3308611 - D31 ENGINE OVERHEATING / WITH FAN NOT WORKING

The reading on the instrument in the panel shows a high engine coolant temperature and the cooling fan does not come on If not (the fan comes on normally)  See table D30  ENGINE OVERHEATING
Results of the tests
1CHECK OPERATION OF COOLING FANAll OKProblems metOperation
Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket and carry out active diagnosis on the engine cooling fans: (in the engine management control unit ambient) Continue to Step 4 Fault in electric fan operation Continue to Step 2
2CHECK ELECTRIC FAN(S)All OKProblems metOperation
2.0 TSCheck the condition and correct operation of the engine cooling fan Continue to Step 3 Electric fan faulty Replace electric fan Op.   1088E10 
2.0 TB 2.5 V6 3.0 V6 2.5 V6 CAE 3.0 V6 CAE 2.4 JTD 10vCheck the condition and correct operation of the engine cooling fans Continue to Step 3 Electric fans faulty Replace electric fans Op.   1088E11 
3FAN OPERATING CIRCUIT CHECKAll OKProblems metOperation

Check, in order:

  • fan fuses
  • fan engagment relays
  • fan resistances
  • connection between engine management control unit and fan relays
  • connection between fan relays and fans ( See   E5020  ENGINE COOLING ).
Continue to Step 4 Connections not correctRestore connections
Component defectiveReplace the component involved (if a fuse is involved, search for the cause of the problem)
4HECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'