[gbalthrop]

Originally Posted by Jonaa24

The car dies randomly, sometimes it dies in 5 seconds then I try to start it again and dies after 20 seconds even a minute, but always dies and no fault codes and the SES light never goes on

Originally Posted by Jonaa24

If you look at this video the Luftmasse, 4 bars below "Terminal 87 never moves and the car is running, does it moves when the engine is running in your car? also when the car dies I heard a clicking sound coming from the JBE at the same time the car dies

We have TWO clues:
1) The MAF Sensor Signal (Luftmasse) should read somewhere in the range of 13 kg/h, kilograms per hour at idle. It shouild increase as you press the throttle and increase RPM. That of course is measuring the mass of air, grams or kilograms of air which pass the Hot Film Air Mass Sensor per second, if units are g/s, or per hour if units are kg/h. So the higher the RPM, the MORE air is drawn into the engine. There are several INPA screens that show DIFFERENT readouts of MAF Signal. The two easiest screens to check are the F1 "Group 1" screen you have attached photo of, and also the F6 "Group 6" Screen which shows MAF signal value in the FIRST bar graph, top-left of the screen, also in kg/h. I attach BOTH of those screens for my 3/2007 N52, each showing value at idle, ~ 660 RPM, to the NEXT post, so as NOT to mess up margins here.

I would suggest checking to see if the connector to your MAF is connected, at the air duct going from the Air Filter Housing to the Throttle Body, located just at rear of Air Filter Housing. If it IS DIS-connected, plug it in and see if there is any change in INPA readout of MAF Value after engine start, and see if it continues to Stall after 15 - 30 seconds. Record the value it is reading if it shows something other than "0". AFAIK, the engine SHOULD run even with the MAF Connector DIS-connected, so try it NOT connected and see if any difference in Stall event.

HOW are you reading Fault Codes? Have you tried INPA > DME > F4 > F1 < F3 Freeze Frame Data? That will give you any Fault Code saved in DME Fault Memory AND all Freeze Frame Data & Details. If you get anything when selecting that screen, other than "Kein Fehler Gefunden" (NO Fault Found), save a ScreenPrint of that screen as a jpg image file and attach it here. It would be a good idea to learn how to save INPA screens as image files in Folders you create to organize example screens, so you can refer to them later to learn what is available and how to test function of various Sensors or Switches (Inputs to a Module), OR Outputs to Motors, Solenoids, etc. (Activations).

2) DME Control Unit Power Supply: I Noticed when viewing your FIRST video, showing the F1 Group 1 PID's, that at 20 Seconds, an Error Message appears stating "NO RESPONSE FROM CONTROL UNIT" which suggests the DME Relay has shut down. If you got a repeated, "ratchet-like" clicking from the JB (Junction Box) Fuse Panel at that point, that would be consistent with DME Main Relay Electromagnet failing to hold the contacts together.

Once the "NO RESPONSE..." message appeared, INPA could no longer read any changed values of any of the Parameters (RPM & KL 87 Voltage remained unchanged). Since we rely on the DME Module to read those parameters, when power is lost to it (when Terminal 87, Relay K6300 malfunctions) we can't see any change in that readout. I didn't think about that in my previous post, and was suggesting you would see Terminal 87 Voltage go to 0. Instead, DME function ceases, NO RESPONSE.." Message appears, and screen freezes on last values reported BEFORE power to DME was lost. Technically, the screen is no longer "Refreshed" or Data Updated.

So check your MAF Sensor Connector, and see if anything different happens when that is changed as far as its current "Connected OR DIS-connected" state. I'll look at the K6300 wiring and F11 power supply wiring to the Crankshaft Sensor & MAF Sensor and see how that relay can be tested or "Hotwired" by applying a ground which the DME is supposed to apply.

You might also see how long the F1 Group 1 INPA Screen will show 12V for the Terminal 87 Voltage with Ignition ON only, NO Engine Start. The idea is to see if that relay cuts out in 15 to 60 seconds just with Ignition ON, same as it does with engine running. Also, listen at the JB (Rear panel of Glovebox removed so you have direct view) to see if you can confirm source of "clicking" when DME Response is Lost.

