Link ECU | G4X MR2Link V.1 | TST185X | Plug - In

Link ECU 221-4000

( 221-4000 )


Used for: Tuning the 3GSTE engine commonly found in the Toyota '89+ MR2 / Celica.

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Link ECU | "G4X MR2Link V.1 TST185X"

  • Designed for: 3GSTE Engine.
    Full list of suitable applications below.
  • The G4X MR2Link TST185X is a Plug-In ECU developed by Link Engine Management, designed to maximise the potential of your car.
  • Link's TST185X fits directly into the factory enclosure, requires no alteration of the factory wiring loom / harness [for models listed], and is designed to be simple to install.
  • This ECU works for manual transmissions only | most factory features are still supported.
  • A Link Air Temp Sensor is highly recommended for use with this ECU.
  • MR2Link V.1 TST185X Supports the following vehicles:
    Toyota MR2 (SW20) [1989 - 1992]
    Toyota Celica ST185 [1989 - 1993] | Carlos Sainz S.E NOT compatible.

Features | "G4X MR2Link TST185X"

I/O Expansion Options | Inputs / Outputs:

  • GND | Sensor Ground Only
  • +5V OUT | Low Current +5V Supply
  • DI 5 | Digital Input for switching functions
  • DI 6 | Digital Input for switching functions
  • DI 4 | Digital Input for switching functions 
  • An Volt 4 | Analog 0-5V Input
  • An Volt 5 | Analog 0-5V Input
  • An Volt 6 | Analog 0-5V Input

Ignition Expansion:

  • An ignition expansion is provided, allowing you to convert to a Direct Spark Ignition System. Alternatively, these outputs can be used to drive auxiliary devices. The following pinout describes the available connections:
    1 | Ignition 1
    2 | Ignition 2
    3 | Ignition 3
    4 | Ignition 4


G4X Plug-In Features:

  • Up to 6D Fuel & Ignition Mapping
  • Precision Closed Loop Cam Control (Four Cam | Independent Control)
  • Sequential Fuel Delivery
  • Digital Triggering, all OEM Patterns
  • 5D Boost Control w/ Three (3) Switchable Tables
  • OEM Idle Hardware Supported
  • Motorsport features; Anti-Lag, Launch Control, Flat Shift
  • Continuous Barometric Correction [on board]
  • CAN Port
  • QuickTune - Automated Fuel Tuning
  • Individual Cylinder Correction
  • USB Tuning Cable included
  • Records into On-Board memory
  • Gear Compensations for Spark, Boost and Fuel
  • More...

Full Specification [Link ECU] 

Link ECU Supply, Installation & Calibration:

  • Redline Tuning can supply, install & calibrate both the Link G4X MR2Link V1 TST185X ECU or any other Link Engine Management Product currently available in Essex, London and the South East of England.

Contact Redline Tuning 

Important Notes:

  • Please double check / cross reference your existing ECU's pinout with the images we have provided, to ensure connections are correct.

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  • Please note that we do not carry stock for all Link Engine Management products. If we do not have an item in stock it will be ordered for you, please allow up to 2 extra business days for us to process your order. If you need an item urgently, or would like to know if an item is in stock, please contact us here
  • Prices shown do not include VAT, this will be calculated and added at checkout for UK customers.
  • For international customers, sales tax will not be charged at checkout. You will be responsible for the VAT equivalent wherever you live. This will be charged by the courier prior to delivery. We have zero control over these charges and they vary by the destination country. We advise that you check before ordering if you are unsure.
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