Seconady air injection (AIR) system and diverter valve description and operation.
This calve is used on chevy trailblazer, gmc envoy, oldsmobile bravada 4200 engine.
Electrical
connector
Electrical
connector
Engine
mounting
surface
Mounting bolts
Output
air hose
The AIR diverter valve has an electronic solenoid
mounted on the valve. The resistance of the
solenoid is 4-7 ohms and the current draw is
2-3.5 amps. The solenoid opens the shut-off
valve when battery voltage is applied to the valve.
Once opened, pressurized air from the AIR
pump flows past the check valve and is directed
into the bank 1 exhaust manifold through an
outlet pipe. The shut-off valve prevents fresh air
from being drawn into the exhaust manifold by
providing a positive seal when the AIR system is
inactive. The solenoid, valve, and outlet pipe are
serviced as an assembly.
4.2L Air Injection Diverter Valve Pictures


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