ENGINE 1.3L QUADRAJET (90PS) 114 1. Auxiliary electric fuel pump 2. Lambda sensor 3. VGT solenoid valve (for 90 CV version only) 4. Air conditioning compressor (where fitted) 5. E.G.R. solenoid valve 6. Rev counter 7. Cooling fan 8. Heater plugs control unit 9. Twin track accelerator pedal potentiometer 10. Brake pedal switch 11. Clutch pedal switch 12. Fuel temperature sensor 13. Fuel pressure sensor 14. Flow meter 15. Coolant temperature sensor 16. Water in diesel filter sensor 17. Cruise control (where fitted) 18. Pressure relief and air temperature sensor 19. Timing sensor 20. Engine rpm sensor 21. Speedometer 22. Battery 23. Fiat CODE (body computer) 24. Diagnostic socket 25. Fuel pressure regulator on rail 26. Injectors 27. Heater plugs 28. Pressure regulator on the pump (for 90 CV version only) 29. Heater plugs warning light 30. Injection warning light 31. Coolant overheating warning light 32. Water in the fuel filter warning light 33. OIL warning light B. SELF-DIAGNOSIS The control unit self-diagnostic system checks the signals coming from the sensors comparing them with the permitted limits. C. SIGNALLING OF FAULTS DURING STARTING: Q Warning light on until engine started indicates test stage; Q Warning light off after engine starting indicates no fault with components that affect the safety of the system; Q Warning light on with engine running indicates fault. D.SIGNALLINGOF FAULTS DURINGOPERATION Q Warning light on indicates fault; Q Warning l ight off indicates no faul t wi th components that affect the safety of the system; E. RECOVERY From time to time the control unit defines the type of recovery according to the components that are faulty. The recovery parameters are managed by components that are not faulty. F. CODE RECOGNITION The moment the control unit receives the ignition ON signal it converses with the body computer via the CODE function to obtain the go ahead for starting. G. FUEL TEMPERATURE CONTROL With the temperature of the fuel at 80 °C measured by the sensor in the diesel filter, the control unit operates the pressure regulator to reduce the line pressure and, if this is not enough, to also reduce the amount of fuel injected. H. ENGINE COOLANT TEMPERATURE CONTROL When the engine coolant temperature is above 105 °C, the control unit : Q reduces injected fuel quantity (reduces engine power); Q controls the cooling fan Q switches on the coolant temperature warning light.
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