Outline
The oil pump has a mechanism for feedback control of oil pressure. As a result, an oil pressure increase of more than the set pressure is suppressed and oil pump drive resistance is reduced. In addition, because the set pressure can be changed (oil pressure two-step control) by operating the engine oil solenoid valve, the oil pump drive resistance is reduced even during low speed/low to medium loads.
Purpose, Function
The oil pump suctions the engine oil in the oil pan through the oil strainer and pumps engine oil into the engine.
Construction
The oil pump is installed on the lower part of the cylinder block (in oil pan).

With the adoption of the chain drive type oil pump, the diameter of the rotor is reduced. As a result, the oil pump drive resistance has been reduced.
The oil pump consists of the following parts:

The relief valve and bypass valve is pushed and opened if oil pressure increases excessively when starting an extremely cold engine. As a result, the engine oil flows and excessive oil pressure increase is suppressed.
When the relief valve is pushed and opened, engine oil flows. As a result, the oil pressure decreases and the oil pump drive resistance is reduced.

Operation
The oil pump adjusts oil pressure in two steps (low oil pressure setting, high oil pressure setting) by switching the oil passage with the operation of the engine oil solenoid valve. For the operation condition of the engine oil solenoid valve, refer to CONTROL SYSTEM..
When the engine oil solenoid valve is turned ON, oil pressure is also applied to the upper part of the pilot valve. Because the oil pressure applied to the upper and lower parts of the pilot valve is almost same, the pilot valve is pressed up by the spring force.
Oil pressure is applied to the upper part of the relief valve.
When oil pressure exceeds the relief valve opening pressure, the relief valve is pressed down and engine oil flows. (oil pressure decrease)
When oil pressure is less than the relief valve opening pressure, the relief valve closes. As a result, engine oil flowing stops (oil pressure increase).
Oil pressure is adjusted by repeating Step (c) to (d).

When oil pressure exceeds the pilot valve opening pressure, the pilot valve is pressed up and oil pressure is applied to the upper part of the relief valve.
Because the relief valve opening pressure is exceeded by applying oil pressure to the upper part of the relief valve, the relief valve is pressed down and engine oil flows (oil pressure decrease).
When oil pressure is less than the pilot valve opening pressure, the pilot valve closes. As a result, the relief valve closes and engine oil flow stops (oil pressure increase).
Oil pressure is adjusted by repeating Step (b) to (c).

Oil Pump [Fw6 A EL, Fw6 Ax EL]
Oil Seal (Control Valve Body) Replacement [Fw6 A EL, Fw6 Ax EL]When Liftgate Cannot be Opened
When Liftgate Cannot be Opened
If the vehicle battery is dead or there is a malfunction in the electrical system
and the liftgate can not be opened, perform the following procedure as an emergency
measure to Open it: 1. Remove the cap on the interior surface of the liftgate with
a flathead sc ...
Knock Sensor (Ks) Removal/Installation
1. Disconnect the negative battery cable..
2. Remove the plug hole plate..
3. Remove the intake manifold..
4. Disconnect the KS connector.
5. Remove the KS..
6. Install in the reverse order of removal.
KS Installation Note
Verify that there is no foreign matter caught between ...
Engine Coolant Temperature (ECT) Sensor Inspection
Resistance Inspection
WARNING:
When the engine is hot, it can badly burn. Turn off the engine and wait until
it is cool before removing the ECT sensor.
ECT Sensor No.1
1. Remove the ECT sensor No.1..
2. Place the ECT sensor No.1 in water with a thermometer, and heat the water
...