10W60)
Re: Drive-By-Wire Throttle "Calibration" Procedures = Lore/Legend? [Re: LoneRanger] #5351819 02/16/20 02:35 PM
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celicaxx Offline
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On my mother's Five Hundred, the drive by wire throttle body just straight out failed one day, and I got a remanned one and put it in. The procedure was just to disconnect the battery, try to drain some power with the brake pedal, and then let the car idle for 20 minutes/operating temp without touching the gas to relearn everything.

Re: Drive-By-Wire Throttle "Calibration" Procedures = Lore/Legend? [Re: LoneRanger] #5352120 02/16/20 07:40 PM
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Anduril Offline
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I had to replace the throttle body on my XTerra and when I did, I had a check engine light and a very high idle until I successfully did the relearn process.


2015 Nissan Versa Note 1.6/5MT
2012 Toyota Tacoma 2.7/4AT
2007 Toyota Camry 2.4/5AT
2005 Nissan XTerra 4x4 4.0/6MT
2002 Mustang GT Convertible 4.6/5MT
2009 Kawasaki Vulcan 900
2013 Hyosung ST7
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