Hello!
I assembled my new board into a motronic box with motronic55 connector.
I think this pinout is ok from Econoseal to Motronic55. This harness from S4 AAN.
http://www.vems.hu/files/Norbitron/econoseal-motronic.xls
Serial connection
I tried to connect my ECU to the PC but ...
- Found the problem: serial port is wrong (it doesn't want to communicate anything, i don't know why)
- I bought an rs232->usb converter. With that the ECU can connect to my computer.
- I am not sure that the serial port was wrong. When i tried the usb-serial converter i just connected the ECU and i didnt test it.
- test the serial port with terminalprogram and loopback wire (and measure voltages to include in any report)
- When i would try to connect the vemstune it's write me " ECU not connected" and the vemstune freezes
- when VemsTune freezes when opening the port, it's actually the windows driver that freezes (unfortunately usb-rs232 drivers often freeze, especially from Prolific)
- instead of "Detect", see "Device manager" and select the actual comm-port you have connected. This can avoid wasting time and running into windows and device problems and delays when opening unrelated serial devices (like GPS/bluetooth phone/GSM/etc...)
- you can check for "electric contact problem" but the root cause is usually a windows driver problem (in linux the same HW just requires a reopen and works, in windows the user usually has to pull the USB). However the windows-driver tends to freeze more if the usb-serial chip resets (often seen first when one starts to fire sparkplugs), so re-doing connections (with shielded cable) and stronger ground can also help
Using
- prolific serial-usb driver (which prolific driver version? Tried some other/older/newer version ?)
- and vemstune latest version (it does not matter in this case but the word "latest" is not good in reports. Use exact date !)
In 99% of cases it's the prolific windows-driver problem that causes symptoms exactly like yours.
- if TerminalProgram also fails to communicate, than you know 100% that it's not VemsTune but windows-driver related:
- after closing VemsTune (if windows blocked the program too heavily, then kill it)
- in 19200,8n1 open port and type "SManmdV"
- or use a pin2-pin3 loopback wire (or metal-contact, but carefully) on the DSUB9 connector, and see that it appears what you type
- while windows-serial drivers often freeze and block the program accessing it, the TCP driver is very stable: so if one cannot fix windows-serial-driver, avoiding it can be a good solution by using an external tool for serial => TCP: OverTCPWifiModule, OverTCPWireless