Symptoms And Causes: Inspection
Before performing diagnostics, make sure that the engine oil level is correct and no oil leakage exists.
| Symptoms | Problem parts etc. | Possible cause |
|---|---|---|
| The oil pressure warning light illuminates. | Oil pressure switch | Oil pressure switch failure |
| Oil filter | Clogging of oil filter, malfunction of by-pass valve | |
| Oil strainer | Clogging of oil strainer | |
| Engine oil passages | Clogging of engine oil passage | |
| Oil pump | Wear or damage of the oil pump | |
| Engine oil | Incorrect engine oil or engine oil deterioration | |
| Wiring harness | Short circuit of wiring harness | |
| The oil pressure warning light does not illuminate. | Combination meter | Defective combination meter |
| Oil pressure switch | Oil pressure switch failure | |
| Wiring harness | Open circuit of wiring harness |