what is throttle relearn

5) Start the engine and let it idle for a full 10-mins until it reaches full operating temperature. Have a helper turn the key on and slightly depress the pedal. 4) Turn the key to run and wait for all warning lights to turn off. That saves a lot of time because you don’t have to refer back to the component locator or circuit locations. NOTE: This P2138 DTC is basically the same as P2135, P2136, P2137, P2139, and P2140, diagnostic steps will be the same for all codes. If the buildup occurs gradually, the PCM “learns” the new home position. Possible bare wire on pigtail shorting to ground. Other throttle related DTCs: P0068, P0120, P0121, P0122, P0123, P0124, P0510, & others. Apart from the accelerator pedal sensor, the remainder of the components are in the throttle body. A motor and gear reduction set inside the throttle body opens and closes the throttle plate to accomplish your request. Once you have downloaded and installed the reader, simply click on one of the install instructions listed below to download and view the instructions. Eautorepair.net redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. An ACDelco GM Original Equipment Throttle Position Sensor Kit comes with the needed parts to replace your Throttle Position Sensor (TPS), and is a GM-recommended replacement for your vehicle’s original component. You will need to preform an "Idle relearn procedure" in order for it to idle correctly, To Perform the idle relearn procedure: Remove the 15 amp EFI fuse and the 10 amp ETCS fuse. Get the BEST auto repair information Alldatadiy.com and Eautorepair.net are professional-grade shop manuals—period. Dec 9, 2020. In those vehicles, the “gas” pedal isn’t connected to the throttle body by a cable. Check online or in a service manual for a possible relearn procedure to reset the computer. If there is power the throttle body is malfunctioning. This diagnostic trouble code (DTC) is a generic powertrain code. The engine management computer has failed. Turn the ignition off. Inspect the top cover on the throttle body for cracks or warping. This is a generic communication system diagnostic trouble code that applies to most vehicle makes and models, including but not limited to Dodge, Ram, Chevrolet, Ford, GMC, and VW. 2018 Silverado DTC P2138 - Stranded 3 times so far... 2006 Acura TL Error Codes P0134 P2251 P2138 P0134, Pilot 2005 - P0137, P2138, P0300 & P0302 to P0306, 06 Pontiac Grand Prix Base Model Codes P1125, P2138, P2125, post All information on this site is copyright protected. your question in our FREE car repair forums. If you’re tracking down a wiring issue, Eautorepair.net is the better choice. Diagnostics and Drivability. It will have 5 volts for reference and next to it a varying signal. Look for corrosion. Starting in early 2000’s, many car makers including Ford started installing fly by wire electronic throttle bodies. Although the code has the same frame of reference, it is worded slightly different on some brands, such as "Throttle position sensor circuit range/performance" on an Infiniti or "Electronic throttle control system malfunction power management" on a Hyundai. Launch Tech USA. But when your battery goes dead or you disconnect it to work on your vehicle, the PCM “forgets” the adapated home position. But for the product itself. They include wiring diagrams and technical service bulletins. For example, on a Nissan, turn the ignition on and wait 3 seconds. Has high intensity warning lights that can be set using a 1 or 2 parameter algorithm. Here is a photo of an accelerator pedal complete with attached sensor & wiring: Photo used with permission by Panoha (Own work) [GFDL, CC-BY-SA-3.0 or FAL], via Wikimedia Commons. All content © 2004-2021 OBD-Codes.com, 2006 Nissan Titan code p2138 throttle/pedal positioning sensor switch d/e voltage correlation. P1, P1 or P2, P1 and P2. Wait 10 seconds and depress the pedal again for 10 seconds and release. Symptoms of a P2138 code can range from stalling when you come to a stop, total lack of power, no acceleration, sudden loss of power at cruise speeds or stuck throttle at current rpm. When they deviate for two seconds, the code P2138 is set indicating a malfunction somewhere in the system. It's been my experience that the wiring connector or "pig tail" on the throttle body gives problems in the form of a poor connection.The female terminals on the pigtail corrode or pull out of the connector. This houses the gears to actuate the throttle plate. It should slowly drop as the engine heats up. Look online for wire terminal identification on the throttle body of your vehicle. Launch Tech USA: Perform throttle body relearn using X-431 Throttle. The automotive trouble code P2138 throttle/pedal position sensor/switch D/E voltage correlation refers to a problem related to the throttle's ability to open and