Mazda CX-5 Service & Repair Manual: Fuel Pump Unit
Purpose, Function
-
Supplies fuel in the fuel tank to the high pressure fuel pump.
-
Based on the control signal from the PCM, the fuel pump operates by the operation of the fuel pump relay and the fuel pump control module.
Construction
2WD
-
The fuel pump unit is installed to the fuel tank.
-
The fuel pump unit consists of a fuel pump, fuel filter (low-pressure) fuel filter (high-pressure), pressure regulator, and lower cover.
AWD
-
The fuel pump unit is installed to the fuel tank.
-
The fuel pump unit consists of a fuel pump, fuel filter (low-pressure) fuel filter (high-pressure), pressure regulator, lower cover, and jet pump.
Operation
2WD
-
Based on the control signal from the PCM, the fuel pump suctions fuel in the lower cover and pumps it to the high pressure fuel pump. After fuel is sufficiently filtered through the fuel filter (low-pressure) and fuel filter (high-pressure), fuel pressure is adjusted to approx. 430 kPa {4.38 kgf/cm2, 62.4 psi}
by the pressure regulator.
AWD
-
Based on the control signal from the PCM, the fuel pump suctions fuel in the lower cover and pumps it to the high pressure fuel pump. After fuel is sufficiently filtered through the fuel filter (low-pressure) and fuel filter (high-pressure), fuel pressure is adjusted to approx. 430 kPa {4.38 kgf/cm2, 62.4 psi}
by the pressure regulator.
-
Positions the venturi pipe (jet pump) in the return path from the pressure regulator and sends fuel from the fuel tank sub side to the main side using vacuum generated in that area.
-
For fuel pump control details, refer to CONTROL SYSTEM..
Fail-safe
-
Function not equipped.
Fuel Pump Unit 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 Shut Off Valve Inspection
U.S.A. And CANADA
NOTE:
The fuel shut-off valve cannot be removed and inspected as it is built into
the fuel tank.
1. Perform the fuel tank inspection..
If there is any malfu ...
Other materials:
Throttle Position (TP) Sensor
Purpose/Function
Detects the throttle valve opening/closing condition, which operates in accordance
with the accelerator pedal operation, as basic information for mainly determining
the fuel injection amount.
Detects the throttle valve opening/closing condition, which operates i ...
Keyless Antenna [Keyless Entry System]
Purpose
Outputs a request signal and specifies the remote transmitter location.
Function
The keyless antennas output request signals based on the signals from the
start stop unit.
Construction, Operation
Request signals are output by the keyless antenna installed ...
Mass Air Flow (MAF) Sensor
Purpose/Function
Detects the intake airflow amount introduced into the cylinder as basic information
for mainly determining the fuel injection amount.
Detects the intake airflow amount introduced into the cylinder and inputs
it to the PCM as an intake airflow amount signal.
...
