Overview
GODIAG GT100 PLUS English Manual
1. The GODIAG GT100 PLUS GPT is designed for:
- Professional auto ECU repair technicians and electronic repair shops focusing on bench ECU programming, cloning and fault testing
- Auto locksmiths performing all-keys-lost matching for VW, Porsche, Mitsubishi, BMW CAS/FEM/BDC series
- Heavy-duty truck repair workshops needing 24V vehicle signal conversion to standard 12V OBD
- Repair stores doing DOIP/ENET programming for BMW, Mercedes, VW, Land Rover, Volvo and Geely
- Technicians requiring real-time voltage/current monitoring to quickly judge damaged ECU and wiring errors
- Workshops replacing vehicle batteries to avoid ECU data loss, immobilizer lock and remote failure
- Maintenance personnel testing airbag 100K CAN communication and old OBD1 converted diagnostic ports
2. Supported Key Functions & Features
1.Use GPT to read and write ECU with devices (such as PCMFLASH, KESSV2)
Support GPT to read and write data without disassembling the ECU.
Supports OBD2 BENCH [CAN bus & K-Line]
Supports GPT BOOT CNF1
Supports OBD2 BENCH [CAN bus & K-Line]
Supports GPT BOOT CNF1
2. Check OBDII diagnostic interface Communication Status and Display Voltage
By connecting the vehicle and diagnostic tool via OBDII, Godiag GT100 PLUS GPT's LED will indicate whether the OBDII diagnostic interface has a good communication with the car. It monitors the voltage of vehicle's OBDII interface and display it in real time. If it is less than 11V, please stop the diagnosis and programming to avoid data loss/ module locked/ the vehicle being unable to start. It supports OBD2 BENCH full protocols.
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1. Manufacturer custom
2. SJE1850 wire
3. Manufacturer custom
4. Power grounding
5. Signal grounding
6. SAEJ2284《CAN》high
7. ISO9141-2&iso, DIS4230-4K wire
8. Manufacturer custom
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9. Manufacturer custom
10. SJE1850 wire《bus->
11. Manufacturer custom
12. Manufacturer custom
13. Manufacturer custom
14. SAEJ2284《CAN》low
15. ISO9141-2 & ISO/DIS 4230-4L wire
16. Car battery positive
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3. Support DOIP-ENET Diagnostics
Support DOIP-ENET communication
Support diagnostic programming and coding for BMW Benz, Volkswagen, Audi and other vehicles that support DOIP protocol. [no software is provided.]
Can be used for diagnostic programming and coding of Land Rover, VOLVO, and Geely vehicles that support DOIP communication. [no software is provided.]
6.) Used to check whether the diagnostic / programming / coding tool can send communication signals.
19.) For BMW-CAS4/CAS4+Programming Test Platform, it’s used to test whether the programmed key works with CAS4 normally
4. 24V to 12V Voltage Conversion
Convert the 24v voltage of the diagnostic interface of heavy trucks, light trucks, pickups, etc. into 12v voltage that can be used by diagnostic equipment.
5.) Connect with Airbag ECU
5.) Connect with Airbag ECU
6.) Used to check whether the diagnostic / programming / coding tool can send communication signals.
7.) 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.
8.) GT100 PLUS GPT program key for VW, Porsche, Mitsubishi etc with all keys lost - activate the instrument or immobilizer module.
A. 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.
B. 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
C. To program Mitsubishi key with all keys lost or to set OBDII when all remote key lost, please short-circuit PIN1-PIN4.
D. To program Porsche Cayenne key with all keys lost or with all remote key lost, please short circuit PIN3-PIN7.
13.) 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.]
9.) Voltage and Current Value Display function
On bench connect the ECU module by using the banana connector or db25 dedicated ECU interface, and Godiag GT100 Plus GPT will display the voltage / current value.
The user can intuitively see the current status of the ECU. There is no current display or The actual displayed current is inconsistent with the engineer's expected current, then you can immediately check whether the wiring is wrong, if the wiring is correct, he can judge that the ECU may be broken, so there is no need to perform diagnostic communication and can directly repair the ECU.
If it shows too much current, then you can also determine if the cable is wrongly connected or the ECU is broken.
10.) 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.
11.) 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.]
12.)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]
13.) 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.]
14.) 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]
15.) 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.
16.) GT100 PLUS GPT will convert the OBD1 port of special truck to the standard OBD2 diagnostic port according to the protocol.
