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EVAP System Pressure Test

  1. Ensure fuel filler cap is properly installed. Using Land Rover TestBook (use diagnostic disc DRG0002), close EVAP canister vent solenoid. Connect EVAPS Diagnostic Station System (LRA-19-004) to vehicle according to manufacturer instructions. Install Service Port Adapter (LRA-19-004-1) to line from fuel vapor separator, at EVAP canister. Connect EVAP diagnostic station Red hose to service port adapter. See Figure.
  2. Open valve on nitrogen cylinder. Turn control panel valve to PRESSURE position and pressurize EVAP system to 14.5 in. H2O. Turn control panel valve to OFF/HOLD position and monitor pressure gauge for 2 minutes. If pressure decrease is less than 6 in. H2O within 2 minutes, system is okay at this time. Go to step  4. If pressure decrease is more than 6 in. H2O within 2 minutes, go to next step.
  3. Turn control panel valve to PRESSURE position and pressurize EVAP system to 30.0 in. H2O. Using an ultrasonic leak detector, check all system hoses, connections and joints for leaks. Repair as necessary and repeat EVAP system pressure test. When pressure test is completed, go to next step.
  4. Insert Blue pressure release hose into pressure exhaust evacuation pipe. Turn control panel valve to PRESSURE RELEASE position. Using TestBook, open EVAP canister vent solenoid. Monitor pressure gauge until EVAP system pressure is zero inches of H2O. Turn control panel valve to OFF/HOLD position and close nitrogen cylinder valve. When repairs are completed, perform EVAP SYSTEM PRESSURE TEST DRIVE CYCLE .
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