Mazda CX-5 Service & Repair Manual: High Pressure Fuel Pump

Mazda CX-5 Service & Repair Manual / Engine / Fuel / High Pressure Fuel Pump

Purpose, Function

Applies pressure to fuel sent from the fuel pump equipped on the fuel tank, and then pumps it to the fuel delivery pipe.
Fuel is sectioned and pumped by the up and down movement of the piston caused by the rotation of the cam installed to the rear end of the exhaust camshaft.

Construction

The high pressure fuel pump is installed to the exhaust camshaft with the vacuum pump.
The high pressure fuel pump consists of a spill valve control solenoid valve, spill valve, piston, and spring.

Operation

Based on the control signal from the PCM, the spill valve solenoid valve opens and closes in the high pressure fuel pump.
For the high pressure fuel pump control details, refer to CONTROL SYSTEM..

Fail-safe


DTC	Fail-safe
P0089:00	Limits the intake air amount. Stops the high pressure fuel pump control. The upper limit of the engine speed is 2,500 rpm.
P0091:00	Limits the intake air amount. Stops the high pressure fuel pump control.
P0092:00	Limits the intake air amount. Stops the high pressure fuel pump control.

High Pressure Fuel Pump 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 ...

Low Fuel Warning Light

Purpose The low fuel warning light warns the driver that the remaining fuel level is low. Function The instrument cluster calculates the fuel quantity based on the following ...

Other materials:

When driving
Starting to drive, stopping, and parking Starting from a stop Press and hold the brake pedal. Start the engine. Select "D" or "R". Release the parking brake. Release the brake pedal. The vehicle may roll. Press the accelerator pedal to accelerate. Securing the vehicle against rolling Secure ...

Manifold Absolute Pressure (Map) Sensor
Purpose/Function Detects the intake air pressure introduced into the cylinder as basic information for mainly determining the fuel injection amount. Detects the intake air pressure introduced into the cylinder and inputs it to the PCM as an intake air pressure signal. Cons ...

Wheel Hub, Steering Knuckle Inspection
Wheel Bearing Excessive Play Inspection 1. Install the magnetic base and dial gauge as shown in the figure and measure the wheel bearing axial excessive play. If it exceeds the maximum specification, replace the wheel hub bearing. Front wheel bearing maximum play 0 ...