GODIAG GT101 PIRT Power Circuit Probe DC 6–40V Vehicle Electrical Diagnostic Tool for Fuel Injector Cleaning & Testing

GODIAG GT101 PIRT Power Circuit Probe Highlights

1. The GODIAG GT101 PIRT Power Probe is a professional circuit testing tool designed for automotive technicians and engineers.
2. It can diagnose open circuits and short circuits, detect positive and negative polarity, identify pulse signals, and test power circuits. It also supports testing of lighting systems, window motors, horns, ECU power supplies, and other vehicle electrical components.
3. Additional functions include relay testing, fuel injector testing, and fuel injector cleaning.
4. The output current can be reversed to create a loop power supply. When the current exceeds 20A, the device automatically trips to protect the unit and extend its service life.
5. Supports testing of DC 0–80V electronic systems, helping reduce diagnostic time. Connects directly to the vehicle battery for simple and convenient operation.

Description

The GODIAG GT101 PIRT Power Probe is a versatile circuit tester powered by a vehicle battery or an external power source. It is an ideal electrical diagnostic tool for 6V–40V vehicle electrical systems, helping technicians quickly identify and troubleshoot electrical faults.

This tool simplifies the testing of fuse boxes and verifies the operation of motors, lights, relays, sensors, wiring, and communication circuits. The large full-color digital display ensures clear visibility in both bright sunlight and low-light conditions.

GODIAG GT101 PIRT Power Circuit Probe Functions

1. Circuit Troubleshooting (Open Circuit & Short Circuit Detection)

When vehicle functions such as headlights, turn signals, power windows, or sunroofs fail, the GT101 can be used to measure circuit voltage or supply power directly to components, helping determine whether the fault is caused by wiring or component failure.

1. Using the wiring diagram, locate the suspected fault point. The GT101 can identify both positive and negative polarity.
2. Check whether the circuit has a normal positive or ground connection.
3. Apply voltage directly to the faulty component (such as a headlight or motor). If the component operates normally, the circuit may have an open fault. If it does not operate, the component itself may be defective.

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.

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.

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.)

GODIAG GT101 PIRT Power Circuit Probe Features

• Supports comprehensive services including power injection, voltage and current measurement, ground testing, polarity checks, continuity testing, and component activation.
• Easy-to-read volt-ammeter provides instant voltage and current readings.
• Flip the output switch to deliver positive or negative power via the probe, powering components like cooling fans, relays, and more.
• Simultaneously use the hot and ground leads to activate components directly in your hand.
• Quickly identifies positive, negative, and open circuits.
• Instantly tests for bad ground contacts to locate shorts without wasting fuses.
• Checks switches and relays continuity in seconds.
• Circuit breaker protection ensures device safety.
• Built-in flashlight allows working in dark or low-light conditions.
• Audio tone indicator enables hands-free menu navigation once familiar with tone signals.
• Includes a 20ft cable (extendable via cable port) for excellent reach around vehicles.
• Extremely easy to use and highly reliable.
• Compatible with DC 6–40V vehicles, including cars, motorcycles, trucks, buses, construction vehicles, boats, tractors, and mining vehicles.

Comparison Table GODIAG GT101, JDIAG P200 and Autel PS100:
 

Product Functions/Names	GODIAG GT101	GODIAG GT102	JDIAG P200	AUTEL PS100
Product Picture
DC voltage	√	√	√	√
AC voltage	X	X	√	√
Positive and negative voltage output	√	√	√	√
Component activation	√	√	√	√
Current	√	X	√	√
Resistance	X	X	√	√
Open circuit detection	√	√	√	√
Short circuit detection	√	√	√	√
Fuel injector test	√	√	√	X
Fuel injector cleaning	√	√	X	X
Relay test	√	√	√	X
Oscilloscope function	X	X	√	X
Flashlight	√	√	√	√

Product Parameters 
                         

Package Includes:
 
1pc x Main Unit of GODIAG GT101 PIRT Power Probe
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