Fuel pump electrical, checking

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

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Special tools, testers and auxiliary items required

Test conditions

Fig 2: Identifying Main Fuse Panel

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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 Electrical Harness Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

Test sequence

Sedan:

Wagon:

Remove left 1/3 backrest →
- 72 - SEAT - FRAMES
- 72 - SEAT - FRAMES for BODY INTERIOR - CABRIOLET
.
Remove left side luggage compartment trim and dirt tray →
- 70 - INTERIOR TRIM
- 70 - INTERIOR TRIM for BODY INTERIOR - CABRIOLET
.

All models:

Fig 5: Unbolting Cover For Locking Flange In Luggage Compartment

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Fig 6: Disconnecting Electrical Harness Connector At Locking Flange

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Fig 7: Connecting Other End Of Hand Held Remote Starter (Jumper) To Vehicle Battery (+)

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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 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.

Fig 8: Checking Electrical Circuit Between Terminals Of Fuel Delivery Unit And Fuel Pump For Continuity

Courtesy of VOLKSWAGEN UNITED STATES, INC.

If no operating noise can be heard:

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 wires, Fuel Pump (FP) is faulty - replace fuel pump.