1996 HONDA CIVIC D16

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'96 Dl6Y5 engine,'96 D16Y8 engine (sodanl,'97 Dl6Y5 sngino,'97 Dl6Y8 sngine (sedan: KA, KC modols):
EVAPTWO WAY
EVAPPURGECONYROLSOLENOIDVALVEVALFromNo. 15
BLK/YEL__ _ < ALTERNATOR- SP SENSOR
FUELFILLCAP
VARIOUSSENSORS
(cont'd)
11-269
I
'96 D16Y' engin.,.9? D16Y7 engine {coupe: KA, KC models, sedan: KA. KC, Kl- IDX) modols, hatchback: all models}:
FromNo. 15
3lI/- - - -{ ALTERNAT'RSP SENSORRED/YEL
EVAPPUBGECONTROLSOLENOIDVALVE
FUELFILLCAP
8LK
+
t\,"ro*,
MANIFOLD

Emission Control System
Evaporative Emission (EVAPI Controls (cont'd)
'99 - 00 Dl6Yg engine,'99 - 00 Dl6Y5 €ngine,'99 - 00 81642 engine:
FUELTANKPRESSURESENSOR
EVAPBYPASSSOLENOIDVALVE
From
BLK/ - No. 15
YEL _ ALTERNATORSP SENSOR
{7.5 A)
- GRN/BLK
BLU
*=ol
LT GRN/WHT
ONBOARD REFUELING
FUEL TANK
EVAP PURGECONTROLSOLENOID VALVE
EVAPORATIVEEMISSION {EVAP)CONTROLCANISTERFILTER
YEL
LT GRN
VAPOR RECOVERY IONVR) VENTSHUT VALVE
ONBOARD REFUELINGVAPOR RECOVERY IORVN} VAPORRECIRCULATION VALVE
'99 - 00 D16Y7 engine:
EVAP CONTROLCANISTER
BLK/YEL
FromNo. 15< ALTERNATORSP SENSOR{7.5 A}FUELTANKPRESSURESENSOR
EVAPEYPASSSOLENOIDVALVE
- BLULT GNN/WHT
EVAP PURGECONTROLSOLENOIO VALVE
INTAKEMANIFOLD
EVAPTWO WAYVALVE
FUEL TANK
ONBOARD REFUELINGVAPOR RECOVERY {ORVRI VENTSHUT VALVE
EVAPORATIVEEMISSION {EVAPICONTROL
EVAP CONTROL
ONBOARD REFUELINGVAPOR RECOVERY IORVRI VAPORRECIRCULATION VALVE
CANISTERFILTER
YELI
8LK
11-270
CANISTER

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,96 D16Y5 engine,,96 D16r,gngino,,96 Dt6Y8 engine {3edan)' 37 D16Y5 engino..97 D16r, engine {coupe: KA, Kc mod-
els. sedan: KA, KC, KL {DX} models. hatchback: all modols}''97 Dl6Y8 ongine (s€dan: KA' KC mod€lsl:
The scan tool indicates Diagnostic Trouble code (DTC) P0441: Evaporative Emission (EVAP) control system
insufficient purge flow.
Description
By monitoring the purge line vacuum with the MAP sensor, the ECM/PCM can detect insufficient EVAP control system
purge flow.
Possible Cau3e
. EVAP Purge Control Solenoid Valve
. EVAP Purge Control Solenoid Valve Circuit
. EVAP Control Canister
. Vacuum Lines
. ECM/PCM
Troubl93hooting Flowchart
Wire side of femaleterminals
EVAP PURGE CONTROI-sottNotD vALvE 2P
CoNNECTOR (Cl1al
r-+-r
I'l'l
lG-ro.*l'rr"r
O)
Y
(cont'd)
11-271
- The MIL has bsGn.eportad on.- DTC milal k rtored.
Pioblem vsrificJtion:1. Start the engine. Hold the
engine at 3,000 rPm with no
load {in Park or noutral) until
the radiator fan comes on.
2. Do the ECM/PCM Reset Proce'
dure,3. Connect the SCS service con-
nector.4. Test-drive under following con-
ditions on the road- Without any electrical load- A/T in E or E Position(M/T in 3rd-sth gear)- Engine sPeed betweon
1,200 - 2.400 rpm.- Decelerate {rom 50 mph (80
knl/h)to 15 mph (24 km/h)lntormittont lailuro, sFtorn b OK
at thi. timo. Ch€ck tor Poor con'
ncction3 or looac wir.3 at C144
{EVAP purgo control tolonoid
vrtv.l .nd ECir/FCttl.
ls DTC P0441 indicatod?
Ch.ck fo. !n op€n in the wiro l|(illinel:1. Turn the ignition switch OFF.
2. Disconnect the EVAP Purgecontrol solenoid valve 2P con_
neclor,3. Turn the ignition switch ON (ll)
4. Measur€ voltage between bodyground and the EVAP Purgecontrol solenoid valve 2P con-
nector terminal No 1.
Rop.ir opor in tho wir6 b€two€n
the EVAP purgo codtiol tolonoid
v.lvo rnd tho No 15 ALIERNA'
TOR SP SENSOR 17.5 A)lu.o.
{To page 11-272)

