2427576 - K121 ENGINE OIL PRESSURE FAULT DISPLAY
The display shows the engine oil pressure failure; engine oil pressure is normal. | The engine oil pressure fault and engine oil pressure sensor fault messages are made available on the C-CAN network by the Engine Control Node . They are also made available on the B-CAN network and hence the instrument panel node via a gateway. |
| Results of the tests | ||||
| 0 | PRELIMINARY CHECK | All OK | Problems met | Operation |
|---|---|---|---|---|
| With key on, check for an engine oil pressure sensor fault message. | Continue to Step 2 | Fault message present | Continue to Step 1 | |
| 1 | CHECKING WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
Connect the Examiner and check the body computer node for:
| Continue to Step 2 | Fault present in the engine management control unit; | Continue as instructed by the tester | |
| 2 | CHECK WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
Connect the Examiner to the tester input and check the body CAN Network information:
| Continue to Step 3 | Presence of faults in the CAN network | Continue as instructed by the tester | |
| 3 | CHECKING SENSOR | All OK | Problems met | Operation |
| Check that the sensor is connected to earth with the engine running and in open circuit with the engine off | Continue to Step 4 | Sensor faulty | Replace sensor . | |
| 4 | CHECKING ELECTRICAL EQUIPMENT | All OK | Problems met | Operation |
| Check insulation of the connection between sensor and engine control unit | Continue to Step 5 | Connection short-circuited to earth | Renew the electrical connections See E4010 INSTRUMENT PANEL | |
| 5 | CHECK WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
| Conect the Examiner or keep it connected and check the plausibility of the oil pressure parameter at the engine management control unit | Continue to Step 6 | Parameter not plausible | Replace the engine management control unit. | |
| 6 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
| Check that the fault is no longer present | End of diagnosis | Fault persists | Replace instrument panel. | |