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| All the faults indicate is that the sub system on the tractor is reporting an unknown isolation valve state (it can’t confirm if it is on or off). It reports this status from the controllers on the tractor to the Nav over the CAN bus. Normally it is an electrical drama such as high resistance in the coil, or wiring to it. There were some software issues that allowed it to trigger easier than normal, which is why it’s important to make sure all the controllers on the tractor itself have updated software. | |
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