I've been troubleshooting an interesting issue with my EAS which is affecting the rear left corner of my P38 (now named Rachel).
It started yesterday when dropping to highway height caused a hard fault. I reset the fault, drove on and got to my destination. On the way home the same thing happened again after dropping to highway height. In both cases the fault was related to the left rear valve.
Fast forward to today. Did some troubleshooting and found the following. Actuating specific valves using the EAS Unlock software from Storey works on all valves except the rear left valve (consistent with the symptoms so far). I measured the current to the left rear valve's solenoid (little black wires into the solenoid body) and there is no current flow when actuating the valve. All the other valves read around 1,2A when being actuated.
Cool, makes sense so far. Checked all the wiring I can get to without removing the valveblock and it all seems fine, so my next step is to remove the valveblock and check the wiring that I can't get to with it installed.
First step is to depressurize the bags for valveblock removal. Here is the strange part: the rear left corner deflated down to the bumpstops! This means that the rear left valve must have been actuating correctly right? Or is there some different logic involved here that I am missing?
For completeness this valveblock and driver unit all came from a wreck that had been put on coils before being scrapped. I rebuilt it (o-rings, diaphragm etc) a week or two ago and it has been working properly until I had this issue yesterday.
I'm going to continue stripping the valveblock out and perhaps swap out the driver unit from the valveblock that I got in the car originally.