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Home >> Oldsmobile >> 1997 >> Regency >> Repair and Diagnosis >> External Pages >> Different car >> Section 29 (Engine Control Systems Tests W/Codes) >> Diagnostic Trouble Codes >> DTC P1646 - Boost Control Solenoid Control Circuit >> Circuit Description
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Circuit Description

WARNING: This page is about a different car, the 1998 Pontiac Bonneville, 1998 Oldsmobile Regency, 1998 Oldsmobile LSS, 1998 Oldsmobile Eighty-Eight, and 1998 Buick LeSabre. However, it is still accessible from the selected car via links, so may be relevant.

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, including boost control solenoid, by supplying ground to device PCM is commanding on. ODMs can diagnose each circuit individually. If ODM "A" output 5 (boost control solenoid driver circuit) detects an improper voltage level, DTC is set.

Conditions for setting DTC: