Mazda CX-5 Service & Repair Manual: High Pressure Fuel Pump Control
Outline
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Changes the fuel pressure applied to the fuel injector according to engine operation conditions to improve engine output and startability.
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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
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During a cold engine start, the fuel pressure is raised to promote fuel atomization.
Basic Control
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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.
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When idling after engine warm up: Approx. 3 MPa {31 kgf/cm2, 435 psi}
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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
Purpose, Function
Store fuel safely and supply fuel to the engine.
Construction
U.S.A. and CANADA
The fuel tank is installed below the rear seat.
2WD
AWD
T ...
High Pressure Fuel Pump Inspection
NOTE:
The following vacuum values are indicated by relative pressure from the fuel
pressure sensor.
1. Verify that the fuel pressure sensor is normal..
2. Connect the M-MDS to the D ...
Other materials:
Column Cover Removal/Installation
1. Pull down the steering wheel.
2. Press the shaded area shown in the figure using your thumb, and lift the upper
column cover in the direction of arrow (1).
3. Pull the upper column cover in the direction of the arrow (2) and remove it
while detaching pins A, tabs B and guides C.
4. ...
Shift Lock System [Fw6 A EL, Fw6 Ax EL]
Purpose, Function
The shift-lock system operates when the ignition is switched to ON and the
brake pedal is not depressed, and inhibits the selector lever from being shifted
from the P position to other positions.
If the shift-lock cannot be released by the normal operation, it ...
Auto Light System
Outline
The auto light system automatically turns the TNS and headlights on/off according
to the illumination level above and in front of the vehicle.
The auto light system is controlled by the front body control module (FBCM).
The front body control module (FBCM) performs ...
