A vehicle controller which can realize a reduced cost and high reliability
at the same time. A control target status signal outputted from a control
target is inputted to a monitoring unit. The monitoring unit compares a
control command value with the control target status signal to determine
whether the control target operates normally as per the control command
value. When the monitoring unit determines that the control target does
not operate normally, it outputs a failure detected signal to an actuator
driving unit.