Link G4+ Force GDI is a 68-pin wire-in Link ECU on 2 connectors: A (34 pins) and B (34 pins).
It has 4 injector outputs and 4 ignition outputs. Those injector outputs are high-voltage direct-injection drivers, which makes it a specialist box for GDI engines. The ignition outputs are logic-level. Smart coils plug straight in; dumb coils need an igniter in between.
There are 2 dedicated trigger inputs, each happy with a VR or a Hall sensor. Two knock inputs cover both banks of a V engine. It has an onboard wideband controller, so a sensor wires straight in.
It has H-bridge outputs labelled for an electronic throttle, so drive-by-wire runs from the ECU itself. Two CAN buses handle dashes, PDMs and expansion. Four outputs can switch 12V as well as ground.
Spec sheet
| Connectors | A (34), B (34)68 pins in this profile |
|---|---|
| Injector outputs | 4high-voltage direct-injection (GDI) |
| Ignition outputs | 4logic-level: smart coils, or an igniter for dumb coils |
| Dedicated trigger inputs | 2VR or Hall |
| Knock inputs | 2 |
| Onboard wideband controllers | 1 |
| Onboard MAP sensor | Not listed by the maker |
| CAN buses | 2one bus is reached through an adaptor cable |
| Drive-by-wire | Yes |
| High-side outputs | 4 |
| Half-bridge outputs | 2H-bridge pairs for a throttle motor or stepper |
| 5V sensor supply | 1 pin |
Worth knowing
- The 4 GDI drivers can instead run 4 high-impedance port injectors in saturated mode (guide p6); the planner offers it on direct-injection builds only.
- Link's own drawing and text give opposite e-throttle motor polarity; the page gives none.
- Aux 8 and Aux 10 exist from serial 32384 on.
Which builds it suits
Of the 58 swap presets in the planner, 0 fit as they are and 1 fits with add-ons; 57 do not fit at all. The add-on it asks for most often is the Link CAN-Lambda. Where it falls short, it is usually it only runs direct injection. The planner fills anything a preset leaves open with its ordinary defaults, so your own build may land differently.
The Subaru EJ/FA FA20DIT (WRX turbo 2015+) needs Link CAN-Lambda. It can't run the Toyota 2JZ-GE distributor (NA, early): it only runs direct injection. It can't run the Ford Modular 4.6 4V Cobra (NA, cable): it only runs direct injection. It can't run the Nissan VQ35DE Rev-Up (2005-06): it only runs direct injection.
Fits with add-ons 1
- Subaru EJ/FA FA20DIT (WRX turbo 2015+) with Link CAN-Lambda
Does not fit 57
- Toyota 1JZ-GE distributor (NA, early) it only runs direct injection
- Toyota 1JZ-GE VVT-i (coil pack) it only runs direct injection
- Toyota 1JZ-GTE non-VVTi it only runs direct injection
- Toyota 1JZ-GTE VVTi it only runs direct injection
- Toyota 2JZ-GE distributor (NA, early) it only runs direct injection
- Toyota 2JZ-GE VVT-i (coil pack) it only runs direct injection
- Toyota 2JZ-GTE non-VVTi it only runs direct injection
- Toyota 2JZ-GTE VVTi it only runs direct injection
- GM LS1 (Gen3 5.7 alum) it only runs direct injection
- GM LS6 (Gen3 5.7 alum) it only runs direct injection
- GM LS LQ4/LQ9 (Gen3 6.0 iron) it only runs direct injection
- GM LS2 (Gen4 6.0 alum) it only runs direct injection
- GM LS3 (Gen4 6.2 alum, car) it only runs direct injection
- GM LS L76 (Gen4 6.0 alum) it only runs direct injection
- GM LS L92 (Gen4 6.2 alum) it only runs direct injection
- GM LS LY6/L96 (Gen4 6.0 iron) it only runs direct injection
- GM LSA (Gen4 6.2 alum, S/C) it only runs direct injection
- GM LT1 (Gen5 6.2 alum) not enough injector output (low-side)
- GM LT4 (Gen5 6.2 alum, S/C) not enough injector output (low-side)
- Ford Coyote 5.0 Gen1 (2011-14) it only runs direct injection
- Ford Coyote 5.0 Gen2 (2015-17) it only runs direct injection
- Ford Coyote 5.0 Gen3 (2018-23) it only runs direct injection
- Ford Modular 4.6 2V (SOHC) it only runs direct injection
- Ford Modular 4.6 4V Cobra (NA, cable) it only runs direct injection
- Ford Modular 4.6 4V Terminator (S/C, cable) it only runs direct injection
- Ford Modular 5.4 4V Ford GT (S/C, cable) it only runs direct injection
