With Generic Scan Tool

Combination valve, checking

Recommended special tools and equipment
- VAG1390 Hand Vacuum Pump

Test requirements
- No leaks in vacuum lines or hose connections.
- Vacuum hoses not clogged or kinked
- Pressure hose for Secondary Air Injection (AIR) Pump Motor not clogged or kinked

Test sequence

NOTE: Do not use pressurized air for the following test.







- Disconnect vacuum hose -1- at Secondary Air Injection (AIR) Solenoid Valve -N112- (-2-).







- Disconnect pressure hose -3- at Secondary Air Injection (AIR) pump motor and blow air in with light pressure (arrow).
Combination valve must close.

NOTE: To disengage, compress the buttons at the hose coupling.

- Operate vacuum pump. Combination valve must open.

If the combination valve does not open or it is constantly open:
- Replace combination valve, item 1.