How To Initiate The Service Mode

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

While pressing the "MENU" button, press "A" portion (shown in the illustration) on the display briefly. Then press "B" portion for at least two seconds.

Fig 1: Identifying Radio And CD Player MENU Button
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 2: Display Service Screen (1 Of 2)
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
The service mode will be initiated. Then "Service" screen will be displayed.

Fig 3: Display Service Screen (2 Of 2)
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.