4.31.1 Invalid signal Error

The ECM is continually receiving data from a number of other control modules via the CAN system. If one of these control module identifies a problem within its own system that causes it to be unable to transmit valid data, it will a store DTC locally and transmit an error marker (a specific default value of the data that indicates an error) on the CAN system. When the ECM identifies an error marker from another control module, it also logs a failure.