Crankshaft and camshaft wiring for standalone HELP

[bossco477]

Hello everyone,

I am installing a Haltech platinum sport 1000 on my 318 is. So far everything has gone well except for the crank and cam sensors.

I am confused about how to wire them. Initially, while the stock ecu was plugged in I measured with a multimeter the output from the main wiring harness to the sensors. I found that for the crank pin 1 is a positive 5v, pin 3 is a ground and pin 2 (I assumed) is a signal. In other words I set it up like a hall effect sensor.

Doing some research I found that the camshaft sensor is a VR (variable-reluctance) sensor.

Now, on the camshaft I did the same thing and found a constant voltage through the two outer pins but in this case it was extremely low in the order of milivolts

From what I underestand a reluctance sensor only needs a positive and a negative.

My questions are:

1. Which two pins should I use for the crank and the cam assuming they are both reluctors?

2. Do the ignition coils have igniters built in?

Thank you in advance and I would appreciate if you have any advice or any other notes I should be aware of

[Boyracer]

What year is your 318is? I think there has been 3 different M42 revisions and also M44 engines installed during years. M42 have two VR sensors I think and M44 had one or two Hall effect sensors so it matters.

1993-1995 M42 sensors have yellow and black wires for signal.

1996-1997 camshaft sensor has yellow and yellow or red/white wires for signal.

M42/M44 coils do not have internal igniters.

[romkasponka]

You can use igniteers from new like E90 models with little enlarged diameter in cylinder head cover.