Diagnosis mode

Press the "ADJ" switch with the ignition switch at "LOCK" (OFF) position, and while keeping on pressing, turn the ignition switch to the "ACC" or "ON" position. When the "ADJ" switch is pressed continuously for more than five seconds, the service function is activated at the same time with the reception signal (pip sound) and the first menu screen of the service mode is displayed.

Fig 1: Service Mode First Menu Screen
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Press the function switch 2 [DIAG]. The screen is switched to the diagnosis mode.

Fig 2: Diagnosis Mode Status Screen
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
When respective function switches are pressed, the screen is switched as follows.
- When the function switch 1 [VER.] is pressed, versions of the monitor and the air-conditioner are displayed.
- When the function switch 2 [VEHICLE] is pressed, the status of the vehicle signal is displayed.
- When the function switch 3 [COM.] is pressed, the communication and the connection are checked and the results are displayed.
- When the "ADJ" switch is pressed, the screen returns to the service mode second menu screen.
Version display screen
Press the function switch 1 [VER.]. In the case of No-automatic A/C circuit or automatic A/C circuit open, version is not displayed. Press "AD" J [BACK], returns to Diagnosis display.
NOTE:
1. M: Mitsubishi Electric
2. D: Denso
Fig 3: Version Status Screen
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Vehicle signal status display screen. Press the function switch 2 [VEHICLE]. Press "ADJ" [BACK], returns to Diagnosis display.

Fig 4: Vehicle Signal Status Display Screen
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Press the function switch 3 [COM.]. When the ignition key is at "ACC" position, turn the ignition switch to "ON". Refer to "Automatic check mode". The check will be finished within 10 seconds after ignition switch "ON" or pressing the function switch 3[COM.].

Fig 5: Checking System Connection Status Screen
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Communication and connection check results display screen

Fig 6: Communication & Connection Check Status Screen
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
- When the function switch 2 is pressed on this screen, the unit status is displayed.
  
  Fig 7: Unit Status Screen
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
- When the function switch 2 is pressed on this screen, the inner status of the monitor is displayed.
- Press the function switch 3 on this screen, unit status displayed. The inner status of the monitor is displayed.
- Press the function switch "ADJ" [EXIT] to return to diagnosis menu.
- Press the function switch "ADJ" [BACK] to service mode first menu.
Fig 8: Monitor Status Screen
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.