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Summary of change:
vems 3.7 board '''originally vr/vr setup, home-changed to vr/hall''' engine '''BMW m50b25tu ''' Firing order 153624 (use this order in wiring desc also) * '''primary trigger=VR''' 60-2 crank ** '''R30=18k''' (but 10k or 27k should also work). You probably do NOT want to change anything around primtrig, since primtrig=VR already (1k would be too strong anyway) * '''secondary trigger=HALL''' sensor on cam ** '''Changing to HALL should be simple''', see GenBoard/Manual/InputTriggerHardWareSectrigHall ---- bottom view https://drive.google.com/open?id=1eMa0XuRHrnh7cIYlCcI1ERID85F0nHxQ top view https://drive.google.com/open?id=1HEHAyxgnL-CFirkSctx10CqGjVuHbLED * I understand that the '''sj7 which is closed need to be opened''' ** yes, unsolder ---- '''Also: apply the short according to small slanted line''' http://www.vems.hu/manual/html/images/Testing/v3.6_sec_trigger_1_m.jpg My image looks diff at this point: https://drive.google.com/open?id=1WQ8ZMNXJSmv1sGjeOYzjHtMW9af0N-gW * Of course different, because yours is configured for VR '''Recommended mod:''' * the '''manually SOLDERED 2k7 (2701) resistor must be removed''' ( on your pic: at 4 hours from the southern end of hotmelt) * '''R48''' must be installed ('''input signal pullup: 2k7..4k7''') ** some hotmelt seems to be over the most convenient place for sectrig input pullup, remove southern end of hotmelt before soldering ** soldering the removed "2701" 2k7 resistor could work if not damaged, but the rescuekit (small bag included with devices) should have new resistors For the curious, About '''the other 5 holes''': * there is a '''red wire attached''' at another point on the bottom ** do i just disconnect it ? ** goes toward LM1815 pin3, should not matter. I would leave that, do the above mods, and test that way (remove if necessary, or cut+insulate or cut both ends, but it should not matter). ** actually, if you're absolutely certain the HALL sensor output is 0/5V (not 0/12V, but usually HALL output pulls to GND which is fine, even if HALL sensor is powered from 12V) the simplest hack would be to cut the northern end of red wire, blank it a few mm, and connect it to the 5V1 zener (SOD-80, left on your pic) stripe-marked cathode (or SMD pad under the cathode; trace goes to processor pin). "2701" should stay in this case (act as a pullup resistor, even if not originally ment as input pullup) *** This hack bypasses input protection so not normally done: the above recommended mod is better if possible (you have an SMD or throughole resistor 2k7 .. 4k7) First '''input tests:''' * input disconnected: DC voltage measured >3.7V * 1k between input and GND (instead of HALL sensor), DC voltage should measure: between 0.5V and 1.5V Than '''verify in InputTrigger/TriggerLog''' --------------------------------------------------- done as per pic moved the resistor so it looks as above connected the red line in the above pic got 5 v at signal and verified it by putting 1k resistor between signal and supply and got 1.5 v thank you done the wiring, connected the pc using a usb ftdi cable, updated the ini files on the software then i have done the wiring according to the vanos in http://vems.hu/download/v3/Motronic88/325-M50-vanos-and-nonvanos_OBSOLETE.xls and used http://vems.hu/download/v3/Motronic88/base_M50_vanos_1.2.31.vemscfg the car is a 92 m50 i imagine it has vr primary sensor which according to above pic my ecu is vr primary '''(how do i know which one on crank sensor is signal ? middle or end one)''' on the primary trigger there is 3 pins 3 wires i have connected the yellow wire to ec36-27(thats the only sensor connected) and connected the black to ec36-5 close to ecu and shield to battery ground. when i power on just ecu to record trigger log it says '''NO INPUT''' connected '''Crank sensor reads .519 KOhms across signal and ground''' * sounds good (although "it is working" can be confirmed with scope, or soundcard, or signal input to VEMS). * '''ec36-27 is input''' (not output), measures DC voltage=2.84V (make sure to be very clear about what is measured, where, how) ** 2.84V is way too high for primtrig VR, We'd expect around: 5 * 519 / (18519) = 0.14 V DC voltage at EC36/pin27 * My ecu has '''183 resistor at r30''' ** R30=18k is good, but still some strong pullup is in effect around primtrig VR input. '''EC36-28 not used''' (no wire in ec36/28) Should i add wire be joining ec36-28(5v out) to 27k then to the crank signal wire yellow * the crank signal is VR, which does NOT