Syvecs Toyota Yaris GR AWD Controller

£750.00 (+VAT)

All Wheel Drive (AWD) control module from Syvecs suitable for the Toyota Yaris GR. This Control Module is a standalone AWD/4WD/Centre Diff controller designed to offer more control than OEM Units.

OEM designed controllers are locked down and not adjustable, By simply fitting the Syvecs AWD Module, a whole new level of control is available. The unit allows users to optimise control and provide the best performance available from the powertrain.


The Syvecs Toyota Yaris GR AWD Controller is a standalone AWD/4WD/Centre Diff controller designed to control any AWD/4WD Solenoid/Motor to a maximum of 30 Amps via pin sharing logic. OEM designed controllers are locked down and not adjustable. By simply fitting the Syvecs AWD Controller, a whole new level of control is available. The unit allows users to optimise control and provide the best performance available from the powertrain.

The Yaris GR version of the AWD Controller replicates all the OEM CAN information as well as pick up lots of variable from the OEM Can to link into the control strategies like Steering Angle, Brake Pressure, Rpm, Tps, Lateral G, Yaw, Long G, Speeds, Temperatures and mode switches.

The Sport Mode Button on the Yaris is used for Map switching so allows users to be able to change between AWD Select 1, 2 and 3 which means all the maps below can be adjusted. You can also enable the burnout mode to be active when Hazards, Handbrake or external switch is active.

Syvecs also sell an optional loom to allow external Burnout switches to be mounted and Live adjustment potentiometers which gives drivers the ability to adjust the AWD Duty on the move or go 2wd from the flick of a switch.

Limp Protection options for large slip, high current, high temps which warn the driver but keep awd active unlike the OEM controllers which shut down the outputs which is not ideal with high horsepower!

Available Maps:

4 x Adders with enable maps

  • Left Foot Braking
  • Front Slip
  • Rear Slip
  • Centre Slip

4 x Multipliers with enable maps

  • Steering Angle
  • AWD Temp
  • AWD Pressure
  • AWD Potentiometer
  • Tyre Diameter adjustment under sensors

2WD / Burnout Mode

  • Via Dedication Switched input
  • Via Can bus Message
  • Via OEM Functions


  • Maximum Duty
  • Launch Control Limit
  • Duty Rate of Change
  • Decay/Hold Functions

Limp Mode

  • Over Current Protection
  • Over Slip Protection
  • Over Temp Protection

Cooling Pump control

  • AWD Cooling pump control logic


  • The Syvecs AWD Module also has a dedicated Can bus transmit area where users can send variables from the AWD to external control units for monitoring or to OEM Canbus system via custom Identifiers and byte structuring

Sensors / Switches

  • External sensors can be connected to the AWD module and then linearized in the Syvecs Scal Software
  • When the AWD is fine tuned to suit torque and chassis setups then huge improvements can be gained with Syvecs modules in acceleration



  • Maximum of 30 Amps via pin sharing (HBR1&2 or HBR3&4)
  • Onboard Current Monitoring of each output
  • 2 x CanBus – Configurable Transmit Via Scal Program
  • 4 x Analog inputs for assigning Burnout Switch, Adjustment Pot, Pressure sensor and Temp sensor
  • USB Connection – Dedicated Scal software with full calibration control
  • VCDS Support – Communicates with OEM Tools and Replicates OEM Haldex Ecu’s
  • Mains Power control circuit based from Ignition Switch
  • Reverse Polarity Protection
  • Weatherproof Enclosure
  • 125c Temperature capable
  • 6v to 25v capable

Installation Manual


Yaris GR AWD Controller Installation manual

Frequently Asked Questions:

Question – I’ve been reading a bit on this product and just want to make sure I understand the advantages of it. One is that it doesn’t fully disengage the rear as the OEM does, when the clutches reach around 100 degrees. Correct? It will become more FWD, slower than stock, but not 100% FWD, or it will become 100% FWD but just slower, which I get is safer especially mid-corner?

Answer – Correct it will slowly lower the current to the AWD Solenoid instead of just releasing it fully like OEM. We will only disengage the rear when 2WD mode is active or the Handbrake is pulled.

Question – “you can’t go over 70% rear bias” read somewhere from Fennsport, is this true? Which is something we already get as stock form. My question is, does the 30/70% rear bias using your module would feel significantly different from the stock one? I get you can achieve let’s say 35/65% rear or other torque distributions but I don’t find that appealing unless you can get, let’s say 15/85% rear, which would change the behaviour of the car more significantly.

Answer – We are able to run more RWD bias than the OEM Unit, Litchfield did some testing on their advanced MAHA dyno and was able to get slightly more torque to the rear compared to the OEM unit by raising the current through the solenoid. This is fully adjustable in software and the base map is set so that Track mode has this higher current/duty.

Question – So, to summarise, if it neither increases the rear bias over 70% nor increases the temperature allowed on the clutch pack to avoid limp mode -I’ve read in one of your blog posts you’re keeping the same around 100 degres limit as stock, why would it be worth buying? Apart from increasing safety when going onto FWD.

Answer – As the unit is fully adjustable it allows users the ability to adjust the RWD bias live via Software, OEM buttons or external pots to setup a control strategy to suit the spec of the car. This could be differences in tyre sizes, engine torque curve, temperature limit requirements and much more. Toyota actually use this for their rally builds because of the above.

Estimated dispatch time within 10 working days.

Picture for illustration purposes only. Actual parts may differ slightly in appearance.