Fuel pump electrical, checking

Fig 1: Identifying Special Tools - Fuel Pump Electrical, Checking

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Special tools, testers and auxiliary items required

Test conditions

Fig 2: Identifying Main Fuse Panel

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Fig 3: Installed Location On 9-Socket Relay Carrier In Driver Footwell

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Vehicles with MPI engine: Fuel Pump (FP) Relay J17 - arrow - at position 1 in 9-socket relay carrier behind driver side storage compartment is OK.

Fig 4: Identifying Fuel Pump (FP) Control Module J538

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Vehicles with FSI engine: Fuel Pump (FP) Control Module J538 OK; checking → Fuel Pump (FP) Control Module J538 , checking (vehicles with 4-cyl. TFSI engine) .
Fuel filter OK
Ignition switched off.

Test sequence

Remove rear seat bench →
- 72 - SEAT - FRAMES
- 72 - SEAT - FRAMES for BODY INTERIOR - CABRIOLET
.

Fig 5: Removing Cover Bolts For Locking Flange

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Audi RS4:

Fig 6: Removing Electrical Wires With Connector From Locking Flange Opening

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Remove electrical wires with connector - arrow - from locking flange opening and lay them aside.

All:

Fig 7: Disconnecting Electrical Harness Connector At Right Locking Flange

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Fig 8: Connecting Other End Of Hand Held Remote Starter (Jumper) To Vehicle Battery (+)

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Connect remote control V.A.G 1348/3 A with connection V.A.G 1348/3-3 to contact - 1 - using an adapter cable from connector test set V.A.G 1594 C.
Using insulating tape, tape over the second contact of connection V.A.G 1348/3-3 to prevent a short circuit - arrow -.
Connect contact - 4 - to vehicle Ground (GND) using a jumper cable from the connector test set V.A.G 1594 C.
Connect alligator clip to vehicle battery (+).

NOTE:

Fuel Pump (FP) runs quietly. Avoid surrounding noises while testing the fuel pump.

If no operating noise can be heard:

Fig 9: Checking Electrical Circuit Between Terminals Of Fuel Delivery Unit And Fuel Pump For Continuity

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Check if electrical wiring between flange and fuel pump is connected and has continuity.

If no malfunction is detected in wires, Fuel Pump (FP) is faulty - replace fuel pump.