Checking fuel system pressurisation pump G6/fuel pump G23, vehicles with 3.0 ltr. (V6) or 4.2 ltr. (V8) engine up to 05.2010 — AUDI

🧭 Before you start

Fits: Audi Q7 (4L, 2005–2015)

• Special tools named: V.A.G 1348/3

Don't miss

• Ignore other items.
• If necessary, lengthen fuel supply hose with an auxiliary hose.
• 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. [Note: Vehicles from 09.2008 onwards with engine code CCMA, CATA; vehicles from 06.2009 onwards with engine code CCFAConnect remote controlV.A.G 1348/3A to left terminal (arrow 1) of socket of fuse for fuel pump with adapter cable V.A.G 1348/3-3.Tape off 2nd connector contact (arrow 2) of adapter cable V.A.G 1348/3-3 with insulating tape to prevent short circuits.] [Note: Lay a clean cloth under the separating point to catch escaping fuel.]
7. ⚠ Observe rules for cleanliness when working on the injection system . — Disconnect fuel supply hose (1) from fuel filter. [Note: Ignore other items.]
8. Hold end of detached fuel supply hose (arrow) into measuring container. [Note: If necessary, lengthen fuel supply hose with an auxiliary hose.]
9. Press remote control button for 15 seconds.
10. 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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