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Oct 13

Wiring Harness

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One Response to “Wiring Harness”

1. # rabidhummingbirdon 21 Oct 2010 at 7:18 am

   CAN is being used in most of the automotive industry because it allows all of the controllers to share signals and reduces size, weight, and complexity of wiring harnesses. Frothy had a good explanation. Generally a car will have a Master Vehicle Controller, and then sub components will have satellite controllers. Sub-components range from Engine Control Module, to the Body control Module, to a battery controller. For the most part all controllers see all messages but just pick out the ones they need. They do this by using the message IDs frothy mentioned. Each message has a couple different parts one being the ID another the message and i think some other informative bits. Put very simply, you’ll need to read in a peddle position and convert that to a torque or power demand for the motor and send that over CAN to the controller. You’ll need to get the pin out of the connector to the controller as well as find out the type of connector it uses. Also ask for the .dbc file as this is the CAN database used by the controller and will give you message ids and other information about the signals the motor will look for as well as signals it will send out (such as temp, rpm or other diagnostics). I wasn’t directly involved with the controls but I helped on a similar project and i know we used Motohawk/MotoTron controllers and their Vector CANcase tools to set up the network. sorry this is a little scatter brained but hope it helps a bit.