Mobile terminal, in-vehicle apparatus, communication system, and control method for mobile terminal

An in-vehicle apparatus for communicating with a portable mobile terminal, comprising:

• an in-vehicle connection detection device for detecting connection between the in-vehicle apparatus and the mobile terminal;
• and
• an in-vehicle control device for transmitting an instruction signal to the mobile terminal,
• wherein the instruction signal represents a control of a plurality of functions in the mobile terminal, the functions executed by consuming electric power of the mobile terminal, and
• wherein, when the in-vehicle connection detection device detects the connection, the in-vehicle control device transmits the instruction signal to the mobile terminal so as to suppress or stop executing one of the functions in the mobile terminal.

A communication system comprising:

• an in-vehicle apparatus mounted on a vehicle;
• and
• a mobile terminal for communicating with the in-vehicle apparatus,
• wherein the in-vehicle apparatus includes:
• a vehicle connection detection device for detecting connection between the in-vehicle apparatus and the mobile terminal;
• and
• an in-vehicle control device that controls a first function in the in-vehicle apparatus, the first function executed by consuming electric power,
• wherein the mobile terminal includes:
• a mobile connection detection device for detecting connection between the mobile terminal and the in-vehicle apparatus;
• and
• a mobile control device for controlling a second function in the mobile terminal, the second function executed by consuming electric power of the mobile terminal, and equivalent to the first function,
• wherein, when the vehicle connection detection device detects the connection, the in-vehicle control device controls the first function to be active, and
• wherein, when the mobile connection detection device detects the connection, the mobile control device controls the second function to suppress or stop executing the second function.