Secondary Air Injection Combination Valves, Checking for Function and Leaks

Secondary Air Injection Combination Valves, Checking for Function and Leaks

Special tools, testers and auxiliary items required

• Hand Vacuum Pump (VAS 6213)

Procedure

• Vacuum lines and hose connections free of leaks.

• Vacuum lines not plugged.

- Remove the vacuum hose - 1 - or - 2 - on the combination valve being checked.






- Connect the (VAS 6213) to the vacuum hose for the combination valve to be checked.

- Remove the front secondary air hose - arrow - from its bracket and disconnect it; to do so press the release buttons.

- Blow into the secondary air injection (AIR) hose using light pressure (do not use pressurized air). Lengthen the secondary air injection hose with an extension hose, if necessary.

• The secondary air injection combination valves must be closed. It must not be possible to blow through.

- Operate hand vacuum pump.

• The relevant combination valve must open, it must not be possible to blow through.

- If the secondary air combination valve does not open, replace it. Refer to => [ Secondary Air Injection Combination Valve ] Service and Repair.

Assembling

Assembly is performed in reverse order of removal, noting the following:

• Replace O-ring.