Airbag

Good luck . make sure you read the link i posted .
Looks like someone had a very similar issue to yours . Seems his timing ws off so the ecu didnt see the signal when it expected it or not at the right value so flagged a message of implausable signal

implausable signal basically means an out of range signal according to the ross rtech site.

Anyway good luck and post back what you find.

jcman

Ok I just read your post on Audizine and I'm wondering when you did your TB service if you set the cam timing with the castle tip socket?

Even though I think an implausible signal is a sporadic or choppy "not complete" signal it could be possible that the timing is out, it seems there are other codes suggesting off timing values.

Crank pin, cam locks and the very special socket are always required for cam timing adjustment on a 3.0, anything less is a crap shoot into hell.

xdewaynex

Yea, the last 2 times, I removed the belt and reinstalled it, I used the special socket for the cams. When I first done it, I wasnt aware of, and Ive even been told that its not really necessary.

xdewaynex

Copied from Audizine:

Finally got a break in the weather, so I went outside a bit ago, and done the tests that were mentioned above. First I checked the 3 pins on the cam sensors and brake booster sensor, with the ignition on. Pin 3 on all sensors gave me a negative reading when I touched the positive battery post as mentioned above.

G301 (upper passenger sensor) Pin 1: 4.6v Pin 2: 10.7v Pin 3: -12v
G300 (lower passenger sensor) Pin 1: 4.3v Pin 2: 10.4v Pin 3: -12v
G40 (lower driver sensor) Pin 1: 5v Pin 2: 10.7v Pin 3: -8v
G163 (upper driver sensor) Pin 1: 5v Pin 2: 10.7v Pin 3: -7v

Like I said, Im not sure if I was suppose to be getting a negative reading for pin 3.

Now on to the pins of the sensors to the pins on the ecu.

Pin 1 to pin 98 and Pin 3 to pin 108 all checked out fine. Now Pin 2 is where I ran into a problem. Pin 2 on G301 and G40, I was not getting a signal back. Pin 2 on G163 and G300, I was getting a good signal back. I also tried starting the car with the brake booster sensor unplugged and it didnt change anything.

jcman

G301 pin 2 should be Green/White and goes to #54 harness to the ecu, G40 pin 2 should be Yellow/Black and goes to #87 ecu.

That is a problem for sure because even the pdf's show a direct path on both pins.

Good luck! Hope you figure it out.

xdewaynex

I think you meant 87 and not 97. But yea, Im not sure what to do at this point, or even how that signal of just those 2 sensors got messed up, from the time I pulled the engine and reinstalled it.

xdewaynex

One thing I dont understand, is why Im not getting a reading for pin 2 and the ecu connection pins 87 and 54, but I got a voltage reading at pin 2 when the battery and ecu was connected.

jcman

Oops! My bad 87 is right.

jcman

Not sure about that, are you checking continuity between pin 2 and the perspective 54 and 87 points?

xdewaynex

So I went back outside yesterday to retrace the 2 pin connectors that I wasnt receiving a signal for. Im still getting the same results. Im wondering if its possible to run new wires for those 2 pins or use quick splices and see if that helps anything. I was also thinking of testing the passenger side pin to the ecu pin for the driver side connector, just to see if something maybe got switch. Just tossing ideas, as Im at another stand still.