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Home >> Cadillac >> 1994 >> Eldorado Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Engine Controls - Tests W/Codes - Pcm) >> Pcm Code Charts >> Pcm Code P027 - Open Throttle Switch Signal >> Note On Intermittents

Note On Intermittents

WARNING: This page is about a different car, the 1993 Cadillac Seville and 1993 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.

Ensure ISC plunger is depressed when throttle linkage contacts stop screw. Check ISC jumper connectors and PCM connector for loose or improperly crimped terminals.

Fig 1: PCM Code P027 Schematic - Open Throttle Switch Signal
G93H40300Courtesy of GENERAL MOTORS CORP.
Fig 2: PCM Code P027 Flow Chart - Open Throttle Switch Signal
G93J40302Courtesy of GENERAL MOTORS CORP.
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