Checked with Race Technology and found that when I use the vehicle speed from the ECU via the CAN bus the speed is displayed on the dash but will not increment the odometer. As this is required for IVA I now need to fit a wheel speed sensor and wire it back to the dash. The proximity sensor has 3 wires 5v, ground and a signal wire. This type of sensor does not need a magnet and will operate when it is close to a bolt head or toothed wheel. Decided to fit the sensor on the back of the rear hub so that I could conceal the wiring.
Needed to make a bracket to fit to the rear hub, made an initial template from card and then fabricated from a strip of aluminium. Fitted to the rear hub and then used the wheel studs for the signal. Adjusted the gap and tested. Once the sensor is powered up there is a red LED on the back that is lit and then switches off when it senses the stud.
Once wired into the dash I calculated how many pulses per mile to enter in to the config.
The calculation is inches in a mile divided by wheel circumference in inches multiplied by pulses in one revolution of the wheel (4 studs).
Calc is : 63360 / 72 then multiplied by 4 = 3520
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