Manufacturer Code Charts: 102900

The water content of the fuel filter has reached the upper limit value.


Possible cause:

- B76/1 (Condensation sensor for fuel filter with heating element)
Affected functions:

- Power generation

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Test 1: Check component B76/1 (Condensation sensor for fuel filter with heating element) for proper function.

1. Check component B76/1 (Condensation sensor for fuel filter with heating element) for proper function.

Test 1.1: Check component Fuel filter heater.

Test 1.2: Check component Water level sensor in fuel.

1.1. Check component Fuel filter heater.
Check component B76/1 (Condensation sensor for fuel filter with heating element) for proper function.
Test prerequisite

- Control unit N3/9 (CDI control unit) does not contain any fault codes or event codes concerning component N14/3 (Glow time output stage).
- Engine at idle
Test sequence

- Component B76/1 (Condensation sensor for fuel filter with heating element) will be actuated for 30 sec. after pressing button F3.
- Component B76/1 (Condensation sensor for fuel filter with heating element) is actuated clocked.
- The fuel temperature rises after approx. 6-8 s.
Move on to actuation with button F2

Warning!Communication with ECU required.


1.2. Check component Water level sensor in fuel.
Figure legend

- B76/1 (Condensation sensor for fuel filter with heating element)
- R48 (Two-disk thermostat heating element)
Possible cause and remedyWater in the fuel filter.Drain water from fuel filter.End of test