2004 BMW X5 4.4 No start

[Witsend]

Turns out the problem was a bad fuel pump but Generic Scan tool pulled a generic OBD code P0370 Timing reference high resolution circuit A, and the code from DME a 2780. In a well known Auto Repair software there are 30 different charts of codes to sift through and a quick search bar and it couldn't find either code. Got to be an easier way
I just went to rock auto site and looked up crankshaft sensor to see an image , googled the location on the car , tried to do a component test with scope. Unfortunately the location and sealed off connector did not lend itself to back probing the wires. Took the crankshaft sensor off vehicle and measured OL , got a new $68 sensor , it too measured pretty high in mega ohms, put it on anyway, still didn't start and then proceeded to remove engine cover to check fuel pressure and diagnos fuel pump as cause of the no start. at least a easy pump to get to under the rear seat

[greasybob]

it's a hall effect sensor ? Don't know of a resistance test for one, signature only. Voltage and ground (low ref) too I guess. Was there a RPM data PID ?

[Crusty]

Makes me wonder if you had followed the much touted GFF (Guided Fault Finding) in the OE scan tool, how long it would have taken to get to the fuel pump from the crank sensor code-!!

Way to go-!! You used the FUNDAMENTALS and found a bad fuel pump. Car runs.

As for the crank sensor itself, if the vehicle was starving for fuel and the engine was surging, it may have set the failure code because of a cavitating fuel pump.

So there is an extra 68 bananas for a new sensor. Peanuts compared to what a dealer would have charged for the problem (no start).

Bob is right on ohm testing the sensor. Not all of them can be "bench tested" without some jury rigging for feed, ground, signal, and then some way to 'trigger" the sensor.

I'm over it. The car runs.
FUNDAMENTALS-!! Good work in my book-!!!

"Volts, ohms, and amps, don't care if you have to put a box on your head, or squint real hard, because you're working on a german vehicle or an Asian vehicle".
(Quote from my mentor back in the 1970's-!!!)
(He was VERY Japanese with squinty eyes himself-!! LMAO-!!)

[Witsend]

I saw engine rpm cranking , but figured the Tuetonic engineering in DME module could still give me an rpm value off a CMP sensor x 2.Thought I heard the the darn fuel pump humming back there the entire time I was auto scanning the vehicle , but after I pulled the engine cover and got no fuel pressure , I found humming sound just like a fuel pump was coming from the Right rear door speaker because the owner moved his Subwoofer boxes forward so I could access the rear compartment , in case I had to access the battery and the speaker wires were touching each other. I had to move the subs back to access beneath the rear seat.

Got another real Turd , an AWD Ford Edge I need to change a rear hub that I might try to grind modify a Port Cargo T-60 torx , but I will definately apply some heat around ears of hub to try and reduce the torque required to attempt breaking midwest corroded bolts free with a modified weakened Chinese tool. Start vid at about the 11minute mark of the you tube vid. Seems like an idea worth trying

https://www.youtube.com/watch?v=nni4miagmps

[greasybob]

I modified my snappy T60 for this. Gotta remove a little meat to make it fit. Then use a skinny socket to drive it The newer Edge is much easier.