Purpose, Function
The oil cooler routes engine oil and engine coolant through the interior and disperses the engine oil heat using the engine coolant. As a result, the oil temperature is maintained properly to reduce the engine oil deterioration.
Construction
A 9-layered type water-cooled has been adopted.
The oil cooler is attached to the oil filter body.

Oil Cooler [Fw6 A EL, Fw6 Ax EL]
Oil Filter ReplacementMass Air Flow (MAF) Sensor/Intake Air Temperature (Iat) Sensor No.1 Removal/Installation
NOTE:
Because the IAT sensor No.1 is integrated in the MAF sensor, replacing the
IAT sensor No.1 includes replacement of the MAF sensor/IAT sensor No.1.
1. Disconnect the negative battery cable..
2. Disconnect the MAF sensor/IAT sensor No.1 connector.
3. Remove the MAF sensor/IA ...
Fuel Pump Relay
Purpose, Function
Controls the fuel pump on/off according to control signals from the PCM.
The fuel pump is operated only at engine start or when the engine is running
to improve safety.
Construction
The fuel pump relay is installed in the relay and fuse block.
...
Operational Range
The system operates only when the driver is in the vehicle or within operational
range while the key is being carried.
NOTE
When the battery power is low, or in places where there are high-intensity
radio waves or noise, the operational range may become narrower or the system may
not operate ...