1998 HONDA CIVIC Exhaust

D16Y5 engine:
6x1.0mm12 N'm (1.2 kgl.m,8.? lbf'ft)
EGR CHAMBER
INIAKE MANIFOLDReplace if cracked orif mating surfaces are8 x 1.25 mm21 N m (2.1 kgf.m,15 tbtft)damageo,
INTAKE AIB CONTROL(IAC) VALVE (M/TI
8 x'1,25 mm22 N.m (2.2 kst m, 16lblftl
8 r 1.25 mm2a N.m (2.4 kgt m,17 rbt.ft)
EXHAUST GASRECIRCULATION(EGRIVALVE
8 x 1,25 mm22 N.n 12.2 kol'm,16 tbftr)
INTAKE MANIFOLDBRACKET
8 x 1.25 mm23 N.m 12.3 kgf'm,17 tbt fr)
(cont'd)I
9-3

Exhaust Manifold
Replacement
NOTE: Use new gaskets and self-locking nuts when reassembling.
CAUTION:
. Check for folds or scratch€s on the surface of the gasket.
. Replace with a new gasket it damaged.
D16Y5. D16Y7 engines:
I x 1.25 mm24 N.m {2.4 kgt.m, 17 tbtft}
MANIFOLDBRACKET
PRIMARY HEATEDOXYGEN SENSORIPRIMAFY HO2SI44 N.m {4.5 kgf m, 33 lbtft)Replacement, page 9-12
GASKETReplace.
I x 1.25 mm31 N.m (3.2 kgf.m,23 tbf.ft)Beplace.
WAY CATALYTICCONVERTER {TWCIlnspection, page 9'12
6x1.0mm11 N.m {1.1 kgt m,8 lbf.ft)
SECONDARY HEATEDOXYGEN SENSOR(SECONDARY HO2S}44 N.m 14.5 kgf.m,33 lbf.ft)Replacement, page 9-13
9-6

D15Y8 engine:
8 x 1.25 mm2,1 N.m (2.a kgf'm,
17 tbf.ftl
GASKETReplace.
8 x 1.25 mm31 N.m 13.2 kgf'm,23 lbf.ftlReplace.
PRIMARY HO2S44 N.m (4.5 kgf.m, 33 lbtft)Replacement, page 9-13
EXHAUST MANIFOLDBRACKET10 x 1.25 rnm
(cont'd)
9-7
/r4 N.m {4.5 kgf.m, 33 lbf.ft)
v

Exhaust Manifold
Replacement (cont'dl
NOTE: Use new gaskets and self-locking nuts when reassembljng.
CAUTION:
. Check for folds or scratches on the surface ot the gask€t.
. R€place with a new gaskot if damagod,
B16A2 engine:
GASKETReplace.
10 x 1.25 mm44 N.m {4.4 kgt.m,33 tbl.ft)SELF.LOCKING NUT8 x 1 .25 mm31 N.m (3.2 kg{.m, 23 lbf.ft)Replace-EXHAUST MANIFOLDBRACKET
10 x 1.25 mm4{ N.m (4.5 kgf.m. 33 tbt.fil
9-8

Exhaust Pipe and Muffler
\
Replacement
NOTE: Use new gaskets and self-locking nuts when reassembling
D16Y5, D16Y7 engines:
HEAT SHIELO
6x1.0mm9.8 N.m tl.0 kgf'm,7.2lbf'ft)
EXHAUST PIPE B
EXHAUST PIPE TIP
/
O
6x1.0mm9.8 N.m 11.0 kgt m, 7.2 lbf'ftl
oP----------------8 x 1.25 mm22 N.m 12.2 kg .m,
16 tbf.f Replace.Tighlen the bolts insteps, alternatingside to-side.
8 x 1.25 mm22 N.m 12.2 kgl'm, 16lbl'ttl
Replace.Tighten the bolts in steps,
alternating side-to-side
GASKETReplace.
SELF-LOCKING NUT
8 x 1.25 mm16 N.m 11.6 kgt m, 12 lbt'ftl
Replace.
(cont'd)
9-9
MUFFLER
neOlace. ----------"+@
SELF.LOCKING NUT10 x 1.25 mm33 N.m (3.4 ksd.m,25 lbf.frlReplace.

Exhaust Pipe and Muffler
Replacement {cont'dl
NOTE: Use new gaskets and self-locking nuts when reassembling.
D16Y8 engine:
MUFFLER
HEAT SHIELD
6x1.0mm9.8 N.m (1.0 kgl m, 7.2 lbf.ft)
EXHAUST PIPE
SECONDARY HO2544 N.m {4.5 kgl.m, 33 lbtftlReplacement, page 9-10
GASKETSReplace.
EXHAUST PIPE A
SELF-LOCKING NUT10 x 1.25 mm54 N.m {5.5 kgl.m, 40 lbtft}Replace.16 N.m {1.6 kgl.m, 12lbf.ft}Replace-
d'*'ou"'"'""'
6x1.0mm9.8 N.m (1.0 ksf m,7.2lbf ft)
8 x 1.25 mm22 N.rn 12.2 kgl.m,16 tbt.ft)Replace.Tighten the bolts insteps, alternatrngside-to-side.
SELF.LOCKING NUT10 x 1.25 mm33 N.m {3.4 kgf.m,25 tbtftlReplace.
TWCinspection, page 9-12
I x 1-25 mm22 N m (2.2 kgf.m. 16 lbfft)
Tighten the bolts in steps,alternating side'to sade.e)GASKETHeplace.
9-10

