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Home >> Oldsmobile >> 1990 >> Toronado Base, 4T60/ME9 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - ECM >> Entering Self-Diagnostics >> Exit Self-Diagnostics
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Exit Self-Diagnostics

During self-diagnostic procedures, it is possible to exit service mode without erasing trouble codes. On non-CRT equipped vehicles, exit service mode by depressing BI-LEV button on the ECC panel and turning ignition switch to OFF position. On CRT monitor equipped vehicles, exit service mode by touching RTN key on the CRT monitor panel or exit by turning ignition switch to OFF position.