fzust

I figured this was a Serial Port compatibility issue.  I tried both USB-Serial converter, by Prolific which is hugely popular and an old Dell with a serial port.  I can see in caltool that I can select the right com port but ECU will not connect.  I tried raising the speed from 9600 to 115.2k.  This had no effect on cal tool, but when I ran the install package, it said "connecting to ECU..."  The dots continued 1 per second for 20 minutes.  

So does anyone know the serial port parameters the ECU is looking for?  Is there a way to change or check them in cal-tool?

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littleozfella
Caltool will automatically select the baud etc, but be sure you have the right port selected. Are you 100% sure you have the correct wiring of the RS232 to ECU.. You don't indicate what ECU you are using so I will assume SQ6.   Pin 36 TX goes to RS232 Pin 2.   Pin 66 RX goes to RS232 Pin 3 and Pin 35 Sensor 0v goes to RS232 pin 5.  MUST have 0v.   Be sure all anti-virus is disabled and firewalls are switched off until you get connection.  Also you can use EOT to check connection, with EOT firewalls must be off!
Cheers 
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fzust
After trying it about 20 times, it just randomly barfed the package on the ECU.  Clearly they are using some ancient command line DOS program to do this.  Not fault tolerant or user friendly.  Just the smallest amount of work here would make it seamless.....
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littleozfella
its always worked seamless for me.. speak tech or English, what is barfed (besides Australian slang for Vomited) did you connect or not??
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littleozfella
please remember RS232 is DOS based and not officially supported by later windows!
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littleozfella
PS..  Just to be clear, you were trying to load a field update?? not connect with Caltool..  To load a field update the ECU must be without power, start the field update then power up the ecu.. The comms port on the ecu is active when powered up so it will not allow coding updates.  On power up the field update will ping the ecu and allow the update before the serial data commences.  
sorry for the confusion as Caltool was mentioned..

cheers
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fzust
Yes, it vomitted the package onto the ECU.  Yes, I was trying to load the FBW update to the ECU.  I did the procedure w.r.t. the without power, start update, then power up about 20 times, it magically worked once.  Thanks for the response!
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