[Tiberius]

According to the FSM, both the crankcase position sensor and the camshaft position sensors are hall effect style pickups. Point is... I'm not sure there is any real validity to measuring the resistance across the sensor. I'm no hall effect expert, and I'm sure you could potentially tell if one is dead shorted dead. But other than that, I'm not sure there is anything to be gleaned from a simple resistance measurement. It's not like taking a resistance measurement across a variable reluctance coil type pickup.

Are you able to put a scope on the outputs while the engine is running? You should see a squarewave output from both of those sensors.

I've never done it and I'm just tossing out ideas, but maybe I can at least get a conversation started?

 

[Tiberius]

I would guess that the problem is not in the phaser itself, but in one of the related components around it or the connections between them. In other words, I expect the root problem is with one of the following (or the wiring or connectors making contact to one of the following):

Crankshaft position sensor
Cam position sensor
Oil control valve
Oil temp sensor

My wild asss guess without being there is that you have an intermittent electrical connection issue to one of those items.

 

[Tiberius]

Well I'm not sure how much help I'm being, but here's to hoping it's something as simple as that! Certainly a failure of the OCV (or a failure to be able to send it control signals) would be a likely culprit for setting any sort of cam timing error code.

Do you have any real time data display or collection abilities? Can you see what the cam sensor output is doing?

 

[Tiberius]

I tested the Camshaft position sensor @ 800 rpms and had a steady input of about 4.9V which I believe is with in specs 0-5 volts?

I'm operating only on what I can glean from the service manual, but I don't think it works that way... The sensor has three pins:

A) Power - This should be 12V when measured to engine block.
B) Ground - This should be 0V when measured to engine block and zero Ohms to the block when checked on the resistance scale
C) Sensor output - This should have a five volt tall square wave on it when the engine is running. The frequency of the square wave will vary with RPM.

You can't measure the output of the CMPS with a DVM unless it has a frequency input scale. If you've got a steady 4.9V out of the CMPS while the engine is running, then that's a problem.