WRXLink (3–4) WRX4X

Description

The WRX4X fits inside the factory enclosure and replaces the OEM ECU of V3–V4 WRX cars with the EJ20 engine, with no alteration to the wiring loom.

G4X Plug-In ECUs replace the factory ECU and fit inside the original enclosure, with no alteration to the vehicle wiring loom. All the features of a Link G4X wire-in ECU, with a direct-fit installation.

Important notes

• Before purchasing, check that your factory ECU connector matches the header shown in the photos.
• Manual transmission only.
• An intake air temperature (IAT) sensor is highly recommended.
• Most factory features are supported.
• This ECU needs a hardware modification before E-Throttle (drive-by-wire) can be used.

Compatible applications

• Subaru Impreza GC8D
• Subaru Impreza GC8E
• WRX and STI from 09/1996 to 08/1998

G4X key features (where applicable)

• Up to 6D fuel and ignition mapping
• Precision closed loop cam control (four cam, independent control)
• Sequential fuel delivery
• Digital triggering, all OEM patterns
• OEM idle hardware supported
• 5D boost control with three switchable tables
• Motorsport features: antilag, launch, flat shift
• Continuous barometric correction (on board)
• CAN port
• QuickTune automated fuel tuning
• Individual cylinder correction
• USB tuning cable included
• Stats recording into on-board memory
• Gear compensations for spark, boost and fuel
• Real time selectable dual fuel, ignition and boost maps
• Sync and crank sensors can be a combination of Hall effect, variable reluctance or optical
• Boost control referenced to gear, speed or throttle position
• 512 MB data logging memory
• Staged injection
• Knock control with windowing

I/O expansion

Inputs and outputs available on the expansion connectors, as per Link documentation.

XS connector 1

Gnd	Sensor Ground Only
+5V	Low Current +5V Supply
DI 5	Digital Input
DI 6	Digital Input
Volt 5	Analog 0-5V input
Volt 6	Analog 0-5V input
Temp 4	Temperature sensor input
Temp 3	Temperature sensor input

Expansion connector 2

Gnd	Sensor Ground Only
+5V	Low Current +5V Supply
DI 9	Digital Input
DI 10	Digital Input
Volt 8	Analog 0-5V input
Volt 9	Analog 0-5V input
Ign 7	Ignition 7 Auxiliary Output
Ign 8	Ignition 8 Auxiliary Output