Link G4X XtremeX is a 69-pin wire-in Link ECU on 3 connectors: A (34 pins), B (33 pins) and CAN (2 pins).
It has 8 injector outputs and 8 ignition outputs. The injector drivers are saturated, which means high-impedance injectors. Low-impedance ones need a ballast resistor pack or a different ECU. 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. Wideband control needs an external controller, usually over CAN.
Drive-by-wire is native: 1 throttle from its own H-bridge outputs. Two CAN buses handle dashes, PDMs and expansion. Four outputs can switch 12V as well as ground.
Spec sheet
| Connectors | A (34), B (33), CAN (2)69 pins in this profile |
|---|---|
| Injector outputs | 8saturated (high-impedance only) |
| Ignition outputs | 8logic-level: smart coils, or an igniter for dumb coils |
| Dedicated trigger inputs | 2VR or Hall |
| Knock inputs | 2 |
| Onboard wideband controllers | 0 |
| Onboard MAP sensor | Not listed by the maker |
| CAN buses | 2one bus is reached through an adaptor cable |
| Drive-by-wire | Yes, 1 throttle |
| High-side outputs | 4 |
| Half-bridge outputs | 2H-bridge pairs for a throttle motor or stepper |
| 5V sensor supply | 1 pin |
Worth knowing
- Digital inputs: 10, of which DI 9/10 share pins with CAN 2.
- Onboard MAP: Link does not list one for this model, so the page says 'not listed' rather than 'no'.
Which builds it suits
Of the 58 swap presets in the planner, 0 fit as they are and 55 fit with add-ons; 3 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 not enough drive-by-wire throttle motor (h-bridge). The planner fills anything a preset leaves open with its ordinary defaults, so your own build may land differently.
The GM LS1 (Gen3 5.7 alum) needs Link CAN-Lambda. The Nissan RB26DETT (R34, smart coils) needs Link CAN-Lambda. It can't run the Mazda Rotary 13B-MSP Renesis (RX-8 manual, 6-injector): not enough drive-by-wire throttle motor (h-bridge). It can't run the Mazda Rotary 13B-MSP Renesis (RX-8 auto, 4-injector): not enough drive-by-wire throttle motor (h-bridge). It can't run the BMW S54 (3.2 NA I6, E46 M3): not enough knock inputs.
Fits with add-ons 55
- Toyota 1JZ-GE distributor (NA, early) with Link CAN-Lambda, an external igniter
- Toyota 1JZ-GE VVT-i (coil pack) with Link CAN-Lambda, an external igniter
- Toyota 1JZ-GTE non-VVTi with Link CAN-Lambda, an external igniter
- Toyota 1JZ-GTE VVTi with Link CAN-Lambda, an external igniter
- Toyota 2JZ-GE distributor (NA, early) with Link CAN-Lambda, an external igniter
- Toyota 2JZ-GE VVT-i (coil pack) with Link CAN-Lambda, an external igniter
- Toyota 2JZ-GTE non-VVTi with Link CAN-Lambda, an external igniter
- Toyota 2JZ-GTE VVTi with Link CAN-Lambda, an external igniter
- GM LS1 (Gen3 5.7 alum) with Link CAN-Lambda
- GM LS6 (Gen3 5.7 alum) with Link CAN-Lambda
- GM LS LQ4/LQ9 (Gen3 6.0 iron) with Link CAN-Lambda
- GM LS2 (Gen4 6.0 alum) with Link CAN-Lambda
- GM LS3 (Gen4 6.2 alum, car) with Link CAN-Lambda
- GM LS L76 (Gen4 6.0 alum) with Link CAN-Lambda
- GM LS L92 (Gen4 6.2 alum) with Link CAN-Lambda
- GM LS LY6/L96 (Gen4 6.0 iron) with Link CAN-Lambda
- GM LSA (Gen4 6.2 alum, S/C) with Link CAN-Lambda
- GM LT1 (Gen5 6.2 alum) with a direct-injection driver module, Link CAN-Lambda
- GM LT4 (Gen5 6.2 alum, S/C) with a direct-injection driver module, Link CAN-Lambda
- Ford Coyote 5.0 Gen1 (2011-14) with Link CAN-Lambda, an external igniter
- Ford Coyote 5.0 Gen2 (2015-17) with Link CAN-Lambda, an external igniter
- Ford Coyote 5.0 Gen3 (2018-23) with Link CAN-Lambda, an external igniter
- Ford Modular 4.6 2V (SOHC) with Link CAN-Lambda, an external igniter
- Ford Modular 4.6 4V Cobra (NA, cable) with Link CAN-Lambda, an external igniter
