Air Diverter Valve: Testing and Inspection

Chart C-6:

Chart C-6 Wiring Diagram:

CIRCUIT DESCRIPTION:
This system uses a single bed converter and air management is controlled by an air control valve (divert valve). When grounded by the ECM, the solenoid causes the valve to direct air to the exhaust ports. When de-energized air diverts to the atmosphere, air will go to the ports provided the valve has a ground to the ECM and good manifold vacuum.

TEST DESCRIPTION: The numbers below refer to circled numbers on the diagnostic chart.

1. This is a system performance test. When vehicle goes to "CLOSED LOOP," air will switch from the ports to divert.

2. Tests for a grounded electric divert circuit. Normal system light will be "OFF."

3. Checks for an open control circuit. Grounding "test" terminal will energize the solenoid if the ECM and circuits are normal. In this step, if test light is "ON," circuits are normal and fault is in the valve connection or valve.