Cheap ($21)but only by detecting the voltage to determine whether the vehicle electrical circuit is a short circuit or a broken circuit. Very low efficiency and cannot detect component problems.
Cheap ($79) and it can test for continuity, diagnose circuit failures, check the good and bad ground, activate some components on and off the vehicle, capture MIN/MAX voltage, etc. But you need to buy an additional oscilloscope if you need to check and confirm the fault caused by the car circuit sensor, for example: M.A.P. sensor circuit fault. And the KM10 mainly relies on the fuse to prevent overload or short circuit, so it is easy to damage. If you need to use it often, we do not recommend. By the way, it only support English language.
DC Voltmeter: capable of applying battery supplied voltage or ground. AC voltmeter: TRMS, Peak-to-Peak/MIN/MAX, Frequency, Duty Cycle. Trace mode offers scope-like functionality. Resistance testing with a live or unloaded circuit. Fuel-injector test mode. Driver test for testing Module drivers. Self-resetting circuit-breaker. With oscilloscope function, circuit breaker and fuse double protection. But it is too expensive ($305) and complicated to use for inexperienced people. And it also only has English version
of research and development
Tens of thousands
of real vehicle tests
of short circuit tests
Moderate price, intelligent judge and switch the VDC/OHM/AMP test, 0-5V safe and efficiently ECU wires connection testing, multi-language support, online update support, easy to use.
Power supply reverse protection
Built-in overload protection
25A circuit breaker
The main test functions: voltage test, resistance test, positive/ negative test (display as VDC, OHM, AMP). It is mainly used for quick test without switching between different test modes.
Automatically recognize the measured signal and display values of voltage or OHMs.
Digital display intelligent multimeter meets all functions of vehicle multimeter (VDC, OHM, DIO, APM, HZ). It can continuously test circuits or components of vehicle circuit system.
Support sampling time interval setting.
Support voltage test range: 1V~49V.
“START/STOP" (press “OK" to start or stop waveform refresh).
“DIV" voltage per grid (test range 1V-49V), press "UP" and “DOWN" keys to adjust the voltage value.
It shows 2 types of common automotive relay diagrams on the screen (5-terminal relay and 4-terminal relay).
Connecting the relay test line to the relay terminal can quickly detect whether the relay is normal.
It has 4 pulse signal modes, which can be connected to the injector by outputting different pulse signals to test the injector.
The Probe outputs different pulse signals to the injector and checks the spraying status of the injector. This function can help diagnose injector conditions. It can be used with any fuel pressure tester.
Use the Probe Tip to find the positive/negative wire of the power supply.
Through the identification of the probe, the positive interface voltage or negative grounding icon will be displayed on the screen.
SIGMAPROBE has 3 activation modes: MOMENT (moment activation), LATCH (lock activation), PULSE (pulse activation).
The component activation function is used to generate activation signals to test components, such as activating lights, motors, horns and other on-board power supply equipment.
(Note: Can not be used for ECU, sensor module casually, there is a risk of burning)
Simulate the voltage output by the sensor to verify the wiring to the ECU. Sigmaprobe supports a power supply voltage of 0-5V.
Note: 0-5V power supply mode designed as an active mode, but its function is different from the component activation mode. It can adjust the voltage output under 5V and limit the current to 100mA.
Connect SigmaProbe main unit to alligator power connector
Alligator clips connect to Positive & Negative of the battery
5 keys operating to choose the test function for working
Connect Probe to circuit, relay, injector anywhere you need check to start electronic diagnose
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