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Pressure sensor, particle trap (744)

Pressure sensor, particle trap (744)

Location

Pressure sensor, particle trap (744)

Main task

Measures the pressure across the exhaust system particle trap.

Type


Differential pressure sensor of piezo-resistive type with integrated signal converter giving a linear output voltage.

Technical data

Connection

Pin No. Signal type Description
1 Power supply Connected to ECM pin 44(B).
2 Ground Connected to ECM pin 37(B).
3 Signal Connected to ECM pin 36(B).



Function

The silicone diaphragm with the resistive sensor section is exposed to the pressures to be measured, one on each side. The resistance changes as the diaphragm bends and the signal is subsequently converted in an integrated amplifier. The output signal, which is compensated for temperature, is linear within the measuring range.