| STEP | OPERATIONS TO BE CARRIED OUT | TEST RESULTS |
|---|
| 0 | PRELIMINARY CHECKS | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| First, check:- the level of the coolant fluid
- that there are no localized leaks
- that there is no engine oil in the expansion tank
- that the cooling radiator is not distorted or faulty
- that the radiator is not dirty/blocked
| Move on to Step | 1. Level not correct | 1. Top up level |
| 2. Leaks detected | 2. Move on to the step involved |
| 3. Presence of engine oil | 3. Change the head gasket |
| 4. Radiator distorted | 4. Replace the radiator |
| 5. Radiator dirty/blocked | 5. Clean/wash the radiator See in Op. 1088A20 Engine cooling SYSTEM - Wash interior |
| 1 | PLUG SEAL CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check the seal of the expansion tank cap | Move on to Step | Cap defective | Replace the cap |
| 2 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Connect the diagnostic test equipment (Examiner or other instruments) to the diagnostic socket:- Detect that there are no errors memorized
- Carry out the active diagnosis of the fan
- Check the fan operating cycle
| Move on to Step | 1. Presence of errors in the control unit | 1. Proceed as instructed by the diagnostic tester |
| 2. Operation does not conform | Move on to Step |
| 3 | ENGINE COOLING ELECTRIC CIRCUIT CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check tha the fan power/control line is working properly (Wiring Diagram ) E5020 ENGINE COOLING | Move on to Step | Connections not correct | Move on to Step |
| 4 | FAN OPERATION CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Supply the fan directly and check its operation (Wiring Diagram ) E5020 ENGINE COOLING | Move on to Step | Fan not working | Replace the fan See in Op. 1088E10 Radiator cooling FAN - R.R. |
| 5 | THERMOSTAT OPERATION CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| - Bleed the cooling system
- Check that the thermostat is working properly
| Move on to Step | Thermostat not working | Replace the thermostat See in Op. 1088C30 THERMOSTAT UNIT - R.R. |
| 6 | WATER PUMP CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check that the water pump is working properly | Move on to Step | Pump faulty | Change pump See in Op. 1088C10 WATER PUMP - R.R. |
| 7 | COOLING SYSTEM LEAKAGE TEST | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check the seal of the cooling system See in Op. 0510C30 ENGINE COOLING SYSTEM - Leakage test | Move on to Step | 1. Faulty seal with visible leaks | 1. Eliminate leaks |
| 2. Faulty seal without visible leaks | Move on to Step |
| 8 | HEAD HYDRAULIC SEAL CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check the hydraulic seal of the cylinder head See in Op. 1016E04 SINGLE CYLINDER HEAD or (one) left or right, removed - Hydraulic test | Move on to Step | Seal not efficient | Restore the seal, replace the head if necessary |
| 9 | MONOBLOC HYDRAULIC SEAL CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check the hydraulic seal of the monobloc | Move on to Step | Seal not efficient | Restore the seal, replace the monobloc if necessary |
| 10 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check that the fault is no longer present | | | |