emission HONDA INTEGRA 1994 4.G User Guide

G) FUEL PUI-SATION DAMPER
@ AIR CLEANER(D RESONATOR6 imrlre arR Bypass (tAB) coNTRoL DIAPHRAGM
VALVE(D) IITITP IIN BYPASS {IAB) COTROL SOLENOID VALVE
ds) INTIXT AIR EYPASS TIABI VACUUM TANK
rio'l rnrarg ltn BYPASS (lABl cHEcK vALvE
6 rsnee wav cATALYTtc coNvERTER lrwc)
6 posrnve cRAf{KcAsE vENTILATIoN {Pcv) vALVE
6 evlponlrtve EMtsstot{ tEvAPl coNTBoL cANlsrER
6 evlponltvE EMtssloN {EvAP} PURGE coNTRoL
SOLENOID VALVE6i EVAPORATIV€ EMISSION (EVAPI PURGE CONTROL
DIAPHRAGM VALVE
6o ivlpoalrtve Eutsstof{ IEVAPI rwo wAY vALvE
c) HEATED OXYGEN SENSOR lHO2Sl
€) MANIFOLD ABSOLUTE PRESSURE IMAPI SENSOB
O EI{GINE COOLANT TEMPERATURE {ECT} SENSOR
€) INTAKE AIR TEMPERATURE {IAT) SENSOR
@ KNOCK SENSOR tKSl
@ IDLE alR coNTRoL llAcl vALvE
O FAST IDLE THERMO VALVE
@ FUEL INJECTOR
@ FUEL FILTER
@ FUEL PRESSURE REGULATOR
O) FUEL PUMP (FPI
@) FUEL TANK
@ FUEL TANK EVAPORATIVE EMISSION IEVAPI VALVE
11-11

E:I
I if,l.)
l;TYra-"wrrr. Ile llel/nEo II€ TcRNrwHrtlI ,ITwHr^rJl I
c214
ffi
c1
r+lrl2l
trtr
32
o
c112
r'ft]
IOTBLF------lla lsLx/YEL Ifo lanlr l]l
c111
6
\:-/
lI-FErwHr - l1olGuNlert l-l
cl1
3t
tr
c1c117lB18C1 engine)
/ r\
\^y
IETYEL/€Lh---llohED' ----,,
c216
^Jl
FFIN
c221
ffi
ldlcRr/vEr ---l
NOTE: a Different wires with the same color have been given a number suffix
YEL/BLK1 and YEL/BLK, are not the same).
O: Related to Fuel and Emissions System.
a - Connector of male terminals: View from terminal side- Connector of temale terminals: View from wire side
c215
r'fr]
fi'Twtl-rirllrlerrrltlerl-lfr-Twrr - lll
I@ LWHTTREO I
to distinguish them (for example,
(cont'd)
11-21
cl10
ohN/BLK l|/BL!
ALU/YEL

c119
A
RP
16lwHiffiN----f
l@ lwHrnco' I| 3 laL&YEr IfrlwHrEru ---
ct 20
l8lSBt.nglnrl
ET
l6TciN-6LU-----loliEo/YEi----.
cr20(Bl8Cl .ngln l
F,-f.
\?
l6-ltR,iEit----l@ IiEp/YcL I
cr33
A
.2
|o lhEo/8llJ II-T- --.-.1
NOTE: a Different wires with the same color have been given a numbe. suffix to distinguish them (for example
YEL/BLK1 and YEL/BLK, are not the same).
O: Related to Fuel and Emissions System.a - Connector of male terminals: View from terminal sid6- Connector of female terminals: Viow from wire side
24
ffi
c 123
ffi
l6'lau,-r, ---------l
IO IYEL/8LX I
c121
fr
c3t I
O
tsF
c117
lBl88l 6nginol
EI
//t\t zt
|6-I!EUBLK --'l
lO lhEo' I
c122
ffi
cl16
FI
\2
|@|iaf,-'6trlaltrlaru----1toltEUB'.f----
ct 34
,8.
\^y
f6-IPilK/BLu---lIO IYEUBL( I
11-23

c4't9
234578e nc
5t6 | -
aALUfYELYEL'
c423
c431lwlthcruit€coniroll
| 'lrl
lslnl
fitr G-Fil------lo ln/Hr/68n Ilo lciN,r/vHr Il-IcRY------l
c44il
riTLF-Iffi14l51617l
lO lGRt/8LU ITitfgruffir-----lktlBrKr--I o lYcL/Gnir Ilao laLx./YEL II "] IYEUBL( Iktlterwirr ---
c431(wlthout
crui!acontrol)
-tttI
t3
l6'TwHr/cnN ----'l
1ol cRN^vHr ----l
c439
rfltrrn
I'VCT,1
lETWrr;eo---ffrlwHr. --
l3l8rK II t lBLx,REo It5 |I 6 GRN/BLX If?-TFEpcFN --
c432
ffi
c444
ffir
trtr]
I6TLK^//Hr -l
L ' l!!g!!r llo lsLkrFED I|;TBLU'BLi l]l
NOTE: a Ditterent wires with the same color have been given a number suttix to distinguish them (fot example
YEL/BLKr and YEL/BLK, are not the samel.
O: Related to Fuel and Emissions System.
a - Connector of male terminals: View from terminal side- Connector of female terminals: View from wire side(cont'd)
11-25
12313
5BLU/YEL6
a1a
20
YEL/BLK'2Ht/aluiEO/YIL15516't7
aBL&"/EL20YEL

