Mazda CX-9 Grand Touring. Manual - part 203

Fig. 26: Identifying PCM Wiring Harness Side Connector 
Courtesy of MAZDA MOTORS CORP. 

Open circuit  



If there is no continuity, there is an open circuit. Repair or replace the wiring harness. 



PCV valve heater fitting terminal A and main relay No.1 terminal D  



PCV valve heater fitting terminal B and PCM terminal 2AU  

Short circuit  



If there is continuity, there is a short circuit. Repair or replace the wiring harness. 



PCV valve heater fitting terminal A and power supply  



PCV valve heater fitting terminal A and body ground  



PCV valve heater fitting terminal B and power supply  



PCV valve heater fitting terminal B and body ground  

POSITIVE CRANKCASE VENTILATION (PCV) VALVE HEATER FITTING 
REMOVAL/INSTALLATION [MZI-3.7] 

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

2. Remove in the order indicated in the table. 

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE PERFORMANCE Emission System (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:04:04 AM

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Fig. 27: Identifying PCV Valve Hose, PCV Valve Heater Control Connector, PCV Valve, O-Ring & 
Torque Specifications 
Courtesy of MAZDA MOTORS CORP. 

3. Install in the reverse order of removal.  

ROLLOVER VALVE REMOVAL/INSTALLATION [MZI-3.7] 

ROLLOVER VALVE INSPECTION [MZI-3.7] 

1. Perform the fuel tank inspection. (See FUEL TANK INSPECTION [MZI-3.7] .)  

FUEL SHUT-OFF VALVE REMOVAL/INSTALLATION [MZI-3.7] 

NOTE:



The rollover valve cannot be removed as it is built into the fuel tank. 

NOTE:



The rollover valve cannot be disassembled and inspected as it is built into 
the fuel tank.  

NOTE:



The fuel shut-off valve cannot be removed as it is built into the fuel tank. 

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE PERFORMANCE Emission System (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:04:04 AM

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© 2005 Mitchell Repair Information Company, LLC. 

FUEL SHUT-OFF VALVE INSPECTION [MZI-3.7]

1. Perform the fuel tank inspection. (See FUEL TANK INSPECTION [MZI-3.7] .)  

QUICK RELEASE CONNECTOR (EMISSION SYSTEM) 
REMOVAL/INSTALLATION [MZI-3.7] 

QUICK RELEASE CONNECTOR TYPE 

TYPE A REMOVAL 

1. Release the retainer shown in the figure.  

2. Disconnect the quick release connector. 

NOTE:



The fuel shut-off valve cannot be removed and inspected as it is built into 
the fuel tank.  

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".  

CAUTION:



There are five types of quick release connectors. Verify the type and 
location, and install/remove properly. 

Fig. 28: Identifying Engine Compartment Side And Ventilation Hose 
Courtesy of MAZDA MOTORS CORP. 

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE PERFORMANCE Emission System (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:04:04 AM

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© 2005 Mitchell Repair Information Company, LLC. 

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

prevent it from scratches or dirt. 

Fig. 29: Identifying Quick Release Connector And Retainer 
Courtesy of MAZDA MOTORS CORP. 

TYPE B REMOVAL NOTE 

1. Push the retainer. 

2. Pull the connector side and disconnect the quick release connector.  

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

prevent it from scratches or dirt. 

Fig. 30: Identifying Quick Release Connector And Retainer 
Courtesy of MAZDA MOTORS CORP.

NOTE:



If the quick release connector is removed, replace the retainer with a new 
one.  

NOTE:



The quick release connector can be removed by pushing the center 
of the retainer tabs.  



The retainer is attached to the pipe even after the connector is 
disconnected.  

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE PERFORMANCE Emission System (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:04:04 AM

Page 22 

© 2005 Mitchell Repair Information Company, LLC.