MoTeC Global Forum

Hello,

I have four wheel speed sensors and a crankshaft sensor. All of them are reluctor.

The wheel speed +ve signals are connected Universal Digital 9,10,11 and 12. What do I connect the -ve wires too ?

The crankshaft sensor I have +ve connected to Universal Digital 1. What do I connect -ve too ?

Ray.

Hi Ray,

The -ve pins can be connected to any of the 0V supplies (pins A26, A27, A33, A34, D15 and D16). I try to wire like sensors to the same 0V supply where possible, so I would have all of the rotational sensors on the same supply, and the pressure sensors on a different on.

The Temp sensors need to be wired according to the Help for the AT inputs, where AT1 and AT1 are internally connected to the 5V+A supply, AT3 and AT4 are to the 5V+B and AT5 and AT6 are connected to 5V+C. The need to be wired to the matching 0V supply.

Stephen,

Thank you.

Ray.

SDean wrote: I try to wire like sensors to the same 0V supply where possible, so I would have all of the rotational sensors on the same supply, and the pressure sensors on a different on.

Stephen; just out of curiosity what's the rationale for this? My preference has been to group sensors by critical/non-critical so a fault on a non-critical sensor (hopefully) can't effect the supply for critical sensors, but I'm always interested to hear other ideas.

More of a personal preference to be honest, I find that it can make fault finding easier as I know that it is only one kind of sensor using the shared 5V/0V supplies.

As long as the correct Voltage References are applied (where relevant) then it doesn't make a difference to the operation of the ECU as to which are used, as long as the supply isn't overloaded.