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Please disconnect outputs initially (every output you can), and enable after
- Ohm measurement
- output test measurement
- regardless of any assumption (eg. this worked earlier, ...)
We received a report that some outputs activated by p259 does not actually activate (including BMW52/73 DME relay and BMW52/69 fuel pump).
- Known: the outputs certainly activated properly during tests, before sending the device.
- the report did not have config, vemslog and measurement details, so cannot be verified, but it might suggest p259 got damaged somehow
- maybe something small (misconfiguration, "safe mode" or similar), but if some output is misdocumented or misunderstood, this might be the only way to know.
- Note: Some outputs might be difficult to disconnect (hopefully it's not those that cause problem).
- M52/pin9 (p259/2) fuel consumption output
- M52/pin20 (p259/4) CEL (check engine light)
another BMW M52 harness (for the bench)
We received an M52 harness (and some sensors including the frequency output cam-HALL sensor), and did more tests this week.
- we had a harness earlier, but it was not confirmed to have originated from M52 (now it seems quite likely the old was also from M52)
- the new harness had DME relay so all DME relay tests could be done:
- high voltage flyback is best for DME relay output BMW52/73 , not just a diode to (EC36/23=) BMW52/87 = BMW52/54
- because it is not desired to have the DME relay solenoid slightly leak voltage to injector +12V in unpowered state (although it does not effect normal operation).
- FP relay was not included in the harness, but FP relay output activates even if loaded with 75Ohm resistor or 100 Ohm relay (given that DME relay is ALSO powered !)
Cylinder # to EC36 Pin numbers for Inj and Ign outputs? See the default uploaded config (even if acidentally changed, find on the local notebook drive, under VemsTune VEMS_files ... bkup dir).
Also see [M50-vanos-vs-s50b32-vs-M60B40_B30.xls spreadsheet]
Below is based on M52-to-EC.xls (8 IGBT ECU, 6 passive coils)
Cyl 1 - Inj A EC36/7 (MOT88/6) - Ign0 EC36/35 (MOT88/29)
Cyl 2 - Inj B EC36/19(MOT88/5) - Ign7 EC36/10 (MOT88/1)
Cyl 3 - Inj C EC36/8 (MOT88/22) - Ign2 EC36/34 (MOT88/30)
Cyl 4 - Inj D EC36/20(MOT88/24) - Ign3 EC36/36 (MOT88/2)
Cyl 5 - Inj E EC36/9 (MOT88/33) - Ign6 EC36/24 (MOT88/31)
Cyl 6 - Inj F EC36/18(MOT88/23) - Ign1 EC36/33 (MOT88/3)
Single Vanos MOT88/21 = EC36/12 ignch5 IGBT
- low voltage flyback would be advantageous ?
- eg. BY399 diode (cathode on EC36/23 = BMW88/87 flyback).
- MembersPage/BmwMFiftyTwoFlyback