199002570 - INTRODUCTION - DIESEL INJECTION PRESSURE PUMP ELECTRONIC CONTROL
DESCRIPTION OF COMPONENTS
Injection control unit (common rail mjd 6f3 magneti marelli)
It is located in the engine compartment.The control unit the flash EPROM type, i.e. it can be reprogrammed from the outside without affecting the hardware.The injection control unit integrates the absolute pressure sensor.PIN OUT
Rpm sensor
SpecificationsThis is fitted on the crankcase and faces the phonic wheel on the flywheel.It is inductive type, i.e. its operation is determined by magnetic field changes generated by the teeth passing in front of the phonic wheel (60-2 teeth).The injection control unit uses the rpm signal for:- determining the engine speed of rotation- determining the angular crankshaft position
| Pin | Description | Signal type |
|---|---|---|
| 1 | Flywheel signal (A) | Frequency output |
| 2 | Flywheel signal (B) | Frequency output |
Cam angle sensor
SpecificationsThis Hall effect sensor is fitted on the camshaft housing facing the camshafts.A tooth on the pulley allows the timing sensor to indicate engine timing position.The injection control unit uses the timing sensor signal to recognize T.D.C. at the end of the compression and during starting to synchronize the engine management control unit with the engine.The sensor is fitted by the exhaust side camshaft.
| Pin | Description | Signal type |
|---|---|---|
| 1 | Earth | Earth |
| 2 | Timing signal | Frequency output |
| 3 | Power supply | 12 V input |
Pressure relief sensor - for the 75 cv version
SpecificationsThe supercharging pressure sensor is fitted on the intake manifold and allows intake pressures up to 1.5 bar to be measured (corresponding to 2.5 bar absolute).The sensitive element comprises a piezoresistive element whose signal is amplified by an electronic circuit built into the sensor. The sensor receives a direct 5 V supply from the electronic control unit and provides an output voltage directly proportional to the supercharging pressure.
| Pin | Description | Signal type |
|---|---|---|
| 1 | Power supply | 5 V input |
| 2 | Earth | Earth |
| 3 | Sensor output | Analogue output |
Pressure relief and air temperature sensor - for the 90 cv version
It is fitted on the air intake manifold and the signal sent to the engine management control unit makes it possible to:- regulate the turbocharger pressure;- protect the engine against overheating;- diagnose the operation of the air flow meter.
| Pin | Description | Signal type |
|---|---|---|
| 1 | Earth | Earth |
| 2 | Air temperature sensor output | Analogue output |
| 3 | Power supply | +5 V input |
| 4 | Pressure sensor output | Analogue output |
| Temperature in °C | Resistance R in Ohm | ||
|---|---|---|---|
| Minimum | Average | Maximum | |
| - 40 | 45301 | 48153 | 51006 |
| - 35 | 33703 | 35763 | 37823 |
| - 30 | 25350 | 26854 | 28359 |
| - 25 | 19265 | 20376 | 21487 |
| - 20 | 14785 | 15614 | 16443 |
| -15 | 11453 | 12078 | 12702 |
| - 10 | 8951 | 9426 | 9901 |
| - 5 | 7055 | 7419 | 7783 |
| 0 | 5605 | 5887 | 6168 |
| 5 | 4487 | 4707 | 4926 |
| 10 | 3618.7 | 3791.1 | 3963.5 |
| 15 | 2938.5 | 3074.9 | 3211.3 |
| 20 | 2401.9 | 2510.6 | 2619.3 |
| 25 | 1975.8 | 2062.9 | 2150.1 |
| 30 | 1644.7 | 1715.4 | 1786.2 |
| 35 | 1374.2 | 1431.8 | 1489.5 |
| 40 | 1152.4 | 1199.6 | 1246.7 |
| 45 | 969.9 | 1008.6 | 1047.4 |
| 50 | 819.1 | 851.1 | 883.0 |
| 55 | 694.2 | 720.7 | 747.1 |
| 60 | 590.3 | 612.3 | 634.2 |
| 65 | 503.6 | 521.9 | 540.2 |
| 70 | |||
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