Having an intermittent overheating problem, and would like to be able to diagnose further. Can the diagnostic boxes help figure it out? The temperature guage works OK, but I don't think that the fan is being turned on. Will the diagnostic allow you to command the fan to run, or only to see if the ECU is trying to start it?
Anybody got any bright ideas?
I have tested the fan realy, that is functioning, and if I loop the contacts, the fan does run.