Link ECU G4X Toyota JZX90 & JZZ30 1JZ-GTE PlugIn ECU — JZX90X

Upgrade your Toyota Chaser, Cresta, Mark II or Soarer with the Link ECU G4X JZX90X PlugIn ECU. This advanced standalone engine-management system connects to the original wiring loom, giving you complete control over fuel, ignition, boost and advanced motorsport functions.

Designed for compatible Toyota vehicles equipped with the non-VVT-i 1JZ-GTE engine, the JZX90X delivers modern engine management without requiring a complete standalone wiring harness.

FREE Link ECU USB Tuning Cable — $70 Value

Every JZX90X purchased from Kugan Tuning includes a compatible Link ECU USB tuning cable at no additional cost. Connect your laptop directly to the ECU for configuration, diagnostics, data logging and professional tuning.

Why Choose the Link G4X JZX90X?

• Designed for compatible non-VVT-i 1JZ-GTE applications
• Plug-compatible with supported JZX90 and JZZ30 wiring looms
• Installs inside the factory JZX90 ECU enclosure
• No complete standalone wiring harness required
• Onboard 7-bar MAP sensor
• Advanced fuel, ignition and boost control
• Launch control, anti-lag and flat-shift capability
• Expandable inputs and outputs
• Four-pin powered CAN connection
• 512 MB of onboard data-logging memory
• FREE Link ECU USB tuning cable included—a $70 value
• FREE Kugan Tuning remote setup support included—a $297 value

Suitable Applications

• Toyota JZX90 Chaser with a non-VVT-i 1JZ-GTE engine and manual transmission
• Toyota JZX90 Cresta with a non-VVT-i 1JZ-GTE engine and manual transmission
• Toyota JZX90 Mark II with a non-VVT-i 1JZ-GTE engine and manual transmission
• Toyota JZZ30 Soarer with a non-VVT-i 1JZ-GTE engine and manual transmission

Important JZZ30 Soarer Installation Note

The JZX90X is pin-compatible with applicable JZZ30 Soarer wiring, but the ECU board does not fit inside the factory JZZ30 ECU enclosure.

JZZ30 installations require an alternative enclosure or secure mounting solution.

Important Compatibility Information

• Compatible with manual-transmission vehicles only
• Designed for compatible non-VVT-i 1JZ-GTE applications
• Compare your factory ECU connector and pinout with the product photos before ordering
• Compatibility depends on the ECU connector and pinout—not only the vehicle model or engine
• Includes an onboard 7-bar MAP sensor
• Factory traction control is not supported
• The traction-control warning light may remain illuminated
• Most other factory vehicle functions are supported, but availability can vary by model and configuration
• Modified vehicles and engine swaps may require additional wiring, sensors and configuration
• Professional installation and calibration are strongly recommended

Powered CAN Connection

This PlugIn ECU uses Link ECU’s four-pin powered CAN connector and cannot use the older CANPCB cable.

Use the Link ECU CANJST4 cable, part number 101-0198, to connect compatible CAN devices. This connection provides:

• CAN communication
• Protected 12V power supply
• Ground connection
• Self-resetting fuse rated for 3 amps of continuous current

The CANJST4 cable is sold separately unless specifically included with your order.

G4X Engine-Management Features

• Up to 6D fuel and ignition mapping
• Sequential fuel injection
• Digital triggering with support for OEM trigger patterns
• OEM idle-control hardware support
• 5D boost control with three switchable tables
• Boost control based on gear, vehicle speed or throttle position
• Launch control
• Anti-lag
• Flat-shift control
• QuickTune automated fuel tuning
• Individual-cylinder correction
• Gear-based fuel, ignition and boost compensation
• Real-time selectable fuel, ignition and boost maps
• Continuous onboard barometric correction
• Staged injection
• Knock control with configurable knock windows
• Hall-effect, variable-reluctance and optical trigger-sensor support
• CAN communication
• Onboard statistics recording
• 512 MB of onboard data-logging memory

I/O Expansion Options

Expansion Connector 1

• Pin 1: Signal ground
• Pin 2: Low-current 5V sensor supply
• Pin 3: Injector output 6
• Pin 4: Digital input 8
• Pin 5: Digital input 7
• Pin 6: Ignition output 8
• Pin 7: Temperature input 4
• Pin 8: Temperature input 3

Electronic-Throttle Connector

• Pin 1: Signal ground
• Pin 2: Low-current 5V sensor supply
• Pin 3: Analog voltage input 4
• Pin 4: Analog voltage input 5
• Pin 5: Analog voltage input 6
• Pin 6: Analog voltage input 7
• Pin 7: Auxiliary output 10
• Pin 8: Auxiliary output 9

What’s Included

• Link ECU G4X Toyota JZX90X PlugIn ECU
• Onboard 7-bar MAP sensor
• FREE Link ECU USB tuning cable—a $70 value
• FREE Kugan Tuning remote setup support—a $297 value

The CANJST4 cable and JZZ30 alternative ECU enclosure are not included unless specified separately.

FREE Remote Setup Support — $297 Value

Purchase your Link ECU from Kugan Tuning and receive complimentary remote setup support to help prepare the ECU and vehicle for startup and professional tuning.

Remote setup support includes:

• Remote ECU connection and setup assistance
• Basemap selection guidance
• Initial ECU configuration assistance
• Startup configuration review
• Sensor and input verification
• Guidance preparing the vehicle for professional tuning

This support helps identify configuration and sensor problems early, reducing unnecessary troubleshooting and wasted dyno time.

Custom remote tuning and dyno tuning are not included unless separately purchased. Successful startup and vehicle operation depend on correct compatibility, installation, wiring, mechanical condition and ECU calibration.