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Home >> Pontiac >> 2000 >> Firebird Formula, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Control System - Self-Diagnostics - 3.8L) >> Diagnostic Tests >> DTC P1653: Low Engine Oil Level Light Control Circuit (Grand PRIX & Regal) >> Circuit Description
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Circuit Description

WARNING: This page is about a different variant/trim than selected.

Output Driver Modules (ODM) are used by PCM to turn on current-driven devices needed to control various engine and transaxle functions. Each ODM can control up to 7 outputs by supplying ground to device PCM is commanding on. ODMs can diagnose each circuit individually. If ODM detects an improper voltage level, DTC will set.

Conditions for setting DTC are: ignition is on, an improper voltage level has been detected on fan 2 relay driver circuit and conditions present for at least 30 seconds.

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