The Z3 Diagnostics Thread: Instructions, Experiences, Discussions, Experimentation

[me77]

I thought if the EWS does not recognize the key, nothing happens when you turn the key to start? (no starter spinning, just dashboard lights and that's it)

[mcassict]

No when I turn the key, the engine is turning over but not displaying any RPMs.

[328 Power 04]

No when I turn the key, the engine is turning over but not displaying any RPMs.

No rpm usually hints towards the crankshaft position sensor signal.

Did you use an aftermarket sensor? For crank and cam sensors, you should only use BMW original or Bosch/Siemens VDO only. The aftermarket suppliers just can't seem to get that sensor right. You'll go through multiple new ones before you get one that works. Well recognized issue.

[mcassict]

Yes both camshaft sensors and the crankshaft sensor I replaced came from Autozone. The camshaft sensors I did return and installed a second set thinking that a possibility. I have only tried the one crankshaft sensor.


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[FHLH]

Thanks again to this thread I was able to reset my SRS lights. The products I purchased below did indeed work.

Here are the links again:

LZLRUN INPA K+CAN K+DCAN Car Diagnostic Tool Cable OBD USB Interface for BMW with FT232RL NCS Coding Winkfp Tool32 Programing
by LZLRUN(Fang fei) Learn more: https://www.amazon.com/dp/B017IG81SQ..._Oc4RCb0K7HK71 and AntiBreak 20 Pin OBD OBD2 16 Pin Connector 20PIN OBD to 16PIN Diagnostic Adapter Cable Female Adapter Connector Cable 20 Pin E31 E32 E34 E36 E39 E38 E53 X 5 Z3
by AntiBreak Learn more: https://www.amazon.com/dp/B07D8RQWKL..._Rd4RCbD5H36FW

Thanks - Jason




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[328 Power 04]

Yes both camshaft sensors and the crankshaft sensor I replaced came from Autozone. The camshaft sensors I did return and installed a second set thinking that a possibility. I have only tried the one crankshaft sensor.


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The engine will run with bad camshaft position sensor signal, but will not run with a bad crankshaft position sensor signal.
Does your obd2 device read rpm signal from the ECU? You can use that to see if it's bad.


Of course this may still be other things, so let us know when you have codes from ews and dme.

[mcassict]

No rpm usually hints towards the crankshaft position sensor signal.

Did you use an aftermarket sensor? For crank and cam sensors, you should only use BMW original or Bosch/Siemens VDO only. The aftermarket suppliers just can't seem to get that sensor right. You'll go through multiple new ones before you get one that works. Well recognized issue.

OK so I have just finished installing INPA and getting ready to roll for the first time....wish me luck!

[mcassict]

Well not getting past selecting the engine for some reason. I tried script MS42 and then MS41.1.....


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[mcassict]

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[mcassict]

Well while I haven’t gotten it to accept the engine parameter I did get to the EWS and this is what has popped up....




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[mcassict]

Well I think I have hit a brick wall yet again.... the only thing I have been able to access are the EWS memory and the Thermal Oil Level Sensor.....Everything else is giving me some type of connection error and I cant tell if it is a cable issue or I am just giving it the wrong selections in regard to engine and transmission

[mcassict]

Progress! Ok so what I ended up doing is disconnecting from under the hood and tried the OBDII port in the console and was able to connect and access the engine codes.... not sure what to do from here with this info but excited to be heading in the right direction!





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[mcassict]

Another quick update...I did try the Shift+F6 and reset of the EWS but ended up with a communication error. Basically what I am noticing is that from the interior OBDII port I can access the Engine parameters but not the EWS. And from the connection point under the hood it’s just the opposite; I can access EWS but not the Engine....that seems odd to me.


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[mcassict]

One of the late night sessions at ZFest last weekend was configuring a recalcitrant INPA installation. We finally traced the issue to the 16-20 pin adapter. I finally got a chance to look at the "bad" adapter. Turns out TxD2 isn't wired up at all. Since this particular installation was from an eastern European country, I'm guessing they used an adapter that didn't take the US-centric TxD2 line into consideration.

So if you have an installation that gives an error 0009 with the 20pin, but connects to the DME okay with the 16 pin, open the adapter and bridge pin 17 to 20.

Could this be why I am having issues? Able to connect with Engine from 16 pin but not 20 pin, and able to connect to EWS with 20 pin but not 16 pin...

[328 Power 04]

Good progress.
You normally should be able to access everything from under the hood. Make sure you have your OBD port cap in place when you diag under the hood. Also, make sure that you have your cable's latency set to 1 or 2ms instead of the default 16ms in Device Manager.

At the 20-pin port you should have access to all modules, and at OBD you can access only engine. That is normal operation.

You need to do the ews reset rolling codes (on the MS42 dme) at the 20-pin port, because it accesses the ews module as well to do that procedure.

[mcassict]

Success!!! Jumped the 17 & 20 pins, was able to access DME and reset EWS and car started right up!!!


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[328 Power 04]

Awesome!
Now make sure your 2 camshaft position sensors are good, and you have a small leak in the fuel tank pressurizing system.

[mcassict]

Thank you so much for all of the help! I can’t tell you how much I appreciate it. Now to clear the codes and off to the races! Thanks again!!! (By the way while I did get that BMW Original Crankshaft Position Sensor in today from Pelican, I haven’t installed it. It’s running on the aftermarket sensors I put in and resetting the EWS was all it took. I will be swapping out soon though just to make sure we are putting the best in)


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[mcassict]

Awesome!
Now make sure your 2 camshaft position sensors are good, and you have a small leak in the fuel tank pressurizing system.

What Would be the best way to go about finding the leak?


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[mcassict]

Well I’ve taken her out for a couple drives totaling about 12 miles and she seems to be running well. CEL did pop on expectedly but not with the code I assumed it would.....


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[mcassict]

Well damn.... took it out again and once she warmed up she got real shaky and boggy on the highway. Hooked INPA up again when I got home and pulled 104, 238, 242, 240, 243, 239, 241, & 106


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[mcassict]

OK so Im trying to figure out these 104 and 106 codes. In the INPA description it identifies: "control-VANOS end position outlet-camshaft", which I thought was just the camshaft sensors. Yet in another website Ive found describing the VANOS system, it says:

• P1520 (BMW 104, 0x68): B (exhaust) Camshaft Position Actuator (faulty reference value).
• P1523 (BMW 106, 0x6A): B (exhaust) Camshaft Position Actuator Tight or Jammed (mechanically stuck).

Im not sure what "actuator" is. Is that indeed the sensor or is there another part of the VANOS system I am unaware of? This wouldn't be talking about the solenoids would it?

[328 Power 04]

I wonder if anyone messed with the timing on that car?
Or maybe the actuators are failing?

In the MS42 dme section, there are analog values for the vanos position. Requested and actual. That may give you a good clue.

[mcassict]

OK Ill hook up and run those to see....

[mcassict]

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