Vacuum Supply and One-Way Valve, Testing

Vacuum Supply and One-Way Valve, Testing







- Detach hose -B- from two-way valve (N63) and connect vacuum gauge VAG1368 (or equivalent) to hose.
- Start engine and run at idle until the readout has stabilized.
- Switch off engine. Vacuum reading on gauge must not drop by more than 50 mbar within 2 minutes.


NOTE:
- Specification for vacuum when engine running: greater than 250 mbar.
- Removing and installing vacuum reservoir and one-way valve.
- Testing -N63-, output Diagnostic Test Mode (DTM).