Family Cars Information

Automobile engine speed sensor quick and simple method of detection

 Function: Inductive speed sensor with pulse-plate matching for non-distributor ignition system to provide engine speed information and ending point information on the crankshaft.
    Principle: used in conjunction with the pulse disc. Pulse disk is a tooth plate, originally had 60 teeth, but there are two teeth vacancies. Pulse plate mounted on the crankshaft with the crankshaft rotation. When the tooth tip next to the sensor through the end, the pulse plate made of ferromagnetic materials, cutting sensor permanent magnet magnetic field lines, generated in the coil induced voltage, as the speed signal output.

    Sensor Pin Definition: 1 # 19 # Ground (shield);

    2 # 48 # grounding;

    3 # 49 # sensor signal output

    Simple measurement methods:

    1, the engine will not boot to connect the engine diagnostic equipment, in the running to start the motor speed when the view parameters are normal.

    2, (remove the connector) to digital multimeter reach Ohm file, two tables were then pen sensor 2 #, 3 # pin, 20 ℃ when the nominal resistance of 860Ω ± 10%.

    3, (connected to the connector) to reach the DC voltage digital multimeter files, two tables were then pen sensor 2 #, 3 # pin, start the engine, this time there should be voltage output. (Proposed car with an oscilloscope checking) car with an oscilloscope observation of the output voltage waveform to be observed, and the output waveform of the peak – peak value and frequency should be as the engine speed increases.

    4, using the specified vehicle diagnostic apparatus factory ECU and EFI systems to communicate, read ECU the fault data, allowing the sensor to judge the failure.