Manufacturer Code Charts: 164100

Component 'M3 (Fuel pump)' has an internal fault.


Possible cause:

- M3 (Fuel pump)
Affected functions:

- Power generation

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Test 1: Signal wire Check component M3 (Fuel pump).

1. Signal wire Check component M3 (Fuel pump).

Test 1.1: Arrangement of fuses F4 (Load compartment fuse and relay box)

Test 1.2: Arrangement of relays F4 (Load compartment fuse and relay box)

Test 1.3: Guided test

Test 1.4: Test relay F4kO (Fuel pump relay).

1.1. Arrangement of fuses F4 (Load compartment fuse and relay box)
Note

- WIS is not available on this system.
- It is not possible to display the requested WIS document [ gf5415p125614gm ].
- You can start WIS on another system and display the WIS document by entering the document number [ gf5415p125614gm ] in the 'Contents' field.


1.1. No further information available.


1.2. Arrangement of relays F4 (Load compartment fuse and relay box)
Note

- WIS is not available on this system.
- It is not possible to display the requested WIS document [ gf5415p125708gm ].
- You can start WIS on another system and display the WIS document by entering the document number [ gf5415p125708gm ] in the 'Contents' field.


1.2. No further information available.


1.3. Guided test
Signal wire Open circuit
Figure legend

- F4 (Load compartment fuse and relay box)
Special tools

- Test cable 266 589 01 63 00
- Socket box 129 589 00 21 00
Test sequence

- Switch off ignition.
- Connect 126-pole socket box at engine wiring harness.
- Remove relay F4kO (Fuel pump relay).
- Measurement is performed at the contact slot of component F4kO (Fuel pump relay).
- Measure resistance with multimeter between socket (F.17) 113 of the 126-pole socket box tester and socket (F4kO) 2
Specified value

- Resistor< 1,5ohms
Question

- Is the measurement value OK?













YES
The measurement value is OK.Possible cause and remedy

- In the event of stored faults with a high fault frequency count or in the event of customer complaints, check lines and connectors for loose contact and corrosion..
- Test relay F4kO (Fuel pump relay), replace if necessary.
End of test

NO
The measurement value is not OK.Possible cause and remedy

- Test wiring/ plug connection.
End of test

1.4. Test relay F4kO (Fuel pump relay).
Question:Was vehicle produced up to 31.05.2006?

YES
Test prerequisites

- Power supply (circuit 30) is OK.
Test sequence

- Measure resistance with multimeter between pins (F4kO)30 and (F4kO) 87
- Connect terminal 85 of relay F4kO (Fuel pump relay) with ground.
- Connect terminal 86 of relay F4kO (Fuel pump relay) with plus.
Specified value

- Resistor:< 3ohms
Figure legend

- F4:F4 (Load compartment fuse and relay box)
- f20-f72:Fuses
- K-T:Relays
Note: Connector assignment with key F7Question

- Is the measurement value OK?













YES
The measurement value is OK.Possible cause and remedy in the case of complaint

- Check contacts at component F4kO (Fuel pump relay) for loose contact.
- Check line between component F4 (Load compartment fuse and relay box) and ground Z204/4 (Circuit 31 right footwell voltage distributor connector) as well as its attachment and contact.
- Replace component F4 (Load compartment fuse and relay box).
End of test







NO
The measurement value is not OK.Possible cause and remedy

- Component F4kO (Fuel pump relay) is defective.
Figure legend

- F4:F4 (Load compartment fuse and relay box)
- f20-f72:Fuses
- K-T:Relays
End of test







NO
Test prerequisites

- Power supply (circuit 30) is OK.
Test sequence

- Measure resistance with multimeter between pins (F4kO)30 and (F4kO) 87
- Connect terminal 85 of relay F4kO (Fuel pump relay) with ground.
- Connect terminal 86 of relay F4kO (Fuel pump relay) with plus.
Specified value

- Resistor:< 3ohms
Figure legend

- F4:F4 (Load compartment fuse and relay box)
- f20-f72:Fuses
- K-T:Relays
Note: Connector assignment with key F7Question

- Is the measurement value OK?













YES
The measurement value is OK.Possible cause and remedy in the case of complaint

- Check contacts at component F4kO (Fuel pump relay) for loose contact.
- Check line between component F4 (Load compartment fuse and relay box) and ground Z204/4 (Circuit 31 right footwell voltage distributor connector) as well as its attachment and contact.
- Replace component F4 (Load compartment fuse and relay box).
End of test







NO
The measurement value is not OK.Possible cause and remedy

- Component F4kO (Fuel pump relay) is defective.
Figure legend

- F4:F4 (Load compartment fuse and relay box)
- f20-f72:Fuses
- K-T:Relays
End of test