Engine Lubrication System Trouble in General: Inspection
WARNING: This page is about a different variant/trim than selected.
Before performing diagnosis, make sure that the engine oil level is correct and no oil leakage exists.
ENGINE LUBRICATION SYSTEM TROUBLESHOOTING
| Symptom | Possible cause | Corrective action | |
|---|---|---|---|
| 1. Warning light remains on. | a) Oil pressure switch failure | Cracked diaphragm or oil leakage within switch | Replace. |
| Broken spring or seized contacts | Replace. | ||
| b) Low oil pressure | Clogging of oil filter | Replace. | |
| Malfunction of oil by-pass valve in oil filter | Clean or replace. | ||
| Malfunction of oil relief valve in oil pump | Clean or replace. | ||
| Clogged oil passage | Clean. | ||
| Excessive tip clearance and side clearance of oil pump rotor and gear | Replace. | ||
| Clogged oil strainer or broken pipe | Clean or replace. | ||
| c) No oil pressure | Insufficient engine oil | Replenish. | |
| Broken pipe of oil strainer | Replace. | ||
| Stuck oil pump rotor | Replace. | ||
| 2. Warning light does not come on. | a) Malfunction of combination meter | Replace. | |
| b) Poor contact of switch contact points |
Replace. | ||
| c) Disconnection of wiring |
Repair. | ||
| 3. Warning light flickers momentarily. | a) Poor contact at terminals | Repair. | |
| b) Defective wiring harness | Repair. | ||
| c) Low oil pressure | Check for the same possible causes as listed in 1). - 2). | ||