Air Injection Control Valve: Testing and Inspection

CHECKING COMBI-VALVE AND CHECK-VALVE

Special Tools
^ US 8012 Hand vacuum pump or equivalent.




Procedure
- Disconnect vacuum hose -1- from Secondary Air Injection solenoid valve -2- (N112).
- Connect hand vacuum pump to vacuum hose -1-.
- Disconnect pressure hose (arrow) from Secondary Air Injection pump motor and route upwards.

CAUTION: Do not use compressed air for the following check.

- If necessary, extend pressure hose with an extension made of scrap hose and blow into it by mouth.

^ Valves must be closed.

- Operate hand vacuum pump.

^ Valves must be open.