Checking Fuel Pump Delivery Rate
- Switch on and connect > 9900 - PIWIS Tester 3.
- Switch on ignition (fuel pump comes on briefly).
- Drain the canister.
- Test the fuel pump delivery rate using > 9900 - PIWIS Tester 3
.
- 4.1
Select the Diagnostics
function.
- 4.2
Select the Engine electronics
control unit in the control unit overview and press F12=Next to confirm your selection.
- 4.3
- 4.4
Under DME,
switch to the Drive links/checks
menu item.
- 4.5
Select Drive links
and press F12=Next to confirm.
- 4.6
Select the Fuel predelivery pump activation
function and press F12=Next to confirm.
- 4.7
Have a stopwatch ready.
- 4.8
Activate the Fuel predelivery pump activation
function by pressing F8=Next Activate the stopwatch at the same time.
- 4.9
After 30 seconds, deactivate the Fuel predelivery pump activation
function by pressing F8=Stop.
- 4.9.1
Exit the function.
- 4.10
Read off the delivery rate.
- 4.10.1
Guide hose out of the canister.
- 4.10.2
Pour the fuel from the canister into the measuring cup and read off the fuel quantity. Minimum supply rate for a measuring time of 60 seconds: 3 litres
- 4.11
Switch off ignition, switch off > 9900 - PIWIS Tester 3
and disconnect adapter line in the vehicle.
- Fill fuel from the canister into the fuel tank through the fuel filler pipe.