Finally, If the "NO RESPONSE.." message appears when Viewing F1 Group 1 Screen and engine dies, the SAME should happen when viewing the VANOS Screen, as that is DME-Connection-Dependent as well. The third screen I attached to the earlier post, the EKPS Module F6 Screen, would NOT show that error message when the engine dies due to K6300 shutdown. That Module is NOT powered via the DME Main Relay, so it will continue to furnish current data beyond DME Module shutdown. Check the "Target Flow Rate" and "Target Speed" to see if they "Freeze" when the Engine shuts down.

George

[gbalthrop]

INPA ScreenPrints described in prior post:
1) INPA > DME > F5 > F2 > F1 Measured Values Group 1
2) INPA > DME > F5 > F2 > F6 Measured Values Group 6

Each shows Luftmasse = Air Mass ~ 13kg/h @ idle ~ 660 RPM, N52 engine.

George

[Tunafish]

Log all you can when this happens and post log.

[F31B48]

Have you ever had a fuel pressure gauge on the car whilst it is faulting?
You could try bypassing the EKP and just putting 12v onto the fuel pump. It won't harm the pump, but would rule out the EKP.

[Tunafish]

MHD or Protool for apps.. I am not sure PC software that can log.

[gbalthrop]

Originally Posted by Jonaa24

Hi, update: The car still do the same thing, starts then randomly dies, the mass airflow sensor was bad, I replace it, and now the "Luftmasse" value on INPA reads OK, now I never have a code even with the car running, and when it dies I also have no codes...
Also when I go to the fuel pump module on EKP it gives me that error

I forgot you NEVER reported your findings from doing the Fuel Pump Observation while the engine ran briefly, to see what RPM of pump read. See the THIRD INPA screen I attached to Post #25 in this thread. That screen Menu Sequence is INPA > EKPS > F6 Activation (but you just observe rather than Activate). You COULD activate it and see if it runs longer with DME Control "Over-ridden". BUT, since your INPA version links the INCORRECT SGBD of Fuel Pump Module to the "shortcut" you clicked at the bottom of the Right-hand Listbox, you can't connect to the Fuel Pump Module YET. We can probably fix that, but let's leave that for a later post and try to get the engine to run for > 3 seconds.

It MIGHT be quicker, as EvaBmw says, to "Hotwire" BOTH the Fuel Pump, AND the DME Main Relay. Do NOT do them BOTH at the same time, at least initially, as we want to determine WHERE the fault lies. The good news is INPA is the "Quick" way to "hotwire" your fuel pump, via DME Activation.

I would suggest doing the fuel pump FIRST since you have NOT done that. Before you take anything apart to physically apply a "Power Jumper" to the Fuel Pump, try using the Fuel Pump Activation THROUGH CONNECTION WITH DME. Keep in mind that the Pump operation is controlled by the EKPS Module, and the DME in turn controls EKPS function. You can actually Activate the EKP via the DME F6 Activation. You do NOT need to connect directly to the EKPS Fuel Pump Module as shown in my 3rd screen on Post #25. Menu Sequence or "Path" to do that is:
INPA > DME > F6 Activations > F1 > F7 Control EKP.

The resulting INPA Screen should look like the one attached to the NEXT post. Simply press F1 to turn the pump on, and you can monitor Pump % of max speed in the bar graph. F2 turns pump off (if you wanted to do compression test, etc.), and F4 Returns normal control to DME.

Try that and let us know what you find. If still NO Joy, we can suggest how to "Hotwire" the DME Main Relay. Please do NOT replace any parts or take anything else apart (adding NEW variables) until testing is completed.

George

[gbalthrop]

Here is the INPA Screen related to Activation of the EKP (Fuel Pump) via connection to DME
AS discussed in Prior post in this thread.

George

[Tunafish]

Your DME voltage is low when cars not running 11.9v would take care of battery or connections before anything else.

[gbalthrop]

Originally Posted by Jonaa24

I already tried to activate the fuel pump via INPA pressing F1, and everything reads OK, the pump never stop before the engine dies.

Originally Posted by Jonaa24

How can I do hotwire to the DME main relay?

1) My best SWAG is, as stated in "CLUE #2" in Post #30 above, when the "NO RESPONSE FROM CONTROL UNIT" Error Message appeared at the 20-second mark of your FIRST video, Measured Values 1, in Post #28, and the "Refresh" of Values such as RPM & Voltage CEASES, that suggests the DME Main Relay or power supply to the DME Module ceased at that point. You said in Post #32 that "the circuit 87 is always there". I'm NOT trying to "pick Nits", but it is NOT there when there is NO RESPONSE FROM CONTROL UNIT.