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(From page 11-272)D16Y5 engine:
JUMPER WIRE
D16Y7, D16Y8 engine
VACUUMPUMP/GAUGE,
VACUUMPUMP/GAUGE,0 - 30 in.HgAs73x - 0il1 -
xxxxx
0 - 30 in.HgA973X -
otl -
xxxxx
I
EVAP CONTROLCANISTER
ECM/PCM CONNECTOH D I32PI
VACUUM/PBESSUREGAUGE0-4in.Hg07JAZ - 0010008
Wire side otfemale terminals
D16Y7, Dl6Y8 engine:
t
VACUUM/PRESSUREGAUGE0-4 in.Hgo?JAZ - 001fl)OB(cont'd)
11-273
PGl IBLKI
Check lhe EVAP Purge control
solsnoid valve:
1. Disconnect the vacuum hose
from the EVAP controlcanister'
2. Connect the vacuum PumP to
the hose and aPPIY vacuum
Does it hold vacuum?
Check the EVAP control canister:
1. Reconnect the vacuum hose to
the EVAP control canlster.
2. Connect the vacuum/Pressuregaugeto the Purge aar hose
3. Connect ECM/PCM connector
terminals A15 and A10 with a
iumper wire.4. Start the engine5. Check the vacuum
Check the EVAP two way valve(see page 11-193)
Does the EVAP two waY valveReplace the EVAP two wsY valve.
Sub3titute a known-good ECM/
PCM .nd recheck. lt symPtom/
indicrtion go6s away, rePlace the
original ECM/PCM.
D16Y5 sngin€:

