Outline
Changes the fuel pressure applied to the fuel injector according to engine operation conditions to improve engine output and startability.
The PCM determines the fuel pressure value corresponding to the engine operation conditions based on the each input signal, and drives the spill valve control solenoid valve for optimum control of fuel pressure.
Block Diagram

OPERATION
Directly after engine start
During a cold engine start, the fuel pressure is raised to promote fuel atomization.
Basic Control
The PCM determines the target fuel pressure according to charging efficiency and performs feedback control by monitoring the fuel pressure in the fuel delivery pipe using the fuel pressure sensor.
When idling after engine warm up: Approx. 3 MPa {31 kgf/cm2, 435 psi}
After engine warm up, engine speed is 3,000 rpm or more, charging efficiency is 60 % or more: Approx. 15.0 MPa {153 kgf/cm2, 2176 psi}
Fuel Tank
High Pressure Fuel Pump InspectionOil Cooler Removal/Installation
WARNING:
Hot engines and engine oil can cause severe burns. Turn off the engine and
wait until it and the engine oil have cooled.
A vehicle that is lifted but not securely supported on safety stands is dangerous.
It can slip or fall, causing death or serious injury. Never work ...
Rear ABS Wheel Speed Sensor Inspection [2 Wd]
Installation Visual Inspection
1. Inspect the following items:
If there is any malfunction, replace the applicable part.
a. Excessive play of the ABS wheel-speed sensor
b. Deformation of the ABS wheel-speed sensor
Clearance Inspection
1. Remove the ABS wheel-speed sensor.
2. M ...
Automatic Transaxle Removal/Installation [Fw6 Ax EL]
CAUTION:
Performing the following procedures without first removing the front ABS
wheel-speed sensor may possibly cause an open circuit in the harness if it is
pulled by mistake. Before performing the following procedures, disconnect the
front ABS wheel-speed sensor (axle side) and ...