Throttle body relearn procedure for a Toyota Corrolla, Auris, Blade. Look online for wire terminal identification on the throttle body of your vehicle. Check online or in a service manual for a possible relearn procedure to reset the computer. They include wiring diagrams and technical service bulletins. A throttle position sensor (TPS) is situated opposite the throttle linkage connection on the throttle plate. This system is incredibly sensitive and vulnerable to damage, more than any other system. Other throttle related DTCs: P0068, P0120, P0121, P0122, P0123, P0124, P0510, & others. Diagnostics and Drivability. This houses the gears to actuate the throttle plate. Check online or in a service manual for a possible relearn procedure to reset the computer. Here’s a post on how to CLEAN A FORD ELECTRONIC THROTTLE BODY. Handle it and its components with extreme care. Installation Instructions. 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. It should slowly drop as the engine heats up. 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. your question in our FREE car repair forums. Prior to this, the vehicle's throttle was controlled by a simple cable with a direct connection between the gas pedal and the throttle. you take on any vehicle. Then continue to let it idle for an additional 5 minutes. That saves a lot of time because you don’t have to refer back to the component locator or circuit locations. P1, P1 or P2, P1 and P2. When they deviate for two seconds, the code P2138 is set indicating a malfunction somewhere in the system. For example, on a Nissan, turn the ignition on and wait 3 seconds. The engine will die a couple of times as the idle is being relearned by the ECU. It drives a large "plastic" gear attached to the throttle plate. The first thing to do is go online and get the TSBs (technical service bulletins) for you vehicle relating to the code. Over time, carbon buildup can accumulate around the throttle plate, changing it’s “home” position. If you don’t do a relearn procedure, the PCM will “hunt” for a new baseline idle. A few points about the electronically controlled throttle. ACDelco GM Original Equipment Fuel Injection Throttle Body Heater Pipe is a GM-recommended replacement component for one or more of the following vehicle … These are example steps, and not in any order. Turn the key on and slowly depress the pedal. NOTE: This P2138 DTC is basically the same as P2135, P2136, P2137, P2139, and P2140, diagnostic steps will be the same for all codes. But for the product itself. The TPS reports the throttle position to the engine control module, which uses the signal to adjust fuel delivery and ignition timing. Inspect the top cover on the throttle body for cracks or warping. 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. Throttle/Pedal Pos Sensor/Switch D / E Voltage Correlation. 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? 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. (adsbygoogle = window.adsbygoogle || []).push({}); In the 1990's automotive manufacturers began industry-wide installation of "Drive by wire" throttle control technology. The battery will be used for 30 minutes without the alternator available for charging. Alldatadiy.com, on the other hand, uses the factory diagrams. 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 But when your battery goes dead or you disconnect it to work on your vehicle, the PCM “forgets” the adapated home position. The camshaft position sensor (CMP) is just one of the many electrical parts found in a vehicle. Within the next 5 … All information on this site is copyright protected. Place a small amount of electrical grease on the terminals and reconnect it. If any are present, call the dealer and ask if they sell just the top cover. Two throttle position sensors imbedded in the throttle body convert the amount of throttle opening to a voltage signal to the computer. If you still need help regarding the P2138 trouble code, please post NOTE. 5) Start the engine and let it idle for a full 10-mins until it reaches full operating temperature. 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. Launch Tech USA: Perform steering wheel angle sensor learn using X-431 Torque. Launch Tech USA: Perform throttle body relearn using X-431 Throttle. 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. Starting in early 2000’s, many car makers including Ford started installing fly by wire electronic throttle bodies. However, Alldatadiy.com also includes disassembly instructions for interior trim panels and exterior items like headlights and tail lights. Launch Tech USA. 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. Has high intensity warning lights that can be set using a 1 or 2 parameter algorithm. Launch Tech USA. 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. Turn the ignition off. 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. 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. For example, on a Nissan, turn the ignition on and wait 3 seconds. The accelerator pedal sensor or its wiring failed. If not, replace the throttle body. Dec 9, 2020. The pedal simply provides an electronic signal, telling the throttle body how much acceleration you’re requesting. 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. The motor has a small metal gear protruding up through the housing under the cover. 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. 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. Within the next 5 seconds depress and release the pedal 5 times. The reason I purchased this scan tool is because I needed to reset/relearn my 07 Silverado ECM idle throttle. 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%. Contact Us What does that mean? 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. Apart from the accelerator pedal sensor, the remainder of the components are in the throttle body. Lost Communication with Throttle Actuator Control (TAC) Module. Probe the throttle body connector for power to the throttle motor. During this period the idle may be higher than normal. 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. CAM Variation Relearn. Leave the jumper connected for about 2-mins. It will continue to adjust idle during this period. Diagnostics and Drivability. Dec 9, 2020. The engine management computer has failed. Get the BEST auto repair information Alldatadiy.com and Eautorepair.net are professional-grade shop manuals—period. 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. 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. The top cover on the throttle body distorted preventing the gears from turning properly. 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. If there is power the throttle body is malfunctioning. Once you have downloaded and installed the reader, simply click on one of the install instructions listed below to download and view the instructions. NOTE: This information is presented for information purposes only. 1) Disconnect the negative battery terminal. Turn off headlights, blower motor, radio, wipers, etc. Wait 7 seconds, press, and hold the pedal for 10 seconds. If you’re tracking down a wiring issue, Eautorepair.net is the better choice. If no power is present, the computer is at fault. This diagnostic trouble code (DTC) is a generic powertrain code. 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. If the buildup occurs gradually, the PCM “learns” the new home position. Inspect it closely for missing or bent female terminals. 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. The voltage should climb from .5 to 5.0 smoothly. It is not intended as repair advice and we are not responsible for any actions Last Updated on January 19, 2021. When the check engine light begins to blink, release the pedal. He was absolutely right, the music sounds like Day of the Tentacle meets Star Wars and is well worth a listen. Have a helper turn the key on and slightly depress the pedal. 3) Reconnect the negative battery cable to the battery. A motor and gear reduction set inside the throttle body opens and closes the throttle plate to accomplish your request. Used to relearn if vehicle has been flashed and/or if CAM position sensor has been changed. Clean any corrosion using a small pocket screwdriver. On inspection, you will notice a flat plastic cover on the top of the throttle body. It's mission is to afford greater control over the emissions, fuel economy, traction and stability control, cruise control and transmission responses. The bottom line is, it can be a dangerous situation when control over the throttle is lost. 6) Drive the vehicle at various speed so the PCM learns shift points. With a voltmeter, probe the accelerator pedal sensor. Wait 10 seconds and depress the pedal again for 10 seconds and release. If the cover is distorted in any way, the gear will be compromised requiring total replacement of the throttle body. Ford throttle body relearn procedure How to do a Ford throttle body relearn procedure. In response the computer sends a voltage to the electric motor to open the throttle plate. During the period the PCM will command the throttle body plate to sweep from full open to full close to “learn” the new positions. Watch the engine temp gauge and note when it reaches operating temp. 2) Run a jumper wire from the positive battery cable to the now disconnected negative battery cable terminal. Possible bare wire on pigtail shorting to ground. It will have 5 volts for reference and next to it a varying signal. In those vehicles, the “gas” pedal isn’t connected to the throttle body by a cable. When both voltages agree, the system is functioning properly. One drop or rough handling and it's history. 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