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See Also: Code U0100 #2 – Unpredictable Shifting If code P0700 shows up, you may have a problem with your transmission control module. In any event, get your vehicle checked out immediately by a mechanic or use your own scan tool to check for any Diagnostic Trouble Codes (DTC). But if you notice any problems with your shifting in addition to the Check Engine light being on, then it is most likely a problem with your transmission control module or some other component of your transmission system. If the Check Engine warning light (or transmission warning light) illuminates on your dashboard, it could mean several things. Related: 4 Bad Neutral Safety Switch Symptoms #1 – Check Engine or Transmission Light Fortunately, there are a few basic symptoms that you’ll most likely notice before this happens. A bad TCM will spell trouble for your vehicle and your ability to drive it. If you ever have a problem with your transmission control module, you’ll need to have it inspected right away. Read Also: What Is Code $7E9 On a Scan Tool? Signs of a Bad Transmission Control Module Getting your hands on a vehicle-specific service manual is the best way to confirm where it’s mounted but searching online for your vehicle’s year, make, and model will also get you there. But an Allison T87 transmission would have its TCM located by the driver’s side battery on the fan shroud.ĭon’t start taking things apart trying to guess where it might be. Sometimes it’s found under the center console in the interior, under the dash by the firewall, under the hood near the battery, inner fender panel, or even the glovebox.įor example, the TCM of Chevy’s 4L60E transmission is normally found near the back of the transmission case (right under the cover). It should be just below the engine control module’s position. The TCM can often be found below the cover at the back of the transmission case. Its exact location will vary from one vehicle to the next. If you don’t know where to find the transmission control module, don’t worry, you’re not alone. See Also: PCM vs ECU vs ECM vs TCM (What’s the Difference?) Where is the TCM Located? In short, the TCM is continuously working behind the scenes to deliver a smooth driving experience with optimal fuel efficiency.Ī car or truck’s TCM will likely never need replacing, but if you have a bad transmission control module, immediate replacement (or repair) is necessary. This information is used to calculate the optimal timing and gear shifting required for your car. The TCM interprets and processes data received from components such as the throttle position sensor, vehicle speed sensor, and engine load. Think of the TCM as the brain of your transmission it communicates with various sensors and components to ensure that your vehicle shifts gears smoothly and efficiently. Rather than relying on hydraulic or mechanical control over a transmission system, newer vehicles use a transmission control module instead. The transmission control module (TCM) is a vital component of any vehicle with an automatic transmission system. #3 – Problems Shifting Into Higher Gears.#1 – Check Engine or Transmission Light.Signs of a Bad Transmission Control Module.
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