PM SENSOR [SKYACTIV-D 1.8]
id0140s1011200
Purpose, Function
• The PM sensor detects PM which could not be collected by the DPF, and inputs the current to the PCM via a CAN signal.
Construction
• The gas detection area (probe) of the PM sensor is installed to the rear of the ammonia slip catalyst.
• The PM sensor (control unit) of the PM sensor is secured to the bracket under the floor.
• The PM sensor (control unit) is integrated with the probe and therefore cannot be disconnected.
• A zirconia element + platinum has been adopted for the detection part of the PM sensor.
Operation
• The current changes by absorbing soot into the sensor element surface and the PM sensor detects the soot amount.
After engine start and before start of measurement:
• It operates the heater at low temperature and waits (Because damage may occur if element contacts water)
Before measurement start
• It operates the heater and burns the soot on the sensor element surface to detect soot.
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Note
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• It starts to measure when a measurement signal is input by the PCM.
During measurement:
• It does not operate the heater during measurement, but after the measurement is completed, it operates it at low temperature again.
