Honda Civic Service Manual page 558

Emission Control System
Evaporative Emission {EVAP) Controls (cont'dl
\ J
tF1456-l
tP14sz-l
EVAP
CONTROL
CANISTER
VENT
SHUT
VALVE
O.RING
Replace.
EVAP
CONTROL
CANISTER
ECM/PCM CONNECTOR A I32PI
( T o p a g e 1 1 ' 2 8 9 )
'99 - 00 modols except Dl6Y5 engine with M/T:
The scan tool indicates Diagnostic Trouble Code (DTC) P1456: Evaporative Emission (EVAP) control system leak
detected (fuel tank svstem).
The scan tool indicates Diagnostic Trouble Code (DTC) P1457: Evaporative Emission (EVAP) control system leak
detected (EVAP control canister system).
Possible Cause
. Fuel fill cap
. Vacuum Connections
. F u e l T a n k
. EVAP Control Canister Vent Shut Valve
. EVAP Control Canister Vent Shut Valve Circuit
. EVAP Purge Control Solenoid Valve
o EVAP Purge Control Solenoid Valve Circuit
. EVAP Bypass Solenoid Valve
0 - 3 0 i n , H g
. EVAP Bypass Solenoid Valve Circuit
. Fuel Tank Pressure Sensor
. Fuel Tank Pressure Sensor Circuir
. EVAP Control Canister
. ORVR vent shut valve
. ORVR vapor recirculation valve
. Throttle Body
Troubleshooting Flowchart
VACUUM
PUMP/GAUGE,
A973X - oal -
xxxxx
T-t
t \
The MIL has been reported on.
DTC P1456 o. P1457 is stored.
Check the EVAP cont.ol canister
vent shul valve:
1. Disconnect the vacuum hose
f r o m t h e E V A P t h r e e w a y
valve and connect a vacuum
pump to the hose.
2 . R e m o v e t h e E V A P c o n t r o l
canister vent shut valve from
tne canrster.
3. Turn the ignition switch ON (ll).
4. Apply vacuum to the hose.
Check for a short in the wiro
(VSV linel:
Disconnect the 2P connector from
t h e E V A P c o n t r o l c a n i s t e r v e n t
D o e s t h e v a i v e h o l d v a c u u m ?
RoDair 3hort in the wire botwe€n
the EVAP control canilter vent
shut valve and the ECM/PCM
{A4t.
Does the valve hold vacuum?
Check the EVAP cont.ol canister
v€nl shut valve:
1. Turn the ignition switch OFF.
2. Connect ECM/PCM connector
t e r m i n a l A 4 t o b o d y g r o u n d
with a jumper wire.
3. Turn the ignition switch ON (ll).
4. Apply vacuum to the hose.
Reolace the EVAP control canis-
ter veni shut valve.
Does the valve hold vacuum?
W i r e s i d e o f f e m a l e t e r m i n a l s
11-288
lTo page 11-289)