Link G4X AtomX is a 30-pin wire-in Link ECU on 1 connector: A (30 pins).
It has 4 injector outputs and 4 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. One knock input covers an inline engine. Wideband control needs an external controller, usually over CAN.
It does not drive an electronic throttle, so plan on a cable throttle. One CAN bus handles dashes, PDMs and expansion.
Spec sheet
| Connectors | A (30)30 pins in this profile |
|---|---|
| Injector outputs | 4saturated (high-impedance only) |
| Ignition outputs | 4logic-level: smart coils, or an igniter for dumb coils |
| Dedicated trigger inputs | 2VR or Hall |
| Knock inputs | 1 |
| Onboard wideband controllers | 0 |
| Onboard MAP sensor | Not listed by the maker |
| CAN buses | 1 |
| Drive-by-wire | No |
| High-side outputs | 0 |
| Half-bridge outputs | 0 |
| 5V sensor supply | 1 pin |
Worth knowing
- Knock input (A6) exists on hardware version 3.0 and later only.
- Link's guide and store page disagree on reusing spare injector drives as outputs.
- 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 6 fit with add-ons; 52 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 injector output (low-side). The planner fills anything a preset leaves open with its ordinary defaults, so your own build may land differently.
The Nissan SR20DET (S14) needs Link MXS Strada 5" Dash and Link CAN-Lambda. The Subaru EJ/FA EJ20 turbo dual-AVCS (EJ207 GRB 2008+) needs Link MXS Strada 5" Dash and Link Razor PDM. It can't run the GM LSA (Gen4 6.2 alum, S/C): not enough injector output (low-side). It can't run the Nissan RB25DET Neo (R34): not enough injector output (low-side).
Fits with add-ons 6
- Nissan SR20DET (S13) with Link CAN-Lambda, an external igniter
- Nissan SR20DET (S14) with Link MXS Strada 5" Dash, Link CAN-Lambda, an external igniter
- Nissan SR20DET (S15) with Link MXS Strada 5" Dash, Link CAN-Lambda
- Subaru EJ/FA EJ20 turbo single-AVCS (EJ207 v7-9) with Link MXS Strada 5" Dash, Link CAN-Lambda
- Subaru EJ/FA EJ20 turbo dual-AVCS (EJ207 GRB 2008+) with Link MXS Strada 5" Dash, Link Razor PDM, Link CAN-Lambda
- Mazda Rotary 13B-REW (FD RX-7) with Link Razor PDM, Link MXS Strada 5" Dash, Link CAN-Lambda
Does not fit 52
- Toyota 1JZ-GE distributor (NA, early) not enough injector output (low-side)
- Toyota 1JZ-GE VVT-i (coil pack) not enough injector output (low-side)
- Toyota 1JZ-GTE non-VVTi not enough injector output (low-side)
- Toyota 1JZ-GTE VVTi not enough injector output (low-side)
- Toyota 2JZ-GE distributor (NA, early) not enough injector output (low-side)
- Toyota 2JZ-GE VVT-i (coil pack) not enough injector output (low-side)
- Toyota 2JZ-GTE non-VVTi not enough injector output (low-side)
- Toyota 2JZ-GTE VVTi not enough injector output (low-side)
- GM LS1 (Gen3 5.7 alum) not enough injector output (low-side)
- GM LS6 (Gen3 5.7 alum) not enough injector output (low-side)
- GM LS LQ4/LQ9 (Gen3 6.0 iron) not enough injector output (low-side)
- GM LS2 (Gen4 6.0 alum) not enough injector output (low-side)
- GM LS3 (Gen4 6.2 alum, car) not enough injector output (low-side)
- GM LS L76 (Gen4 6.0 alum) not enough injector output (low-side)
- GM LS L92 (Gen4 6.2 alum) not enough injector output (low-side)
- GM LS LY6/L96 (Gen4 6.0 iron) not enough injector output (low-side)
- GM LSA (Gen4 6.2 alum, S/C) not enough injector output (low-side)
- 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) not enough injector output (low-side)
- Ford Coyote 5.0 Gen2 (2015-17) not enough injector output (low-side)
- Ford Coyote 5.0 Gen3 (2018-23) not enough injector output (low-side)
- Ford Modular 4.6 2V (SOHC) not enough injector output (low-side)
- Ford Modular 4.6 4V Cobra (NA, cable) not enough injector output (low-side)
- Ford Modular 4.6 4V Terminator (S/C, cable) not enough injector output (low-side)
- Ford Modular 5.4 4V Ford GT (S/C, cable) not enough injector output (low-side)
- Ford Modular 5.4 4V GT500 (S/C, DBW) not enough injector output (low-side)
- Ford Coyote Voodoo 5.2 (GT350, flat-plane) not enough injector output (low-side)
- Ford Coyote Predator 5.2 (GT500, cross-plane, S/C) not enough injector output (low-side)
- Ford Barra 4.0 NA (182/190/195) not enough injector output (low-side)
- Ford Barra 4.0 Turbo (240T/245T/270T/310T/325T) not enough injector output (low-side)
- Nissan RB20DET not enough injector output (low-side)
- Nissan RB25DET non-Neo S1 (R33, dumb coils) not enough injector output (low-side)
- Nissan RB25DET non-Neo S2 (R33, smart coils) not enough injector output (low-side)
- Nissan RB25DET Neo (R34) not enough injector output (low-side)
- Nissan RB26DETT (R32/R33, dumb coils) not enough injector output (low-side)
- Nissan RB26DETT (R34, smart coils) not enough injector output (low-side)
- Nissan VR38DETT (R35 GT-R) not enough injector output (low-side)
- Nissan VQ35DE (base, 2003-04) not enough injector output (low-side)
- Nissan VQ35DE Rev-Up (2005-06) not enough injector output (low-side)
- Nissan VQ35HR (High-Rev, 2007+) not enough injector output (low-side)
- Honda K20 (i-VTEC 2.0 NA) not enough drive-by-wire throttle motor (h-bridge)
- Honda K24 (i-VTEC 2.4 NA) not enough drive-by-wire throttle motor (h-bridge)
- Subaru EJ/FA EJ25 turbo single-AVCS (EJ257 2004-07) not enough drive-by-wire throttle motor (h-bridge)
- Subaru EJ/FA EJ25 turbo dual-AVCS (EJ257 2008+) not enough drive-by-wire throttle motor (h-bridge)
- Subaru EJ/FA FA20D (BRZ/86 NA) not enough map sensor inputs
- Subaru EJ/FA FA20DIT (WRX turbo 2015+) not enough map sensor inputs
- 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)
- Mazda Rotary 20B (Eunos Cosmo 3-rotor) not enough ignition outputs
- BMW S54 (3.2 NA I6, E46 M3) not enough injector output (low-side)
- BMW N54 (3.0 twin-turbo I6) not enough injector output (low-side)
Plan a build around the Link G4X AtomX
Pin table
Connector A carries 4 injector outputs, 4 ignition outputs and 2 trigger inputs.
Show all 30 pins
| Pin | Function |
|---|---|
| A 1 | Inj 4 |
| A 2 | Inj 3 |
| A 3 | Inj 2 |
| A 4 | Inj 1 |
| A 5 | + 14V |
| A 6 | Knock |
| 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 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 24 | Gnd Out |
| A 25 | Ground |
| A 28 | CAN H |
| A 29 | CAN L |
| A 30 | DI 1 |
| A 31 | DI 2 |
| A 32 | + 5V |
| A 33 | An Volt 3 |
| A 34 | Ground |
Other Link ECUs
The closest Link unit is the Link G4X MonsoonX. Against it, this one has 30 pins (the G4X MonsoonX has 34).
Source: Link documentation for the G4X AtomX
Always verify against the manufacturer's manual and your tuner before wiring.