312000567 - D033 ELECTRIC FAN STAYS ON ALL THE TIME
| Test results | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
|---|---|---|---|---|
Check the following, in order:
| Move on to Step 1 | 1. Engine oil level not correct2. Oil leaks3. Coolant level not correct4. Coolant leaks5. Radiator blocked | 1. Top up to the correct oil level2. Eliminate leaks3. Top up level4. Eliminate leaks5. Descale radiator | |
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
| Connect the Examiner diagnostic equipment to the engine control unit. Check:
| Move on to Step 2 | 1. Error detected in the control unit2. Parameters not plausible | 1. Continue following the instructions on the diagnostic equipment2. Continue following the instructions on the diagnostic equipment | |
| 2 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
| Connect the Examiner diagnostic equipment to the climate control system control unit. Check:
| Move on to Step 3 | 1. Onset of the error detected in the control unit2. Parameters not plausible | 1. Continue following the instructions on the diagnostic equipment2. Continue following the instructions on the diagnostic equipment | |
| 3 | WATER TEMPERATURE SENSOR CHECK | All OK | Problems encountered | Operation |
| Check that the water temperature sensor is working properly by carrying out the See Test 1056BC ENGINE COOLANT TEMPERATURE SENSOR OPERATION CHECK | Move on to Step 4 | 1. Sensor defective2. Sensor wiring connection irregular | 1. Replace the sensorOp. 1056B50 2. Restore the correct connection. | |
| 4 | WIRING CHECK | All OK | Problems encountered | Operation |
| Check the continuity of the connections between the engine management control unit and fuse control unitCheck that the fan control relays are working properly See E5020 ENGINE COOLING | Move on to Step 5 | 1. Wiring defective2. Relays defective | 1. Restore the correct wiring.2. Replace the relays | |
| 5 | THERMOSTAT CHECK | All OK | Problems encountered | Operation |
| Check that the thermostat is working properly | Move on to Step 6 | Thermostat defective | Replace the thermostatOp. 1088C40 | |
| 6 | ENGINE CONTROL UNIT CHECK | All OK | Problems encountered | Operation |
| Check that the engine control unit is working properly | End of diagnosis | Engine management control unit defective | Replace the engine management control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R | |