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Fuel pressure sensor, fuel rail (653), E39

Fuel pressure sensor, fuel rail (653), E39

Location

Mounted on short side of fuel rail toward belt circuit side

Fuel pressure sensor, fuel rail (653), E39 .

Main task

Measures fuel pressure inside the fuel rail.

Type


Pressure sensor with integrated signal converter.

Connection

653 pin no. Signal type Description
1 Power supply, 5 V Connected to ECM pin 3(B).
2 Signal Connected to ECM pin 19(B).
3 Ground Connected to ECM pin 18(B).



Function

The sensor element comprises a resistance bridge in thin-film technology mounted on a steel diaphragm. When pressure is exerted to the diaphragm it will bend, creating a voltage across the resistance bridge. This voltage is then converted in an integrated signal converter and is connected to ECM, control module, E39 (590).

When the fuel pressure is high, the output signal voltage is high. When the fuel pressure is low, the output signal voltage is low.