Mazda CX-7 2007 Workshop Manual page 394

SYMPTOM TROUBLESHOOTING [L3 WITH TC]
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 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 change-over valve (COV) in the EVAP system leak detection pump.
Note
• The COV is closed for 10 min unless any of the following actions are performed:
— The engine is started.
— The ignition switch is turned off.
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 cut or vent valve is properly closed.
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
• Turn the control valve to the HOLD position then disconnect the SST.
End Of Sie
01-03–94
CAP ADAPTER
RECEIVER
ASSEMBLY
VEHICLE CAP
TEST HOSE
ASSEMBLY
VEHICLE
INTERFACE
HOSE
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