Without Using M-MDS

Remove the fuel pump relay.
CAUTION:
- Short the specified terminals because shorting the wrong terminal of the relay and fuse block may cause malfunctions.
Fig 1: Identifying Fuel Pump Relay
Courtesy of MAZDA MOTORS CORP.
Using a jumper wire, short fuel pump relay terminals C and D in the relay and fuse block.
Connect the negative battery cable and operate the fuel pump. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)

8. Operate the fuel pump for 10 s .
9. Measure the fuel line pressure.
- If not within the specification, inspect the following:
  If it less than the specification:
  - Fuel pump unit
  - Fuel line for restriction or leakage
  If it exceeds the specification:
  - Fuel line restriction
    
    Fig 2: Identifying Fuel Pump Relay
    Courtesy of MAZDA MOTORS CORP.
Fuel pressure

405-485 kPa {4.13-4.94 kgf/cm ² , 58.8-70.3 psi}
10. Stop the fuel pump using the following procedure.
Using M-MDS
1. Using the simulation function "FP", stop the fuel pump. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
Without using M-MDS
1. Disconnect the negative battery cable to stop the fuel pump. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
11. Measure the fuel hold pressure after 5 min .
- If not within the specification, inspect the following:
  - Fuel line leakage
Fuel hold pressure

230 kPa {2.35 kgf/cm ² , 33.4 psi} or more
12. Complete the "BEFORE SERVICE PRECAUTION". (See BEFORE SERVICE PRECAUTION .)
13. Disconnect the SST .
14. Connect the quick release connector. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION .)
15. Complete the "AFTER SERVICE PRECAUTION". (See AFTER SERVICE PRECAUTION .)