XM Crank Position Sensor

[pj3107]

Hi Everyone
Looking for assistance on where to find the CPS on my 97 S2 XM 3.0 V6 12v
Have been told it's under the throttle body ? ? ?
If anyone has any experience in changing one I would be glad of any pointers/advice/pics
Thanks
PJ

[Dieselman]

It is indeed under the throttle body.
Find the 3 pin brown connector and follow the lead down.

From memory, the nominal resistance is 330 Ohm and if you connect an AC voltmeter then crank the engine you should see it output a small voltage.

Can you not see the Cps output on your Lexia?

If you connect a low wattage test lamp between coil negative (trigger) and Gnd, you should see the amplifier triggering the coil. If so, the Cps is sending a signal to the Ecu, which is actuating the amplifier.
It could still be the timing is random, due to a failing Cps.
It would also be worth checking fuel pressure as that will also influence the ability to run.

See the non-running Jaguar thread for an insight.
viewtopic.php?f=2&t
The Jag uses a crank sensor for timing and a separate flywheel sensor for engine speed, allied to one Ecu for ignition and another for fuel, but the basic system principles are the same as yours.

Also see the V6-24 thread that did have a duff Cps.
viewtopic.php?f=19&t=8535
I probably need to rebuild the images for you.
The V6-24 uses a crank and cam sensor due to having sequential injection, whereas the 12v only has a crank sensor as the injectors are batch fired.

The Fenix3 Prv6 information is in the Engine management information thread.
viewtopic.php?f=13&t=10588