Delivery Quantity

Delivery Quantity

- Remove rear seat bench.







- Remove cover - 1 - with fuel pump control module - 2 - from fuel delivery unit.







- Disconnect flange connector - A -.







- Place test instrument adapter/DSO (5-pin) VAS 5565 on the connector and on the fuel delivery unit.
- Connect remote control V.A.G 1348/3A to the test instrument adapter/DSO (5-pin) VAS 5565 and to battery plus (+).

NOTE: This allows the fuel pump to run when the engine is not running.

- Remove fuel filler cap from fuel filler tube.

CAUTION: Fuel supply line is under pressure. Wear protective goggles and protective clothing to prevent injuries and contact with skin. Before removing from hose connection wrap a cloth around the connection. Then release pressure by carefully pulling hose off connection.







- Disconnect supply line - arrow - and catch escaping fuel with a rag.

NOTE: Press in securing ring to disengage the fuel lines.







- Connect pressure gauge V.A.G 1318 with double connection V.A.G 1318/23 and adapter set V.A.G 1318/17 to fuel supply line.
- Connect hose adapter V.A.G 1318/16 to adapter V.A.G 1318/11 of pressure gauge and hold it in a measuring container.

CAUTION: Danger of spraying when opening shut-off valve; wear protective goggles and protective clothing to prevent injuries and contact with skin. Hold container in front of free connection of pressure measuring device.

- Open shut-off valve of pressure gauge set. Lever will point in direction of flow - A -.
- Operate remote control V.A.G 1348/3A. Slowly close shut-off tap, until pressure gauge shows 4 bar. From this point on do not move position of shut-off tap.
- Empty measuring container.







- Delivery rate of fuel pump is dependent on battery voltage. Connect the multimeter V.A.G 1715 to connectors - 1 and 5 - on the test instrument adapter/DSO (5-pin) VAS 5565.
- Operate the remote control for 30 seconds and simultaneously measure voltage at fuel pump.







- Compare quantity of fuel delivered with specification.
*) Minimum delivery rate cu.cm/30 s
**) Voltage at fuel pump with engine at stand still and pump running.

Example:
- During test, a voltage of 10.5 volts is measured. This results in a minimum delivery rate of approximately 580 cu.cm/30 s.

If specification is not obtained:
- Check fuel line for possible restrictions (kinks) or clogging.
- If no malfunction can be found, remove fuel pump and check filter strainer for dirt.If there is still no malfunction, replace flange with fuel filter.
- Repeat test.
- If specified value is again not obtained, replace fuel delivery unit.

If the delivery rate has been attained but a fuel supply system malfunction is still suspected, check the fuel pump current draw. Current Draw