1999 HONDA CIVIC Exhaust pipe

PGM-FI System
Fuel Supply System
D017-il Th""""ntool indicates Diagnostic Troubte Code {DTC) p0171;Thefuet system istoo lean.
1P0172 | fne scan tool indicates Dlagnostic Trouble Code (DTC) P0172:Thefuel system istoo rich.
Description
By monitoring the Long Term Fuel Trim, long term malfunctions in the fuel system will be detected.lf a malfunction has been detected during two consecutive trips, the MIL will come on and DTC P0171 and/or P0172 will bestored.
NOTE: lf some of the DTCS listed below are stored at the same time as DTC P0171 andlot P0172, ltouhleshoot those DTCSfirst. then recheck for DTC P0l7l andlot P0172.
P0106-8, P1128*3. *5, P1129*3 *5 MAP Sensor
P0135; Primary HO2S Heater
P0137. P0138: Secondary HO2S
P0'141: Secondary HO2S Heater
P0401: EGR Flow Insufficient*1
P0441: EVAP System Insufficient Purge Flow*6
P1259: VTEC System*,
P1491:EGR Valve Lift Insufficient*r
P1498: EGR Valve Lift Sensor Hjgh Voltage*r
*r: D16Y5 engines*': Dl6Y5, D16Y8, 81642 engine*3: '97 models*a:'96 modelsf 5: '98 - 00 models*6: '96 D16Y5 engine,'96 D16Y7 engine,'96 D16Y8 engine (sedan),'97 D16y5 engine,,97 D16y7 engine (coupe: KA, KC mo+els, sedan KA. KC, KL (DX) models. hatchback; all models),'97 D16Y8 engine (sedan: KA, KC models)
Possible Cause
DTC P0'171
loo lean
DTC P0172
too rach
Fuel Pump insuff icient f lovpressure
Fuel Feed Line clogged, leaking
Fuel Pressure Regulator stuck open
Fuel Filter clogged
Fuel Injector clogged, air inclusion
Gasoline doesn't meet Owner's Manual spec.
Primary HO2S (Sensor 1) deteriorated
MAP Sensor range/performance*.
EGR System malfunction (too much flow)*1
Valve Clearance
Exhaust leak
Fuel Pressure Regulator clogged, stuck closed
Fuel Return Pipe clogged
Fuel Injector leaking
Gasoline doesn't meet Owner's Manual spec.Primary HO2S (Sensor 1) deteriorated
MAP Sensor range/performance*a
EGR System insufficient flow*1
EVAP Purge Control Solenoid Valve leaking, stuck opened
Valve Clearance
11-164

Emission Gontrol System
System Description
The emission control system includes a Three Way Cata-lytic Convener (TWC), Exhaust Gas Recirculation (EGR)
system,. Positive Crankcase Ventilation (pCV) system andEvaporative Emission (EVAP) Control system. The emis-sion control system is designed to meet federal and stateemission standards.*: D16Y5 engine
Tailpipe Emission
Inspestion
@@ Do not smoke during ihis procedure. Keepany open flame away from your work area.
1. Start the engine. Hold the engine at 3,000 rpm withno load (in Park or neutral) until the radiator fancomes on. then let it idle.
2. Connect a tachometer.
Check and, if necessary, adjust the idle speed (see
page 11-220 - 223).
Warm up and calibrate the CO meter according to themeter manufacturer's instructions.
Check idle CO with the headlights, heater blower,rear window defogger, cooling fan, and air condition-er off.
NOTE: (Canada) Pull the parking brake lever up.Start the engine, then check that the headlights areoff.
CO mete. should indicate 0.1% maximum.
NOTE: '98 Dl6Y5 engine - lf the idle speed incress-es to 8101 50 rpm, this means the EVAp system ispurging the canister. To stop the purging temporari-ly. raise the engine speed above 1,000 rpm with theaccelerator pedal, then slowly release the pedal.
11-252
eFORWARD -
Three Way Catalytic Converter
(TWCI
Doscription
The Three Way Catalytic Converter (TWC) is used toconven hydrocarbons (HC), carbon monoxide (CO), andoxides of nitrogen (NOx) in the exhaust gas to carbondioxide (COr), dinitrogen (N,) and water vapor.
D15Y5, D16
, engine:
'99 - 00 D16Y8, 81642 engine:
ENGINE SIDE
t

