Overview
- Professional auto locksmiths handling all-keys-lost matching for VAG, Ford, Toyota, Porsche, Mitsubishi vehicles
- ECU tuning & repair technicians performing bench/OBD ECU read, write and clone with MPPS, KESSV2, FGTECH etc.
- General repair shops needing stable uninterrupted power supply during vehicle battery replacement
- Field mobile technicians without fixed workshop power for outdoor ECU & IMMO programming
- Technicians using Autel, Xhorse, CGDI, VVDI series key programmers and diagnostic tablets
- Automotive electronics training personnel for OBD protocol signal judgment practice

2. Supported Key Functions & Features
ECU Programming Power Supply
The GT105 II provides stable 12V power during ECU operations.
Supports:
• ECU data reading
• ECU data writing
• ECU cloning
• ECU tuning
• ECU programming connection
Compatible programming devices include:
• MPPS
• FGTECH
• KESS V2
• BYSHUT
• DISPROG
• Other compatible ECU programmers
Full Protocol OBD2 Jumper Function
The included OBD2 universal jumper supports:
• OBD2 ECU connection
• Programming power adjustment
• Special ECU programming connections
Supports independent:
• PIN 4 Body Ground
• PIN 5 Signal Ground
PIN 4 and PIN 5 can be switched between:
• Short circuit mode
• Independent ground mode
Stable Power Supply During Battery Replacement
The GT105 II prevents ECU data loss during vehicle battery replacement.
It helps maintain:
• ECU memory data
• Audio system settings
• Remote key settings
• Window initialization
• Throttle adaptation data
Helps prevent unnecessary fault codes caused by power interruption.
12V Outdoor Power Supply
The GT105 II can obtain 12V power directly from a vehicle battery.
Applications include:
• Outdoor ECU programming
• IMMO data reading
• Key programming
• Diagnostic device power supply
• 12V key cutting machine power supply
IMMO Activation and Key Matching Support
The GT105 II helps activate immobilizer systems and wake up modules for key programming.
Supported applications include:
• Ford all keys lost smart key matching
• VAG 4th and 5th generation IMMO wake-up
• Toyota ECU synchronization
• Mitsubishi all keys lost matching assistance
• Porsche Cayenne IMMO key learning
Communication Indicator Monitoring
Built-in indicator lights display communication status.
Supports monitoring:
• PWM
• CAN High
• CAN Low
• K-Line
When communication occurs, the corresponding indicator flashes.
Technicians can quickly judge:
• Whether the diagnostic device communicates with the vehicle
• Whether ECU communication is normal
Ignition Simulation Function
Built-in ignition switch provides simulated ignition power.
Features:
• Independent ignition control
• Supports ECU operations requiring ignition ON/OFF status
• Includes ignition connection cables
Special ECU Ground Connection
Supports special ECU programming requirements through:
• Independent GND4
• Independent GND5
Allows technicians to connect ECUs requiring separate grounding methods.
Functions Display:
A. Connect ECU module, special power supply to read and write ECU data, ECU clone, programming and adjustment.



B. GT105 II provides uninterrupted power supply during the car battery replacement process to protect the car ECU data.

3. What Vehicles Does It Support?
The GODIAG GT105 II is a universal automotive ECU programming and IMMO power adapter. It is not limited to specific vehicle brands, years, or systems.
It supports vehicles equipped with compatible:
• OBD2 diagnostic systems
• CAN communication systems
• K-Line communication systems
Supported Vehicle Brands Include:
European Vehicles
• Volkswagen
• Audi
• BMW
• Mercedes-Benz
• Porsche
• Other European brands
Asian Vehicles
• Toyota
• Mitsubishi
• Hyundai
• Kia
• Other Asian brands
American Vehicles
• Ford
• General Motors
• Other vehicles using supported communication protocols
Supported Vehicle Systems
• ECU
• IMMO ECU
• Instrument cluster
• Engine control module
• Transmission control module
• Other programmable modules
Supported Communication Protocols
• CAN BUS
• CANH
• CANL
• K-Line
• PWM
• ISO9141 related communication
4. Multi-Brand All-Keys-Lost IMMO Unlock & Matching
- Post-2016 Ford smart key all-lost release (disarms vehicle alarm & IMMO lock state for normal key programming with Xhorse/Autel/VVDI tools)
- VAG 4th / 5th generation IMMO instrument wake-up for A4/A6L/Q5/Touareg card key data collection
- Toyota ECU synchronization after engine ECU replacement & all-keys-lost matching
- Mitsubishi remote key registration and old Porsche Cayenne IMMO key learning
5. Real-Time Protocol Communication Indicator
| 1. Manufactory custom 2. SJE1850 wire 3. Manufactory custom 4. Power grounding 5. Signal grounding 6. SAEJ2284《CAN》high 7. ISO9141-2&iso, DIS4230-4K wire 8. Manufactory custom |
9. Manufactory custom 10. SJE1850 wire (bus) 11. Manufactory custom 12. Manufactory custom 13. Manufactory custom 14. SAEJ2284《CAN》low 15. ISO9141-2 & ISO/DIS 4230-4L wire 16. Car battery positive |

6. Hardware Industrial Design
Supported Brands
Supported Year Range
- VAG: All models with 4/5 gen IMMO (2009–latest)
- Ford: All smart key vehicles manufactured after 2016
- Porsche: Old Cayenne and new VAG-platform Porsche models
- Toyota / Mitsubishi: 2000–latest passenger vehicles
- All OBD2-compliant cars from 1996 to present for ECU programming and battery backup power
Supported Systems
- Only fits 12V passenger vehicles; incompatible with 24V heavy trucks, buses, construction machinery, motorcycles and marine equipment.
- Cannot independently complete ECU coding or key matching; must cooperate with separate key programmer / ECU flash tool.
- Does not support non-OBD old vehicles without standard 16pin diagnostic port.
- Not waterproof; only for indoor & dry outdoor use, cannot work under rainy or humid conditions.
- Unable to repair physical ECU hardware damage; only provides signal conversion and stable power supply.
- Some ultra-new limited-edition vehicles may have special IMMO logic requiring tool software update for compatibility.
- Cannot replace dedicated bench power supply for long-hour full-load ECU bench work.
- No built-in chip activation, annual subscription or extra authorization fees for GT105 II itself; plug-and-play out of box.
- Mandatory matched equipment (sold separately): Xhorse Key Tool Plus, Autel IM608, VVDI Prog, CGDI, MPPS, KESSV2, FGTECH and other ECU/key programming devices.
- All core matching accessories (battery clip cable, full-protocol jumper, resistance accessories) are included in standard package, no extra adapters required for mainstream operations.
- No paid software license tied to this breakout box; authorization rights depend on your matched programming tool.
- GT105 II is pure passive wiring breakout hardware with no embedded firmware or independent operating system.
- Dependent PC software: Official software of matched ECU flash tools (MPPS, KESSV2, Xhorse Multi Prog, VVDI2 etc.)
- Supported Computer OS: Windows 7 / Windows 10 / Windows 11 (32bit & 64bit); Mac OS and Linux are not supported.
- No mobile APP required; all vehicle operations are controlled by your main diagnostic/programming device.
- GT105 II has no onboard firmware, so there is zero update demand, no update cost and no free update expiration date.
- All vehicle model compatibility expansion, protocol upgrades and bug fixes rely on the official software updates of your matched ECU/key programmer.
- Using GT105 II does not generate extra update fees; follow the original update policy of your main programming device.
- Standard manufacturer hardware warranty: 12 months from original purchase date.
- Warranty coverage: Factory defects of main breakout box circuit, OBD socket, internal wiring and included jumper cable under normal dry workshop use.
- Excluded from free warranty: Artificial cutting, liquid corrosion, overvoltage burnout, unauthorized disassembly, bent pins and cable wear caused by improper plugging.
- 30-day return service available; buyer bears return shipping cost for non-quality issues. Lifetime text & email technical support.
