System Description
SYSTEM DIAGRAM
| Component parts | Function |
|---|---|
| Crankshaft position sensor | Crankshaft Position Sensor . |
| Intake camshaft position sensor | Intake Camshaft Position Sensor . |
| Engine coolant temperature sensor 1 | Engine Coolant Temperature Sensor . |
| Engine oil temperature sensor | Engine Oil Temperature Sensor . |
| Battery | ECM receives the battery voltage signal. |
| ECM | ECM . |
| Engine oil pressure control solenoid valve | Engine Oil Pressure Control Solenoid Valve . |
SYSTEM DESCRIPTION
ECM performs the variable hydraulic control (low oil pressure control and high oil pressure control) based on signals from each sensor according to oil temperature and engine load. ECM activates the engine oil pressure control solenoid valve and switches to the low oil pressure control, intermediate oil pressure control, and high oil pressure control. The ECM uses the continuously variable solenoid valve, and the oil pump operation amount is reduced for leading to low fuel consumption by finely controlling the oil pressure with the hydraulic pressure sensor feedback control.
High oil pressure control start condition
- Extremely cold engine condition
- High engine speed
- Coolant temperature is 60 °C (140 °F) or more under high engine load condition
Low oil pressure control start condition
- Coolant temperature is less than 60 °C (140 °F) under low engine speed condition
- Coolant temperature is 60 °C (140 °F) or more under low engine load and low engine speed conditions