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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 64 (Engine Controls [System & Component Testing]) >> Emission Systems & Sub-Systems >> Evaporative System Leak Inspection Using Leak Tester >> Evaporative Emission System Tester Self Test - Except Protege & Protege5

Evaporative Emission System Tester Self Test - Except Protege & Protege5

WARNING: This page is about a different car, the 2003 Mazda Protege5, 2003 Mazda Protege, 2003 Mazda MX-5 Miata, 2003 Mazda MPV, and 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify gas cylinder valve is closed and control valve (located on tester) is in TEST position. All tester displays should be off at this time.
  2. Connect long hose (part of emission system tester) to tester. See Fig 1.
    Fig 1: Identifying Leak Detector Hose Connection, Control Valve & Regulator Knob
    G00193613Courtesy of MAZDA MOTORS CORP.
  3. Connect manifold assembly (part of emission system tester) to long hose. See Fig 2.
    Fig 2: Identifying Leak Detector Manifold & Hose Connection
    G00193614Courtesy of MAZDA MOTORS CORP.
  4. Open gas cylinder valve and verify gas cylinder regulator left gauge reads 10 to 12 psi (preset at factory). If not, see tester operators manual to contact tester manufacturer.
  5. Press ON/OFF switch to turn on emission system tester and make sure left display reads 0.0. Turn control valve on tester to FILL position.
  6. Verify left display reading is within 13.9 to 14.0 inches of water. If not, adjust pressure using regulator knob located on right side of tester.
  7. Turn control valve to TEST position and press START switch.
  8. After 2-minute countdown (left display) is completed, right display shows total pressure loss for that period. A 0.5 inch of water loss is acceptable on self-test. If loss is more than 0.5 inch of water, perform one or more self-test. If failed test repeats, check for leak using the ultrasonic leak detector (part of emission system tester).
  9. Press RESET switch to set left display reading to 0.0.
  10. Connect fuel cap test adapter (part of emission system tester) to manifold assembly and fuel-filler cap from vehicle. See Fig 3. If fuel-filler cap is not a Mazda part, replace it.
  11. Connect threaded test adapter (part of emission system tester) to manifold assembly and fuel-filler neck.
    Fig 3: Testing Fuel Filler Cap With EVAP Emission System Leak Tester
    G00193615Courtesy of MAZDA MOTORS CORP.
  12. Connect scan tool to DLC-2.
  13. Turn ignition on, engine off.
  14. Request PCM for on-board device control (Mode 08) using scan tool to close change over valve (COV) in EVAP system leak detection pump
    NOTE: COV is closed for 10 minutes unless any of following action is done:
    • Engine is started.
    • Ignition is turned off.
  15. Turn control valve to FILL position.
  16. Wait (maximum 40 seconds) until left display reads 13.5 to 14.0 inches of water.
    • If reading is slightly less than specified, adjust reading using regulator knob.
    • If reading is far less than specified, EVAP system has large leak. Check for leak using ultrasonic leak detector. Repair as necessary.
  17. Turn control valve to TEST position and press START switch.
  18. After 2-minute countdown (left display) is completed, check test result (FAILED/PASSED light on tester).
    • If Green light turns on, EVAP system is OK.
    • If Red light turns on, EVAP system has leakage.
  19. Check for leak using ultrasonic leak detector and repair.
  20. Close gas cylinder valve.
  21. Turn control valve to FILL position.
  22. Press ON/OFF switch to turn off tester.
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