Fuel pump electrical, checking

Special tools, testers and auxiliary items required 

• Remote control V.A.G 1348/3 A with adapter cable V.A.G 1348/3-2
• Multimeter V.A.G 1526 B or equivalent.
• Connector test set V.A.G 1594 C.

Test requirements 

Fig 1: Identifying Fuse Panel

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• Battery voltage at least 12.5 V.

Fig 2: Identifying Fuse Panel In Center Bracket Of Instrument Panel

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• Fuse 1 of right fuse panel in center bracket of instrument panel - 2  - is OK.

Fig 3: Removing Bolt And Pulling Oil Dipstick Guide Tube Upward And Out

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• Vehicles with MPI engine: Fuel Pump (FP) Relay -J17- in relay and fuse carrier, position - 2  - in left electronics box is OK.
• Vehicles with FSI engine: Fuel Pump (FP) Control Module -J538- OK; checking. → 20 - Fuel Supply Diagnosis and Testing
• Fuel filter OK.
• Ignition switched off.

Test sequence 

• Remove rear seat bench → 72 - Seat - Frames Removal And Installation .

Fig 4: Removing Cover Bolts For Locking Flange

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• Remove cover for right locking flange - arrows  -.

Fig 5: Disconnecting Electrical Harness Connector At Locking Flange

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• Disconnect electrical harness connector - arrow  - at locking flange.

Fig 6: Connecting Remote Control V.A.G 1348/3A With Adapter Cable V.A.G 1348/3-2 With An Adapter Cable From Connector Test Set V.A.G 1594C At Terminal

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• Connect remote control V.A.G 1348/3 A with connection V.A.G 1348/3-2 to contact - 1  - using an adapter cable from connector test set V.A.G 1594 C.
• Connect contact - 5  - to vehicle Ground (GND) using a jumper cable from connector test set V.A.G 1594 C.
• Connect alligator clip to vehicle battery positive (+).
• Press switch on remote control.

• Running noise of pump must be audible.

If no operating noise can be heard:

Fig 7: Checking Electrical Circuit Between Terminals Of Fuel Delivery Unit And Fuel Pump For Continuity

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• Remove fuel delivery unit. → Fuel delivery unit, removing and installing .
• Check if electrical wiring between flange and fuel pump is connected and has continuity.

If no malfunction is detected in wiring, Fuel Pump (FP) is faulty. Replace fuel pump.

• Install fuel delivery unit. → Fuel delivery unit, removing and installing .