CM554 QSC 8.3 ECM Reflash issue

[mikkhh]

Not truck related but story from four years ago when there was volvo s40 2008 year that had abs fault - pump motor circuit malfunction c 0110. Fuses and supply woltages checked out all good. I was like okay, 99.9% the abs unit is faulty on those. Car owner got another abs module - that looked opened up and RTV d together, inside there was really really bad soldering and some capacitor added, but still plugged it in, there was no comms. So the customer brought another module, same pump fault.

Then I pulled the cover from wiring junction box - one latch was not completely installed, also there were visible signs that somebody had probed the wires and done measurements. There was no water damage visible to cabin. Then I asked a friend to check car history and previous software reloads (you need to match abs to car by volvo online tool or just edit abs serial number manually in immobilizer module), and then there it was just two days before the car was sold to next owner there had been abs module replacement registered.

After that I told the customer that 99.99% there have been now total of THREE faulty modules besides the original one that was on car. Costumer ordered used abs module control unit from Sweden, that one did work and fix the problem.