What circuit problems can Sigmaprobe solve?

What circuit problems can Sigmaprobe solve?

Sigmaprobe circuit tester is an intelligent circuit tool. In the current trend of more and more smart vehicles and more and more complex electronic systems, auto repair practitioners are increasingly relying on automotive diagnostic equipment and testing tools, and all electronic systems are inseparable from the circuit, but at present, we’re focusing on how to solve the problem of vehicle circuit failure? What methods and tools you can use to solve the problem? Is the solution efficiency slow or fast?

the problem of vehicle circuit failure

General circuit detection methods

For example, I need to repair a car that may have circuit problems. The process is as follow:

1. Through the description of the car owner to find out the problems , and then look through the eyes, touch with the hands, and listen with the ears. Know the problems based on the experience, then use alternative maintenance methods.

touch with the hands to find out the problems

 2. Know the problems through the owner’s description, then use the relevant methods and testing equipment to locate the fault. Different testing equipment will be used during responding different problems. First of all, we need to use a multimeter for voltage detection, resistance continuity testing, open circuit, short circuit testing.
Oscilloscope current testing, and more complicated relay testing, injector testing, and other component testing equipment. It require the maintenance personnel is proficient in light testing, multimeter, oscilloscope, component activation, sensor testing and other different equipment.

Use the tool to test the circuit


SIGMAPROBE Intelligent Circuit Tester

Aiming at "solving the problem of vehicle circuit efficiently" as the starting point. Sigmaprobe circuit tester is specially used for vehicle smart circuit testing, which made Sigmaprobe to be launched in the market. It has eight functions, which can test the status of all lines, components and electronic control system of the vehicle.

SIGMAPROBE Intelligent Circuit Tester

Smart Test

Smart test is mainly used for knowing the voltage and resistance; automatic switching of testing mode; and quick judgment of line path; short circuit and open circuit.

Smart Test


Multimeter mode

Multimeter mode. High resistance LCD automobile multimeter, mainly used for VDC (Direct Current voltage); OHM (electrical resistance); DIO (diode / on-off test); AMP (current); Hz (frequency) test. It is mainly used to detect DC current intensity, DC voltage, wire resistance and other parameters. But you can also use it to test duty cycle, frequency, capacitance, inductance, semiconductor components, etc.

Multimeter mode


Oscilloscope Mode

Oscilloscope mode. You can use it to measure the waveform and period of AC signal. It mainly display the voltage waveform of input and output signals in the automotive electrical control system. It can display instantaneous waveform, which is an important function in automotive electrical fault diagnosis.

Oscilloscope mode


Relay Test

Relay test, through the connection of wiring and relay, quickly know the relay status.

Injector Test

Injector test, Sigmaprobe has four pulse signal modes. Different pulse signals are output by selecting the mode, and then connected the output signal to the injector. According to the receiving status of the injector, you can teste and observe the status of the injector (good or bad).

Injector test


Positive and Negative Test

Positive and Negative test. The positive voltage can be automatically identified and displayed through the probe contact, and the negative resistance icon is on the screen.

Positive / Negative test


Component Activation

Component activation is mainly used to generate activation signals to the tested components. It has three activation modes: MOMENT, (momentary activation), LATCH (lock activation) and PULSE (pulse activation). (For example, activating vehicle lights motors and other onboard power supply equipment. Don't use it for ECU and sensor module casually. There is a risk of burnout.) The activation of Sigmaprobe has an overload current setting, which is used to set the cut-off current from 1a to 18a. If the current is greater than the set target value during the activation process, Sigmaprobe will cut off the power supply and stop activation.

Component activation


0-5V Power Supply

0-5V power supply. Sigmaprobe is very useful in checking the wiring of ECU. Because ECU can only bear the power supply voltage within 5V. If there is still a problem after you check the sensor with the multimeter mode, you can use the 0-5V mode. Sigmaprobe can select the 0-5V supply voltage (current < 100mA) in 0.5V increments. Simulate the output voltage of the sensor to verify the wiring to ECU. There is a set point voltage alarm, which to prevent the circuit connected to the probe tip from forcing the voltage to be 0.1V higher or lower than the set point voltage. The device will sound an alarm to tell you that there is a difference between the output voltage and the set voltage. You can disconnect and check the circuit for short circuit or other faults.

System Settings

System settings, key operation sound, adjustable screen display background.

Other Features


Network Upgrade

Sigmaprobe built-in STM chip, built-in 14 language packs, users can set the language freely. At present, the operation program is continually upgrading and language continually adding. Users can download the upgrade package on the Sigmaprobe official website, connect the host to the computer through a USB cable, and can run the upgrade program on their computer to upgrade.

Network upgrade


After Owning Sigmaprobe

A set of Sigmaprobe can meet all circuit and component testing requirements of the vehicle. The testing time is more efficient, the information is more accurate, and the cost is lower. Now, Sigmaprobe has started pre-sale program. People who are engaged in automotive circuit maintenance and all those who are interested in Sigmaprobe are welcome to enter our website for more in-depth understanding.