Chart C-6 Air Management Check

AIR Management Diagnosis:

PFI Emission Circuit:

DESCRIPTION

The AIR divert and switch solenoids are supplied with 12 volts on circuit 639 from the 19 amp number 3 solenoid fuse on the underhood relay panel. The ECM controls air management by grounding AIR switch solenoid circuit 436 and AIR divert solenoid circuit 429. To divert air to the air cleaner, the divert solenoid is de-energized. When pin E9 at the ECM is grounded, the divert solenoid energizes and diverts air to the switching valve. When the switch solenoid is de-energized the air is routed to the catalytic converter and when pin E6 at the ECM is grounded the air is routed to the exhaust ports.