Steering, Throttle, CAN, Brake Switch Harness Integration - cotos/OSCC GitHub Wiki

Steering Control Integration - Electrical Harness

FIG 1.1 - Kia Steering EPAS ECU - Column Torque Sensors

Above is an image of the Kia factory EPAS ECU / Torque sensor harness illustrating the blue and green wires cut with butt splices in place ready for extending the wires to the OSCC Steering Sensor Interface board.

NOTE: To remove the EPAS ECU connector, there is a blue locking wedge that must be removed to allow depressing the lock tab. Additionally this factory harness is wrapped in a yellow plastic sheathing which was removed and replaced with split-loom in this instance

The schematic below details the splices and wire color extensions from the steering and throttle for sensor board integration. By doing this, the OSCC modules are inserted between the sensors and the ECU allowing for setting voltages and gaining vehicle control.

In summary, the steering integration simply consists of the following 5 steps:

• Locate factory EPAS ECU / Torque sensor harness

• Cut the Blue and Green signal wires and apply 4 butt splices (per Fig 1.1)

• Extend each wire with the appropriate wire color

• Install 8 pin Deutsch connector inline at desired point in glove box

• Connect to OSCC sensor controller interface boards

NOTE: Ultimately it makes most sense to do this work alongside integrating throttle controls, and Vehicle CAN as they end up in one logically routed harness, but are listed separately to simplify understanding.

The finished harness is shown below, connecting