How to enter the Diagonstic Mode of a Mitsubishi AM/FM-ST Electronic Tuning Radio, CD Player (DY-1MU3R45-T and DY-1MU3R45-T-2)

Introduction

The Mitsubishi AM/FM-ST Electronic Tuning Radio CD Player is a popular infotainment system found in many Mitsubishi vehicles. While it offers a range of features and functions, accessing the diagnostic mode is often necessary for troubleshooting and performing system updates. However, entering the diagnostic mode can be a bit challenging for those who are not familiar with the process. In this guide, we will provide step-by-step instructions on how to enter the diagnostic menu of a Mitsubishi AM/FM-ST Electronic Tuning Radio CD Player, so you can easily access the system's diagnostic features and settings.

Step 1 Turn on the Ignition

How to enter the Diagonstic Mode of a Mitsubishi AM/FM-ST Electronic Tuning Radio, CD Player (DY-1MU3R45-T and DY-1MU3R45-T-2), Turn on the Ignition: step 1, image 1 of 1

Turn the Ignition switch to the ACC or ON position.
Switch off the radio and CD player by py pressing on the PWR/VOL knob.

Edit

Step 2 Enter Diagnostic Mode

How to enter the Diagonstic Mode of a Mitsubishi AM/FM-ST Electronic Tuning Radio, CD Player (DY-1MU3R45-T and DY-1MU3R45-T-2), Enter Diagnostic Mode: step 2, image 1 of 1

Press the following buttons in that order within sixty seconds from Step 1:
The 1 RPT button.
The ⏮ button.
The ⏭ button.
The 4 ⏩ button.
The display should now read DIAG MODE.
When an invalid button is pressed during diagnosis mode except the hands free-ECU update, the diagnosis mode will be cancelled, thus switching off the radio and CD player.
While in diagnosis mode, the sound input to the microphone unit is output directly through the speaker.