Mazda CX-5 Service & Repair Manual: Returnless Fuel System
Purpose, Outline
-
Fuel evaporation in the fuel tank is reduced by adjusting the fuel amount (fuel pressure) ejected from the fuel pump and preventing fuel warmed in the engine compartment from returning.
System Diagram
2WD
AWD
Structure
-
The returnless fuel system consists of the following parts:
|
Part name |
Reference |
|
Fuel filter (low-pressure) |
(See FUEL PUMP UNIT [SKYACTIV-G 2.0].) |
|
Fuel filter (high-pressure) |
|
|
Pressure regulator |
|
|
Fuel pump |
Operation
-
Fuel in the fuel tank is pumped out through the fuel filter (low-pressure) by the fuel pump, filtered by the fuel filter (high-pressure), and then regulated to a specified pressure by the pressure regulator. The regulated fuel is sent to the high pressure fuel pump, and unnecessary regulated fuel is returned from the pressure regulator to the fuel tank.
2WD
AWD
Quick Release Connector Removal/Installation
WARNING:
Fuel is very flammable liquid. If fuel spills or leaks from the pressurized
fuel system, it will cause serious injury or death and facility breakage. Fuel
can also irritate skin ...
Fuel Pressure Sensor Inspection
Voltage Inspection
NOTE:
The fuel pressure sensor cannot be removed as a single unit. When replacing
the fuel pressure sensor, replace it together with the fuel distributor as a
single ...
Other materials:
Ignition Coil [Skyactiv G 2.0]
Purpose, Function
The ignition coil generates high voltage by electromagnetic induction to
discharge the spark plug.
Construction
The ignition coil is installed to the upper part of the spark plug (direct
ignition coil).
With the adoption of the direct ignitio ...
Condenser Inspection
1. Inspect the condenser for cracks, damage, and oil leakage.
If there is any malfunction, replace the condenser.
2. Visually inspect for bent fins for clogging of foreign material.
If any fins are clogged, remove the foreign material.
3. Visually inspect for bent fins.
...
Power Brake Unit Inspection
NOTE:
The following inspection methods are simple inspection methods to judge the
function of the power brake unit.
If there is any malfunction in the power brake unit, replace the power brake
unit as a single unit.
Without Using SST
Operation inspection
1. With the eng ...
