Symptom Troubleshooting Index
ENGINE LUBRICATION SYSTEM TROUBLESHOOTING CHART
| Symptom |
Diagnostic procedure |
Also check for |
| Excessive engine oil consumption |
- Verify that the engine oil filler cap, oil drain bolt, and the oil filter are tight.
- Check for oil leaks.
- Check for worn valve guide(s) (see
VALVE INSPECTION
) or worn valve stem seal(s) (see
VALVE INSPECTION
).
- Check for damaged or worn piston ring(s) (see
REASSEMBLY
).
- Check for damaged or worn engine internal parts (cylinder wall, pistons, etc.) (see
STRAIGHTNESS
).
|
Check the maintenance records, worn out engine oil will burn off at a higher rate |
| Low oil pressure indicator stays on |
- Check the engine oil level (see ENGINE OIL LEVEL CHECK
).
- Do the low oil pressure indicator circuit troubleshooting (Short) (see LOW OIL PRESSURE INDICATOR CIRCUIT TROUBLESHOOTING (SHORT)
).
|
A wire shorted to ground between the ECM/PCM and the oil pressure switch |
| Low oil pressure indicator does not come on with the ignition switch in ON (II) |
- Do the low oil pressure indicator circuit troubleshooting (Open) (see LOW OIL PRESSURE INDICATOR CIRCUIT TROUBLESHOOTING (OPEN)
).
- Test the oil pressure switch (see OIL PRESSURE SWITCH TEST
).
|
An open in the wire between the ECM/PCM and the oil pressure switch |