Circuit Description
WARNING: This page is about a different car, the 2001 Pontiac Grand Prix, 2001 Pontiac Firebird, 2001 Oldsmobile Intrigue, and 2001 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
Inlet and outlet valve solenoid circuits are supplied with battery power when ignition is on. EBCM controls valve functions by grounding circuit when necessary.
DTC sets when EBCM detects open, short to ground or short to voltage in solenoid coil or circuit.