Honda ACCORD HYBRID 2005 Service Manual page 660

EVAP System
D T C T r o u b l e s h o o t i n g ( c o n t ' d )
DTC P0455: EVAP System Large Leak
Detected
DTC P0456: EVAP System Very Small Leak
Detected
1 NOTICE!
The fuel system Is designed to a l l o w specified
m a x i m u m v a c u u m and pressure conditions. Do not
deviate f r o m the v a c u u m and pressure tests as
indicated in these procedures. Excessive pressure/
v a c u u m w o u l d damage the EVAP c o m p o n e n t s or cause
eventual fuel tank failure.
Special Tools Required
• V a c u u m pump/gauge, 0—30 in.Hg, Snap-on YA4000A
or e q u i v a l e n t commercially available
• Vacuum/pressure gauge, 0 — 4 in.Hg 07JAZ-001000B
NOTE: Fresh fuel has a higher volatility that will create
greater pressure/vacuum. The o p t i m u m condition for
testing is less than a full tank of fresh fuel, If possible, to
assist in leak detection, add 1 gallon of fresh fuel to the
tank (as long as it will not fill the tank), just before
starting these procedures.
1. Check the fuel fill cap (the cap must say ' T i g h t e n to
click"). It should turn 1/4 t u r n after it's tight, then it
clicks.
Is the correct fuel fill cap installed and properly
tightened?
Y E S — G o t o step 2.
NO—Replace or tighten the cap, then go to step 24.
2. Check the fuel fill cap seal (A) and the fuel fill pipe
mating surface (B). Verify that the fuel fill cap tether
cord (C) is not caught under the cap.
Is the fuel fill cap seal missing or damaged, is the
fuel fill pipe damaged, or is the tether cord caught
under the cap?
YES—Replace the fuel fill cap or the fuel fill pipe,
then go to step 24.
NO — G o t o step 3.
3. Turn the ignition switch ON (II).
4. Clear the DTC w i t h the HDS.
5. Do the EVAP FUNCTION TEST in the INSPECTION
MENU w i t h the HDS.
Is the result OK?
Y E S — I n t e r m i t t e n t failure, system is OK at this time,
Check for poor connections or loose terminals at
the FTP sensor, the EVAP canister purge valve, or
the EVAP canister vent shut valve and the PCM. •
N O — G o t o step 6.
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