For the K5 & K7 models (and I suspect also the K6), the ECU connections to the wiring harness are as follows. There are 2 connectors: a large one with 34 pins in 2 rows of 17; and a small one with 18 pins in 2 rows of 9. Total pins = 34 + 18 = 52.
The I.D.s below are what is used in the workshop manual. Where two I.D.s are listed for a pin, the second one is the label found on the ECU circuit board.
Lines in red indicate pins that are not connected to anything in the wiring harness.
Large connector, top row. pin I.D. Function 1 COS2 switch/trim inj. map 2 COS1 switch/trim inj. map 3 MO- secondary throttle motor 4 MO+ secondary throttle motor 5 STPS, MPS secondary throttle position sensor 6 tech to instrument panel 7 TXD1 8 TPS,VTA throttle position sensor 9 IAP1, PM intake air pressure cyl1 10 ECT,THW coolant temp 11 Vcc +5v 12 HO2S 13 TXCK 14 N+ crank pos. sensor 15 AT +12v from ign switch 16 batt +12v from battery (via fuse) 17 +B +12v if sidestand is up and kill switch at 'run'
Large connector, bottom row. pin I.D. Function 18 COV3 19 COV2 20 COV1 21 OX2 22 TOS,DON tip-over switch 23 GP gear pos sensor 24 RXD1 25 RST 26 IAP2,PM2 intake air pressure cyl2 27 IAT,THA intake air temp 28 FWE 29 E2 30 RXCK 31 N- crank pos. sensor 32 SDL (*) 33 VM +12v at fuel pump, injectors 34 E1
Small connector, top row. pin I.D. Function 35 HO2H 36 LED (*) 37 TACO tacho 38 FP,IREL fuel pump relay 39 SOL22 40 PAIR,SOL2 solenoid PAIR system 41 FI2,#21 injector, cyl2 42 FI1,#11 injector, cyl1 43 IG1 coil, cyl1
Small connector, bottom row. pin I.D. Function 44 MS mode switch (*) 45 EXS 46 TS dealer mode switch 47 NT neutral 48 CLP,CLT clutch lever switch 49 STA starter motor relay 50 E03 earth 51 E01 earth 52 IG2 coil, cyl2
The following pins connect to two sockets at the tail of the bike for dealer/factory trimming of injection maps: Socket 1: 1, 2, 18, 19, 20 (COS & COV pins) Socket 2: 32, 46 (dealer mode switch, & SDL)
Some of the unconnected pins are of no interest ... they are for oxygen sensors / heaters etc for other markets.
(*) Items to note or investigate:
what is pin 32/SDL ?
what is pin 44/MS ? ... I traced where this runs to in the wiring harness - pins 34, 44, 50 and 51 are all connected via Black/White wires to a sealed plug. Upon opening up the plug, I observed that all pins are shorted with a metal shorting plate, which also connects them all to earth. I suspect it may be a mode selection pin?
what is pin 36/LED ? ... for driving an LED to indicate something?
I'm not that familiar with the SV but doesn't the instrument cluster have an FI LED to indicate faults? That is where I would have suspected the LED to be connected. Or does it read out codes on an LCD screen like the Busa?
there is an FI LED in the instruments, but I suspect it is controlled via the 'tech' pin of the ECU, the LCD screen also displays codes (when the 'dealer mode' pin is earthed) which are also transmitted on the tech pin I guess. And other things on the instrument cluster (engine temp) too are I'm guessing also derived from the signals on the tech pin.
the LED pin #36 is not connected to anything in the harness (hence the red coding above) ... I'm half-tempted to just connect up an LED on my own bike and see what happens ...
Bozo, Have you experimented with those pins 32, 36 & 44? I'm looking at those COV & COS pins and thinking... Why is the TEKA the only thing out there that can modify the tuning part of the ECU? I've read the ECU Hacking thread on SVDownunder and can remember in there somewhere that this connector addresses a separate chip from the controller? if it's just eeprom we should be able to read some values from it with SPI, I2C etc...
My 03' has the ECU with single Plug, so pins are in a different spot. However when comparing the 05' ECU in the manual to 03', the COV/COS pins come to the same plug, with same colour wiring, but I don't know which ones are COV & COS? Any chance you could tell me the colours of the wires going to the COV / COS pins?
Maybe obd2 tools are useful,i introduce you website www.obd2tool.com
__________________
MB SD Connect C4 Super With Wifi Card MB Star Pro C4 With laptop Dell D630 preinstalled V2017.03 full set, Mercedes Star Diagnostic C4 Software activated, you can use directly.