GODIAG GT100 Plus GPT Auto Tool – OBDII Breakout Box with DOIP-ENET & ECU Read/Write Support

The GODIAG GT100 PLUS GPT is a professional testing and diagnostic platform designed for OBDII protocol communication detection, ECU maintenance, diagnosis, programming, and coding.

Equipped with a real-time voltage and current display, it allows maintenance engineers to easily monitor and assess the ECU’s operating status.

This tool converts a vehicle’s OBD2 interface into a standard 16-pin connector, enabling signal detection and connection to either single or multiple vehicle modules. It can also link with various diagnostic tools to verify the integrity of vehicle communication systems.

The GT100 PLUS GPT supports 24V to 12V voltage conversion, DOIP-ENET communication, and GPT protocol for reliable ECU data reading and writing.

Additionally, it can supply power during battery replacement, preventing issues such as data loss in the vehicle’s control module, automatic locking, remote key failure, or fault light activation.

Built with shielded twisted CANH and CANL cables, the unit ensures enhanced resistance to electromagnetic interference, resulting in more stable and reliable communication.

Product Functions

1. ECU Read/Write via GPT Protocol
   
   

• Supports GPT protocol for ECU data reading and writing without disassembling the unit.
• Fully compatible with tools such as PCMflash and KESSV2.
• Supports OBD2 BENCH communication via CAN bus and K-Line.
• Includes GPT BOOT CNF1 support for stable data operations.

2. OBDII Communication Status & Voltage Monitoring
   

• Allows real-time monitoring of the vehicle’s OBDII diagnostic communication.
• The LED indicators show whether proper communication exists between the diagnostic tool and the vehicle.
• Continuously displays live OBDII voltage; if voltage drops below 11V, users are advised to stop diagnosis or programming to prevent data loss, ECU locking, or startup issues.
• Supports full OBD2 BENCH protocols, ensuring broad compatibility across vehicles and diagnostic systems.

3. DOIP-ENET Diagnostics Support
   
   
   • Fully supports DOIP-ENET communication for advanced diagnostic, programming, and coding tasks.
   • Compatible with BMW, Mercedes-Benz, Volkswagen, Audi, and other vehicles utilizing the DOIP protocol. (Software not included.)
   • Also applicable for Land Rover, Volvo, and Geely vehicles supporting DOIP communication. (Software not included.)

4. 24V to 12V Voltage Conversion
   
   
   • Converts 24V diagnostic interface voltage from heavy trucks, light trucks, and pickups to 12V, suitable for standard diagnostic equipment.
   • Protects diagnostic tools from over-voltage damage while ensuring accurate power delivery.

5. Diagnostic Tool Communication Check
   
   • Can be used to test whether diagnostic, programming, or coding tools are transmitting communication signals properly.
   • Helps quickly identify interface or cable issues before performing ECU operations.
6. ECU connection: single module connection
   
   
   • GODIAG GT100 PLUS GPT, connected to a single ECU module, is convenient for a user to do the single-module diagnosis and programming.

7. GT100 PLUS GPT program key for VW, Porsche, Mitsubishi etc with all keys lost - activate the instrument or immobilizer module.
   To program VW 4th generation / 5th generation Lost all keys (for example: new A6L Touareg A4 Q5 A7), please use GT100 PLUS GPT to short-circuit banana connector PIN 16----PIN 1 to lit up the dashboard, aft that use the key programmer tool to connect with the female adapter of GT100 PLUS GPT+ for data collection. Some vehicle dashboards won't be lit up, but data can also be collected, for example: A6L Q7.
   To replace the engine ECU of Toyota or to use some key programmer to program Toyota when all keys lost, it needs to short-circuit PIN13-PIN4
   To program Mitsubishi key with all keys lost or to set OBDII when all remote key lost, please short-circuit PIN1-PIN4.|
   To program Porsche Cayenne key with all keys lost or with all remote key lost, please short circuit PIN3-PIN7.

8. GT100 PLUS GPT Pin 1, 9, 3, 11 12, 13, 8[corresponding to the yellow banana connector on the machine], these non-standard obd2 protocol interface may display CAN BUS or K-Line communication protocol. GT100 PLUS GPT can only display K- Line Pwm Vpw+ KWP 2000 protocol. GT100 PLUS GPT will display CANBUS K-Line Pwm Vpw+ KWP 2000 protocol communication. 

9. Quickly communicate with a single ECU on bench by connecting with the ECU diagnostic / programming tool. [Which allow the engineers or technicians to complete the job on bench, also keep away the risk of data loss in other modules when directly testing on the vehicle.

10. Multiple vehicle ECU module connecting. [It’s aimed at solving the problem of engineers and technicians who need to connect multiple ECU during programming a module, such as connecting to multiple ECU modules for key programming.

11. Replace the auxiliary power supply for the battery - uninterruptible power supply connecting mode. [Since there’s failure or missing antitheft remote control data of some vehicles when the battery is dismantled, the auxiliary power supply aims at supplying power to the vehicle through GT100 PLUS GPT before replacing the battery to sustain the power supply to the vehicle. It guarantees the vehicle ECU is power connected during replacement of the battery.

12. The OBD2 cable of GT100 PLUS GPT is as long as 1.4 meters, which will solve the problem that the diagnostic tool cable is not long enough or the vehicle diagnostic port is too narrow to connect. Please connect GT100 PLUS GPT first, turn on the power switch and you will see the voltage on the screen which can tell whether the power supply of the vehicle is normal. [Which keep away the risk of burning out the diagnostic & programming tool due to the modified vehicle OBD2 port.

13. For old OBD1 vehicles or special diagnostic port, please connect GT100 PLUS GPT through the banana plug and DB25 jumper. The OBD1 diagnostic port or special diagnostic port can be transferred to the standard OBD2 diagnostic port.

14. GT100 PLUS GPT will convert the OBD1 port of special truck to the standard OBD2 diagnostic port according to the protocol.

15. Work with CAS1/CAS2 Mech-Key Test Platform

16. Work with CAS2 CAS3 SER Semi Smart Test Platform

17. For BMW-CAS4/CAS4+Programming Test Platform, it’s used to test whether the programmed key works with CAS4 normally
18. For BMW FEM/BDC Programming Test Platform
19. More connectors and dedicated modules are under development, please wait...

Package includes:

• 1pc x Host
• 1pc x GPT connecting cable
• 1pc x Ethernet cable
• 1pc x OBD 2-in-1 extension cable
• 1pc x Colored jumper cable
• 1pc x Power supply 12V
• 1pc x Resistance 120 ohm
• 6pcs x Banana plug
• 24pcs x Wire accessories, Dupont 2.54mm connector female pins
• 1pc x Manual