Evap Two Way Valve Test - Honda Civic 2002-2003 Service Manual

EVAPSystem
EVAP Two Way Valve Test
Special Tools Required
• Vacuum pump/Gauge, 0-30 in. Hg
A973X-041-XXXXX
• Vacuum/Pressure Gauge, 0-4 in. Hg 07JAZ-0010008
1. Remove the fuel fill cap.
2. Disconnect the vapor line from the EVAP two way
valve (A). Connect it to aT-fitting (8) from the
vacuum gauge and the vacuum pump as shown.
A973X-041-XXXXX
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A
B
3. Apply vacuum slowly and continuously while
watching the gauge. The vacuum should stabilize
momentarily at 0.8-2.1 kPa (6-16 mmHg,
0.2-0.6 in.Hg).
If the vacuum stabilizes (valve opens) below 0.8 kPa
(6 mmHg, 0.2 in.Hg) or above 2.1 kPa (16 mmHg,
0.6 in.Hg), install a new valve and retest.
11-186
4. Move the vacuum pump hose from the vacuum
fining to the pressure fitting, and move the vacuum
gauge hose from the vacuum side to the pressure
side (A) as shown .
A?
A973X-041-XXXXX \
~~§~~~
5. Slowly pressurize the vapor line while watching the
gauge. The pressure should stabilize momentarily
above 1.0 kPa (8 mmHg, 0.3 in.Hg) .
• Ifthe pressure momentarily stabilizes (valve
opens) above 1.0 kPa (8 mmHg, 0.3 in.Hg), the
valve is OK.
• If the pressure stabilizes below 1.0 kPa (8 mmHg,
0.3 in.Hg), install a new valve and retest.
•