GODIAG GT105 ECU IMMO Prog AD OBD II Breakout Box
Highlights
- Safe & easy IMMO work: avoid disassembling the ECU (Ford, Mitsubishi, Volkswagen) to prevent short circuits.
- Communication assistant: if your scanner reports “no communication”, plug GT105 into the car to verify whether the vehicle–OBD link is OK. If GT105 communicates, the issue may be your device or unsupported vehicle.
- 12V power for key cutting machines
- Convert car battery to 12V DC for diagnostic/programming tools.
- Wake up cluster or anti-theft ECU
- Uninterruptible power during battery replacement.
Introduction
GODIAG ECU IMMO Prog AD GT105 is a connection adapter for automotive technicians, IMMO specialists, and ECU programmers. It is used to short specific OBD2 pins for anti-theft activation/matching, provide ECU diagnostic & programming connections, and draw power from the vehicle battery for on-site service.
GT105 features protocol indicators for PWM+ (Pin 2), CAN-H (Pin 6), CAN-L (Pin 14), and K-Line (Pin 7). When data flows, the corresponding LED blinks so you can quickly judge the communication status and whether your diagnostic/programming tool is communicating.
Designed for outdoor work: take power from the vehicle battery and convert it to a stable 12V DC for charging, programming power, or an independent supply for diagnostic equipment.

Description
- Full-protocol ECU connection cable for programming and power adjustment.
- Independent OBD2 grounds: Pin 4 (chassis GND) and Pin 5 (signal GND) for special module programming.
- Pin 4 and Pin 5 can be switched shorted/non-shorted.
- Durable pure-copper female socket for long service life.
- Battery clips with eco salt-spray treatment, 0.5 mm thickness.
- 0.75 mm² 2-core sheathed DC cable, supports DC5.5×2.5 / DC5.5×2.1.
- Resettable 7A fuse on DC connector.
- Dedicated lab DC power interface.
GT105 provides independent OBD2 Pin 4 GND and Pin 5 signal GND for special programming. With the full-protocol ECU cable, you can connect the ECU on the bench to adjust programming power. LEDs for PWM+ (Pin 2), CAN-H (Pin 6), CAN-L (Pin 14), and K-Line (Pin 7) blink on activity so you can instantly judge link status.

- IMMO AD power adapter: for Ford (post-2016) all-keys-lost with VVDI/OBDSTAR/AUTEL, etc.
- All-keys-lost support: wake up cluster or anti-theft ECU (VAG 4th/5th gen IMMO, Toyota ECU sync, Mitsubishi all-keys-lost, old Porsche Cayenne key learning).
- Protocol LEDs: VPW, CAN-H, CAN-L, K-Line show vehicle ↔ tool communication status.
- 12V power from car battery: supply tools like Xhorse Key Tool Plus, VVDI Prog, CGDI, IM608, etc., for outdoor ECU/IMMO work.
- 12V supply for key cutting machines.
- OBD2 full-protocol ECU programming line: with MPPS, FGTech, KESS V2 etc. for read/write, cloning, tuning. (Cable sold separately.)
- UPS during battery replacement: prevents data loss or key re-matching due to power interruption.




Indicator Light / OBD2 Pinout
| Pin | Description | Pin | Description |
|---|---|---|---|
| 1 | Manufacturer custom | 9 | Manufacturer custom |
| 2 | SAE J1850 Bus+ | 10 | SAE J1850 Bus |
| 3 | Manufacturer custom | 11 | Manufacturer custom |
| 4 | Chassis ground | 12 | Manufacturer custom |
| 5 | Signal ground | 13 | Manufacturer custom |
| 6 | SAE J2284 CAN High | 14 | SAE J2284 CAN Low |
| 7 | ISO 9141-2 / ISO DIS 4230-4 K-Line | 15 | ISO 9141-2 / ISO DIS 4230-4 L-Line |
| 8 | Manufacturer custom | 16 | Battery positive |

Works With
Xhorse Panda and all 12V DC key cutting machines.

IMMO Prog – On-Car Testing





Product Comparison: GT105 vs GT105 II
| Model | GODIAG GT105 II | GODIAG GT105 |
|---|---|---|
| Vehicle voltage display | ✔ | ✘ |
| CR2032 remote battery test | ✔ | ✘ |
| Battery voltage alarm (<11V) | ✔ | ✘ |
| TOYOTA steering angle matching | ✔ | ✘ |
| Lamborghini ID48 IMMO auxiliary activation | ✔ | ✘ |
| DC reverse/short protection | ✔ | ✔ |
| OBD2 4-Pin & 5-Pin short function | ✔ | ✔ |
| VW/AUDI VAG IMMO4 forced activation | ✔ | ✔ |
| TOYOTA ECU IMMO auxiliary activation | ✔ | ✔ |
| Mitsubishi IMMO auxiliary activation | ✔ | ✔ |
| Porsche IMMO auxiliary activation | ✔ | ✔ |
| VPW protocol indicator | ✔ | ✔ |
| CAN-H protocol indicator | ✔ | ✔ |
| CAN-L protocol indicator | ✔ | ✔ |
| K-Line protocol indicator | ✔ | ✔ |
| Battery/UPS supply | DIY clip cable (accessory) | Dedicated 2.5 m clip cable |
Package Includes
- 1× GT105 host
- 1× Power cord with battery clips
- 1× Full-protocol standard OBD2 cable
















