Hydraulic control system

Make

Fiat

Model

Punto (176) Factory Service Manual

Year

1993–1999

Section

Automatic transmission (Selecta) › Hydraulic control system

21 Gearbox and differentialHydraulic control system · page 1 of 4

HYDRAULIC CONTROL SYSTEM

The hydraulic control system consists of a motor driven pump and hydraulic pressure regulation valve which serve to change the ratio.

The system receives several input signals; the speed of the input shaft, the position of the accelerator pedal and the pulley ratio. These signals determine the control strategy.

Hydraulic control system

3. Injection/ignition control unit	17. Input shaft RPM
4. Air conditioner sensor signal	18. Primary oil pressure
6. Water temperature signal	19. Primary pulley
7. Clutch signal	20. Electromagnetic clutch
8. Engine RPM signal	21. Pressure regulating solenoid valve
9. ECVT warning light	22. Oil pressure control valve
10. Selector lever position	23. Secondary oil pressure
11. Accelerator pedal switch/throttle valve potentiometer/Torque signal	24. Slip ring
12. Brake switch	25. From engine
13. ECVT control unit	26. Oil pump
14. Signal from vehicle speed sensor	27. Vehicle speed sensor
15. Accelerator pedal position switch	28. Secondary pulley
16. Pulley ratio	29. Belt and pulley
	30. To halfshafts

04 Transmission