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Entering Diagnostic Mode With Super Monitor Display

  1. Prior to entering diagnostic mode, the following conditions must be met. Engine must be at normal operating temperature, battery voltage above 11 volts, transmission in "P" or "NEUTRAL", throttle valve fully closed and A/C off.
  2. Turn ignition switch to "ON" position. DO NOT start engine. Simultaneously push and hold in "SELECT" and "INPUT" "M" keys for at least 3 seconds. See Fig 1. The letters "DIAG" will appear on screen.
    Fig 1: Super Monitor Display
    G42850Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. After a short pause, hold in "SET" key for at least 3 seconds. If system is normal, "E/G OK" will appear on screen. If there is a malfunction, the code number for the malfunction will appear on the screen. In the event of 2 or more numbers, there will be a 3 seconds pause between each number.