OTC LeakMaster 6525 Manuel De L'opérateur page 9

Phase One
8. Insert the supply hose from the tester into the EVAP
service port adapter. See Figure 6.
9. Close the vehicle's EVAP system vent solenoid.
10. Set the tester's control valve to TEST.
11. Press the remote start button to activate the tester.
At the beginning of the test procedure, the flow
meter's indicator-ball is toward the top of the
flow meter scale. This indicates the EVAP System
is being filled. Usually in less than 60 seconds
– depending on capacity and fuel system level –
the ball will fall within the meter's visible scale.
Continue to fill the system until the ball stops
descending. This could take an additional two
minutes.
The timer will automatically turn OFF in five
minutes. (The tester will turn OFF if the remote
switch is pressed again before the 5 minutes has
elapsed).
12. Once the flow meter's ball stops descending,
observe if the ball is above or below the red flag.
See Figure 7.
• A measurement ABOVE the pointer-flag
indicates an unacceptable leak in the EVAP
System (FAIL). Proceed to Phase Two.
• A measurement BELOW the pointer-flag
indicates no leak (or an acceptable leak) in
the EVAP System (PASS).
Fail
Pass
Figure 7
8
Supply
Line
Figure 6
Tech Tips
• When testing a pre-OBD vehicle, or when
testing an OBD vehicle without an EVAP
service port, access the EVAP system in one
of two ways: disconnect the EVAP vent line
leading back to the fuel tank; or go through
the fuel tank neck using a fuel neck adapter
(not supplied).
• A common leak in a vehicle's EVAP system
is due to an unsecured or faulty fuel cap.
We recommend NOT disturbing the fuel
cap before completing Phase One.
If an unacceptable leak has been deter-
mined after completing Phase One, you can
reposition or test the fuel cap, then perform
Phase One again. You may discover the
leak was due to a fuel cap problem.
If you disturb the fuel cap before perform-
ing Phase One, and the vehicle passes the
test, you will never know for sure if the
leak was due to the fuel cap or if you are
dealing with an intermittent condition.
Service Port
Service Port
Adapter