- Ford Modular 4.6 4V Terminator (S/C, cable) with Link CAN-Lambda, an external igniter
- Ford Modular 5.4 4V Ford GT (S/C, cable) with Link CAN-Lambda, an external igniter
- Ford Modular 5.4 4V GT500 (S/C, DBW) with Link CAN-Lambda, an external igniter
- Ford Coyote Voodoo 5.2 (GT350, flat-plane) with Link CAN-Lambda, an external igniter
- Ford Coyote Predator 5.2 (GT500, cross-plane, S/C) with Link CAN-Lambda, an external igniter
- Ford Barra 4.0 NA (182/190/195) with Link CAN-Lambda, an external igniter
- Ford Barra 4.0 Turbo (240T/245T/270T/310T/325T) with Link CAN-Lambda, an external igniter
- Nissan RB20DET with Link CAN-Lambda, an external igniter
- Nissan RB25DET non-Neo S1 (R33, dumb coils) with Link CAN-Lambda, an external igniter
- Nissan RB25DET non-Neo S2 (R33, smart coils) with Link CAN-Lambda
- Nissan RB25DET Neo (R34) with Link CAN-Lambda
- Nissan RB26DETT (R32/R33, dumb coils) with Link CAN-Lambda, an external igniter
- Nissan RB26DETT (R34, smart coils) with Link CAN-Lambda
- Nissan VR38DETT (R35 GT-R) with Link CAN-Lambda
- Nissan SR20DET (S13) with Link CAN-Lambda, an external igniter
- Nissan SR20DET (S14) with Link CAN-Lambda, an external igniter
- Nissan SR20DET (S15) with Link CAN-Lambda
- Nissan VQ35DE (base, 2003-04) with Link CAN-Lambda
- Nissan VQ35DE Rev-Up (2005-06) with Link CAN-Lambda
- Nissan VQ35HR (High-Rev, 2007+) with Link CAN-Lambda
- Honda K20 (i-VTEC 2.0 NA) with Link CAN-Lambda
- Honda K24 (i-VTEC 2.4 NA) with Link CAN-Lambda
- Subaru EJ/FA EJ20 turbo single-AVCS (EJ207 v7-9) with Link CAN-Lambda
- Subaru EJ/FA EJ20 turbo dual-AVCS (EJ207 GRB 2008+) with Link CAN-Lambda
- Subaru EJ/FA EJ25 turbo single-AVCS (EJ257 2004-07) with Link CAN-Lambda
- Subaru EJ/FA EJ25 turbo dual-AVCS (EJ257 2008+) with Link CAN-Lambda
- Subaru EJ/FA FA20D (BRZ/86 NA) with Link CAN-Lambda
- Subaru EJ/FA FA20DIT (WRX turbo 2015+) with a direct-injection driver module, Link CAN-Lambda
- Mazda Rotary 13B-REW (FD RX-7) with Link CAN-Lambda
- Mazda Rotary 20B (Eunos Cosmo 3-rotor) with Link CAN-Lambda
- BMW N54 (3.0 twin-turbo I6) with a direct-injection driver module, Link CAN-Lambda, an external igniter
Does not fit 3
- Mazda Rotary 13B-MSP Renesis (RX-8 manual, 6-injector) not enough drive-by-wire throttle motor (h-bridge)
- Mazda Rotary 13B-MSP Renesis (RX-8 auto, 4-injector) not enough drive-by-wire throttle motor (h-bridge)
- BMW S54 (3.2 NA I6, E46 M3) not enough knock inputs
Plan a build around the Link G4X XtremeX
Pin table
By connector: A carries 4 injector outputs, 4 ignition outputs and 2 trigger inputs; B carries 4 injector outputs, 4 ignition outputs and 2 knock inputs; CAN carries 1 CAN bus.
Show all 69 pins
| Pin | Function |
|---|---|
| A 1 | Inj 4 |
| A 2 | Inj 3 |
| A 3 | Inj 2 |
| A 4 | Inj 1 |
| 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 4 |
| 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 8 |
| B 2 | Inj 7 |
| B 3 | Inj 6 |
| B 4 | Inj 5 |
| B 5 | V Ethrottle |
| B 6 | Temp 3 |
| B 7 | Temp 4 |
| B 8 | Knock 2 |
| B 9 | Knock 1 |
| B 10 | Ign 8 |
| B 11 | Ign 7 |
| B 12 | Ign 6 |
| B 13 | Ign 5 |
| B 15 | Volt 6 |
| B 16 | Volt 7 |
| B 17 | Shield/Gnd |
| B 18 | Aux 9 |
| 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 10 |
| 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 |
| CAN 1H | CAN 1 H (6-pin round connector) |
| CAN 1L | CAN 1 L (6-pin round connector) |
Other Link ECUs
The closest Link unit is the Link G4+ Xtreme. Against it, this one has saturated injector drive (the G4+ Xtreme is peak-and-hold) and 1 drive-by-wire channel (the G4+ Xtreme has none).
Source: Link documentation for the G4X XtremeX
Always verify against the manufacturer's manual and your tuner before wiring.