Air Injection Pressure Sensor/Switch: Testing and Inspection

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 are not leaking

• Vacuum lines are not plugged.

- Remove the engine covers - 1 and 2 - upward.






- Disconnect the vacuum hose - 2 - from the Secondary Air Injection (AIR) solenoid valve to be checked.






- 1 - secondary air injection solenoid valve for bank 1 (right side).

- 2 - secondary air injection solenoid valve 2 for bank 2 (left side).

- Connect the hand vacuum pump (VAS 6213) to the vacuum hose for the AIR solenoid valve to be checked.

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






- Blow into the hose for the combination valves using light pressure (do not use pressurized air).

• The AIR combination valves must be closed. It must not be possible to blow through.

- Operate the hand vacuum pump.

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

- If the AIR combination valve does not open, replace it, refer to the following:

=> [ Secondary Air Injection Combination Valve, Left ] Secondary Air Injection Combination Valve, Left.

=> [ Secondary Air Injection Combination Valve, Right ] Secondary Air Injection Combination Valve, Right.

Assembly is performed in the reverse order.