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Checking the fuel pump voltage supply (VW Golf 4)

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  • Checking the fuel pump voltage supply
            0


Contents: Execution order ↓ Execution order ↓
The fuel pump is located in the fuel tank.

Warning: Gasoline is extremely flammable and explosive, so care must be taken when working on any part of the fuel system.


Warning: Work on the fuel system must be carried out in a well-ventilated area.


Warning: When working on the fuel system, do not use open flames, electric welding or tools that may generate sparks.


The fuel system is under constant pressure. When disconnecting the fuel system components, fuel may spray out, so collect the escaping fuel with a rag.

When checking, the voltage on the battery must be at least 11.5 V.

Execution order



1. Check the condition of fuse #28 for the fuel pump. Replace the fuse if necessary.

2. When the starter is turned on, the fuel pump should turn on for at least 1 second. When the fuel pump is running, a characteristic noise should be heard.

3. If the fuel pump does not work, connect the remote control according to the diagram shown in the figure Remote fuel pump testing.

4. Press the remote control switch. If the fuel pump still does not work, check the fuel pump relay.

If the pump does not work, follow these steps:

Execution order



1. Remove the rear seat and fold back the carpet to access the fuel level sensor and fuel pump flange.

2. Disconnect the electrical connector from the fuel level sensor and fuel pump.

2. Disconnect the electrical connector from the fuel level sensor and fuel pump.


3. Connect a tester or LED probe to the outer contacts of the electrical connector.



4. If voltage is present at the electrical connector contacts, remove the fuel pump.

5. Check the electrical circuit between the fuel pump mounting flange and the fuel pump. Also check the condition of the electrical connector contacts.

6. If the fuel pump electrical circuit is OK, then the fuel pump is faulty and needs to be replaced.

7. Install the fuel pump and fuel level sensor into the fuel tank.

This article is available at russian, bulgarian, belarusian, ukrainian, serbian, croatian, romanian, polish, slovak, hungarian
The text has been checked: Kolesnikov Artem

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Previous articles
Remote fuel pump testing
Removal and installation the air filter housing
Adjusting the accelerator cable
Removal and installation the fuel filter (petrol engines)
Removal and installation the fuel pump/fuel level sensor
Fuel tank of cars with gasoline engines
Next articles
Checking the performance of the fuel pump
Checking the fuel pump relay


Similar articles from other manuals for VW cars:
Checking the voltage supply to the fuel injectors Passat B5 (1996-2005)
Checking the fuel pump Polo 3 (1995-2003)
Checking the amount of fuel injected (petrol engine) Touareg 1 (2002-2006)
High pressure fuel pump Tiguan 1 (2007-2015)
Checking the performance of the fuel pump Sharan 1 (1995-2000)
Checking for voltage at the fuel pump Transporter T4 (1990-2003)
Checking and adjusting the fuel supply by the accelerator pump Beetle (1960-1986)
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