SECONDARY AIR INJECTION (AIR) CONTROL VALVE INSPECTION

1. Remove the secondary air injection control valve. (See SECONDARY AIR INJECTION (AIR) CONTROL VALVE REMOVAL/INSTALLATION.)

2. Verify that there is no air flow between A and B of the AIR control valve port.

• If there is air flow, replace the AIR control valve. (See SECONDARY AIR INJECTION (AIR) CONTROL VALVE REMOVAL/INSTALLATION.)

3. Install the vacuum pump to the AIR control valve.

4. Pressurize the actuator valve of the AIR control with a negative pressure of approx. 60 kPa {0.61 kgf/cm², 8.7 psi}.

Caution

• Since the valve actuator of the AIR control could be damaged, do not pressurize positive pressure or negative pressure more than 100 kPa {1.02 kgf/cm², 14.5 psi}.

5. Blow air through port A, then verify that there is air flow.

• If there is no air flow, replace the AIR control valve. (See SECONDARY AIR INJECTION (AIR) CONTROL VALVE REMOVAL/INSTALLATION.)

6. Blow air from through port B, then verify that there is no air flow.

• If there is air flow, replace the AIR control valve. (See SECONDARY AIR INJECTION (AIR) CONTROL VALVE REMOVAL/INSTALLATION.)