A customer asked an important question yesterday that we need to document better in our literature.
Our ISIS Intelligent Multiplex System has a significant amount of processing power in it. That means that it can do much more for the electrical system in you can than a traditional wiring harness can, including some important safety systems.
One of those functions is our action blocking. When the system boots up, the MASTERCELL scans all of the inputs and checks to see if the switches attached to them are on or off. On certain circuits, the MASTERCELL will block the POWERCELL outputs from turning on if the switch is on when it powers up. Specifically, these are the cooling fan and the starter solenoid.
This is done to protect the guy wiring the car through the process. Let's say that you have two guys working on the car, one in the trunk and one working under the hood. If the guy in the trunk were to connect the battery and the input for the cooling fan was on, you would not want it to start spinning and possibly injure the guy working under the hood.
If this were to happen, you would get a message on the MASTERCELL inSIGHT module saying that there was an abnormal state and that action was blocked. The message would also indicate which input number was blocked.
To clear this out of the system, you would need to turn off the switch that was blocked and remove the power from the ISIS system. Wait a few seconds and re-connect it. When the system boots up again, it will scan the inputs and clear out the abnormal state.
In early versions of the system, we applied this action blocking to all of the inputs. There are scenarios where you may not want this function to happen, like with door switches, so we removed the action blocking from all inputs except the cooling fans and the starter solenoid. If you have an early system with this function, contact ISIS Power technical support at (847) 232-1991 and we can get this code updated for you.
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