Start Procedure

-- Remove the vacuum hose from the 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 combination valve should close and seal. Air should not be able to pass through the combination valve.

-- Operate the hand vacuum pump.

The combination valve should open. Air should be able to pass through the combination valve.

If combination valve does not open:

-- Replace the faulty combination valve. Refer to the Repair Information.