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VISIÓN GENERAL

MoTeC’s Subaru Diff Controller (SDC) is suitable for Subaru WRX and STi vehicles. It is a plug-in replacement for the factory fitted Driver Controlled Centre Diff (DCCD) controller, fitting into the OEM box that is bolted to the steering column underneath the dashboard.

Functionality

The SDC unit is used to adjust the torque split between the front and rear differentials to achieve greater control over handling characteristics such as traction, braking on loose surfaces, turn in response, and understeer on both corner entry and exit.

The centre differential is essentially a limited slip differential with adjustable preload. The SDC works by regulating solenoid current, which is proportional to the preload. When no current is applied (0% lock) the centre differential operates as an ‘open diff’ with a mechanical torque distribution of 65% rear and 35% front (60% and 40% in some vehicles). With increasing current (increasing percentage lock) the preload increases, requiring more torque difference between front and rear wheels before the centre differential will slip.

There are six selectable control modes: 0% lock, 100% lock and four user-configurable modes. These modes can be selected using the DCCD thumb wheel.

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ESPECIFICACIONES BASICAS

Connector

• 2 x 24 pin connectors fitting directly into the factory wiring

Communications

• 1 x CAN
• 1 x RS232

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COMPATIBILIDAD

MoTeC’s Subaru Diff Controller (SDC3 #14015) is suitable for:

• WRX 2008 – On
• STi 2008 – On

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CARACTERISTICAS

• 6 x Selectable control modes:
  • 1 x 0% lock mode
  • 4 x user-defined modes
  • 1 x 100% lock mode
• Control modes can be selected using the DCCD thumbwheel.
• Each mode is configurable with an acceleration table, braking table and desired slip table.
• The percentage lock can be configured using vehicle speed and throttle position. With the MoTeC M800 Plug-In ECU connected, engine efficiency point can be used instead of throttle position. The ECU will calculate and then send the efficiency point to the SDC2 or SDC3. This feature uses the factory wiring loom.
• With the RS232 serial communications configured, the SDC2 or SDC3 can send wheel speeds, lateral G-force, longitudinal G-force, steering position, diff parameter and fault codes to the MoTeC M800 Plug-In ECU without the need for additional sensors.
• The CAN interface optionally transmits the sensor and diagnostic information to a MoTeC Dash Logger.
• Handbrake override.

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ACESORIOS

For configuration and upgrading of firmware connect to a laptop using the MoTeC UTC (USB To CAN) adaptor.

• 61059 – UTC – USB TO CAN PLUS CABLE

MANUAL

Name	Version / Part	Published	Download
SDC3 User Manual	14015	jun 2008	DOWNLOAD