Vehicle diagnosing apparatus

A vehicle diagnosing apparatus for communicating with an electronic control unit mounted on a vehicle from outside the vehicle and determining whether or not the vehicle has passed with respect to a plurality of diagnostic items based on various data transmitted from the electronic control unit, the vehicle diagnosing apparatus comprising:

• a first diagnostic unit for executing a first diagnostic program;
• a second diagnostic unit for executing a second diagnostic program which is different from the first diagnostic program;
• and
• a communication unit for communicating with the electronic control unit;
• wherein
• the first diagnostic unit, the second diagnostic unit, and the communication unit are located outside of the vehicle,
• the first diagnostic unit is configured to send, to the communication unit, a request for requesting the electronic control unit to send first data, and the second diagnostic unit is configured to send, to the communication unit, a request for requesting the electronic control unit to send second data, and
• the communication unit is configured such that, when the communication unit receives the request for requesting the electronic control unit to send first data from the first diagnostic unit, and the communication unit receives the request for requesting the electronic control unit to send second data from the second diagnostic unit within a predetermined period of receiving the request for requesting the electronic control unit to send first data from the first diagnostic unit,
• if the first data and the second data are of the same type, then the communication unit sends a single request to the electronic control unit requesting the electronic control unit to send the same type of data, and sends the same type of data received from the electronic control unit, to the first diagnostic unit and the second diagnostic unit, and
• if the first data and the second data are of different types, then the communication unit sends a single request to the electronic control unit requesting the electronic control unit to send the first data and the second data, receives the first data and the second data all together in a single transmission from the electronic control unit, sends the received first data to the first diagnostic unit, and sends the received second data to the second diagnostic unit.