Secondary Air Injection Combination Valve, Checking
The following procedure is used to test all combination valves.
Special tools and workshop equipment required
- Hand vacuum pump.
Test conditions
- Vacuum lines and hose connections free of leaks.
- Vacuum lines not plugged.
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 --
Final procedures
After the repair work, the following work steps must be performed in the following sequence:
- Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
- If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
- If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .