FSCU2 (RIGHT)

The fuel pump has been switched off.

Test 1: Check power supply at control unit N118 (Fuel pump control module).

Test 2: Possible cause:

- N118 (Fuel pump control module)
Affected functions:

- Engine diagnosis
- Fuel system

1. Check power supply at control unit N118 (Fuel pump control module).
Possible cause and remedy

- Test fuse and replace if necessary.
-
Question

- Is fuse OK?


YES
Test prerequisite

- If other control units likewise signal overvoltage fault, then test generator and regulator.
-
Test sequence

- Switch on ignition.
- Unplug 4-pin connector from component N118/4 (Right fuel pump control unit).
- Unplug 4-pin connector from component N118/3 (Left fuel pump control unit).
- Measure direct voltage with multimeter between sockets (N118) 1.2 and (N118) 1.1
Specified values

- Voltage: [11.0 ... 14.5] V
Question

- Is the measurement value OK?







YES
The measurement value is OK.Further possible causes of fault

- Inspect plug connections for corrosion, pinched insulation and loose contact.
End of test

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

- Inspect lead of voltage supply to control module N118 (Fuel pump control module) if necessary for loose contact, damage and corrosion and repair.
End of test

NO
Replace faulty fuse.End of test

2. No further information available.