Ford Escape Manuals
Ford Escape 2020-2024 Service Manual / Powertrain / Engine / Evaporative Emissions / General Procedures - Evaporative Emission System Leak Test

Ford Escape: Evaporative Emissions / General Procedures - Evaporative Emission System Leak Test

Check

NOTE: Steps 1 to 7 are diagnosing potential leaks in the evaporative emissions system between the canister and the evaporative emissions system purge valve.

  1. With the vehicle in NEUTRAL, position it on a hoist.
    Refer to: Jacking and Lifting (100-02 Jacking and Lifting - 2.5L Duratec – Hybrid (121kW/164PS) (BG)) .
  1. NOTICE: Do not apply smoke to the EVAP leak detection control module. Internal module damage may result.

    NOTE: Typical evaporative emissions canister shown.

    Disconnect the evaporative emissions system purge line and connect the VACUTEC Smoke Machine Fuel Evaporative Emission Tester to the evaporative purge line quick connect fitting where shown. Refer to the manufacturer's instructions.
    Refer to: Quick Release Coupling (310-00 Fuel System - General Information - 2.5L Duratec – Hybrid (121kW/164PS) (BG)) .
  1. Using the VACUTEC Smoke Machine Fuel Evaporative Emission Tester, pressurize the EVAP system.
  1. Monitor the indicator flag on the VACUTEC Smoke Machine Fuel Evaporative Emission Tester. If the measurement is below the indicator flag, the system has passed the leak test and the test procedure is complete. If the measurement is above the indicator flag, the system has failed the leak test. If the leak test has failed, proceed to next step.
  1. Introduce smoke from the VACUTEC Smoke Machine Fuel Evaporative Emission Tester into the EVAP system. Refer to the manufacturer's instructions.
  1. Use the halogen spotlight provided with the VACUTEC Smoke Machine Fuel Evaporative Emission Tester to look for smoke coming from the EVAP system. This would indicate a leak point.
  1. Repair any leaks as necessary and reinstall components.

NOTE: Steps 8 to 13 are diagnosing potential leaks in the evaporative emissions system between the canister and the Tank Pressure Control valve (TPC) and the Refueling Valve (RV) valve.

  1. NOTICE: Do not apply smoke to the EVAP leak detection control module. Internal module damage may result.

    NOTE: Typical evaporative emissions canister shown.

    NOTE: This test is completed with the Tank Pressure Control Valve (TPC) and the Refueling Valve (RV) in the normally closed position and tests these two components for leaks.

    Disconnect the evaporative emissions system load line and connect the VACUTEC Smoke Machine Fuel Evaporative Emission Tester to the emissions system load line quick connect fitting where shown. Refer to the manufacturer's instructions.
    Refer to: Quick Release Coupling (310-00 Fuel System - General Information - 2.5L Duratec – Hybrid (121kW/164PS) (BG)) .
  1. Using the VACUTEC Smoke Machine Fuel Evaporative Emission Tester, pressurize the EVAP system.
  1. Monitor the indicator flag on the VACUTEC Smoke Machine Fuel Evaporative Emission Tester. If the measurement is below the indicator flag, the system has passed the leak test and the test procedure is complete. If the measurement is above the indicator flag, the system has failed the leak test. If the leak test has failed, proceed to next step.
  1. Introduce smoke from the VACUTEC Smoke Machine Fuel Evaporative Emission Tester into the EVAP system. Refer to the manufacturer's instructions.
  1. Use the halogen spotlight provided with the VACUTEC Smoke Machine Fuel Evaporative Emission Tester to look for smoke coming from the EVAP system. This would indicate a leak point.
  1. Repair any leaks as necessary and reinstall components.

NOTE: Steps 14 to 20 are diagnosing potential leaks in the evaporative emissions system between the canister and the fuel tank and associated components.

  1. NOTICE: Do not apply smoke to the EVAP leak detection control module. Internal module damage may result.

    NOTE: This test is completed with the evaporative system switching valve (EVAP_SW_VLV) in the open position and tests the fuel tank and associated vapor and fuel lines for leaks.

    With the evaporative emissions system load line previously disconnected from step 8, connect the VACUTEC Smoke Machine Fuel Evaporative Emission Tester to the emissions system load line quick connect fitting where shown. Refer to the manufacturer's instructions.
    Refer to: Quick Release Coupling (310-00 Fuel System - General Information - 2.5L Duratec – Hybrid (121kW/164PS) (BG)) .
  1. Using FDRS , command the evaporative system switching valve (EVAP_SW_VLV) into the open position.
  1. Using the VACUTEC Smoke Machine Fuel Evaporative Emission Tester, pressurize the EVAP system.
  1. Monitor the indicator flag on the VACUTEC Smoke Machine Fuel Evaporative Emission Tester. If the measurement is below the indicator flag, the system has passed the leak test and the test procedure is complete. If the measurement is above the indicator flag, the system has failed the leak test. If the leak test has failed, proceed to next step.
  1. Introduce smoke from the VACUTEC Smoke Machine Fuel Evaporative Emission Tester into the EVAP system. Refer to the manufacturer's instructions.
  1. Use the halogen spotlight provided with the VACUTEC Smoke Machine Fuel Evaporative Emission Tester to look for smoke coming from the EVAP system. This would indicate a leak point.
  1. Repair any leaks as necessary and reinstall components.

NOTE: Steps 21 to 28 are diagnosing potential leaks in the evaporative emissions canister body.

  1. Item Port
    1 Load Port
    2 Purge Port
    3 Fresh Air Port
    4 Dust Box
    5 ELCM
  1. Remove the evaporative emission canister.
    Refer to: Evaporative Emission Canister - Plug-In Hybrid Electric Vehicle (PHEV) (303-13C Evaporative Emissions, Removal and Installation).
  1. Use suitable plugs or caps to seal the load and purge ports on the evaporative emission canister.
  1. Purge the VACUTEC Smoke Machine Fuel Evaporative Emission Tester to atmosphere to clear it of smoke if it has been operated in smoke mode during previous tests.
  1. NOTICE: Do not apply smoke to the EVAP leak detection control module. Internal module damage may result.

    Connect the VACUTEC Smoke Machine Fuel Evaporative Emission Tester to the fresh air port.
  1. Spray the evaporative emission canister with soapy water.
  1. Apply pressure (not smoke) and check the evaporative emission canister for leaks. Leaks can be identified by the presence of bubbles in the soapy water.
  1. Repair any leaks or replace the components as necessary.
  1. NOTE: In addition to the VACUTEC leak check, an IDS or FDRS HEV routine is available to run the on-board leak test. This leak test should indicate whether a leak is present or not but does not necessarily show where the leak is located. The FDRS takes approximately 12 to 17 minutes to run depending on fuel level.

    The test is located on FDRS via Self Test > PCM > Perform KOEO Evap Leak Test. Repeat the leak test until the system passes.

    Diagnosis and Testing - Evaporative Emissions

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    Removal and Installation - Evaporative Emission Canister - Plug-In Hybrid Electric Vehicle (PHEV)

    Removal   WARNING: Do not smoke, carry lighted tobacco or have an open flame of any type when working on or near any fuel-related component...

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