A controller area network (CAN) communication system is provided. The CAN communication system comprises: a CAN bus; at least one electronic control unit (ECU) coupled to the CAN bus; a host module coupled to the CAN bus for controlling the operation of the at least one ECU. The host module comprises: a controller; and at least two adapters coupled between the CAN bus and the controller for communication therebetween. The controller is configured to monitor a communication between a first adapter of the at least two adapters and the CAN bus by a second adapter of the at least two adapters when the controller is communicating with the CAN bus through the first adapter, and to switch its communication with the CAN bus from through the first adapter to through the second adapter when a failure of the communication between the first adapter and the CAN bus is determined.