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I am researching the possibilities of implementing VEMS onto Porsche 911 (996, 1998 and newer) and Boxster (986, from 1997 and newer). Engine-wise there should not be a problem, earlier ones were with cable throttle and Motronic 88pin connector, later ones were with electronic throttle. I made .xls file for 911 pins vs VEMS pins, there are some question marks regarding some connections, perhaps can you give some suggestions? http://www.vems.ee/image/Porsche_996_986_VEMS_PnP.xlsx ------------------ Here's early (pre-2000 models, both Boxster and 996) 88pin Motronic 5.2 pinout: 1 - Heating of HO2S after TWC 2 - Idle air control valve, closing coil 3 - Fuel injector, cylinder 1 4 - Fuel injector, cylinder 2 5 - Fuel injector, cylinder 3 6 - Ground point 9 7 - EVAP canister shutoff valve 8 - Check Engine MIL 9 - not assigned 10 - not assigned 11 - not assigned 12 - Crash signal (airbag) 13 - knock sensor 1 (cyl. 1-3) 14 - Medium pressure switch (A/C) 15 - Intake air temperature sensor 16 - Engine compartment temperature sensor 17 - Signal, mass air flow sensor 18 - Signal, H02S 2 ahead of TWC 19 - Signal, HO2S 1 ahead of TWC 20 - Ground, speed sender 21 - Signal, camshaft position sensor 1 + 2 22 - Ignition coil, cyl. 4 terminal 1 23 - Ignition coil, cyl. 3 terminal 1 24 - Ignition coil, cyl. 5 terminal 1 25 - Camshaft adjustment, bank 2 26 - Terminal 30 27 - Triggering of DME relay, terminal 85 28 - Ground, electronic system (shield) 29 - Idle air control valve opening coil 30 - Heating of HO2S ahead of TWC 31 - Fuel injector, cylinder 6 32 - Fuel injector, cylinder 4 33 - Fuel injector, cylinder 5 34 - Ground, sender 35 - Coolant fan, stage 1 36 - Coolant fan, stage 2 37 - Triggering of relay (terminal 85), secondary air pump 38 - Version coding (ground for Tiptronic) 39 - Fuel reserve pilot light 40 - not assigned 41 - Knock sensor 2 (cyl. 4-6) 42 - Automatic I/M test 43 - not assigned 44 - Signal, throttle position sensor 45 - Ground, mass air flow sensor 46 - Ground, oxygen sensors 47 - 5-volt supply for mass air flow sensor 48 - Nominal engine torque to TC control module 49 - Ignition coil, cyl. 1 terminal 1 50 - Ignition coil, cyl. 6 terminal 1 51 - Ignition coil, cyl. 2 terminal 1 52 - Camshaft adjustment, bank 1 53 - 5-volt supply, throttle position sensor 54 - Voltage supply for various components 55 - Ground, ignition 56 - Terminal 15 57 - not assigned 58 - Actual engine torque from TC control module 59 - Tuning flap (intake manifold switchover) 60 - Programming voltage 61 - EVAP canister purge valve 62 - A/C compressor On 63 - Triggering of fuel pump relay (terminal 85) 64 - not assigned 65 - Relay of engine compartment purge fan (terminal 85) 66 - Start-inhibit relay (terminal 85) 67 - not assigned 68 - Position switch/clutch switch 69 - A/C compressor requirement 70 - not assigned 71 - Ground, knock sensors 72 - Tank pressure sensor 73 - Oil temperature sensor 74 - Engine coolant temperature sensor 75 - not assigned 76 - Signal, H025 2 after TWC 77 - Signal, H025 1 after TWC 78 - Signal, rpm crankshaft position sensor 79 - Speed signal from ABS control module 80 - Speed signal output 81 - not assigned 82 - Coolant level 83 - Fuel gauge 84 - not assigned 85 - CAN low 86 - CAN high 87 - L wire 88 - K wire ------------- Here's late type DME connector http://www.vems.hu/files/PeepPaadam/DME.jpg Here's pdf for pinout and for DME related schematics from Factory Workshop Manual: http://www.vems.hu/files/PeepPaadam/Porsche%20996%20Boxster%20VEMS%20PnP.zip Looking for hints/suggestions what would be the best way to get it to work. Piggybacking off of this. The connector looks like the M54/S54 BMW one, so probably possible that one PNP operates BMW and Porsche engines.
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