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Home >> Buick >> 1990 >> Reatta 2D Convertible, 4T60/ME9 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - ECM >> Manual Operation Of Service Mode >> Making Specific Test Selection

Making Specific Test Selection

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 values 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 ECCP.