Honda Civic Service Manual page 553

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t,96 D16Y8 engine (coup6l,'9? Dl6Y7 engine (coupe: KL model, sedan: KL
(LX) model)"g7 Dl6Y8 ongine (coupe: all mod-
els, sedan: KL model,'98-8ll modelsl 39 - 00 Dl5Y5 engine with M/Tl:
The scan tool indicates Diagnostic Trouble code (DTc) P1456: Evaporative Emission
(EVAP) control system leak
detected (fuel tank sYsteml
The scan tool indicates Diagnostic Trouble Code (DTC) P1457: Evaporative Emission
(EVAP) control system leak
detected (EVAP control canister system).
Fr4t6l
fF14s7
Possible Causs
. Fuel fill cap
. Vacuum Connections
. Fuel Tank
. EVAP Control Canister Vent Shut Valve
. EVAP Control Canister Vent Shut Valve Circuit
. EVAP Purge Control Solenoid Valve
. EVAP Purge Control Solenoid Valve Circuit
. EVAP Bypass Solenoid Valve
. EVAP Bypass Solenoid Valve Circuit
. Fuel Tank Pressure Sensor
. Fuel Tank Pressure Sensor Circuit
. EVAP Control Canister
. Throttle Body
Troublsshooting Flowchart
VACUUM
PUMP/GAUGE,0 - 30 in.Hg
A973X - 041 -
xxxxx
I
EVAP
CONTROL
.4,
cANrsrER
re ./
VALVE
{S----r*::n
\
(cont'd)
- The MIL ha3 been rePofted
on.
-
DTC P1456 or P1457 is stored.
Check the EVAP control canbtol
vent shut valve:
1. Disconnect the vacuum hose
I r o m t h e E V A P t h r e e w a Y
valve and connect a vacuurn
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 Irofi
the canrster.
3. Turn the ignition switch ON (lli
4. Apply vacuum to the hose.
Chock for . shon in the wire
(VSv linel:
Disconnect the 2P connector {rom
the EVAP control canister vent
D o e s t h e v a l v e h o l d v a c u u m ?
Repair short in the wir€ betwcen
the EVAP control canister vent
shut v.lve and tho ECM/PCM
tA29|.
Does the valve hold vacuum?
Check the EVAP control canister
vent shui valve:
1. Turn the ignition switch OFF.
2. Connect ECM/PCM connector
terminal A29 to body ground
with a iumPer wire.
3. Turn the ignition switch ON (ll).
4. Applyvacuum to the hose
Reohce the EVAP control canis-
ter vent shttt valve.
Does the valve hold vacuum?
ECM/PCM CONNECTOR A {32P)
3
7 I 9
t 0
1 t
't2 t 3
t 5 t 6 I t I t
t 9 20
2a
2 a
25
a
A
ILT GRN/W{T) I
JUMPER WIRE
Wire side of femll terminals
(To page 11-284i
( T o p a g e 1 1 2 8 4 )
11-283