So this time I decided to take it apart and have a look inside, this is what I was immediately greeted with:- These are the solder pins for the OBD wire These are the pins of the connector that connects the top and bottom boards together Now both sets of solder joints were looking in a right sorry state, mostly rather dull looking, these could be referred to as dud solder or cold solder joint, which could result in giving bad electrical connection. It then came flooding back to me, last time I used my HIM I remember suspecting that there was either a break in the OBD wire that comes out of the HIM or a connection/circuit issue on my HIM that was causing it not to be able to talk to the car. Great, so its not got any issues with comm ports, that part is working just fine. So I thought lets try that, so I try it and it asks to press the button on the HDS for a few second, I press the button and hey presto it starts updating the HIM firmware.
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