With Manufacturer's Scan Tool

Combi-valve, checking

Special tools and equipment





^ VAG 1390 Hand vacuum pump

Test conditions
^ Vacuum lines and hose connections free of leaks.
^ Pressure hose for secondary air injection pump motor not blocked or kinked.
^ Vacuum lines not blocked or kinked.
^ No DTC stored in DTC memory
^ Perform output Diagnostic Test Mode (DTM)
Refer to Powertrain Management

Test sequence

Note: Do not use compressed air during the following check!

- Remove engine cover.
- Remove intake hose between Mass Air Flow (MAP) sensor and throttle valve control module





- Pull vacuum hose off secondary air injection (AIR) solenoid valve -N112- and combi-valve -arrow-.





- Connect hand vacuum pump VAG 1390 to vacuum hose from combi-valve -arrow-.





- Disconnect pressure hose to combi-valve at coupling -arrow- and blow in using light pressure.
Combi-valve must be closed.
- Operate hand vacuum pump.
Combi-valve must open.
- When the combi-valve does not open or is continuously open
- Replace combi-valve.