
SDC3 Subaru Diff Controller User Manual © Copyright – MoTeC Pty Ltd – 2001-2008 The information in this document is subject
MoTeC SDC3 8 Setup SDC Manager The SDC Manager software is necessary to configure an SDC3 unit from a PC. A new SDC3 unit must be configured before
MoTeC SDC3 9 Setup The Braking table is used to generate the %lock when the foot brake is applied, and is an override table for the Acceleration ta
MoTeC SDC3 10 Setup Speed Sensor For Wheel Speed speed measurement method. Hall/Magnetic: If the speed sensor type is hall effect (or equivalent),
MoTeC SDC3 11 Setup The width of the diff control pulses varies linearly with the desired diff lock, from Min Pulse Width at 0% lock to Max Pulse W
MoTeC SDC3 12 Setup Monitoring SDC3 Data Live data from a connected SDC3 may be monitored using the File | Monitor Channels option (or the ‘M’ hot
MoTeC SDC3 13 Appendices SDC3 Installation The factory centre diff controller box is located on the passenger side behind the glove box. A standar
MoTeC SDC3 14 Appendices Appendices Appendix A – Fault Codes The SDC3 fault flags included in the CAN diagnostics are sent as a bit field (16 bit)
MoTeC SDC3 15 Appendices Appendix B – SDC3 Pinout and Links SDC3 Connector Pinout Pin Function Notes 1 Not connected 2 CAN-HI 3 Not connect
MoTeC SDC3 16 Appendices 30 Battery- input 31 Battery- input 32 Diff drive- output Solenoid negative (switched) Links The only user changeabl
MoTeC SDC3 17 Appendices Appendix C – CAN Wiring Practices NOTE! The factory CAN bus in the STi is already terminated. This information is provided
Contents Introduction...1SDC3 Functionality...
MoTeC SDC3 18 Appendices Appendix D – Removing ABS systems Details of ABS removal will be provided in a future version of this manual.
MoTeC SDC3 19 Appendices Appendix E – ECU Communications The SDC3 can communicate with the MoTeC WRX V910 OEM ECU using the factory CAN bus. Receiv
MoTeC SDC3 20 Appendices Receiving ECU Data If present, the WRX V910 OEM ECU must be configured to transmit throttle position (and optionally m
MoTeC SDC3 21 Appendices Appendix F – CAN Messages SDC3 operational data messages are each transmitted at 50Hz. SDC3 diagnostic messages are each t
MoTeC SDC3 22 Appendices CAN ID 0x1F4 Byte Bits Data 0 Compound Id = 4 1 Throttle Position (1% resolution) 2 3 Diff control duty cycle (0.1% res
MoTeC SDC3 1 Introduction Introduction The Subaru Diff Controller 3 (SDC3) is a direct replacement for the Driver Controlled Centre Diff (DCCD) con
MoTeC SDC3 2 Functionality SDC3 Functionality Mode selection There are six user selectable control modes, four of which are user configurable. The
MoTeC SDC3 3 Functionality Lock Calculation Lock percentage applied to the centre diff is determined primarily by the vehicle speed, throttle posit
MoTeC SDC3 4 Functionality Slip Control The slip control strategy detects slip (i.e.: rear speed ≠ front speed) and increases diff lock to maintain
MoTeC SDC3 5 Functionality Speed Measurement The SDC3 can be configured to use one of two different methods to measure wheel speeds: ABS CAN (Defau
MoTeC SDC3 6 Functionality Throttle Calibration The throttle position sensor input can be calibrated using a table to convert voltage to throttle
MoTeC SDC3 7 Functionality For information on configuring the diff temperature override, see Setup | User Modes in the SDC Manager section. Fault
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