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.
-
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))
.
-
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))
.
-
Using the VACUTEC Smoke Machine Fuel Evaporative Emission Tester, pressurize the EVAP system.
-
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.
-
Introduce smoke from the VACUTEC Smoke Machine Fuel Evaporative
Emission Tester into the EVAP system. Refer to the manufacturer's
instructions.
-
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.
-
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.
-
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))
.
-
Using the VACUTEC Smoke Machine Fuel Evaporative Emission Tester, pressurize the EVAP system.
-
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.
-
Introduce smoke from the VACUTEC Smoke Machine Fuel Evaporative
Emission Tester into the EVAP system. Refer to the manufacturer's
instructions.
-
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.
-
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.
-
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))
.
-
Using FDRS , command the evaporative system switching valve (EVAP_SW_VLV) into the open position.
-
Using the VACUTEC Smoke Machine Fuel Evaporative Emission Tester, pressurize the EVAP system.
-
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.
-
Introduce smoke from the VACUTEC Smoke Machine Fuel Evaporative
Emission Tester into the EVAP system. Refer to the manufacturer's
instructions.
-
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.
-
Repair any leaks as necessary and reinstall components.
NOTE:
Steps 21 to 28 are diagnosing potential leaks in the evaporative emissions canister body.
-
Item
|
Port
|
1
|
Load Port
|
2
|
Purge Port
|
3
|
Fresh Air Port
|
4
|
Dust Box
|
5
|
ELCM
|
-
Remove the evaporative emission canister.
Refer to: Evaporative Emission Canister - Plug-In Hybrid Electric
Vehicle (PHEV) (303-13C Evaporative Emissions, Removal and
Installation).
-
Use suitable plugs or caps to seal the load and purge ports on the evaporative emission canister.
-
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.
-
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.
-
Spray the evaporative emission canister with soapy water.
-
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.
-
Repair any leaks or replace the components as necessary.
-
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.
Diagnostic Trouble Code (DTC) Chart
Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods (100-00 General Information, Description and Operation)...
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...
Other information:
Special Tool(s) /
General Equipment
Fluid Suction Gun
Materials
Name
Specification
Motorcraft® Premium Windshield Wash Concentrate with BitterantZC-32-B2
WSS-M14P19-A
Removal
NOTE:
Removal steps in this procedure may contain installation details...
Removal
WARNING:
To prevent the risk of high-voltage shock, always follow
precisely all warnings and service instructions, including instructions
to depower the system. The high-voltage system utilizes approximately
450 volts DC, provided through high-voltage cables to its components and
modules...