3360272 - K25 ENGINE COOLANT TEMPERATURE GAUGE NOT WORKING

With the ignition ON, the engine coolant temperature gauge in the instrument panel is not working;
the engine temperature signal and the engine temperature sensor failure signal is made available by the 'engine management node' at the C-CAN network; the 'body computer node' makes the message available through the gateway at the B-CAN network and then at the instrument panel.
Results of the tests
0PRELIMINARY CHECKAll OKProblems metOperation

Check that with the engine started up:

  • That the engine temperature sensor failure message is not present and that the engine management warning light is not on
Continue to Step 2Presence of failure messages and/or warning light onContinue to Step 1
1CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation

Connect the Examiner diagnostic equipment to the diagnostic socket and check:

  • that there are no faults at the engine management node
Continue to Step 2Anomalies presentContinue following the instructions for the diagnostic equipment
2CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation

Connect the Examiner diagnostic equipment to the diagnostic socket and check at the instrument panel node:

  • the operation of the indicator through active diagnosis.
Continue to Step 3Indicator not workingReplace instrument panel Op. 5560B11
3CHECKING CORRECT OPERATIONAll OKProblems metOperation
1.2 16v 1.6 16v 1.8 16v 2.4 20vCheck that the fault is no longer presentEnd of diagnosisFault persistsReplace the engine management control unit Op.   1056B82 
1.9 JTD 8vCheck that the fault is no longer presentCheck that the fault is no longer presentReplace the engine management control unit Op. 1060A80Search for the fault starting from another symptom'