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The electronic control system (PCM)
PCM automatic transmission is integrated with the engine control unit. PCM vehicle outputs a control signal to the motor and gearbox according to the signals of the sensors and / or switches. The control unit avtomatcheskoy transmission is responsible for the operation of the pump, control valve, solenoid valves, accumulators, clutches and brakes locking. The main pressure in the hydraulic system of an automatic transmission produced by the pump, it is regulated by the control system depending on the load and speed of the vehicle and provides the torque converter lock-up clutch and brakes. Switching valves controlled fluid flows, which arrive in the torque converter and planetary gearbox. The valve block has three solenoid valves that control the shift and torque converter lock.
| Fig. 3.74. Electronic control of Mazda 3: 1 - indicator lamp mode HOLD; 2 - speedometer; 3 - switch braking signal; 4 - the block of PCM; 5 - the switch HOLD; 6 - throttle position sensor; 7 - DLC; 8 - air flow sensor; 9 - the gauge engine coolant temperature; 10 - the gauge of speed of the car; 11 - Turbine speed sensor; 12 - crankshaft position sensor; 13 - control valve (with a temperature sensor and a transmission fluid solenoid valves); 14 - the switch of ranges of an automatic transmission; 15 - oil pressure sensor
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| Fig. 3.75. A block diagram of the control system of the car the Mazda 3: 1 - PCM; 2 - the engine management system; 3 - control system transmission in the block with the main transfer; 4 - on-board diagnostics system; 5 - input signals; 6 - throttle position sensor; 7 - crankshaft position sensor; 8 - air flow sensor; 9 - the switch of signals of braking; 10 - the gauge of the engine coolant temperature; 11 - the engine output control signals; 12 - connector link; 13 - the switch mode HOLD; 14 - Turbine speed sensor; 15 - the gauge of speed of the car; 16 - the gauge of temperature of the fluid transmission in the block with the main transfer; 17 - the switch of ranges of an automatic transmission; 18 - the gauge of pressure of oil; 19 - the outputs; 20 - solenoid switch A; 21 - solenoid switch B; 22 - solenoid switch C; 23 - solenoid switch D; 24 - solenoid switch E; 25 - the pressure control solenoid; 26 - speedometer signal; 27 - a control lamp HOLD mode
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