123467
Ir0l1 11121131 114115116
gL&YELBLK/YEL212BLKGFN,YELYEL515
I
6
GFNLT GRII/SL(9GRN/BLII5
REO/6LU28RN/8LK3BLU12BLUf/€LYEL/RED136YEL16BLUYEL/6LKt6
a DiJterent wires with the same color have been given a number sutfix to distinguish them (for example
YEL/BLK1 and YEL/BLK' are not the same).
O: Related to Fuel and Emissions System.
a - Connector ot male terminals: View from terminal side- Connector of female terminals: View from wire side
{cont'd)
11-27

c405
fr
ffi
c406
r'tr--Jl
I6TBRN/B,L( -----l
l€, lwHr/uED -__-l
l6TLr BN--- l_l
c408 {ECM-Bl
suffix to distinguish them (for examplea Different wires with the same color have been given a number
YEL/BLK1 and YEL/BLK, are not the same).
O: Related to Fuel and Emissions System.
a - Connector of male terminals: View from terminal side
Connector of female terminals: View from wire side
c410 tEGM-Al
tt4YEL'| (jtALK/AED
SLU1aALKt(9YEL| 0o)
ALK'ALK'YEL/BLKGRN/oRr l@BLK
391t3tl5
2481Cl24
IALU/REO6
ALU/YEL
BLK2YEL
56
11-29

c510
NOTE: a Ditferent wiros with tho samo color hava been given a numb€r sutfix to distinguish them {for example
YEL/BLKI and YEL/BLK, are not th€ same).
O: R€lated to Fuel and Emissions Systom.
a - Connoctor ol malo tarminals: Vi6w from terminal side- Connector ol f6msl€ tarminals: Vi€w from wire sid€
11-31

Troubleshooting
Troubleshooting Guide
NOTE: Across each row in the chart. the systems that could be sources of a symptom are ranked in the order they should
be inspected staning with O. Find the symptom in the left column, read across to the most likely source. then refer
to the page listed at the top of that column. lf inspection shows the system is OK, try the next mosr likely system O, etc,
* lf codes other then those listed above are indicated, count the number of blinks again. It the MIL is in fact blinking
^ these codes, replace the ECM.
qy, lf the MIL is on while the engine is running. connect the SCS shon connector to the service check connector. It no
code is displayed {MlL stays on steady), the back-up system is in operation.
Substitute a known-good ECM and recheck. lf the indication goes away, replace the original ECM.
USA:
MALFUNCTION
INDICATOR
LAMP {MIL)
CANADA: ----l CHECK-ltGl- ENGTNE- | - LTGHT
- { -1t-
* * *: 818C1 engine
1-32
SYMPTOM
PGM.FI
ENGINECONTROLMOOULE
HEATEOOXYGENSENSOR
MANIFOLOAESOLUTEPRESSURESENSOR
TOP DEAD CINTTR/CRANKSHAFTPOSTT|ON/CYLINDERPOSITION SENSOR
ENGINECOOLANTTEMPfRA.TURTSENSOR
THROTTTEPOStTtONSENSOR
INfAKE AIRTEMP€RA.TUREsar,rs0R
BARO.METRICPRESSURESENSOR
IGNITIONOUTPUTSIGNAL
vEHtct-ESPfEDSENSOR
11.4246, 47,5011-56l1-581l-6011-6211-641t-661r-68
MALFUNCTION INOICATORLAMP (MIU" TURNS ON1 lor:t:]:lrmr:- i;:i'-tK3t-16l-16l'-\-16l/-----\
-r:+r-
-{"Pr:-o_-16l-.z-\r6t/_-\
MALFUNCTION INOICATORLAMP (MIL)'' BLINKS:O. or-8.-D:o.:@.
o, O'l3l/__-\.E-o.:O: or tr]--i !l/ -i-\| 7 t-/__-\
--l-l-l r0 I/----\| 13 |z_---\
\.--r--l
I r5 t-/.---\-t 17 t-/-]-\
ENGINE WON'T STAffTo@@
DIFFICULT TO STARTENGIN€ WHEN COLO@@(9)o
IRREGULARIDLING
WHEN COTDFAST IDLEouT 0f sPtc@@
ROUGH IDLE@o
RPM TOOHIGH@@
RPM TOOLOW@
FREOUENTSTALLING
WHILE@@
AFTER@
POOnPERFOEM.ANCE
MISFIRE ORROUGHRUNNING@@@
FAITSEMISSIONTEST@@@
Loss 0FPOWER@@@