17.) Work with CAS1/CAS2 Mech-Key Test Platform
19.) For BMW-CAS4/CAS4+Programming Test Platform, it’s used to test whether the programmed key works with CAS4 normally
20.) For BMW FEM/BDC Programming Test Platform
21.) More connectors and dedicated modules are under development, please wait...
3. What Vehicles Does It Support?
GODIAG GT100 PLUS GPT supports vehicles equipped with OBDII diagnostic communication systems and compatible ECU communication protocols.
Supported Vehicle Brands
Compatible with various vehicle brands depending on communication protocol and connected diagnostic software.
Examples include:
• BMW
• Mercedes-Benz
• Volkswagen
• Audi
• Porsche
• Toyota
• Mitsubishi
• Land Rover
• Volvo
• Geely
• Other OBDII compatible vehicles
Supported Vehicle Systems
• ECU / Engine Control Module
• BCM Module
• Gateway Module
• Airbag ECU
• Immobilizer System
• FEM/BDC System
• CAS System
• Other supported electronic control modules
Supported Communication Protocols
• CAN Bus
• K-Line
• KWP2000
• J1850 VPW
• J1850 PWM
• DOIP-ENET
• GPT Communication
Note:Vehicle support depends on ECU type, communication protocol, diagnostic software, and connected programming equipment.
4. Please Note the Following Limitations
- This breakout box is only a signal conversion & bench power distribution platform; it does not carry independent diagnostic software
- Cannot complete full vehicle road test; only for bench off-car and on-car OBD communication detection
- Does not support motorcycle ECU systems, construction machinery and agricultural equipment
- DOIP/ENET programming function relies on external third-party diagnostic tools (software not included with this device)
- Cannot independently complete key matching; must cooperate with dedicated key programmers
- Some ultra-new encrypted vehicle gateways depend on the software version of your matched programming tool
- Comes with a free ECU bracket/tablet standard for easy wiring.
5. Hardware Accessories & Licensing Requirements
- Authorization & Activation: No registration code, annual subscription or hidden activation fees; plug-and-play without extra licensing
- Extra Equipment Demand: External diagnostic programmer, flash tool or key programmer required for ECU coding/key matching; separate 12V bench power supply is optional (adapter included)
- Power Supply: Comes with matched 12V power adapter; also powered by vehicle 9V–24V OBD port directly
6. GODIAG GT100 PLUS GPT Specification
- Standard Diagnostic Port: OBDII 16pin
- Working Input Voltage: DC 9V–24V
- Static Power Consumption: 0.5–0.6W
- Matching Power Adapter: AC100V–240V input, DC12.5V 2.5A output
- Operating Temperature: -20℃ ~ 70℃
- Storage Temperature: -40℃ ~ 85℃
- Overall Dimension: L23cm × W18cm × H7cm
- Core Display Function: Real-time digital voltage & current readout
- Built-in Protocols: CAN, K-Line, VPW, PWM, KWP2000, DOIP, ENET, GPT boot
7. Software Update
- Update Method: The GT100 PLUS GPT hardware has no built-in firmware requiring updates; all new model/protocol coverage depends on your external diagnostic/programming tool’s software
- Update Cost: No update fees charged for this breakout box; software costs follow the official policy of your matched third-party device
- Free Update Term: Hardware requires no lifelong firmware iteration
8.GT100 Plus VS GT100+ VS GT100
| Model | GT100 Plus | GT100+ | GT100 |
| 24v-12v voltage conversion | √ | × | × |
| DOIP ENET Diagnostics | √ | × | × |
| GPT connection method to read and write ECU | √ | × | × |
| Connect SK420 SK421 airbag 100K CANBUS communication | √ | × | × |
| Voltage and current value display function | √ | √ | × |
| Pin 1, 9, 3, 11 12, 13, 8 Display CANBUS communication. | √ | √ | × |
| Pin 1, 9, 3, 11 12, 13, 8 Display K-Line Pwm Vpw+ KWP 2000 protocol communication. | √ | √ | √ |
| PIN2. 10 VPW PIN6.14 CANBUS PIN 7.15 k-line | √ | √ | √ |
| Check whether tools can send communication signals. | √ | √ | √ |
| Program key for VW, Porsche, Mitsubishi etc with all keys lost | √ | √ | √ |
| Communicate with a single ECU on bench | √ | √ | √ |
| Replace the auxiliary power supply for the battery | √ | √ | √ |
| Convert the OBD1 port of special truck to the standard OBD2 | √ | √ | √ |
| Test whether the programmed key works with CAS4 | √ | √ | √ |
| Work with BMW FEM/BDC Programming Test Platform | √ | √ | √ |
9. Package List
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
1pc x Manual