need strong pullup (actually, your R30=18k seems good, but the voltage indicates something weird, maybe unintentionally tinkered around primtrig that was factory VR in the first place ?) Why not setup sectrig properly? * m50b25tu engine has camshaft angle control, it is ugly to run such a nice engine without sectrig (and finally VANOS) ** you would also find out if, for some reason sectrig HALL works, but primtrig VR not Maybe '''p259 damaged by insufficient ground ?''' That could be one possible reason to have no LM1815 (+5V) supply internally (can you measure ?), and no primtrig VR reading. * of course VR signal scopeshot, or at least DVM AC voltage measurements could help a lot to diagnose. --------------------------------------------------------- If the ecu is powered up and grounded the ec36-27 is showing 2.84V between ec36-27 and ground with no sensor plugged in ! * Can be OK * Doesnt the vr need 5V? ** no, this measurement is not very indicative. Measure with VR sensor (or other KNOWN, documented resistance) connected between EC36/27 and GND I understand its input but its got 2.84V comingout of it thats why above I actually meant to add pin28 to pin 27 to get the 5V via 27k resistor * measure with VR sensor connected I '''do not have a scope''' to read the sensor. Cld i have a image of where to check for voltage as uve mentioned above and which pinon the lm1815 * checked the 2 '''lm1815 both have 5V at pin 8''' ** that is VERY good news, thanks for checking. I will be running the sectrigger too but wanted to get the primary working first ------------------------- I measured the vr input close to ecu at pin27 and battery ground with the sensor plugged in it read 0.138.(confirmed test) when i open the record trigger with the tools drop down it says no trigger in the bottom corner. and doesn't make a difference if i plug or unplug it. i have turned the cranked the engine 1-2 turns it still has no difference. ----------------------------------- realised that even if it is plugged in it says no input trigger till u crank it for longer (only needed if sectrig is not installed, or disabled) ok cranked it for a bit longer and finally got a signal looking at the trigger log i realised i was getting (missingtooth=1 cycle58) realised the poarity need to be swapped as in black wire to ecu and yellow wire to ground near ecu finally got missing tooth=2cycle58 after a few tries i managed to get a nice log https://drive.google.com/open?id=1Sc8Zl_yDUyR2saVEYHr7X-nRdf3jjjt8 (old firmware 1.2.0) '''could you confirm''' if the cylinder and injector coding in the m50 vanos basemap is correct as i feel its wrong http://vems.hu/download/v3/Motronic88/325-M50-vanos-and-nonvanos_OBSOLETE.xls this is my last config if you could check triggersetting for a m50b25tu single vanos and the injector visual as its a bit confusing i have it as in the ecu according the above excel sheet ie '''Inj outputs''' cyl1 inj going to pin 20 cyl5 pin 7 cyl3 pin 9 cyl6 injector to pin 8 cyl2 pin 18 cyl4 pin 19 '''IGN outputs''' cyl 1 coil pin 12 cyl 5 pin 35 cyl 3 pin 36 cyl 6 pin 11 cyl 2 pin 33 cyl 4 pin 34 Fpump pin 31 Please update this page: correct, exact format, like EC36/31, and make logical channel number like "ignch N" appear uploaded the 1.2.31 firmware restarted and validated the m50 vanos map with the inj and coil changes as its different to the excel doc my trigger log https://drive.google.com/open?id=1NYTYx-d9BLSVdkv-mty9lr5N8x1_1inj my config file (new firmware) https://drive.google.com/open?id=15mR1q_rnBNq_9ybcPSn_w76O9AV2ZatF does not fire ? Please note that there is a working [http://vems.hu/download/v3/Motronic88/base_M50_vanos_1.2.31_srl13xxx.vemscfg M50 Vanos base config] under [http://vems.hu/download/v3/Motronic88/ downloads] (with a quite sane pinout) * of course the outputs must be adjusted to match if the pinout deviates ----- Hello Optimap, I have reviewed your config and triggerlog (fw1.2.31.triggerlog and newfwvanosmafppin31and corrected to firing order.vemscfg). From my review there should be no configuration problems prohibiting you from starting the engine; Have you verified the ignition timing in cranking (INJ fuse removed) so ING only) on all cylinders before attempting to start the engine ? If so you should be good to go. If your fireup problem persists, please supply a vemslog of engine cranking 8-10 seconds (but not firing) so i can review your case using both configuration and ecu realtime variables. We'll work from there. Best regards, Dave
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