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Home >> Oldsmobile >> 1990 >> Toronado Base, 4T60/ME9 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - ECM >> Manual Operation Of Service Mode >> Making Specific Test Selection
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Making Specific Test Selection

  1. On NON-CRT equipped vehicles, scrolling to a lower specific test number is done by depressing the FAN DOWN button. Scrolling to a higher specific test number is done by depressing the FAN UP button. The system will automatically display the value for whatever specific test number is displayed.
  2. On CRT monitor equipped vehicles, scrolling to a lower specific test number is done by touching the NO key on the CRT monitor control panel. Scrolling to a higher number is done by touching the YES key. The system will automatically display the value for whatever specific test number is displayed.
NOTE: To cancel a specific test type selection and activate a repeat of the specific test type selection process, depress the OFF button on ECC panel of NON-CRT equipped vehicles or touch LEVL key on the CRT monitor control panel of CRT equipped vehicles.
Fig 1: Self-Diagnostic System Flow Chart (Non-CRT)
G90A00828Courtesy of GENERAL MOTORS CORP.