Talking about the Testing Function of Digital Multimeter

Digital multimeters are a common portable testing tool that makes digital multimeters a very effective tool for diagnosing electrical and electronic system failures, even for highly electronic Hyundai vehicles.

The most commonly used function of the DMM is to measure the resistance during system troubleshooting. Under certain operating conditions, many system components, such as sensors, actuators and so on, have specified resistance values. By measuring the resistance between the corresponding terminals of each component, it is possible to determine whether there is a fault in the components. Can also use the resistance of the multimeter file, measuring electrical switches in different stalls when the corresponding terminals on-off situation, to determine the working status of the switch is normal; the use of multimeter resistance file to the connector on both sides of the same jack The resistance is measured to determine whether the contact of the connector is reliable or not; the resistance of the multimeter is used to measure the resistance between the two ends of the contact under the condition that the contact of the relay is closed, so as to judge whether the contact of the relay is ablated or dirty ; The use of multimeter resistance file on the diode and other electronic components on-off check to determine the appropriate electronic components are normal; the use of multimeter resistance file, the system components of the relevant terminals and ground resistance between measurements to To determine whether the parts of the ground situation is normal.

Another common function of digital multimeter is to measure the voltage, voltage by measuring the way, check the car circuit and system components working conditions are normal. For example, under certain operating conditions, the voltage between the terminals of the automotive computer control module connector and the ground terminal can be detected to determine whether the electrical circuit related to the control module and the control module itself are normal.

Under certain conditions, by measuring the voltage between the sensor signal terminals and ground terminals, to determine whether the sensor is normal; actuator can not work, through the actuator input and output (or ground) terminal voltage measurement, Determine the actuator-related electrical circuits and actuators itself is normal and so on.

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