How to check engine codes with the Super Monitor.


Active Member
Mar 30, 2005
If your vehicle is equipped with the Super Monitor display (this is optional and not common) - pulling the engine codes on your Supra is a breeze.

just press and hold the monitor "Select" and "Input M" keys together for about 3 seconds with the ignition switch in the on position. When the "DIAG" message appears on the display, pressing and holding the "Set" key for three seconds will put the system in diagnostic mode.

The system will indicate any diagnostic codes stored in the ECU's memory.

Last edited: