Checking fuel system pressurisation pump G6/fuel pump G23, vehicles with 6.0 ltr. (V12) engine — AUDI

🧭 Before you start

Fits: Audi Q7 (4L, 2005–2015)

• Special tools named: V.A.G 1348/3

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• Lay a clean cloth under the separating point to catch escaping fuel.
• Voltage at fuel pump with engine stationary and pump running is approx. 2 volts less than battery voltage.

🔧 Engine codes this applies to

📋 Procedure

1. Remove filler cap from fuel filler neck.
2. Open plenum chamber cover (item 1) on left above electronics box.
3. Turn quick-release fasteners (1, 3, 4) 90° anti-clockwise (arrows).
4. Remove cover (2) for relay and fuse holder.
5. Pull fuses for the two fuel pumps out of relay and fuse holder in electronics box in plenum chamber (left-side) .

6. Connect remote controlV.A.G 1348/3A to left terminals (arrow 1) and (arrow 2) of sockets of the two fuses for the fuel pumps with adapter cable V.A.G 1348/3-3.
7. Release retaining clip and open cover above positive terminal (A).
8. Connect crocodile clip to positive terminal.
9. Remove engine cover panel (arrows). [Note: Lay a clean cloth under the separating point to catch escaping fuel.]
10. ⚠ Observe rules for cleanliness when working on the injection system . — Release hose clip and detach fuel supply hose (1) from fuel tank.
11. Lengthen fuel supply hose with an auxiliary hose (arrow) and hold end of hose in measuring container.
12. Press remote control button for 15 seconds.
13. Compare amount of fuel delivered with minimum delivery shown in diagram (cm3/15 sec.). [Note: Voltage at fuel pump with engine stationary and pump running is approx. 2 volts less than battery voltage.] [Note: With this test the fuel filter is not checked for any obstructions. If necessary, check the filter separately.]

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