Mazda CX-9 Grand Touring 2009 Manual page 1650

8. Measure the fuel line pressure, (during key on engine off (KOEO))
If not as specified, inspect the following:
Zero or low
FP circuit
FP
Fuel line (clogging)
Fuel leakage inside pressure regulator
High
Pressure regulator
Fig. 11: Identifying Main Fuse Block (Fuel Pump Relay)
Courtesy of MAZDA MOTORS CORP.
Fuel line pressure
331-485 kPa {3.38-4.94 kgf/cm
9. Stop the fuel pump using the following procedure.
Using M-MDS
1. Stop the fuel pump using the "FP" simulation function.
Using M-MDS
1. Turn the ignition switch off.
2. Disconnect the negative battery cable to stop the fuel pump.
10. Disconnect the fuel pressure gauge and connect the fuel pipe.
11. Complete the "AFTER SERVICE PRECAUTION". (See AFTER SERVICE PRECAUTION [MZI-
3.7].)
2008 Mazda CX-9 Grand Touring
2008 ENGINE Fuel System (MZI-3.7) - Mazda CX-9
2
, 48.1-70.3 psi}