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Home >> Cadillac >> 1990 >> Seville Base, 440T4/ME9 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> ECM Trouble Code Charts >> ECM Code EO30: Idle Speed Control Circuit Problem >> Failure Conditions:
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Failure Conditions:

ISC plunger extending with TPS position less than or equal to 2 degrees or ISC retracting with TPS position greater than or equal to 14 degrees for 15 seconds.

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