Mazda CX-9 Grand Touring. Manual - part 413

Fig. 9: Identifying SST Lever 
Courtesy of MAZDA MOTORS CORP. 

Using M-MDS  

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

2. Connect the M-MDS to the DLC-2.  

3. Using the simulation function "FP", start the fuel pump. 

Fig. 10: Connecting M-MDS To DLC-2 
Courtesy of MAZDA MOTORS CORP. 

Without using M-MDS  

1. Remove the fuel pump relay. 

2. Using a jumper wire, short fuel pump relay terminals C and D in the main fuse block.  

3. Connect the negative battery cable and operate the fuel pump. 

CAUTION:



Short the specified terminals because shorting the wrong 
terminal of the main fuse block may cause malfunctions.  

 

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 8 

© 2005 Mitchell Repair Information Company, LLC. 

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

2

 , 48.1-70.3 psi} 

 

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

  

Microsoft 

 

Sunday, November 15, 2009 10:00:01 AM

Page 9 

© 2005 Mitchell Repair Information Company, LLC. 

FUEL TANK REMOVAL/INSTALLATION [MZI-3.7]

2WD 

1. Level the vehicle.  

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

3.7].)  

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

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

5. Remove the fuel line schrader valve cap.  

6. Connect a long hose to the disconnected schrader valve cap and drain the fuel into a container used for 

collecting gasoline.  

7. Start the fuel pump using the following procedure. 

WARNING:



Repairing a fuel tank that has not been properly steam cleaned can 
be dangerous. Explosion or fire may cause death or serious injury. 
Always properly steam clean a fuel tank before repairing it.  



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, do not damage the sealing surface of the fuel 
pump unit when removing or installing.  



A person charged with static electricity could cause a fire or 
explosion, resulting in death or serious injury. Before draining fuel, 
make sure to discharge static electricity by touching the vehicle 
body.  

CAUTION:



Disconnecting/connecting the quick release connector without 
cleaning it may possibly cause damage to the fuel pipe and quick 
release connector. Always clean the quick release connector joint 
area before disconnecting/connecting using a cloth or soft brush, 
and make sure that it is free of foreign material.  

 

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 10 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 12: Identifying Schrader Valve Cap & Fuel Distributor 
Courtesy of MAZDA MOTORS CORP. 

Using M-MDS  

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

2. Connect the M-MDS to the DLC-2.  

3. Using the simulation function FP, start the fuel pump. 

Fig. 13: Connecting M-MDS To DLC-2 
Courtesy of MAZDA MOTORS CORP. 

Without using M-MDS  

1. Remove the fuel pump relay. 

2. Using a jumper wire, short fuel pump relay terminals C and D in the main fuse block.  

3. Connect the negative battery cable and operate the fuel pump. 

CAUTION:



Short the specified terminals because shorting the wrong 
terminal of the main fuse block may cause malfunctions.  

 

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 11 

© 2005 Mitchell Repair Information Company, LLC.