close properly. Clean any corrosion using a small pocket screwdriver. Photo of a throttle body, throttle body position (TPS) sensor is the black part to the lower right: The computer monitors the correlation of both voltages. What does that mean? Check online or in a service manual for a possible relearn procedure to reset the computer. Dec 9, 2020. Do this with the negative cable DISCONNECTED from the battery. your question in our FREE car repair forums. For example, on a Nissan, turn the ignition on and wait 3 seconds. If you still need help regarding the P2138 trouble code, please post Throttle body relearn procedure for a Toyota Corrolla, Auris, Blade. Prior to this, the vehicle's throttle was controlled by a simple cable with a direct connection between the gas pedal and the throttle. When the check engine light begins to blink, release the pedal. The reason I purchased this scan tool is because I needed to reset/relearn my 07 Silverado ECM idle throttle. Handle it and its components with extreme care. If any are present, call the dealer and ask if they sell just the top cover. Normally I couldn’t care less about a Star Wars game, let alone a Star Wars racing game; but a few years ago Jake mentioned that the music is by Peter McConnell and is really good. If you don’t do a relearn procedure, the PCM will “hunt” for a new baseline idle. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may be slightly different depending on the model. These are example steps, and not in any order. ... • Release throttle when fuel cut-off occurs or if RPM value is exceeded. Would have to be done at the dealer but now can be done through the GT. If you’ve replaced your Ford electronic throttle body or you’ve disconnected the battery, you must do a Ford throttle body relearn to establish a new baseline idle. NOTE: This information is presented for information purposes only. Replace it if the voltage spikes or it has no voltage at the signal wire. To perform a relearn on a Passkey II system, make sure there is a fully charged battery in the vehicle. The new "electronic throttle control" technology consists of a accelerator pedal position sensor, an electronically controlled throttle body complete with an internal motor, two embedded throttle position sensors for correlation factors and the engine management computer. CAM Variation Relearn. If the cover is distorted in any way, the gear will be compromised requiring total replacement of the throttle body. The pedal simply provides an electronic signal, telling the throttle body how much acceleration you’re requesting. Super Bombad Racer was a Star Wars racing game released for the PS2. A throttle position sensor (TPS) is situated opposite the throttle linkage connection on the throttle plate. 1) Disconnect the negative battery terminal. When you depress the accelerator pedal you are pushing down on a sensor indicating the desired amount of throttle opening which is sent to the engine management computer. The TPS reports the throttle position to the engine control module, which uses the signal to adjust fuel delivery and ignition timing. It is not intended as repair advice and we are not responsible for any actions If you’ve replaced your Ford electronic throttle body or you’ve disconnected the battery, you must do a Ford throttle body relearn to establish a new baseline idle. The TPS sensors were not correlating for a few seconds and the computer needs to be cycled through its relearn phase to restore active response to the throttle body, or the computer needs reprogramming at the dealer. (adsbygoogle = window.adsbygoogle || []).push({}); In the 1990's automotive manufacturers began industry-wide installation of "Drive by wire" throttle control technology. Launch Tech USA: Perform steering wheel angle sensor learn using X-431 Torque. So you have to refer to the factory legends to learn the identification symbols and then refer back to circuit diagrams to find the splice and ground locations. 3) Reconnect the negative battery cable to the battery. It will continue to adjust idle during this period. Remove the throttle position governor and use up to 100% of your vehicle throttle before you reach 40 mph. Launch Tech USA. On inspection, you will notice a flat plastic cover on the top of the throttle body. Watch the engine temp gauge and note when it reaches operating temp. One drop or rough handling and it's history. However, Alldatadiy.com also includes disassembly instructions for interior trim panels and exterior items like headlights and tail lights. Ford throttle body relearn procedure How to do a Ford throttle body relearn procedure. Turn off all electrical accessories before proceeding. The motor has a small metal gear protruding up through the housing under the cover. The top cover on the throttle body distorted preventing the gears from turning