816A2 engino:
MUFFLER_.,. EXHAUST PIPE
-/- tlP
g
\6r1.omm
9.8 N m 11.0 kgf'm, 7.2 lbl'ttl
GASKETReplace.
8 x 1.25 mm2. N'm 12.2 kgl-m,t6 tbtf0Replace.Tighten the bolts insteps, alternatrngside-to-side.6x1,0mm9,8 N.m 11.07.2lbl4rl
SELF-LOCKING NUTl0 x 1.25 mm
3:t N.m {3.4 kgf m,24lbf'ftl
ReDlace.PRIMARY IIEATEDOXYGEN SENSOR{PRIMARY HO2S)ll N.m (4.5 kgl.m,33 tbt f0Replacement,
SECONDARY HEATEDOXYGEN SENSOR{SECONDARY HO2SIlrt N.m 14.5 kgf.m,33 rbl.ft)Replacement, page 9-13
GASKETR€place.
twcInspection, page 9-12GASKEISReplace.
SELF.L(rcKNG NUT10 x 1.25 mm5,r N.m 15.5 kgf.m, ,|{} lbf.ft)ReDlace.
8x1.25mm22 N.m {2.2 kgt m, 16 lbf.ftlReplsce.Tight6n the bolts in st6ps,alternating side-to-side.8 x 1.25 mm16 N.m 11.6 kgt.m,12 rbf.ft)F€pl8ce.
I
Replaca.
9-11

!
Fuel and Emrsslons
SoecialToofs .....,...."..,. 11-2
Component Locations
lndex ....................., ......... 11-3
Svstem Description
Vacuum Connections ................,,..,.. ......... 11-12
Electrical Connections ...............,.,.,... ....... 11-29
System Connectors ........,.,.,.......................... 1 1-51
Troubleshooting
Troubleshooting Procedures ................. .. 11-81
Engine Control Module/PowertrainControl Module TerminalAfiangement ....,.,..... 11-88
Diagnostic Trouble Code Chart .................,., 11.97
How to Read Flowcharts .,.......................... . 11-103
PGM-Fl System
System Description ...... 11-10,1
Troubleshooting Flowcharts
Engine Control Module/PowertrainContlol Module ........ 11-107
Manitold Absolute Pressure Sensor .....'. . ... 11-115
fntake Air Temperatuie Sensor ..... . . ., . 11'121
Engine Coolant Temperatuae Sensol ........., 11-128
Throttle Position Sensor ...................,........... 11-132
Primary Heated Orygen Sensor (Sensor 1l ... 11-139
Secondary Heated Oxygen Sensor(Sensor 21.................................................... 1 1-153
Heated Oxygen Sensor Heater ...................,. 11-157
Fuel Supply System ...... 11-164
Random Mislire ......., ..11-166
Misfire Detected in One Cylindsr ................. 11-167
Knock Sensor .,.,............ 11-170
CKP/TDC/CYP Sensor ................................... 11'172
Vehicle Speed Sensor ...........,......,...,.,........... 1t-176
Barometric Pressure Sensor ...............,......... I 1-178
Electrical Load Detector,.,,............................ 1 1-179
CKF Sensor .................... 11-183
ECM/PCM Internal Circuit ............................. I 1-188
A/T Signal {TMA/TMBI .................................. I 1-189
ldle Control System
System Doscriplion ............ 11-190
Troubleshooting Flowcharts
ldle Control System ...... 11-192
ldle Air Control Va1ve .................................... I 1-19i1
Starter Switch Signal .................................... 1 1'202
Air Conditioning Signal ................................. 11'201
Ahernator FR Signal .................................... . 1 1-208
BrakeSwitch Signal ..................................... f 1"210
Power Sleering Prossure Switch Signal ......11-212
A/T Gear Position Signal ............................... 11-216
Clutch Swiich Signal ................................-.... 11-214
ldte Speed Setting . .............11-220
Fuel Supply System
Fuel Lines .,...................,.,.,.,11-221
Fuef Tube/Ouick-Connect Fittings ..........,.,........ 11 -227
System Description ....'.... 11-230
Fuel Pressure .......,.,,........... 11-230
Fuef fniectors ......................11-232
Fu€f Pressure Regulator .....,.......................'...,. 11-231
Fuef Fifter ............................11-235
Fuel Pump .............'.......'.... 11-236
PGM-FI Main Relay .............11'237
Fuel Tank ................ ....,...'.'.' 11'211
Intake Air System
System Description ....-.-.....11-243
Air Cfeaner ...........,......."". .11-211
Throttle Cable .....................11-211
Throttfe Body ........ ..'... . . .,.11-211
Fuel Iniestion Air Control System ,.,.,....-........... 11-250
Emission Control System
System Description .-..........11-252
Taifpip€ Emission ...............11-252
Three Way Catafytic Convert€r ............,.,,.,.,.,.... 11 -252
Exhaust Gas Racirculaiion System ...,.,,,,.,.,.,.,,. 11'254
Positive Crankcas€ Ventilation System .... . . .. 11-266
Evaoorative Emission Controls ..................,,..,.,. 11 -267