Over the years I have seen quite a few ECU and component main connectors melt with various makes and models. Unlikely to be a shorted wire as this normally leads to that particular cable burning back its insulation.
2 Main common problems that lead to melted plugs are water ingress at the plug causing terminal pin corrosion and high resistance. The high resistance leads to heat and plug melting.
Second condition is at some point a previous technician may have poked meter leads into the female pin in the connector, spread the terminal so when it is connected back into the CEM the pin surface contact area has been reduced leading to high resistance at that pin and a build up of heat.
Soldering in a plug is an option but usually the last approach. Ideally the plug should be available separately and with a good de-pin kit all pins de-latched and transferred to the new plug. Check with Volvo about replacement plug sockets, most VMs I work with can provide sockets/plugs and replacement pins.
|