Daniel Checketts Posted November 22, 2012 Report Share Posted November 22, 2012 Hi, Firstly, can I just say that it's great to see active support of your older products when you could have just turned away when they were discontinued like so many other companies do. My problem is that when running pclink, the software will popup with a message saying 'link disconnected due to excessive acquire errors' and then it wont be able to reconnect again but will bring up a message saying to check the ECU power and serial port com. I'm using a USB -> serial port connector from DSE on a Windows XP laptop circa '04. It's quite happy to connect when working but as soon as this message pops up its hit and miss as to when it will connect again. Sometimes disconnecting the battery or restarting the computer works but others there isn't any joy. A list of recommended settings for the port would be a big help. Thanks, Dan. Quote Link to comment Share on other sites More sharing options...
Daniel Checketts Posted November 30, 2012 Author Report Share Posted November 30, 2012 Hi, This is causing me a lot of grief. The problem is still happening after I have switched to a laptop on a clean windows xp install with a serial port.The problem happens after 100-150 seconds of being connected with the engine not going and most circuits unplugged, eg wideband oxy, tps, iat, injectors, igniter, etemp, fan. Quote Link to comment Share on other sites More sharing options...
Simon Posted December 3, 2012 Report Share Posted December 3, 2012 Could be the serial link or ribbon cable connections or the USB to serial device. The warning is indicating too many errors in the data stream. If you have another USB converter I would try this first. Assuming the Serial link and ribbon cable are in good condition. Quote Link to comment Share on other sites More sharing options...
Daniel Checketts Posted December 3, 2012 Author Report Share Posted December 3, 2012 I have removed the usb adapter and gone to a straight serial connection. The serial link and the cable look fine on inspection and both are relatively new. I will try and find a new ribbon cable. Is there any way to check if the serial link is working correctly? Quote Link to comment Share on other sites More sharing options...
Simon Posted December 5, 2012 Report Share Posted December 5, 2012 Normally they connect or they don't. Only other thing would be a visual check to make sure no connections have broken mainly around the connector in and out. Quote Link to comment Share on other sites More sharing options...
Daniel Checketts Posted December 8, 2012 Author Report Share Posted December 8, 2012 Ok so I think I've exhausted every option. I have: -Changed laptop to one with a fresh windows xp install with only pclink on it. Running on battery power -Changed serial cable from 'USB to Serial' to just straight serial to serial connector and cable -Change DIL ribbon cable -Unplugged all plugs in the engine bay to reduce the electrical noise -Pulled all unnecessary fuses -Finally removed the PCLink from the car and connected only +12, P and S GND, NB Oxy to a 12V Battery -Changed speeds and other settings on the Serial port -Visually inspected SerialLink, ECU motherboard and daughter board for any broken traces, connectors, blown caps, broken solders points Still after 60-150 seconds the message appears. Another thing I have noticed is that even with the NB Oxy input wire tied to GND it continues to float between 0.00V - 0.03V. A similar float was also happening to the map and input voltage but since changing to the isolated environment they have settled. What should I do next? Quote Link to comment Share on other sites More sharing options...
Simon Posted December 10, 2012 Report Share Posted December 10, 2012 Just a thought it might be your signal ground is suspect. The joins around the main header of the ECU can fracture over time if its an early unit. you can check the under side of the header to see if there are any signs of fatigue. Quote Link to comment Share on other sites More sharing options...
Daniel Checketts Posted January 10, 2013 Author Report Share Posted January 10, 2013 Replaced C1 on the ECU to no avail. Replaced the Maxim MAX232CPE on the serial link and problem solved. Quote Link to comment Share on other sites More sharing options...
blwncr1 Posted November 21, 2014 Report Share Posted November 21, 2014 Sorry to dredge up an old thread but i am having this same problem. Have checked earth's. Where do i find a new Maxim MAX232CPE to replace my one? Quote Link to comment Share on other sites More sharing options...
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