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Home >> GMC >> 1992 >> Forward Control 4.3 Z, Automatic >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Diagnosis - A/T >> Description >> TCC Control Components >> Electronic Control Module (ECM)
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Electronic Control Module (ECM)

To determine application of torque converter clutch, ECM receives and processes information from various input devices. These devices may include the vehicle speed sensor, coolant temperature sensor, throttle position sensor, 3rd and 4th gear switches and brake switch. The ECM controls application of torque converter clutch by providing a ground circuit for the TCC solenoid circuit.