- Ford Modular 5.4 4V GT500 (S/C, DBW) it only runs direct injection
- Ford Coyote Voodoo 5.2 (GT350, flat-plane) it only runs direct injection
- Ford Coyote Predator 5.2 (GT500, cross-plane, S/C) it only runs direct injection
- Ford Barra 4.0 NA (182/190/195) it only runs direct injection
- Ford Barra 4.0 Turbo (240T/245T/270T/310T/325T) it only runs direct injection
- Nissan RB20DET it only runs direct injection
- Nissan RB25DET non-Neo S1 (R33, dumb coils) it only runs direct injection
- Nissan RB25DET non-Neo S2 (R33, smart coils) it only runs direct injection
- Nissan RB25DET Neo (R34) it only runs direct injection
- Nissan RB26DETT (R32/R33, dumb coils) it only runs direct injection
- Nissan RB26DETT (R34, smart coils) it only runs direct injection
- Nissan VR38DETT (R35 GT-R) it only runs direct injection
- Nissan SR20DET (S13) it only runs direct injection
- Nissan SR20DET (S14) it only runs direct injection
- Nissan SR20DET (S15) it only runs direct injection
- Nissan VQ35DE (base, 2003-04) it only runs direct injection
- Nissan VQ35DE Rev-Up (2005-06) it only runs direct injection
- Nissan VQ35HR (High-Rev, 2007+) it only runs direct injection
- Honda K20 (i-VTEC 2.0 NA) it only runs direct injection
- Honda K24 (i-VTEC 2.4 NA) it only runs direct injection
- Subaru EJ/FA EJ20 turbo single-AVCS (EJ207 v7-9) it only runs direct injection
- Subaru EJ/FA EJ20 turbo dual-AVCS (EJ207 GRB 2008+) it only runs direct injection
- Subaru EJ/FA EJ25 turbo single-AVCS (EJ257 2004-07) it only runs direct injection
- Subaru EJ/FA EJ25 turbo dual-AVCS (EJ257 2008+) it only runs direct injection
- Subaru EJ/FA FA20D (BRZ/86 NA) it only runs direct injection
- Mazda Rotary 13B-REW (FD RX-7) it only runs direct injection
- Mazda Rotary 13B-MSP Renesis (RX-8 manual, 6-injector) it only runs direct injection
- Mazda Rotary 13B-MSP Renesis (RX-8 auto, 4-injector) it only runs direct injection
- Mazda Rotary 20B (Eunos Cosmo 3-rotor) it only runs direct injection
- BMW S54 (3.2 NA I6, E46 M3) it only runs direct injection
- BMW N54 (3.0 twin-turbo I6) not enough injector output (low-side)
Plan a build around the Link G4+ Force GDI
Pin table
By connector: A carries 4 ignition outputs, 2 trigger inputs and 6 analog inputs; B carries 4 injector outputs, 2 knock inputs and 9 analog inputs.
Show all 68 pins
| Pin | Function |
|---|---|
| A 1 | +14V Bat |
| A 2 | Inj 1+ |
| A 3 | Inj 2+ |
| A 4 | GDI Pump |
| A 5 | +14V |
| A 6 | +8V |
| A 7 | Shield/Gnd |
| A 8 | Trig 1 |
| A 9 | Trig 2 |
| A 10 | Ign 4 |
| A 11 | Ign 3 |
| A 12 | Ign 2 |
| A 13 | Ign 1 |
| A 14 | An Volt 4 |
| A 15 | Temp 1 |
| A 16 | Temp 2 |
| A 17 | An Volt 1 |
| A 18 | Aux 10 |
| A 19 | Aux 3 |
| A 20 | Aux 2 |
| A 21 | Aux 1 |
| A 22 | An Volt 2 |
| A 23 | DI 3 |
| A 24 | Gnd Out |
| A 25 | Ground |
| A 26 | Aux 8 |
| A 27 | Aux 7 |
| A 28 | Aux 6 |
| A 29 | Aux 5 |
| A 30 | DI 1 |
| A 31 | DI 2 |
| A 32 | +5V |
| A 33 | An Volt 3 |
| A 34 | Ground |
| B 1 | Inj 2B |
| B 2 | Inj 2A |
| B 3 | Inj 1B |
| B 4 | Inj 1A |
| B 5 | +14V Aux 9/10 |
| B 6 | Temp 3 |
| B 7 | Temp 4 |
| B 8 | Knock 2 |
| B 9 | Knock 1 |
| B 10 | Heater |
| B 11 | RE |
| B 12 | IPE |
| B 13 | APE |
| B 14 | MES |
| B 15 | An Volt 6 |
| B 16 | An Volt 7 |
| B 17 | Shield/Gnd |
| B 18 | Aux 4 / EThrottle + |
| B 19 | DI 6 |
| B 20 | DI 5 |
| B 21 | DI 4 |
| B 22 | Gnd Out |
| B 23 | An Volt 8 |
| B 24 | An Volt 9 |
| B 25 | Ground |
| B 26 | Aux 9 / EThrottle - |
| B 27 | DI 10 / CAN 2 H |
| B 28 | DI 9 / CAN 2 L |
| B 29 | DI 8 |
| B 30 | DI 7 |
| B 31 | An Volt 10 |
| B 32 | An Volt 11 |
| B 33 | An Volt 5 |
| B 34 | Ground |
Other Link ECUs
The closest Link unit is the Link G4+ Fury. Against it, this one has 4 injector outputs (the G4+ Fury has 8), 4 ignition outputs (the G4+ Fury has 6), 68 pins (the G4+ Fury has 70) and GDI injector drive (the G4+ Fury is peak-and-hold).
Source: Link documentation for the G4+ Force GDI
Always verify against the manufacturer's manual and your tuner before wiring.