Toyota Corolla (E170): Using the steering wheel switches to change audio source

The audio source changes as follows each time the “MODE/HOLD” switch is pressed.

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    Diagnostic trouble code chart
    Terms Terms Physical address Three–digit code (shown in hexadecimal) which is given to each component comprising the avc–lan. Corresponding to the function, individual symbols are specified. Logical address Two–digit code (shown in hexadeci ...

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    Inspection procedure
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