Link G4+ Thunder pinout
ecurecovery.com/pinouts/link-ecu/g4-plus-thunder · Every pin from Link's own guide for this ECU, read twice · data checked 2026-11-01
Pinout
Link G4+ Thunder pinout
Every pin of the 34-pin A, 34-pin B, 26-pin C, and 26-pin D connectors, with the wire colours of Link's harness. Tap a pin to see what it does.
Every pin from Link's own guide for this ECU, read twicePick any pin on the drawing or in the table to see its function, its wire colour and the documents it was checked in.
Link G4+ Thunder connector A pinout (34-pin)
| Pin | Function | Wire |
|---|---|---|
| A1 | Inj 4 | Brown/Orange |
| A2 | Inj 3 | Brown/Red |
| A3 | Inj 2 | Brown |
| A4 | Inj 1 | Brown/Black |
| A5 | +14V | Red |
| A6 | +8V | Red/White |
| A7 | Shield/Gnd | Green |
| A8 | Trig 1 | Black |
| A9 | Trig 2 | Red |
| A10 | Ign 4 | Blue/Orange |
| A11 | Ign3 | Blue/Red |
| A12 | Ign 2 | Blue/Brown |
| A13 | Ign 1 | Blue |
| A14 | An Volt 4 | White/Black |
| A15 | Temp 1 | Yellow |
| A16 | Temp 2 | Yellow/Brown |
| A17 | An Volt 1 | Yellow/Blue |
| A18 | Aux 4 | Orange |
| A19 | Aux 3 | Orange/Red |
| A20 | Aux 2 | Orange/Brown |
| A21 | Aux 1 | Orange/Black |
| A22 | An Volt 2 | White/Brown |
| A23 | DI 3 | Grey/Red |
| A24 | Gnd Out | Green |
| A25 | Ground | Black |
| A26 | Aux 8 | Orange/Purple |
| A27 | Aux 7 | Orange/Blue |
| A28 | Aux 6 | Orange/Green |
| A29 | Aux 5 | Orange/Yellow |
| A30 | DI 1 | Grey/Black |
| A31 | DI 2 | Grey/Brown |
| A32 | +5V | Red/Blue |
| A33 | An Volt 3 | Yellow/Black |
| A34 | Ground | Black |
Link G4+ Thunder connector B pinout (34-pin)
| Pin | Function | Wire |
|---|---|---|
| B1 | Inj 8 | Brown/Purple |
| B2 | Inj 7 | Brown/Blue |
| B3 | Inj 6 | Brown/Green |
| B4 | Inj 5 | Brown/Yellow |
| B5 | +14V Aux 9/10 | Red |
| B6 | Temp 3 | Yellow/Red |
| B7 | Temp 4 | Yellow/Orange |
| B8 | Knock 2 | Blue |
| B9 | Knock 1 | Blue |
| B10 | Ign 8 | Blue/Purple |
| B11 | Ign 7 | Blue/Black |
| B12 | Ign 6 | Blue/Green |
| B13 | Ign 5 | Blue/Yellow |
| B14 | An Volt 12 | Blue/White |
| B15 | Volt 6 | White/Red |
| B16 | Volt 7 | White/Orange |
| B17 | Shield/Gnd | Green |
| B18 | Aux 9 | Purple |
| B19 | DI 6 | Grey/Green |
| B20 | DI 5 | Grey/Yellow |
| B21 | DI 4 | Grey/Orange |
| B22 | Gnd Out | Green |
| B23 | An Volt 8 | White/Yellow |
| B24 | An Volt 9 | White/Green |
| B25 | Ground | Black |
| B26 | Aux 10 | Purple/White |
| B27 | DI 10 | Grey/Purple |
| B28 | DI 9 | Grey/White |
| B29 | DI 8 | Grey |
| B30 | DI 7 | Grey/Blue |
| B31 | An Volt 10 | White/Blue |
| B32 | An Volt 11 | White |
| B33 | An Volt 5 | Yellow/Green |
| B34 | Ground | Black |
Link G4+ Thunder connector C pinout (26-pin)
| Pin | Function | Wire |
|---|---|---|
| C1 | Main Relay + | - |
| C2 | Ign Sw | - |
| C3 | MES 1 | - |
| C4 | APE 1 | - |
| C5 | IPE 1 | - |
| C6 | RE 1 | - |
| C7 | Heater 1 | - |
| C8 | Main Relay - | - |
| C9 | MES 2 | - |
| C10 | APE 2 | - |
| C11 | IPE 2 | - |
| C12 | RE 2 | - |
| C13 | Heater 2 | - |
| C14 | DI 11 + | - |
| C15 | DI 12 + | - |
| C16 | DI 13 + | - |
| C17 | DI 14 + | - |
| C18 | DI 15 + | - |
| C19 | DI 16 + | - |
| C20 | DI 11 - | - |
| C21 | DI 12 - | - |
| C22 | DI 13 - | - |
| C23 | DI 14 - | - |
| C24 | DI 15 - | - |
| C25 | DI 16 - | - |
| C26 | Ground | - |
Link G4+ Thunder connector D pinout (26-pin)
| Pin | Function | Wire |
