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Home >> Cadillac >> 1989 >> Seville STS >> Repair and Diagnosis >> Engine Performance >> System >> DFI ECM Tests W/Codes >> Testing >> Self-Diagnostic System >> Entering Diagnostic Mode

Entering Diagnostic Mode

Turn ignition switch to "ON" position. Press "OFF" and "WARMER" buttons on climate control panel simultaneously, and hold until segment check is displayed on the instrument panel and the Climate Control/Driver Information Center (CCDIC). See Figure .

NOTE: Operating vehicle in the diagnostic mode for extended time periods (1/2 hour or longer), without the engine running, will cause battery drain, and possibly relate false diagnostic information and/or a no-start condition.
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