312000621 - K021 FUEL RESERVE WARNING LIGHT NOT WORKING

With the ignition ON, the fuel reserve warning light does not come on when the tank is at the reserve level
N.B: The fuel level message is provided by the Body Computer Node and made available to the Instrument Panel Node via the B-CAN.The "Body Computer Node" also sends the fuel level sensor error message
Test results
1CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
Connect the Examiner diagnostic equipment to the diagnostic socket.Check that there are no faults in the Body ComputerMove on to Step 2Sensor with broken circuit, sensor short circuited, value implausible/not consistent with actual fuel levelContinue as instructed by the diagnostic equipment
2CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
Keeping the Examiner equipment connected to the diagnostic socket, check the operation of the fuel reserve warning light in active diagnosisMove on to Step 3The warning light does not come on.Replace the instrument panel    Op. 5560B10 CONTROL PANEL - R+R
3CHECK FUEL LEVEL SENSORAll OKProblems encounteredOperation
Check fuel level sensor operationMove on to Step 4Sensor not working.Replace the fuel pump assembly    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
4ELECTRICAL CIRCUIT CHECKAll OKProblems encounteredOperation
Check the continuity/insulation of the lead between fuel level sensor and Body Computer    See E4010 INSTRUMENT PANEL Move on to Step 5Cables broken/not insulated.Restore cable continuity/insulation    See E4010 INSTRUMENT PANEL
5CORRECT OPERATION CHECKAll OKProblems encounteredOperation
Check that the fault is no longer presentEnd of diagnosisThe fault persistsReplace Body Computer    Op. 5505A32 BODY COMPUTER - R.R