Test Procedure

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start procedure

-- Remove the vacuum hose from the Secondary Air Injection Combination Valve --.

-- Connect hand vacuum pump to combination valve vacuum connection.

-- Remove the air duct hose from the Throttle Valve Control Module -J338- and position aside.

-- Disconnect the Secondary Air Injection hose.

-- Inject a light air pressure into the in Secondary Air Injection hose to close the combination valve. (do not use compressed air).

The Secondary Air Injection Combination Valve -- should close and seal. Air should not be able to pass through the valve.

-- Operate the hand vacuum pump.

The Secondary Air Injection Combination Valve -- should open. Air should be able to pass through the valve.

If combination valve does not open:

Replace the Secondary Air Injection Combination Valve --