When it comes to automotive repair, and, in particular, automatic transmission repair, being on the diagnosing and repairing end of increasing technology is an incredible challenge. When some unexplainable malfunction occurs with the way the computer controls the transmission, it can become a real nightmare on several levels. Keeping track of temperature can save you time and money when it comes to diagnosing a transmission (or possibly not a transmission) problem. A device that is crucial to temperature monitoring is the Transmission Fluid Temperature (TFT) Sensor (Figure 1.) If there is a sensor malfunction, or does not set a code, it can alter systems operations. At the start, the computer would use this temperature information primarily for converter clutch control. Once a predetermined temperature level was reached, the computer would apply the converter clutch. Fast forwarding to today's transmissions, the TFT sensor now has a broad range of influence and affects.
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