Mazda CX-9 Grand Touring 2009 Manual page 1671

Fuel pump unit terminal D and body ground
Fuel pump unit terminal C and fuel pump relay terminal D
Short circuit
If there is continuity, the circuit is short. Repair or replace the harness.
Fuel pump unit terminal D and power supply
Fuel pump unit terminal B and body ground
QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION [MZI-3.7]
WARNING:
QUICK RELEASE CONNECTOR POSITION
Fig. 39: Identifying Quick Release Connector
Courtesy of MAZDA MOTORS CORP.
REMOVAL
1. Follow "BEFORE SERVICE PRECAUTION" and remove dirt from the connecting surfaces before
performing any work operations. (See BEFORE SERVICE PRECAUTION [MZI-3.7].)
2. Move the retainer upward using a small flathead screwdriver or a similar tool.
3. Pull out the fuel hose straight from the fuel pipe and disconnect it.
2008 Mazda CX-9 Grand Touring
2008 ENGINE Fuel System (MZI-3.7) - Mazda CX-9
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 and eyes. To prevent
this, always complete the "Fuel Line Safety Procedure", while
referring to the "BEFORE SERVICE PRECAUTION".