Toyota PT546-00140, Troubleshooting Manual

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26 MAP Screen MAP Screen is not displayed.
Change to a known working extension box.
Is MAP Screen displayed?
Ext-Box faulty.
Head unit faulty.
DIAGNOSIS MODE : see next section.
No
Yes
No
Is the extension box installed?
When “MAP” button is operated, Is there the
message "BeSpoke Premium Audio is not
installed ………”?
Is the extension box wire harness connected
the head unit properly?
Are the vehicle harness connected to the
extension box properly?
No
Yes
Head unit does not recognize
the extension box.
Set DIAGNOSIS MODE
and turn off ACC and restart.
Yes
Yes
No
Connect the wire harness
properly.
Yes
No
When an extension box is not
installed, this function does
not work.
Connect the vehicle harness
properly.
No
Is there continuity in the wire harness
Between head unit and Ext-Box? Connect the wire harness
properly.
Yes