3. Fuel Cut-oft Control
a During deceleration with the throttle valve closed, current to the {uel injectors is cut otJ to improve fuel economy
at speeds over tollowing rpm:
. 8188l engine: 91O tpm (Canada model: 1,O50 rpm)
. 818C1 engine: 95O tpm (Canada model: l,O5O rpm)
a Fuel cut-olf action also takes place when engine speed exceeds, 7,O0O rpm {81 8B1 engine), 8,1O0 rpm (B 18Cl
engine), regardless oI the position of the throttle valve, to protect the engine from ovet-revving.
A/C Compressor Clutch Relay
When the ECM receives a domand for cooling trom the air conditioning system, it del8ys the compressor from being
enetgized, and enriches the mixture to assure smooth transition to the A/C mode.
Evaporative Emission (EVAP) Purge Control Solenoid Valve
When the engine coolant tempersture is below 163oF {73"C), the ECM supplies a ground to the EVAP pu.ge control
solenoid valve which cuts vacuum to the EVAP purge control diaphragm valve.
Intake Air Bypsss (lAB) Control Sol€noid Valve
When the engine rpm is below 5,750 rpm, the IAB control solenoid valve is activated by a signal from the ECM,
intske air flows through the long intake path, then high torque is delivered. At spaeds highe. than 5,750 rpm, the
solenoid valve is deactivated by the ECM, and intake air flows through the short intake path in order to reduce the
resistance in airflow.
ECM fail-safe/bEck-up Functions
1. Fail-sate Function
When an abnormality occurs in a signal from a sensor, the ECM ignores that signal and assumes a pre-progtammed
value tor that sensor that allows the engine to continue to run.
Back-uD Function
When an abnormalitv occurs in the ECM itself, the fuel iniectors are controlled by a back-up citcuit independent of
the system in order to permit minimal driving.
Self-diagnosis Function IMaltunction Indicator Lamp {MlL)1
Wh6n an abnormality occurs in a signal from a sensor, the ECM supplies ground for the MIL and stores the code
in erasable memory. When the ignition is initially turned on, the ECM supplies ground tor the MIL tor two seconds
to check the MIL bulb condition.
Two Trio Detection Method
To prevent tals€ indications, th€ Two Trip Dstection Method is used for the HO2S and fuel metering-related self-
diagnostic tunctions. When an abnormslity occurs, the ECM stores it in its memo.y. Wh€n the ssme sbnormality
recurs alter the ignition switch is turned OFF and ON ag8in, the ECM informs the driver by lighting the MlL.
However, to ease troubleshooting, this function is canc€ll€d when you short the service check connector. The MIL
will then blink immedistelv when an abnormality occurs.
4.
6.
2
4.
11-41

ldle Gontrol System
System Troubleshooting Guide
NOTE:
a Acrosa each row in the chan, the sub-systems that could be sources of a symptom are ranked in the order they should
be inspected, starting with O. Find the symptom in the left column, read across to the most likely source, then reler
to the page listsd at ths top ot that column. It inspection showa the system is OK, try the next system @, etc.
a lf the idle speed is out of sp€cification and th€ Malfunction Indicator Lamp {MlL) does not blink Diagnostic Trouble
Code (DTC) 14, 9o to inspection describ€d on pags 1 1-81.
PAGE
SYMPTOM
IDTIOJUSTIiSCREW
IDLE AIRc0NTROt-
AIRcoN0fTtoNtitcSIGNAL
ALTER.NAION FNSIGNAL
AUTOMATICIRAI{SA(LEGtARP0sm0 stGIAt
ERAK€swrTcHSIGNAL
STARTERswtTcHSIGNAT
POWERSTEERII'IGPffESSUREswncHSIGNAL
FAST IOLETHERMO
HOSESANOCONNEC.TIONS
11-9511-4211-841 1-8611-8811-9011-92I 1-9311-94
DIFFICULT TO STARTENGINE WHEN COLD@o
WHEN COLD FAST IDLE OUT OFSPEC l1,0OO- 2,0OO rpm|o@o
ROUGH IDLEo
WHEN WARM RPM TOO HIGHooo
WHEN
TOO LOW
ldl6 3p6od b b€lowspecitisd rpm (no loadl@o
ldla 5p66d doos nolincraas€ alter initialo
On mod6l3 with auto-matic transmBsion, thsidlo sp€ed drops in 963ro
ldl6 sp€eds drops when8ir condilioner in ONoo
ldls spo6d drops when6ts6iing wh66l i6 turninC@o
ldla spoed lluctust63with alactrical loado
FREOUENTSTALLING
WHILE WARMING UP@o
AFTER WARMING UPo@
FAILS EMISSION TESTo
11-78
.,Hilffirl|,