China Aerospace Telecommunications Ltd
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Methods of locating door pin switch
The door pin switch input is the ground based on which the main unit
judges the states of the vehicle door, and it is located in the wiring harness
inside the right front door. There are high-level and low-level detections of
vehicle door pin switch.
！WARNING: The door pin switch detecting wire of MPIP-618W main unit
supports low-level detection only. If the vehicle adopts high-level detection,
the negative signals must be converted into positive signals through external
relay
The high-level detection mechanism is: When the vehicle door is closed,
the voltage of door pin switch is low-level. When the vehicle door is open, the
voltage of door pin switch turns into high-level, and the main unit judges that
the door is opened;
The low-level detection mechanism is: When the vehicle door is closed,
the voltage of door pin switch is high-level. When the vehicle door is open,
the voltage of door pin switch turns into low-level, and the main unit judges
that the door is opened;
Method of locating: most door pin switches are negative triggering.
Connect one end of the test probe with the positive electricity and the other
end put on the wire, and the LED indicator of test probe will go off when the