Secondary Air Injection Combination Valve, Checking

Secondary Air Injection Combination Valve, Checking

The following procedure is used to test all combination valves.



Special tools, testers and auxiliary items 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 ] 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:

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] Diagnostic Modes 01 - 09.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Modes 01 - 09.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.