Mazda CX-9 Grand Touring. Manual - part 419

 

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Mazda CX-9 Grand Touring. Manual - part 419

 

 

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 10:00:01 AM

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© 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 10:00:01 AM

Page 33 

© 2005 Mitchell Repair Information Company, LLC. 

Courtesy of MAZDA MOTORS CORP.

2. Pull the clip parallel to the injector groove, and remove it from the injector.  

3. Discard the clip. 

Fig. 45: Pulling Clip To Injector Groove 
Courtesy of MAZDA MOTORS CORP. 

FUEL INJECTOR INSTALLATION NOTE 

1. Install the new O-ring.  

2. Lightly lubricate the injector groove and O-ring.  

3. Pre-attach a new clip in the injector groove. 

4. Hold the injector firmly, push the clip into the injector until the clip stops sliding.  

5. Verify that the injector connector position is correct, and press the injector and clip into the injector cup. 

Continue pressing until the clip contacts the lower surface of the injector cup.  

6. Verify that the injector and clip are correctly attached with the clip locked onto the injector cup notch. 

Fig. 46: Pushing Clip Into Injector 
Courtesy of MAZDA MOTORS CORP. 

FUEL INJECTOR INSPECTION [MZI-3.7] 

NOTE:

When the clip is attached correctly, the central area of the injector 
and the clip finger positions are aligned.  

 

2008 Mazda CX-9 Grand Touring 

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

  

Microsoft 

 

Sunday, November 15, 2009 10:00:01 AM

Page 34 

© 2005 Mitchell Repair Information Company, LLC. 

OPERATION TEST 

1. Carry out the "Fuel Injector Operation Inspection". (See ENGINE CONTROL SYSTEM 

OPERATION INSPECTION [MZI-3.7] .) 

If not as specified, perform the further inspection for the fuel injectors.  

RESISTANCE INSPECTION 

1. Turn the ignition switch to LOCK position.  

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. Disconnect the fuel injector connectors.  

6. Measure the resistance of the fuel injector. 

If not as specified, replace the fuel injector. (See FUEL INJECTOR 
REMOVAL/INSTALLATION [MZI-3.7]
.)  

If as specified but "Operation Test" is failed, carry out the "Circuit Open/Short Inspection". Inspect 
for open or short circuit.  

Fuel injector resistance  

11-18 ohms  

Fig. 47: Identifying Fuel Injector Connectors 
Courtesy of MAZDA MOTORS CORP. 

CIRCUIT OPEN/SHORT INSPECTION 

1. Disconnect the PCM connector.  

2. Inspect the following wiring harness for open or short (continuity check). 

NOTE:

Perform the following inspection only when directed. 

 

2008 Mazda CX-9 Grand Touring 

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

  

Microsoft 

 

Sunday, November 15, 2009 10:00:01 AM

Page 35 

© 2005 Mitchell Repair Information Company, LLC. 

 

 

 

 

 

 

 

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