Checking Fuel Pump Delivery Rate

> 9900 - PIWIS tester 3 must be connected and switched on.
Switch on ignition (fuel pump is activated briefly).
Drain the canister.
Test the fuel pump delivery rate using > 9900 - PIWIS Tester 3 .
1. 4.1 Select the Diagnostics function.
2. 4.2 Select the DME control unit in the control unit overview.
3. 4.3 Switch to the Drive links/checks menu item.
4. 4.4 Select the Drain fuel tank function and press F12 = Next.
5. 4.5 Have a stopwatch ready.
6. 4.6 Activate the Drain fuel tank (= activate fuel pump) function by pressing F8 = Start. Activate the stopwatch.
7. 4.7 After 30 seconds, deactivate the Drain fuel tank function by pressing F8 = Stop.
  1. 4.7.1 Exit the function.
8. 4.8 Read off the delivery rate.
  1. 4.8.1 Guide hose out of the canister.
  2. 4.8.2 Pour the fuel from the canister into the measuring cup and read off the fuel quantity.
    Setpoint value for 30 seconds: 1.5 litres
9. 4.9 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 tube.