|---|---|---|
| D1 | +14 V Aux 17-20 | - |
| D2 | Aux 19 | - |
| D3 | Aux 20 | - |
| D4 | +5V | - |
| D5 | Gnd Out | - |
| D6 | TC 2 + | - |
| D7 | TC 2 - | - |
| D8 | An Volt 13 | - |
| D9 | An Volt 14 | - |
| D10 | An Volt 15 | - |
| D11 | An Volt 16 | - |
| D12 | TC 1 + | - |
| D13 | TC 1 - | - |
| D14 | Aux 11 | - |
| D15 | Aux 12 | - |
| D16 | Aux 13 | - |
| D17 | Aux 14 | - |
| D18 | Aux 15 | - |
| D19 | Aux 16 | - |
| D20 | Aux 17 | - |
| D21 | Aux 18 | - |
| D22 | CAN 2 H | - |
| D23 | CAN 2 L | - |
| D24 | CAN 1 H | - |
| D25 | CAN 1 L | - |
| D26 | Ground | - |
Link G4+ Thunder pins at a glance
- Which pins are CAN on the Link G4+ Thunder?
- CAN 2 H: pin D22. CAN 2 L: pin D23. CAN 1 H: pin D24. CAN 1 L: pin D25.
- Which pins are the crank and cam inputs on the Link G4+ Thunder?
- Trig 1: pin A8 (Black). Trig 2: pin A9 (Red).
- Which pins are the injector outputs on the Link G4+ Thunder?
- Inj 4: pin A1 (Brown/Orange). Inj 3: pin A2 (Brown/Red). Inj 2: pin A3 (Brown). Inj 1: pin A4 (Brown/Black). Inj 8: pin B1 (Brown/Purple). Inj 7: pin B2 (Brown/Blue). Inj 6: pin B3 (Brown/Green). Inj 5: pin B4 (Brown/Yellow).
- Which pins are the ignition outputs on the Link G4+ Thunder?
- Ign 4: pin A10 (Blue/Orange). Ign3: pin A11 (Blue/Red). Ign 2: pin A12 (Blue/Brown). Ign 1: pin A13 (Blue). Ign 8: pin B10 (Blue/Purple). Ign 7: pin B11 (Blue/Black). Ign 6: pin B12 (Blue/Green). Ign 5: pin B13 (Blue/Yellow).
- Which pins are ground on the Link G4+ Thunder?
- Gnd Out: pins A24, B22, D5. Ground: pins A25, A34, B25, B34, C26, D26.
- Which pins power the Link G4+ Thunder?
- +14V: pin A5 (Red). Ign Sw: pin C2.
- Which pins are the sensor supplies on the Link G4+ Thunder?
- +8V: pin A6 (Red/White). +5V: pins A32, D4.
- Which pins are the wideband sensor connections on the Link G4+ Thunder?
- MES 1: pin C3. APE 1: pin C4. IPE 1: pin C5. RE 1: pin C6. Heater 1: pin C7. MES 2: pin C9. APE 2: pin C10. IPE 2: pin C11. RE 2: pin C12. Heater 2: pin C13.
Link G4+ Thunder pinout sheet
A printable sheet with the connector drawings and every pin, made from the checked data on this page.
Where this comes from
Only Link's own documents. Pin names and notes are written exactly as Link writes them.
Link quick start guide for this ECU
Link guide for the G4+ Xtreme, the same pin
Link guide for the G4X XtremeX, the same pin
Plug drawing: TE Connectivity customer drawing (used for the drawing only)Third party
How we checked it
- Link publishes one pinout document for each ECU: its quick start guide. Every pin here comes from that guide. Link's full wiring manual is only inside its PCLink software, so it is not used.
- A script reads every pin from the guide. Each pin is then read a second time: from Link's guide for a sister ECU that shows the same pin, from the I/O table in the same guide, or by eye from the same guide.
- A pin is only shown when both readings agree on its function and, where Link gives one, its wire colour. Pin numbers are the ones Link prints in its guides.
- Labels, notes and wire colours are written exactly as Link writes them, for example Brown/Orange.
ECU Recovery is not affiliated with Link. Link and its product names are trademarks of Link. If your harness came with its own diagram, check your wiring against it.
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