Transmission Assembly
Removal (cont'dl
8. Remove the driveshafts (see section 161.
NOTE: Coat all the precision finished surfaces with
clean engine oil or grease. Tie plastic bags over the
driveshaft ends,
DRIVESHAFT
10 x 1.25 mrn43 N.m 14.4 kgt.m,32 rbf.frl
COTTER PINReplace. SELF12 x 1.25 mm49-59 N.m (5.0 -6.0 kgt.m,36-43 lbf.ft)
9. Remove exhaust pipe A.
Replace.12 x 1.25 mm64 N.m {6.5 kgt.m,47 lbf.tr)
GASKETSReplace.
IF\sELF-LocKtNG NUT.''1/Replace.8 x 1.25 mm16 N.m {1.6 kgf'm,12 tbf.ft)
EXHAUSTPIPE A
SELF-LOCKING NUTReplace.I x 1.25 mm22 N.m (2.2 kgf.m,16 tbt'fr)
SELF-LOCKING NUTReplace.D16Y5, D16Y7 engines:
33 N.m {3.4 kgf.m,25 lbt.ft)D16YB engine:10 x 1.25 mm54 N.m 15.5 kgl'm,40 lbf.ttl
SET RING
13-6
v'10. Remove the shift rod and extension rod.
SI'IIFT BOD
8x22mmSPRING PINReplace.
EXTENSION ROD
PIN PUNCH, 8.O mm(Commercially available)f-
'1'1. Remove the engine stiffeners and clutch cover.
D16Y5, D16Y8 engines:
10 x 1.25 mm44 N.m (4.5 kgt.m,33 tbf.tr)
I x 1.25 mm24 N.m (2.4 kgf.m17 lbt.frl
COVER
8 x 1.25 mm24 N.m 12.4 kgf'tn,17 tbt.tr)

Description
The automatic transmission is a 3-element torque converter and a dual-shaft electronically controlled unit which provides
4 soeeds forward and 1 reverse.
Torque Convertel, Geats, and Clutches
The torque converter consists of a pump, turbine and stator, assembled in a single unit. They are connected to the engine
crankshaft so they turn together as a unit as the engine turns. Around the outside of the torque converter is a ring gear
which meshes with the starter pinion when the engine is being started. The entire torque converter assembly seryes as a
flywheel while transmiuing power to the transmission mainshaft.
The transmission has two parallel shafts: the mainshaft and the countershaft. The mainshaft is in Iine with the engine
crankshaft. The mainshaft includes the 1st, 2nd and 4th clutches, gears tor 2nd, 4th, reverse and lst (3rd gear is integral
with the mainshaft, while the reverse gear is integral with the 4th gear). The countershaft includes the 3rd clutch, and
gears for 3rd,2nd, 4th, reverse. 1st and park. The gears on the mainshaft are in constant mesh with those on the counter-
shaft. When certain combinations of gears in transmission are engaged by clutches. power is transmitted from the main-
shaft to the countershaft to provide E, ld, E, and E positions.
Electronic Control
The electronic control svstem consists of the Powertrain Control Module {PCM), sensors, a linear solenoid and four
solenojd valves. Shifting and lock-up are electronically controlled for comtonable driving under all conditions. The PCM is
located below the dashboard, under the front lower panel on the passenger's side
Hydraulic Control
The valve bodies include the main vatve body, the secondary valve body, the regulator valve body, the servo body and the
lock-up valve body through the respective separator plates, They are bolted on the torque converter housang
The main valve body contains the manual valve, the 1-2 shift valve. the 2nd orifice control valve, the CPB {Clutch Pressure
Back-up) valve, the modulator valve. the servo control valve, the relief valve, and ATF pump gears The secondary valve
body contains the 2-3 shift valve. the 3-4 shift valve, the 3-4 orifice control valve, the 4th exhaust valve and the CPC (Clutch
pressure Control) valve. The regulator valve body contains the pressure regulator valve, the torque converter check valve,
the cooler relief valve, and the lock-up control valve. The servo body contains the servo valve which is integrated with the
reverse shift fork, and the accumulators. The lock-up valve body contains the lock-up shift valve and the lock-up timing
valve. The linear solenoid and the shift control solenoid valve Ay'B are bolted on the outside of the transmission housing,
and the lock-up control solenoid valve Ay'B is bolted on the outside of the torque converter housing. Fluid from regulator
passes through the manual valve to the various control valves. The clutches receive fluid from their respective teed pipes
or internal hydraulic circuit.
Shift Control Mechanism
Input from various sensors located throughout the car determines which shift control solenoid valve the PCM will activate
Activating a shift control solenoid valve changes modulator pressure, causing a shift valve to move. This pressurizes a line
to one of the clutches, engaging that clutch and its corresponding gear, The shift control solenoid valves A and B are con-
trolled by the PCM.
Lock-up Mechanism
In ,Dt1 position, in 3rd and 4th. and in E position in 3rd, pressurized fluid is drained from the back of the torque converter
through a fluid passage, causing the lock-up piston to be held against the torque converter cover. As this takes place, the
mainshaft rotates at the same as the engine crankshaft. Together with hydraulic control, the PCM optimizes the timing of
the lock-up mechanism. The lock-up valves control the range of lock-up according to lock-up control solenoid valves A and
B, and linear solenoid. When lock-up control solenoid valves A and B activate, the modulator pressure changes The lock-
up control solenoid valves A and B and the linear solenoid are controlled by the PCM.
(cont'd)
14-3