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Fuel Tank Pro3sure sensor 196 D16Y8 engine (coupe).'97 D15Y7 engine {coupe: KL model, sedan: KL (LX) modeu,'97
D16Y8 engine (coupe: all models, sedan: KL model, '98-all models) '99 - 00 D16Y5 engine with M/Tl:
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PTANK
{LT GRNI
vcc2(YEL/BLU}
Wire side oI female terminals
FUEL TANKPRESSURE SENSOR3P CONNECTOR (C7921
sG2IGRN/8LK)
Foc2l::il":"toolindicatesDiagnosticTroublecode(DTc)P0452:A|owvo|tageprob|emintheFue|TankPressure
The fuel tank pressure sensor converts fuel tank absolute pressure into electrical signals and inputs the EcM/PCM.
OUTPUTVOLTAGEtvt4.5
-? kPa(-50 mmHg,-2 in.Hg)
ECM/PCM CONNECTOR O I16P)
Wire side of female terminals
+7 kPs150 mmHg,2 in.Hg)
PRESSURE
(cont'd)
11-275
- The MIL has been reported on- DTC P0452 is stored.
Check the vacuum lines:
Check the vacuum lines of the
fuel tank pressure sensor for mis-
routing, leakage, breakage and
cloggrng.
Are the vacuum lines OK?
Problem v€ritication:1. Do the ECM/PCM Reset Proce
dure.2. Remove the luel fill caP.
3. Turn the ignition switch ON lll)4. Monitor the FTP Sensor volt_
age with the Honda PGM
Tester, or measure voltage
between bodY ground and
ECM/PCM terminal Dl5.lntermittent tailuro, sYstem i5 OK
dt this timo. Chock for Poot con-
neciion3 or loose wir* at C131
llocatod under right side ot dashl,
C4O1 (located .bove under'da3htuso/ielay box), C574 1C568)*
{located under acc€ss Panell.C792 lfuel tank pressule sen3or)
and EcM/PCM.
ls there approx. 2.5 V?
Check tol an op€n in wite (VCC2
line):1. Turn the ignition switch OFF
2. Reinstallthe fuel fill caP.3. Disconnect the fuel tank Pres'sure sensor 3P connector-4. Turn the ignition switch ON (ll)
5, Measure voltage between the
fuel tank pressure sensor 3P
connector No. l terminal and
No. 2 terminal.
Repair open in the wite betweenthe fuel tank Pr€s3ure a€n3or andth6 EcM/PcM (D1ol.ls there approx. 5 V?
(To page 11'276)

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Fue| Tank Pr€ssure sensor 196 Dr6Y8 engine (coupe},,97 D16Y7 angino (coupo: KL mode|' 3edan: KL (Lxl modg||',97
Dl6Y8 engine (coupe: all modeb, sedan: Ki model.'98'all modols) 39 - 0O Dl6Y5 ongins with M/Tl:
rFoG'l::;Jl"too|indicatesDiagnosticTroub|ecode(oTc)P0453;Ahighvo|tageprob|emintheFue|TankPressure
ECM/PCM CONNECTOR D Il6PI
PTANKILT GRNI
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Wire side of tgmale torminals
FUEL TANKPRESSURE SENSOR3P CONNECTOR (C792)
vcc2(YEL/BLU}
sG2(GRN/BLKI
Wire sid€ of female terminals
I
sG2IGRN/BLKI
PTANKIGBN/RED}
(cont'd)
11-279
The MIL has beon reponed on
DTC P0453 b stored.
Check the vacuum lines:
Check the vacuum lines oI the
fueltank pressure sensor for mis-
routing, leakage, breakage and
clogging.
Are the vacuum lines OK?
Problem verification:1. Do the ECM/PCM Reset Proce-
dure.2. Femove the fuel fill cap
3. Turn the ignition switch oN (ll).
4. Monitor the FTP Sensor volt-
age with the Honda PGM
Tester, or measure voltage
between bodY ground and
ECM/PCM connector termrnal
D15.
lntormittont t iluro, 3Ystem is OK
at this time. Check lot Poor con_
noctiona or loo3e wirat at C131
{loc.ted undor right 3id6 of d8hl,
CaOl llocatod rbov. under-dalh
fus6/relay boxl, C574 (C568lr
llocatod und6l accoss Pan6ll,C792 lfuel tank Preasulo aonlorl
end ECM/PCM.
ls there approx. 2 5 V?
Check for an oPen in the wire(SG2line):1. Turn the ignition switch OFF.
2. Reinstall the fuellill cap
3. Disconnect the fuel tank Pres-sure sensor 3P connector.
4. Turn the ignition switch ON (ll)
5. Measure voltage between the
fuel tank Pressure sensor 3P
connector terminals No. 1 and
No.2.
Ropair opon in the wira b€tw€sn
the fuel tank prasure sonlor and
ECM/PCM (Dl1).ls there aPProx. 5 V?
Check for an open in the wire(PTANK line):Measure voltage between the
fueltank Pressure sensor 3P con-
nector No. 3 terminal and No. 2
termrnal,
ls there approx. 5 V?
*: coupe
{To page 11-280)

