AIR Pump

The AIR pump is a regenerative turbine type which is permanently lubricated and requires no periodic maintenance.

The engine should be at normal operating temperature in neutral at idle. Using the scan tool enable the AIR system. Select HO2S Sensor ion the scan tool. The HO2S voltage should remain under 350 mV because air is being added to the exhaust. If the HO2S voltage remains low during the Output Test, the AIR pump and AIR solenoid valve are operating satisfactorily. If the HO2S voltage does not remain low when the AIR system is enabled, inspect for the following:
^ A malfunctioning AIR pump or relay.
^ A malfunctioning AIR solenoid valve assembly.
^ A problem with the vacuum supply to the AIR solenoid valve.
^ AIR pump for proper mounting.

Refer to the appropriate DTC for diagnosis of the AIR system.