- A) the oil level in the engine crankcase is correct (see «Oil level - check»);
- b) the engine is filled with oil in accordance with the factory operating instructions;
- V) the oil pressure sensor is working and its wire is open «mass». The integrity of the insulation of the sensor wire is checked visually. To check the sensor itself, replace it with a known good one and start the engine. If the control lamp continues to burn, then the sensor is working;
- G) there are no extraneous sounds coming from the engine (knocks, rattle), indicating cranking of the connecting rod or main bearings or a malfunction of the oil pump.
You will need a pressure gauge to do the job.
Execution sequence
1. We prepare the car for work (see «Preparing the car for maintenance and repair»). Remove engine trim (see «Decorative overlay of the engine - removal and installation»).
2. We start the engine and warm it up to operating temperature.
3. After turning off the engine, remove the emergency oil pressure sensor (see «Emergency oil pressure sensor - replacement»).
4. We wrap the pressure gauge tip into the sensor bore.
5. We start the engine and check the oil pressure at idle and at a crankshaft speed of about 5400 min-1.
Comment. For a serviceable engine warmed up to operating temperature, the oil pressure at idle speed must be at least 196.2 kPa (2 bar), and the oil pressure at a high crankshaft speed is 441.3-637.4 kPa (4,5-6,5 bar). If the pressure is below normal, then the engine needs a major overhaul. If the oil pressure at high engine speeds is higher than normal, then the safety valve is probably faulty (reduction) oil pump valve.
6. At the end of the test, install the sensor in place (see «Emergency oil pressure sensor - replacement»).
7. Install a decorative trim on the engine.