| | Results
of the tests |
| 1 | CHECK HIGH TEMPERATURE SWITCH/SIGNAL | All OK | Problems met | Operation |
|---|
| Connect
the diagnostic equipment (Examiner or other instruments) to the
diagnostic socketCarry out active diagnosis of the maximum engine coolant temperature
warning light (through the engine management control unit) | Continue to Step 3 | Signal not present | Continue to Step 2 |
| Connections broken | Restore connection between switch and instrument See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 2 | CHECK TEMPERATURE SENSOR | All OK | Problems met | Operation |
|---|
| Check
the engine temperature sender unit See Test 1060E Checking engine coolant temperature sensor operation | Continue to Step 3 | Sensor faulty | Replace the sensor Op. 1060G14 |
| 3 | CHECK INSTRUMENT | All OK | Problems met | Operation |
|---|
| Check
the condition of the high engine coolant temperature warning light,
located in the instrument see DESCRIPTION AND OPERATION: 5560 INSTRUMENT PANEL | The warning lights consist of LEDs
built into the electronic circuit, and so CANNOT be replaced. |
| Continue to Step 4 | Instrument not working | Change the instrument Op. 5560B10 |
| 4 | CHECKING CORRECT OPERATION | All OK | Problems met | Operation |
|---|
| Check
that the fault is no longer present | End of diagnosis | Fault persists | Search for the
fault starting from another symptom' |