MX-5 Miata LS L4-1.8L DOHC (2001)
Canister Vent Valve: Testing and Inspection
Evaporative Emission (EVAP) System Leak Inspection
Using Leak Tester
1. Perform the following SST (Evaporative Emission System Tester MZ254AT3641) self-test:
NOTE: If the tester does not work correctly during self-test, refer to the tester operators manual for more detailed self-test procedures.
1. Verify the gas cylinder valve is closed and the control valve located on the tester is in the TEST position. All tester displays should be off at
this time.
2. Connect the long hose (part of SST) to the tester.
3. Connect the manifold component (part of SST) to the long hose as shown.
4. Open the gas cylinder valve and verify the gas cylinder regulator left gauge reads 10 to 12 psi (preset at factory).
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If not, refer to the tester operators manual to contact tester manufacturer.
5. Press the ON/OFF switch to turn on the SST and make sure the left display reads 0.0.
6. Turn the control valve on the tester to the FILL position.
7. Verify the left display reading is within 13.9 to 14.0 in of water
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If not, adjust the pressure using the regulator knob located on the right side of the tester.
8. Turn the control valve to TEST position and press the START switch.
9. After the 2-minute countdown (left display) is completed, the right display shows the total pressure loss for that period. A 0.5 in of water loss
is acceptable on the self-test.
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If the loss is more than 0.5 in of water, perform one or more self-test. If the failed test repeats, check for leak using the ultrasonic leak
detector (part of SST).
2. Press the RESET switch to set the left display reading to 0.0.
3. Connect the fuel cap test adapter (part of SST) to the manifold component and fuel-filler cap from the vehicle.
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If the fuel-filler cap is not a genuine part, replace it.
4. Connect the threaded test adapter (part of SST) to the manifold component and fuel-filler neck.
5. Connect the NGS tester to DLC-2.
6. Turn the ignition key to ON (engine OFF).
7. Select GENERIC OBD-II FUNCTIONS.
8. Press CONT (#8).
9. Select ON BOARD DEVICE CONTROL.
10. Press TRIGGER to close the canister drain cut valve (CDCV).
NOTE:
