Differential Pressure Sensor; Outline Of Differential Pressure Sensor; Structure Of Differential Pressure Sensor; Function Of Differential Pressure Sensor - wsm 03-CR-E4 Workshop Manual

MECHANISM
9. Aftertreatment system

9.12 Differential pressure sensor

9.12.1 Outline of differential pressure
sensor
The differential pressure sensor detects the pressure
difference between the inlet and outlet of the DPF.
9.12.2 Structure of differential pressure
sensor
The differential pressure sensor is made up of strain
gauge (piezoresistive element) and diaphragm and the
like.
(1) DPF inlet pressure (high
pressure port)
Circuit diagram
(3) Differential pressure sensor
(4) ASIC
(A) Terminal A-VCC12
9.12.3 Function of differential pressure
sensor
The differential pressure sensor measures the pressure
difference between the inlet and outlet of the DPF and
sends this information to the engine ECU.
The engine ECU calculates the amount of PM
accumulated in the DPF based on the differential
pressure sensor information.
03-CR-E4,03-CR-TE4BG
(2) DPF outlet pressure (low
pressure port)
(B) Terminal A-GND11
(C) Terminal DPS
The differential pressure sensor has an internal silicon
diaphragm and the output
diaphragm displacement due to pressure differences.
9.12.4 Specification of differential pressure
sensor
Supply voltage
Output resistance
Output characteristics
(1) Output (%Vdd)
4. ENGINE
changes based on
5.0 V
5 kΩ
(2) Differential pressure (kPaD)
4-83
KiSC issued 02, 2021 A