This device will allow you to check the status of both passive and active speed sensors. In addition, there is an option to simulate signals from these types of sensors to check the behaviour directly in the control unit to which the sensors would be connected.
In case of failure or malfunction, with SST (Speed Sensor Tester) it could be detected quickly if the damaged component is the speed sensor or on the contrary it is the control unit that does not process the signal in a correct way and to part, know if the problem is electrical power supply, short circuit or open circuit, thus avoiding other more laborious and complex tests.
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[Option 1 then Option 2]