GODIAG GT101 PIRT DC 6-40V Vehicles Electrical System Diagnosis/ Fuel Injector Cleaning and Testing/ Current Detection/Relay Testing

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GODIAG GT101 PIRT is a multi-use circuit-tester with built-in diagnostic power. It is the best electrical tester for reducing diagnostic time in all 6- to 40-volt vehicle electrical systems. Undoubtedly it is the most versatile and practical tool ever for its users.

GODIAG GT101 PIRT DC 6-40V Vehicles Electrical System Diagnosis / Fuel Injector Cleaning and Testing / Current Detection/Relay Testing

GODIAG GT101 Mini Pirt Electric Circuit Tester is a multi-use circuit-tester with the diagnostic power from the car battery or the external battery. It is the best electrical tester for reducing diagnostic time in all 6- to 40-volt vehicle electrical systems. Undoubtedly it is the most versatile and practical tool ever for its users.    

Top 6 GT101 Hightlights:

1. Circuit breaker protected
2. Extremely easy to use and highly reliable
3. Instantly checks continuity of switches and relays.
4. Built-in Flashlight enables you to work in the dark
5. Instantly identifies positive, negative and open circuits
6. Simultaneously uses the hot lead and the ground lead to activate components right in your hand

Top 5 Reasons Why You Need GODIAG GT101 PIRT:

1. Moreover, its function also covers the detection of relays and fuel injectors as well as the cleaning of fuel injectors.
2. It can detect all 0-80v electronic systems, greatly shortening the detection time. The connection with the car battery is simple and easy
3. GODIAG PIRT  is a special circuit maintenance testing tool which is developed for automobile maintenance workers and engineers.
4. The output current can be reversed to form a loop power, and when the current exceeds 20A, it automatically trip to protect the device and extend the service life. to use.
5. It can be used to diagnose an open circuit, short circuit, detect positive and negative circuit and pulse current of power lines; and support the testing of lighting lamp,window lift motor, horn, ECU control Unit power supply and other individual component, vehicle component circuit.

GT101 Description:

GODIAG GT101 PIRT is a multi-use circuit-tester with built-in diagnostic power. It is the best electrical tester for reducing diagnostic time in all 6- to 40-volt vehicle electrical systems. Undoubtedly it is the most versatile and practical tool ever for its users.

This tool simplifies the testing of fuse boxes, verifies the correct operation of motors, lights, relays, sensors, wires, and communication circuits. The large digital color display makes for easy viewing in direct sunlight or complete darkness.

GODIAG GT101 PIRT Power Probe

Main Functions of GODIAG GT101 PIRT:

1.Circuit Troubleshooting Test (Short Circuit, Open Circuit)

When the vehicle's headlights, turn signals, lift windows, sunroofs and other functions fail, GT101 can be used to detect the circuit voltage or supply power for these components to find out whether it is a circuit problem or a component damage.

1) According to the circuit diagram, locate the fault point that may have the problem, and the GT101 electric tester can detect the positive and negative electricity.

2) Detect whether the circuit has normal positive or negative electricity.

3) Input positive voltage to the malfunctioning component (for example, headlight or motor). If the component works normally, it means that the circuit may be open. Otherwise, it means that the component is damaged.

GODIAG  GT101 PIRT Power Probe

2.Relay Test

When the car's headlights, turn signals, horn and the engine starter do not work, if there is no problem with these components after detection, you can check the relay switch.

After the relay is removed from the car, connect the adapter based on the connection of the relay.

Relay Test

3.Fuel Injector Test

When the vehicle has difficulty in starting, acceleration and fuel consumption, etc, it is necessary to check the fuel injector.

When detecting the fuel injector, if the fuel injector is driven to open or close, the ammeter shows the normal value and the fuel injector woks normally, it means that the fuel injector is normal. Otherwise, it means that the fuel injector is damaged.

Fuel Injector Test

4.Fuel Injector Cleaning

When the fuel injector is blocked, the fuel injection is not smooth. There are carbon deposits and thick sticky substance in the gap of the fuel injector. The designed fuel injection volume or atomization effect cannot be achieved, it needs to be cleaned.

1) Prepare a fuel injector cleaner pressurized can or a carburetor cleaner pressurized can(nozzle diameter of the pressurized cans: 4mm)
2) Hold the manual cleaning tool tightly with your hand, and firmly fix the fuel injector with your fingers to prevent the pressure of the cleaner can from washing away the the fuel injector.
3) Pay attention to the hazards of liquid to human body during manual cleaning, and take protective measures. Do not operate in dangerous places with open flames because the pressurized cans are extremely flammable. Choose an open place to facilitate the discharge of cleaning liquid.)

Fuel injector cleaning

5. Used with the Wire Piercing Probe

1) First, turn the red knob and pull down the spring clip to an appropriate position, so that the spring clip can clamp the line under test.
2) Screw the red knob again to make sure the probe and the line under test are in good contact.
3) Insert the banana plug cable at the end of it (GT103 does not have a voltage and current display, and you can read the voltage of the line under test with a multimeter)
4) Plug the other end of banana plug cable into the GT101(also can be used with GT102 or GT103)


Key Features of GODIAG GT101 PIRT:

1. Easy-to-read volt-ammeter allows you to read voltage and current at your fingertips.
2. Tests for bad ground contacts instantly, allowing you to follow and locate shorts fast without wasting fuses
3. Audio tone indicator allows for no-look menu scrolling once users are familiar with menu tone assignment
4. 20ft (can be extended via extendable cable port) cable provides excellent accessibility to test along the vehicle
5. Used for DC 6-40v cars, motorcycles, trucks, buses, engineering vehicles, vessels, tractors, mining vehicles and other vehicles that use DC circuits.
6. Performs every type of service including power injection, measurement, ground testing, polarity checks, continuity testing and components activation
7. With a flip of the output switch, you have positive and negative electricity via the probe for powering up electrical components like cooling fans, relays, etc.

GODIAG GT101 PIRT Power Probe

GoDiag GT101 vs GoDiag GT102 vs TOPDIAG P200 vs AUTEL PS100

Product Functions/Names

GoDiag GT101

GoDiag GT102



Product Picture

GoDiag GT101

GoDiag GT102



DC voltage

AC voltage



Positive and negative voltage output

Component activation






Open circuit detection

Short circuit detection

Fuel injector test


Fuel injector cleaning



Relay test


Oscilloscope function








DC Power

DC Car battery power(Suitable for 6-40v)

Power Consumption


Operating Temperature

-5 to 50 degrees Celsius

Storage Temperature

-5 to 60 degrees Celsius

The Box Size


The Main Unit Size




Wire Length


Shell Material

ABS Environment-Friendly Materials

Package Includes:

1pc x Main Unit of GODIAG GT101 PIRT
1pc x Clip to Connect Battery
1pc x Probe
1pc x Probe Cap
1pc x Fuel Injector Test Lead
1pc x 10mm Fuel Injector Cleaning Connector
1pc x 12mm Fuel Injector Cleaning Connector
1pc x Simple Relay Test Adapter
5pcs Simple Relay Connection Leads
1pc x English Manual

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Unboxing GODIAG GT101 PIRT DC 6 40V & Functions Display