Fuel Filler Cap: Testing and Inspection

16 11 130 - Checking filler cap pressure relief valve





Special tools required:
- 13 3 010
- 16 1 171
- 16 1 172





Set pressure regulator on special tool 16 1 171 fully in "-" direction.

Connect special tool 16 1 171 via compressed air line (1) to workshop/garage compressed air system (8...10 bar).

Connect pressure sensor (2) from Diagnosis and Information System.

Connect special tool 16 1 172 to quick-connect coupling (3).





Install tank cap on special tool 16 1 172.





Note:
Only the absolute pressure is indicated in the display of the Diagnosis and Information System (DIS). The current ambient air pressure is already displayed without additional pressurization.





Check testing equipment for leaks.

Select "Measurement/ Pressure" function on Diagnosis and Information System (DIS).

Increase pressure by 0.2 bar with pressure regulator on special tool 16 1 171.

Using special tool 13 3 010, clamp off supply line from special tool 16 1 171.

Read off and note down pressure.

Wait 60 seconds.

Read off pressure again and compare with starting pressure value.

Measurement evaluation:










Check filler cap pressure relief!

Select "Measurement/ Pressure" function on Diagnosis and Information System (DIS).

Increase pressure by 0.3 bar with pressure regulator on special tool 16 1 171.

Using special tool 13 3 010, clamp off supply line from special tool 16 1 171.

Read off and note down pressure.

Wait 60 seconds.

Read off pressure value again and compare with starting pressure value.

Measurement evaluation: