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:
Rear Window Glass Installation
WARNING:
Using a utility knife with bare hands can cause injury. Always wear gloves
when using a utility knife.
CAUTION:
Proper installation of the glass may be difficult if sealant is cracked or
the glass is pushed out by air pressure when a door is opened/closed with al ...
PID/Data Monitor Inspection [Two Step Deployment Control System]
1. Connect the M-MDS to the DLC-2.
2. After the vehicle is identified, select the following items from the initialization
screen of the M-MDS.
a. Select “DataLogger”.
b. Select “Modules”.
c. Select “RCM”.
3. Select the applicable PID from the PID table.
4. Verify the PID da ...
Steering Shaft Inspection
1. Inspect the steering column for excessive play and damage.
2. Verify that the clearance between the projection on the steering column shown
in the figure and the bracket is less than 2.0 mm {0.079 in}.
If the clearance between the projection and bracket is 2.0 mm {0.079 in}
or ...
