Mazda CX-9 Grand Touring. Manual — part 353

Fig. 20: EVAP System Leak Inspection Using Leak Tester
Courtesy of MAZDA MOTORS CORP.

2. Connect the SST to the vehicle.

1. Verify that the control valve on the panel is in the HOLD position then open the nitrogen bottle

valve.

2. Remove the fuel-filler cap from the vehicle.



If the fuel-filler cap is not a MAZDA part or equivalent, replace it.

3. Connect the receiver assembly (SST: 134-01059) to the vehicle cap test hose assembly (part of the

SST ) and the fuel-filler cap from the vehicle.

4. Connect the cap adaptor (SST: 134-01058) to the vehicle cap test hose assembly (part of the SST )

and to the fuel-filler neck.

5. Connect the vehicle interface hose (part of the SST ) to the center fitting of the vehicle cap test

hose assembly (part of the SST ).

3. Connect the M-MDS to the DLC-2.

4. Turn the ignition switch to the ON position (Engine off).

5. Request the PCM on-board device control (Mode 08) using the M-MDS to close the canister vent value.

NOTE:



INSPECT FUEL FILLER CAP AND FILLER NECK



Visually inspect for damage, insufficient sealing, rust,
cracks or warps for filler cap and filler neck.



Repair or replace if necessary.

2008 Mazda CX-9 Grand Touring

2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:10:06 AM

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Fig. 21: Inspecting Fuel Filler Cap & Filler Neck
Courtesy of MAZDA MOTORS CORP.

6. Make sure the control valve on the 134-01049 is in the HOLD position and that the valve on the cylinder

of nitrogen gas is open.

7. Turn the control valve to the open position and let the system fill. You should note a drop in the gauge

pressure along with the flow meter being pegged at maximum flow for several minutes depending on how
full or empty the fuel tank is, and how long it takes to completely fill and pressurize the evaporative
emissions system hoses.

8. If the gauge and the flow meter do not settle to a measurable level after 2-3 min, then refer to the Mazda

Workshop Manual to verify that the canister vent valve is properly closed. If canister vent valve is
properly closed. The EVAP system has large leakage. Check for leakage and repair as necessary.

9. Verify the pressure gauge and flow meter reading to determine if there is an evaporative emissions leak:

NO EVAPORATIVE LEAK:



The flow meter registers "zero flow" and the pressure gauge returns to the pre-set pressure of 356
mm {14 in} of water (H2O).

EVAPORATIVE LEAK:



The pressure does not return to the preset level of 356 mm {14 in} of water (H2O) when measuring
the flow. See "SETTING LEAK STANDARD FOR TESTING" (.020 to .040 inch H2O) of the
Evaporative Emissions Tester operators manual (134-01067).

NOTE:



The canister vent value is closed for 10 min unless the following any
actions are done:



The engine is started.



The ignition switch is turned off position.

NOTE:



Turn the control valve to the HOLD position then disconnect the SST.

2008 Mazda CX-9 Grand Touring

2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9

Microsoft

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2008 ENGINE

Mechanical (MZI-3.7) - Mazda CX-9

ENGINE LOCATION INDEX [MZI-3.7]

2008 Mazda CX-9 Grand Touring

2008 ENGINE Mechanical (MZI-3.7) - Mazda CX-9

2008 Mazda CX-9 Grand Touring

2008 ENGINE Mechanical (MZI-3.7) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:01:56 AM

Page 1

© 2005 Mitchell Repair Information Company, LLC.

Microsoft

Sunday, November 15, 2009 10:02:01 AM

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Fig. 1: Exploded View Of Engine Components
Courtesy of MAZDA MOTORS CORP.

ENGINE TUNE-UP [MZI-3.7]

2008 Mazda CX-9 Grand Touring

2008 ENGINE Mechanical (MZI-3.7) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:01:56 AM

Page 2

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