Mazda CX-9 Grand Touring 2009 Manual page 1645

Fig. 4: Fuel System Diagram
Courtesy of MAZDA MOTORS CORP.
BEFORE SERVICE PRECAUTION [MZI-3.7]
WARNING:
FUEL LINE SAFETY PROCEDURE
NOTE:
Fuel in the fuel system is under high pressure also when the engine is not
running.
1. Remove the fuel-filler cap and release the pressure in the fuel tank.
2. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)
3. Remove the fuel pump relay.
4. Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)
2008 Mazda CX-9 Grand Touring
2008 ENGINE Fuel System (MZI-3.7) - Mazda CX-9
Fuel vapor is hazardous. It can easily ignite, causing serious injury
and damage. Always keep sparks and flames away from fuel.
Fuel line spills and leakage are dangerous. Fuel can ignite and cause
serious injuries or death and damage. Fuel can also irritate skin and
eyes. To prevent this, always complete the following "Fuel Line
Safety Procedure".
A person charged with static electricity could cause a fire or
explosion, resulting in death or serious injury. Before performing
work on the fuel system, discharge static electricity by touching the
vehicle body.