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An electronic control unit (ECU), also known as an electronic control module (ECM), is an embedded system in automotive electronics that controls one or more of the electrical systems or subsystems in a car or other motor vehicle.
DSC: Dynamic stability control; DVVL: Discrete variable valve lift; DVVLd: Discrete variable valve lift, includes dual cam phasing; DVVLi: Discrete variable valve lift, includes intake valve cam phasing; eACC: Improved electric accessories; EAT: Electronically assisted turbocharging; EFI: Electronic Fuel Injection; EGR: Exhaust gas recirculation
A power-train control module, abbreviated PCM, is an automotive component, a control unit, used on motor vehicles. It is generally a combined controller consisting of the engine control unit (ECU) and the transmission control unit (TCU). On some cars, such as many Chryslers, there are multiple computers: the PCM, the TCU, and the Body Control ...
Also gas pedal. A throttle in the form of a foot-operated pedal, or sometimes a hand-operated lever or paddle, by which the flow of fuel to the engine (and thereby the engine speed) is controlled, with depression of the pedal causing the vehicle to accelerate. admission stroke See induction stroke. aftermarket air brake 1. A type of brake in which the force that actuates the brake mechanism is ...
While controlled or partially controlled by the Powertrain Control Module (PCM), third gear is used as a failsafe gear and default operating gear during unexpected conditions. Without computer control, the transmission will automatically hydraulically shift from first gear into second gear based on input shaft RPM.
starter control 50 Battery 15 battery+ through ignition switch 16, 54/15 30 from battery+ direct 30/51 30a from 2nd battery and 12/24 V relay: 31 return to battery- or direct to ground 31a return to battery- 12/24 V relay 31b return to battery- or ground through switch 85d 31c return to battery- 12/24 V relay 31, 31a Electric motors; 32 return ...
The four-pin module was used on carbureted engines and uses conventional mechanical timing controls (vacuum and centrifugal advance mechanisms). [citation needed] The five-pin module was introduced in 1978 and was an early attempt at electronic timing control; it contains a provision for connecting a knock sensor.
The earliest electronic systems available as factory installations were vacuum tube car radios, starting in the early 1930s.The development of semiconductors after World War II greatly expanded the use of electronics in automobiles, with solid-state diodes making the automotive alternator the standard after about 1960, and the first transistorized ignition systems appearing in 1963.