A control device for vehicle-mounted equipment according to the present invention includes a first sensor, a second sensor, a first microprocessor, and a second microprocessor. The second microprocessor generates a second sensor data request signal for requesting the second sensor to transmit second sensor data. The first microprocessor determines whether an abnormality has occurred in the second microprocessor based on the second sensor data or the second sensor data request signal, and based on a signal relating to information on the second microprocessor which is transmitted from a second inter-microcomputer communication unit of the second microprocessor.