939003710 - N009 TRIP COMPUTER WRONG INDICATIONS

the trip computer indicates incorrect fuel consumption
1TRIP COMPUTER SIGNALS CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the speed signal is working properly    See E4080 TRIP COMPUTER Check the fuel level gauge is working properly by    See Test 1040AC FUEL LEVEL GAUGE CHECKMove on to Step 21. Speed signal interrupted1.Restore continuity
2.Fuel level signal does not conform2. Replace fuel level gauge    Op. 1040A66 FUEL LEVEL GAUGE FOR SUBMERGED PUMP ASSEMBLY - REPLACE.
3. Level signal interrupted3.Restore continuity
2CHECK ON CORRECT OPERATIONALL OKPROBLEMS ENCOUNTEREDACTION
Check that the fault is no longer presentEnd of diagnosis