102C00

The signal from component B76 (Fuel filter condensation sensor) is faulty.


Possible cause:

- B76 (Fuel filter condensation sensor)
Affected functions:

- Power generation

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Test 1: Check component B76 (Fuel filter water level sensor).

1. Check component B76 (Fuel filter water level sensor).
Voltage supply of component B76 (Fuel filter water level sensor)
Figure legend

- B76 (Fuel filter water level sensor)
Special tool

- Adapter cable646 589 00 63 00
Test sequence

- Switch off ignition.
- Detach coupling at component B76 (Fuel filter water level sensor).
- Connect adapter cable no. 646 589 00 63 00 to engine wiring harness B76 (Fuel filter water level sensor).
- Measure direct voltage with multimeter between sockets (B76x1) 1 and (B76x1) 3
- Switch on ignition.
Specified value

- Voltage[11...14] V
Question

- Is the measurement value OK?







YES
Signal cable of component B76 (Fuel filter water level sensor)
Figure legend

- B76 (Fuel filter water level sensor)
Special tools

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

- Switch off ignition.
- Unplug connector of control module and component.
- Connect 126-pole socket box at engine wiring harness.
- Measure resistance with multimeter between socket (M.92) 92 of the 126-pole socket box tester and socket (B76x1) 2
Specified value

- Resistor< 1ohms
Question

- Is the measurement value OK?







YES
The measurement value is OK.Possible cause and remedy

- Replace component B76 (Fuel filter water level sensor).
End of test

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

- Repair / replace faulty wiring between N3/9 (CDI control unit) and B76 (Fuel filter water level sensor)
End of test

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

- Check voltage supply lines of component B76 (Fuel filter water level sensor) as per wiring diagram.
End of test