Mazda CX-9 Grand Touring. Manual — part 200

Fig. 7: Identifying Fuel-Filler Cap Receiver Assembly
Courtesy of MAZDA MOTORS CORP.

8. Close the gas cylinder valve.

9. Turn the control valve to the FILL position.

10. Press the ON/OFF switch to turn off the tester.

CHARCOAL CANISTER, CANISTER VENT (CV) SOLENOID VALVE, AIR
FILTER COMPONENT 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.

3. Install in the reverse order of removal.

NOTE:



Remove the charcoal canister, CV solenoid valve, and air filter as a
single unit.

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.

Fig. 8: Identifying Quick Release Connector, Evaporative Hose, Charcoal Canister & Torque
Specifications
Courtesy of MAZDA MOTORS CORP.

CHARCOAL CANISTER, CANISTER VENT (CV) SOLENOID VALVE, AIR
FILTER COMPONENT INSPECTION [MZI-3.7]

AIRFLOW INSPECTION

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

2. Remove the charcoal canister, CV solenoid valve, air filter component. (See CHARCOAL CANISTER,

CANISTER VENT (CV) SOLENOID VALVE, AIR FILTER COMPONENT
REMOVAL/INSTALLATION [MZI-3.7].)

3. Plug the purge solenoid valve side of the charcoal canister.

4. Pressurizing from the fuel tank side of the charcoal canister, verify that there is no leak from the charcoal

canister and that the CV solenoid valve is closed.



If malfunction, replace the charcoal canister, CV solenoid valve, air filter component. (See
CHARCOAL CANISTER, CANISTER VENT (CV) SOLENOID VALVE, AIR FILTER
COMPONENT REMOVAL/INSTALLATION [MZI-3.7].)

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.

Fig. 9: Identifying Purge Solenoid Valve And Fuel Tank
Courtesy of MAZDA MOTORS CORP.

5. Connect the battery positive voltage to CV solenoid valve terminal A.

6. Pressurizing from the fuel tank side of the charcoal canister, verify that the CV solenoid valve is open and

that there is airflow through the air filter.



If malfunction, replace the charcoal canister, CV solenoid valve, air filter component. (See
CHARCOAL CANISTER, CANISTER VENT (CV) SOLENOID VALVE, AIR FILTER
COMPONENT REMOVAL/INSTALLATION [MZI-3.7].)

Fig. 10: Identifying CV Solenoid Valve Wiring Harness-Side Connector
Courtesy of MAZDA MOTORS CORP.

7. Pressurizing from the air filter side, verify that the CV solenoid valve is open and that there is airflow

through the air filter.



If malfunction, replace the charcoal canister, CV solenoid valve, air filter component. (See
CHARCOAL CANISTER, CANISTER VENT (CV) SOLENOID VALVE, AIR FILTER
COMPONENT REMOVAL/INSTALLATION [MZI-3.7].)

CV SOLENOID VALVE CIRCUIT OPEN/SHORT INSPECTION

1. Disconnect the PCM connector.

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

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.

Fig. 11: Identifying CV Solenoid Valve Wiring Harness-Side Connector
Courtesy of MAZDA MOTORS CORP.

Fig. 12: 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.



CV solenoid valve terminal B and PCM terminal 1Z



CV solenoid valve terminal A and battery

Short circuit



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



CV solenoid valve terminal B and power supply



CV solenoid valve terminal B and body ground

PURGE SOLENOID VALVE REMOVAL/INSTALLATION [MZI-3.7]

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 10

© 2005 Mitchell Repair Information Company, LLC.