Circuit Description
WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue and 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
Ignition voltage is supplied directly to the AIR solenoid. Powertrain Control Module (PCM) supplies the ground path to the AIR solenoid control circuit via an internal solid state device called a driver. Each driver has a fault line which is monitored by the PCM. When PCM commands AIR solenoid on, voltage on control circuit should be about zero volts. When PCM commands AIR solenoid off, voltage on control circuit should be battery voltage. If fault detection circuit senses a voltage other than expected, this DTC will set.
The control module will monitor the control circuit for a short to ground, short to voltage, open circuit, open relay, or internally shorted or excessively low resistance relay.