There are TWO essential fuses powered by the DME Main Relay:
F37 which in turn powers the DME, Camshaft Sensors & other Components;
F39 which powers the Coils & Injectors.

Rather than "Hotwire" the DME Main Relay (K6300), since it is soldered into the Junction Box Circuit Board, it is easier to simply Measure Voltage at Either/Both F37 & F39 and see if Voltage drops to zero or nearly so when engine dies. That will confirm that the KL87 (DME) Relay is going "open circuit" or contacts opening when it should NOT, causing engine to die. If relay ceases to be "Activated", intermittent ground signal via White/Gray wire from DME to X6011/5, and then via Red/Gray wire to X11010/1, which activates K6300 DME Main Relay Electromagnet is next thing to check before replacing Relay which is soldered into JB.

Attached to NEXT post are the following for 2008 & Later N52 E9x:
1) Supply, DME Control Unit Wiring Diagram with K6300 Installation Location;
2) F37 Circuit;
3) F39 Circuit with Fuse Layout/Location;
4) Supply, DME, with X11010 Ground for Relay Electromagnet Location on JB;
5) X11010 Connector View, Pin #1 is Electromagnet Ground;
6) X6011 Intermediate Connector Location in E-box;
7) X6011 Connector View; Pins #5 & #10 = Ground & KL30 supply respectively.

George

[gbalthrop]

Attached are the following for 2008 & Later N52 E9x, as describe in prior post:
1) Supply, DME Control Unit Wiring Diagram with K6300 Installation Location;
2) F37 Circuit;
3) F39 Circuit with Fuse Layout/Location;
4) Supply, DME, with X11010 Ground for Relay Electromagnet Location on JB;
5) X11010 Connector View, Pin #1 is Electromagnet Ground;
6) X6011 Intermediate Connector Location in E-box;
7) X6011 Connector View; Pins #5 & #10 = Ground & KL30 supply respectively.

George

[gbalthrop]

Originally Posted by Jonaa24

I found the wire that lost power before the engine dies, is the White/Gray wire from DME to X6011/5 and Red/Gray wire to X11010/1 which are the same wires. I guess the relay is going off

That White/Gray wire from DME X60005/13 (Pin#13 of Connector X60005 at the DME) to X6011/5 (Pin#5 of Connector X6011 in the E-box) supplies a GROUND to the DME Main Relay Electromagnet which activates that relay. If the Ground Signal from the DME (X60005/13) is lost, the relay goes "Open Contacts" and Main Power to the DME is Lost, along with power to essential Sensors such as Crankshaft & Camshaft, and Fuel Pump Activation.

See the First ISTA ScreenPrint attached to Post #44 above for the circuit described in this post:
https://www.e90post.com/forums/showp...8&postcount=44

If you Understand the electrical circuit, you can do one further test to determine that the CAUSE of the DME Main Relay NOT continuing to power the circuits described is (1) Lack of Ground signal to the Relay from the DME, OR (2) If the Relay itself is faulty:

0) If you can remove the White/Gray wire from X6011/5, do that so the DME Activation of K6300 circuit is isolated from the K6300 Relay (DME Main Relay);

1) Apply a Temporary ground (using a "patchcord"/Jumper with alligator clips or proper spade end) to apply a ground to X6011/5 in the E-box. I assume THAT is where you attached the multimeter shown in your video? That Patchcord will act as a supplemental ground so that the DME Main Relay is activated whenever KL87 is active (while Ignition is ON and shortly AFTER Ignition OFF).

2) Do NOT leave that jumper attached for longer than ~ 10 minutes of testing or less;

3) WITH that jumper in place, Start engine, and if it starts and runs normally, allow it to idle for up to 10 minutes. If it continues to run normally, turn engine off, remove jumper, and let us know result. We can suggest Next Steps.

Be aware that there have been multiple instances, reported on the Forums, of corrosion at X60005/13, broken Pin#13, PCB (Printed Circuit Board) damage at Pin#13, etc., so if relay STAYS closed (NO clicking or power loss) during 10 minutes of operation with Jumper in place, the next step will be to access that connector or remove that DME Module for inspection or repair. I have NOT even had to open my E-box, so information I provide is based ONLY on reports by others, photos, or ISTA/TIS diagrams.

George