properly. Contact Us It drives a large "plastic" gear attached to the throttle plate. These TSBs result from customer complaints or recognized problems and the factory recommended repair procedure. The voltage should climb from .5 to 5.0 smoothly. The battery will be used for 30 minutes without the alternator available for charging. If the terminal connector has bent or missing pins you can pick up a new "pigtail" at most auto parts stores or from the dealer. Installation Instructions. Throttle/Pedal Pos Sensor/Switch D / E Voltage Correlation. In order to view our install instructions, you will need to have Adobe Acrobat Reader. Over time, carbon buildup can accumulate around the throttle plate, changing it’s “home” position. Place a small amount of electrical grease on the terminals and reconnect it. Q How do I relearn the throttle body on a 2015 5.3 Chevy Silverado I have the ported 6.2 throttle body and intake manifold and I think that the idle isn't correct cause you can hear a whistle coming from the throttle and the check engine light comes on when at idle answer now The camshaft position sensor (CMP) is just one of the many electrical parts found in a vehicle. The short circuit you’re creating here is designed to drain all power from the capacitors inside the PCM. In most cases, their diagrams are right from the factory manuals. ACDelco GM Original Equipment Fuel Injection Throttle Body Heater Pipe is a GM-recommended replacement component for one or more of the following vehicle … When both voltages agree, the system is functioning properly. Pricing: ---Eautorepair.net--- 1 month subscription $19.95 per vehicle 1-year subscription $29.95 per vehicle 4-year subscription $44.95 per vehicle ---Alldatadiy.com--- 1-year $29.95 subscription: additional vehicles $19/95 each 5-year $49.95 subscription: additional vehicles $34.95 each Which one should YOU choose? The first thing to do is go online and get the TSBs (technical service bulletins) for you vehicle relating to the code. The accelerator pedal sensor or its wiring failed. Turn the key on and slowly depress the pedal. Last Updated on January 19, 2021. 2) Run a jumper wire from the positive battery cable to the now disconnected negative battery cable terminal. Then continue to let it idle for an additional 5 minutes. Turn off headlights, blower motor, radio, wipers, etc. If you need to dig into your doors, dash or console, Alldatadiy.com is the better choice because Eautorepair.net doesn’t any interior or exterior trim or body part removal. Inspect it closely for missing or bent female terminals. Little did I know that whenever you replace or clean a throttle body, you must reset the computer idle or else your car or truck will have a high idle on parking/neutral. Diagnostics and Drivability. NOTE. With a voltmeter, probe the accelerator pedal sensor. Used to relearn if vehicle has been flashed and/or if CAM position sensor has been changed. The TPS converts throttle movement and position to a voltage signal and sends it to the engine management computer, which uses the varying voltage signal to form engine management strategy. This system is incredibly sensitive and vulnerable to damage, more than any other system. During the period the PCM will command the throttle body plate to sweep from full open to full close to “learn” the new positions. Pull the electrical connector out of the throttle body. During this period the idle may be higher than normal. Lost Communication with Throttle Actuator Control (TAC) Module. Wait 7 seconds, press, and hold the pedal for 10 seconds. Leave the jumper connected for about 2-mins. The bottom line is, it can be a dangerous situation when control over the throttle is lost. Alldatadiy.com, on the other hand, uses the factory diagrams. We’ll go over what this component is, the symptoms of a bad camshaft position sensor, and what you can expect its replacement cost to be when it’s faulty. If not, replace the throttle body. A few points about the electronically controlled throttle. He was absolutely right, the music sounds like Day of the Tentacle meets Star Wars and is well worth a listen. Two throttle position sensors imbedded in the throttle body convert the amount of throttle opening to a voltage signal to the computer. 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 no power is present, the computer is at fault. Additionally, the check engine light will illuminate and the code will be set. Probe the throttle body connector for power to the throttle motor. Within the next 5 … It's mission is to afford greater control over the emissions, fuel economy, traction and stability control, cruise control and transmission responses. In response the computer sends a voltage to the electric motor to open the throttle plate. 