S52 E34 OBD1 Not getting any trigger signal

[omar.harmoush]

5 minutes ago, Adamw said:

I only have good solid info for the E36 with M50TUB25, in that car at least the manual/auto pinout is the same and the Link ECU works in either.

As mentioned in my earlier post all wiring diagrams I can find for a E34 525 show the M3.1 pinout so I dont know what your car has. 

My car was M3.3.1 with the Bosch red label 413. Thats exactly what an M50TU E36 has in it. So i completely doubt that the pinout is different. I was able to run it with a megasquirt 3pro pnp which is specificly for M50TU/S50 E34 and E36 manual so i really really dont think the issue is with the pinout.

http://www.wedophones.com/Manuals/BMW/1993 BMW 525i - 525it - 535i - M5 Electrical Troubleshooting Manual.pdf

On page 148 it shows the pinout for my car. Its the exact same pinout as the Link ecu and the E36 M3.3.1 so i really believe that this issue is either with my ECU or with the software or something.

[cj]

You could verify the pinout by checking continuity between the crank sensor pins (unplug the crank sensor) and pin 17 & 43 or whatever it should be at the ecu connector end, and then do the same to the sensor ground & signal wires from the cam sensor (ECU unplugged as well - test at the connector). To test the 12v signal, plug in the ECU but unplug the cam sensor, then with key on, check for 12v on the pin you didnt find as cam or sensor ground. The 12v to the cam sensor may have been verified by your OEM ecu swap test, but its worth checking excplicty as some time OEMs can swap over to batch fire+waste spark mode if there is no cam signal and you wouldnt really know.

[Fotis]

All you can do now, is to re-pin, get a multimeter set it to continuity. I.e find the ground-signal pin from your connector up to the ecu connector as Adam and i said before and re-pin. 

The fault is 100% at the wiring not the ecu not the sensors. 

[AWM747]

Did you get this figured out? I am running a G4x on an E34 with a M50B30 non TU. I am using a wiring harness form a 95 E34 and the ECU plugged right in an fired up once I got the Cam trigger set up right. I am using the Hall cam sensor but the NonTU trigger wheel so that took a second to figure out. Also using the 60-2 crank trigger(balancer) from the TU engine. As long as you are using the hall cam sensor and vr crank sensor it should work.

Those are wiring diagrams for a 95 E34 M50Tu with DME 3.3. The other wiring you were told to swap was for the older 3.1 NON TU DME wiring harness which has a VR cam and VR crank sensor. Don't do it as you have a 413 DME so your harness is wired correctly to just PNP.

 

[omar.harmoush]

On 7/7/2020 at 7:19 PM, AWM747 said:

Did you get this figured out? I am running a G4x on an E34 with a M50B30 non TU. I am using a wiring harness form a 95 E34 and the ECU plugged right in an fired up once I got the Cam trigger set up right. I am using the Hall cam sensor but the NonTU trigger wheel so that took a second to figure out. Also using the 60-2 crank trigger(balancer) from the TU engine. As long as you are using the hall cam sensor and vr crank sensor it should work.

Those are wiring diagrams for a 95 E34 M50Tu with DME 3.3. The other wiring you were told to swap was for the older 3.1 NON TU DME wiring harness which has a VR cam and VR crank sensor. Don't do it as you have a 413 DME so your harness is wired correctly to just PNP.

 

Yeah. Stupid mistake but i didn’t realize it would be an issue. Using a macbook running boot camp windows 10 can’t communicate with the ecu even tho it told me that it unlocked the ecu and was connected and was changing settings. After i got it back from Link it started right up and i got an actual windows laptop and i had no issues at all. Dumb issue but it is what it is lol.