High Pressure Fuel Pump Inspection

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

The following vacuum values are indicated by relative pressure from the fuel pressure sensor.

Verify that the fuel pressure sensor is normal. (See FUEL PRESSURE SENSOR INSPECTION .)
Connect the M-MDS to the DLC-2.
Switch the ignition ON (engine off).
Select the "FUEL_PRES", "LOAD" and "RPM" PIDs on the M-MDS. (See ON-BOARD DIAGNOSTIC TEST .)
CAUTION:
- If the engine is run at a high speed, it could be damaged. When racing the engine, be careful not to increase the engine speed suddenly.
After the "LOAD" PID is 60% or more while the engine is raced with the accelerator pedal fully depressed, verify that the "FUEL_PRES" PID is approx. 15.0 MPa {153 kgf/cm² , 2176 psi}.
- If not as specified, replace the high pressure fuel pump. (See HIGH PRESSURE FUEL PUMP REMOVAL/INSTALLATION .)