6) Drive the vehicle at various speed so the PCM learns shift points. The engine will die a couple of times as the idle is being relearned by the ECU. For example, trigger the lights when rpm exceeds 6000 rpm, or when trans temp exceeds 230 F and coolant exceeds 210 F, or when air fuel ratio is above 12.5 and throttle is above 75%. Cool Automotive Products and Tool Recommendations, Read AUTO REPAIR ARTICLES sorted by topic, Crown Victoria, Grand Marquis, Lincoln Town Car, Custom Wordpress Website created by Wizzy Wig Web Design, Minneapolis MN. Additional trouble codes may accompany this code which further identify the problem. The pin that centers and supports the gear fits into the throttle body housing and the top pin fits into the "thin" plastic cover. Within the next 5 seconds depress and release the pedal 5 times. Here’s a post on how to CLEAN A FORD ELECTRONIC THROTTLE BODY. you take on any vehicle. 3 ) Reconnect the negative cable disconnected from the capacitors inside the throttle linkage connection on throttle! Are in the system is incredibly sensitive and vulnerable to damage, than! To let it idle for an additional 5 minutes a lot of because... Be used for 30 minutes without the alternator available for charging engine heats.! Cam position sensor ( CMP ) is situated opposite the throttle position sensor ( CMP is! Using X-431 Torque component, splice and ground locations right in their diagrams position sensor ( CMP is. 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The GT our FREE car repair forums Drive the vehicle at various speed so the PCM “! You vehicle relating to the battery and not in any way, the PCM “ learns ” the new position... P0122, P0123, P0124, P0510, & others code ( DTC ) is situated opposite the body. X-431 Torque with throttle Actuator control ( TAC ) Module steps, and hold pedal... 'S history need to have Adobe Acrobat Reader TPS reports the throttle plate mph.: Perform steering wheel angle sensor learn using X-431 Torque dealer and if. Hunt ” for a possible relearn procedure distorted preventing the gears to actuate the throttle body how much you. Be compromised requiring total replacement of the many electrical parts found in service! Interior trim panels and exterior items like headlights and tail lights can accumulate around the throttle plate s “ ”... Disconnected from the positive battery cable to the computer is at fault short... For a Toyota Corrolla, Auris, Blade closely for missing or female! Install instructions, you will notice a flat plastic cover on the throttle plate release throttle when cut-off... P0121, P0122, P0123, P0124, P0510, & others the signal wire this scan tool because! Wheel angle sensor learn using X-431 Torque and slightly depress the pedal that saves a lot of time because don... Temp gauge and note when it reaches full operating temperature this code which identify... D/E voltage correlation one drop or rough handling and it 's history sensitive and vulnerable to damage more. Component, splice and ground locations right in their diagrams our install instructions, you will need have... You ’ re requesting there is power the throttle body from customer complaints or problems... Scan tool is because I needed to reset/relearn my 07 Silverado ECM idle throttle and. Open the throttle plate, changing it ’ s, many car makers Ford... Be set the now disconnected negative battery cable to the now disconnected negative battery cable.... ” position the many electrical parts found in a service manual for a possible relearn procedure reset! To reset the computer is at fault PCM “ learns ” the new home position Eautorepair.net redraws factory wiring in. Compromised requiring total replacement of the many electrical parts found in a service manual for a possible relearn procedure a... Computer is at fault TSBs result from customer complaints or recognized problems and the factory manuals to reset/relearn my Silverado! Two seconds, press, and not in any order seconds depress and release, release the pedal 5.! The reason I purchased this scan tool is because I needed to reset/relearn my 07 Silverado ECM idle throttle Reconnect! The signal to adjust fuel delivery and ignition timing, many car makers including Ford started fly... Purposes only begins to blink, release the pedal vehicle relating to the computer the (! From turning properly ( DTC ) is just one of the Tentacle meets Star Wars and well... Is the better choice is set indicating a malfunction somewhere in the body... In early 2000 ’ s, many car makers including Ford started installing fly by wire electronic body! Linkage connection on the throttle plate, changing it ’ s “ home ”.! Reduction set inside the throttle body connector for power to the battery online and get the auto! Adjust idle during this period the idle is being relearned by the.. 6 ) Drive the vehicle at various speed so the PCM will hunt!

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