Mazda CX-9 Grand Touring. Manual — part 409



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]

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.

WARNING:



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".

2008 Mazda CX-9 Grand Touring

2008 ENGINE Fuel System (MZI-3.7) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:04:45 AM

Page 30

© 2005 Mitchell Repair Information Company, LLC.

4. Cover the disconnected quick release connector and fuel pipe with vinyl sheeting or a similar material to

prevent it from scratches or dirt.

Fig. 40: View Of Quick Release Connector
Courtesy of MAZDA MOTORS CORP.

INSTALLATION

1. Inspect the fuel hose and fuel pipe sealing surface for damage and deformation.



If there is any malfunction, replace it with a new one.

2. Install the quick release connector.



Insert the fuel pipe straight to the end of the quick release connector.



Push down the retainer using a finger.



If the retainer cannot be pushed down, push the fuel pipe further to the quick release
connector.

3. Lightly pull and push the quick release connector a few times by hand, and then verify that it is connected

securely.

4. Inspect all related parts by performing "AFTER SERVICE PRECAUTION". (See AFTER SERVICE

PRECAUTION [MZI-3.7].)

Fig. 41: View Of Quick Release Connector

NOTE:



If the quick release connector O-ring is damaged or has slipped, replace
the fuel hose.

2008 Mazda CX-9 Grand Touring

2008 ENGINE Fuel System (MZI-3.7) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:04:45 AM

Page 31

© 2005 Mitchell Repair Information Company, LLC.

Courtesy of MAZDA MOTORS CORP.

FUEL INJECTOR REMOVAL/INSTALLATION [MZI-3.7]

1. Complete the "BEFORE SERVICE PRECAUTION". (See BEFORE SERVICE PRECAUTION [MZI-

3.7].)

2. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)

3. Remove the engine cover. (See ENGINE COVER REMOVAL/INSTALLATION [MZI-3.7] .)

4. Remove the dynamic chamber (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZI-

3.7] .)

5. Remove in the order indicated in the table.

Fig. 42: Identifying Quick Release Connector, Wiring Harness Retainer, Fuel Injector Connectors,
Clip & Torque Specifications
Courtesy of MAZDA MOTORS CORP.

6. Install in the reverse order of removal.

WARNING:



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".

2008 Mazda CX-9 Grand Touring

2008 ENGINE Fuel System (MZI-3.7) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:04:45 AM

Page 32

© 2005 Mitchell Repair Information Company, LLC.

7. Complete the "AFTER SERVICE PRECAUTION". (See AFTER SERVICE PRECAUTION [MZI-

3.7].)

FUEL INJECTOR REMOVAL NOTE

1. Insert a screwdriver between the injector cup and the clip fingers.

Fig. 43: Identifying Injector Cup & Clip Fingers
Courtesy of MAZDA MOTORS CORP.

2. Rotate the screwdriver to spread the clip fingers and remove them from the injector cup.

3. Pull the injector and clip out of the rail.

4. Remove the clip from the injector according to the following:

1. Grasp the clip with a pair of pliers.

Fig. 44: Identifying Clip Fingers & Notch

CAUTION:



Use of a deformed injector retaining clip will cause the injector to not
engage correctly. Always use a new clip when reattaching the
injector, otherwise it may cause the injector to rotate.

NOTE:



When rotating the screwdriver to spread the clip fingers, deform
them sufficiently to make sure they release from the notched edge of
the injector cup.

2008 Mazda CX-9 Grand Touring

2008 ENGINE Fuel System (MZI-3.7) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:04:45 AM

Page 33

© 2005 Mitchell Repair Information Company, LLC.