With Manufacturer's Scan Tool

Combination valve, checking

Special tools, equipment, test and inspection devices; required accessories





- VAG 1331 torque wrench (5 - 50 Nm) or equivalent





- VAG 1390 manual vacuum pump

Test conditions
- No error in fault memory
- Output diagnostic test mode completed
- Vacuum lines and hose connections tight
- Vacuum lines not clogged or kinked

Test sequence
- Remove damping pans
- Pull vacuum hose off combination valve on secondary air valve -N112-.





- Connect VAG 1390 manual vacuum pump on vacuum hose to combination valve.

Note: Do not use any compressed air in the following test!





- Remove intake hose to combination valve on top of air filter -arrow- and blow in with low pressure.
The combination valve must be closed.
- Start hand pump.
The combination valve should open.
If the combination valve does not open:
- Replace combination valve.