323000792 - K025 ENGINE COOLANT TEMPERATURE GAUGE NOT WORKING

With the ignition on, the engine coolant temperature gauge in the instrument panel is not working;N.B: the engine temperature signal and the engine failure temperature sensor are made available by the engine management node to the C-CAN; the body computer node makes the message available, via the gateway, at the B-CAN and therefore to the instrument panel.
0PRELIMINARY CHECKAll OKProblems encounteredOperation
Check that the engine management warning light is not on with the engine started.Move on to Step 3.Warning light on.Move on to Step 1.
1CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
Connect the Examiner equipment to the diagnostic socket.Check that there are no faults in the Engine Management Node.Move on to Step 2.Presence of faults.Continue as instructed by the diagnostic equipment.
2ENGINE TEMPERATURE SENSOR CHECKAll OKProblems encounteredOperation
Check that the engine temperature sensor is working properlyMove on to Step 3.Sensor defective.Replace the temperature sensor.    Op. 1056B50 ENGINE COOLANT TEMPERATURE SENSOR - R + R
3CHECK FOR ENGINE CONTROL FAULTSAll OKProblems encounteredOperation
The panel indicates errors not detected by the engine control unit.Move on to Step 4.Errors not identified by the engine management control unit.Proceed as instructed.    See K101 FUEL TEMPERATURE AND WATER IN FUEL FILTER SENSOR
4CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
Keeping the Examiner equipment connected to the diagnostic socket, check the operation of the pointer in active diagnosis.Move on to Step 5.Pointer does not moveReplace the instrument panel.    Op. 5560B10 CONTROL PANEL - R+R
5ELECTRICAL CIRCUIT CHECKAll OKProblems encounteredOperation
Check the continuity/insulation of the connection between the engine coolant temperature sensor and the engine management control unitMove on to Step 6.Cables broken/not insulated.Restore cable continuity/insulation
6CORRECT OPERATION CHECKAll OKProblems encounteredOperation
Check that the fault is no longer present.End of diagnosis.The fault persists.Replace Body Computer.    Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R.