Camshaft position sensor?

Broken850 · Post by **Broken850** » 30 Dec 2010, 13:26

Hi experts! Where is the cam position sensor located on a 94 850 turbo, and how do I test it once I find it? Thank you for any info!

Post by **Ozark Lee** » 30 Dec 2010, 18:18

The camshaft position sensor is on the (USA) drivers side of the block behind the exhaust cam shaft - more or less directly next to the distributor horizontally.

There are some ohmmeter tests but I need to boot up a Windows partition (Major deal with my Linux network) to get to VADIS to tell you what the actual readings should be. A dead short is a bad thing and would certainly indicate a bad sensor.

If you don't have an answer in the next day or so bump the thread and I will shut down the network and try to get you your answer.

...Lee

FCPEURO · Post by **FCPEURO** » 30 Dec 2010, 18:55

Lee is right on the location, as for checking if it is working, if the signal coming from the sensor never changes, it is bad.

Broken850 · Post by **Broken850** » 31 Dec 2010, 09:59

Thanks for the info. Gonna go find and throw an ohm meter on it....

Post by **jimmy57** » 31 Dec 2010, 13:19

Ohmmeter won't help you. Voltmeter is your tool.
The CPS has a three wire connector.
Black is ground, red is power supply of 12 +/- volts, and the blue is signal wire.
If you back probe the blue wire you will have a 5V or 0V reading if it working. Bump over engine and you should see it go 5V and then 0V with each period of the two voltages lasting one crank revolution. Backprobing for the reading is easy on the harness connector side by use of a T pin (floral arrangements and craft uses) or a straightened paper clip slid down through the rubber seal around wire in the back side of connector.
This is the procedure that works for all 960/s90/v90 and for 850/s70/v70/c70/xc70 through 1998 model year. The 99 and later use a different technology sensor and a different reluctor and give a different signal.

The connector for the CPS can crack on either the harness or CPS side and that may be your problem. The sensors are fairly bulletproof.