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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
VACUUMPUMP/GAUGE,0 - 30 in.HgA973X - 041 -
xxxxx
I
EVAPCONTROL
.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
Irom the EVAP three waY
valve and connect a vacuurnpump to the hose.
2. Remove the EVAP control
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
Does the valve hold vacuum?
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 connectorterminal 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)
37I9t01t't2t3t5t6ItItt9202a2a
25aA
ILT GRN/W{T) I JUMPER WIRE
Wire side of femll terminals
(To page 11-284i(To page 11 284)
11-283

Emission Control System
Evaporative Emission (EVAPI Controls (cont'd)
Evaporative Emission (EVAPI Two Way Valve Testing
l'96 DIGYS engine lcoupel,'97 Dl6Y7 engine (coupe: KL
model, sedan: KL (LX) modoll,'97 Dl6Y8 engine {coup€:
alt models, sedan: KL model, '98-all modelsll:
1. Remove the fuel fill cap.
2. Remove the vapor line from the EVAP two way
valve. and connect it to a T-fitting from a vacuum
gauge and a vacuum pump as shown.
VACUUM/PRESSURE
IJ
f96 D16Y5 engine,'96 D16Y7 engine,'96 D16Y8 ongine
(sedanl,'97 D16Y5 engine,'97 Dl6Y7 engine {coupe: KA,
KC models, sedan: KA, KC, KL {DX} models, hatchback:
all modsls),'97 D16Y8 engine {sedan: KA, KC models}l:
1. Remove the fuel fill cap,
2. Remove the vapor line from the EVAP two way
valve on the fuel tank, and connect it to a T-fitting
from a vacuum gauge and a vacuum pump as
snown.
VACUUM/PRESSURE GAUGE,0 - 4 in.Hg07JAZ - 0010008VACUUMPUMP/GAUGE.0 -30 in.HgA973X-041 -XXXXX
Apply vacuum slowly and continuously while watch-
ing the gauge. The vacuum should stabilize momen-
tarily at 0.8 - 2.1 kPa (6 - 16 mmHg, 0.2 - 0.6 in.Hg).
lf 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.
Move the vacuum pump hose from the vacuum fit-
ting to the pressure fitting, and move the vacuum
gauge hose from the vacuum side to the pressure
side as shown.
Slowlv pressurize the vapor line while watching the
gauge. The pressure should be stabilize momentari
ly above 1.0 kPa (8 mmHg. 0.3 in.Hg).
. lf the pressure momentarily stabilizes (valve
opens) above '1.0 kPa (8 mmHg, 0.3 in.Hg), the
valve is OK.
. lf the pressure stabilizes below 1.0 kPa (8 mmHg,
0.3 in.Hg), install a new valve and retest.
Apply vacuum slowly and continuously while
watching the gauge. The vacuum should stabilize
momentarily at 0.7 - 2.0 kPa (5 - 15 mmHg, 0.2 - 0.6
in.Hg ).
lf the vacuum stabilizes (valve opens) below
0.7 kPa (5 mmHg,0.2 in.Hg) or above 2.0 kPa
(15 mmHg, 0.6 in.Hg), install a new valve and retest.
Move the vacuum pump hose from the vacuum fit-
'l'
4.
5.
ting to the pressure fitting, and move the
gauge hose from the vacuum side to the
side as shown.
PRESSURESIDE
Slowly pressurize the vapor line while watching the
gauge. The pressure should stabilize at 1.3 - 4.7 kPa
(0 - 35 mmHg, 0.4 - 1.4 in.Hg).
. It the pressure momentarily stabilizes (valve
opens) at 1.3 - 4.7 kPa (10 - 35 mmHg, 0.4 - 1.4
in. Hg), the valve is OK.
. lf the pressure stabilizes below 1.3 kPa (10 mmHg,
0.4 in.Hg) or above 4.7 kPa (35 mmHg. 1.4 in.Hg),
install a new valve and retest.
vacuum
pressure
GAUGE0- 4 in.Hg
T-FITTINGT-FITTING
11-294
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