Checking Fuel Pressure
WARNING: This page is about a different variant/trim than selected.
WARNING:
Risk of damage to skin and eyes from toxic and caustic effects of fuel.
- → Wear personal protective gear when working with fuel.
- → In case of contact with skin or eyes wash immediately with plenty of warm water and acid-free soap.
- → Consult a doctor as soon as possible.
WARNING:
Highly inflammable or explosive materials
- Danger of fire or explosion
- → Avoid contact with hot parts or sources of ignition.
- → Use suction to remove ignitable vapours.
- → Attach warning sign in a clearly visible position.
- → Contain leaked media using non-flammable absorbent material and put it in a container designed for this purpose for disposal in accordance with local requirements.
- → Secure collection containers/vessels to prevent them from tipping over.
Information
- The battery voltage must not fall below 12.5 volts during the delivery rate/pressure check.
- > 9818 - PIWIS Tester II
must be connected to the vehicle.
Information
- There is no need to create a Vehicle Analysis Log (VAL).
- Select DME in the control unit search screen.
- Switch to the Drive links/checks menu item.
- Select the Drain fuel tank function.
- Activate the Drain fuel tank (= activate fuel pump) function by pressing F8 - Start.
- Read off the pressure shown on the pressure gauge.
Fuel pressure with engine stopped:
> Fuel pressure - engine not running 6.0 bar + 0.2 bar
- Deactivate the Drain fuel tank function by pressing F8 - Stop.
- Exit the function.
- Holding pressure test: System pressure must be approx. 4 bar after 20 minutes.
> Pressure 4.0 bar +/- 0.2 bar
- Switch off ignition, switch off > 9818 - PIWIS Tester II and disconnect adapter line in the vehicle.
- Fit cover for fuse carrier.