![]() If the ECU is not designed to work with a TCU, as in the case with a manual transmission car, then the automatic transmission will delay to shift or will not engage gears smoothly. An engine ECU is programmed to work with an automatic transmission Control unit (TCU computer) to facilitate prompt, smooth and appropriate gear shifting in response to engine load and speed. In this regard, the ECU affects fuel consumption. The ECU relies on information from sensors monitoring engine coolant temperature, intake air temperature and volume as well as engine speed to adjust the above engine features in order to attain peak engine performance and efficiency. These include controlling fuel and air ratio using the throttle, control of ignition timing, variable valve timing, adjusting idle speed. Get your next NISSAN Caravan E24 Homy Original Wheel + Bridgestone BLIZZAK VL1 directly via Croooober Japan, the largest marketplace for used auto parts. ![]() The ECU uses pre programmed parameters, different sensors and other control modules such as the automatic transmission control module (TCM) to actuate certain features in the ignition and combustion system. Hello Hamidu, your Toyota, like most post-1990 vehicles, has an engine control unit (ECU) also called a computer. ![]()
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