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Home >> Cadillac >> 1990 >> Allante 4T60/ME9 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> ECM DTC EO27: Open Throttle Switch Circuit >> Failure Condition
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Failure Condition

  1. Throttle switch was never closed during the last ignition cycle in which the engine was running and the brake was depressed.
  2. Throttle switch has not closed in the current key cycle.
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