How To Start Speaker Connection Check 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.

Enter the speaker connection check mode according to the following steps:

Turn the Ignition switch to the "ACC" or "ON" position and switch off the radio and CD player.
Press the following buttons in that order within sixty seconds from step 1.
1. Button A
2. Button B
3. Button C
4. Button D
  
  Fig 1: Display - Button Switch Screen
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.