Transmission
Removal(cont'd)
'10. Remove the cotter pins and castle nuts, th€n separatethe balljoints from the lower arms (see section 1gl.
DAMPER PINCH BOLT
NUT
FORI(FORK BOLT
11. Remove the right damper fork bolt. th€nright damper fork and dampor.
COTTER PINReplace.
separate
12.
1a
14.
Pry the right and left driveshafts out ofthe differential.
Pull on the inboard joint to remove the right and leftdrivsshafts (see section 16).
Tie plastic bags over the driveshaft onds.
NOTE: Coat all precision finished surfaces with cleanengine oil.
Remove the exhaust pipe A,
NOTE: Dl6YB engine is shown; D16y7 engine issimilar.
t9.
SELF-LOCKING NUTReplace.
L
14-124
EXHAUST PIPE AMOUNT/BRACKET
17.
18.
16. Remove the shift cable cover. then remove the shiftcable by removing the control lever,
CAUTION: Take car6 not to bond the shift cable.
Remove the right front mounvbracket.
Remove the ATF cooler hoses at the ATF coolerlines. Tufn the ends of the ATF cooler hoses uo toprevent ATF from flowing out, then plug the ATFcooler hosgs and lines.
NOTE: Check for any sign of leakage at the hoseioints.
WASHER

Transmission
Installation (cont'dl
9. Attach the torque converter to the drive plate witheight drive plate bolts and torque as follows:Rotate the crankshaft pulley as necessary to tightenthe bolts to 1/2 of the specified torque. then to thefinal torque, in a crisscross pattern.
After tightening the last bolt, check that the crank-shaft rotates freely.
TOROUE: 12 N.m {1.2 kgl.m, 8.7 tbt{r}
10 x 1.25 mm
6x1.0mm12 N.m (1.2 kgt m,8.7 rbt ft)
I 1.25 mm2/t N.m {2.4 kg{.m,17 tbt ftlCONVERTEB
10. Install the torque convener cover and the €nginestiffener.'11. Tighten the crsnkshaft pull€y bolt, if necessary (see
section 61.
12. Connect the ATF cooler hoses to the ATF cooler lines(see page 1,t192).
ATF COOIIRUNE
10 x 1.25 mma,l N.m {4.5 kgl.m,33 rbt.fttRIGHT FRONT 12 x 1.25 mmMOUNT/BRACKET 6.t N.m (6.5 kg{.m,47 tbt ftl
13. Install the right front mounvbracket.
4,r N.m 14.5 kgf.m,33 lbtft)
COVER
L,
14-1A4
SHIFT CABLE
SHIFT CAAE COVER
14. Install the control lever with a new lock washer tothe control shaft, then install the shift cable cover.
CAUION: Taks care not to bend the shift cable.
L(rcK WASHERReplace.
8 x 1,25 r'|m22N-m12.2 tgt m. 16lbnftl
x 1.0 mmtit N.m 11.4 kgt m,10 tbr,ft,
15. lnstall the exhaust pipe A.
NOTE: D16Y8 engine is shown; D16y/ engine is sim_ilar.
Replace.
GASKETReplace.
SELF.LOCKING NUTReplace.10 x 1.25 mm54 N.m (5.5 lgf.m,40 tbt ftl
NUTSELF.LOCKING NUTReplace.8 x 1.25 mm22 N.m {2.2 kgl.m, 16lbtfrl
Replace.8 x 1.25 mm16 N.m {1.6 kgI.m,12 tbf.ft)

Transmission
Removal (cont'd)
10. Remove the cotte. pins and castle nuts, then separatethe ball joints from the lower arm (see section 1g).
SELF-LOCKING -=V,
NUT \Replace. oitupea rOax
Remove the right damper fork bolt, then separateright damper fork and damper.
Pry the right and left driveshafts out of the differen-tial.
Pull on the inboard joint to remove the right and leftdriveshafts (see section 16).
Tie plastic bags over the driveshaft ends.
NOTE: Coat all precision finished surfaces with cleanengine oil.
Remove the exhaust pipe A.
/\<,\CASTLE I{UT COTTERReplac6.
't 1.
't2.
tJ.
14.
q.
SELF.LOCKINGNUTReplace.
SELF.LOCKING NUTReplace.
14-306
EXHAUST PIPE A
19.
'16, Remove the right front mounvbracket,
ATF COOLER HOSE
17. Remove the ATF cooler hoses at the ATF coolerlines. Turn the ends of the ATF cooler hoses uo toprevent CVT fluid from flowing out, then plug theATF cooler hoses and lines,
NOTE: Check for any sign of leakage at the hosejoints.
18. Remove the engine stiffeners and the flywheel cover.
Remove the eight drive plate bolts one at time whilerotating the crankshaft pullev.
ENGINE STIFFENER

l.
9. Install the remaining transmission housing mount-
ing bolts.
PRIMARY OXYGEN SENSOR
Remove the transmission jack and the hoist. then
remove the hoist bracket from the engine'
Attach the flvwheel to the drive plate with eight
bolts and torque as follows:
Rotate the crankshaft pulley as necessary to tighten
rhe bolts to half of the specified torque, then to the
final torque, in a crisscross pattern.
After tightening the last bolt. check that the
crankshaft rotates freelY.
10.
11.
12. Install the flywheel cover and the engine stiffeners
DRIVE
6xl.0mm12 N.m
- l12 kgf'm'rE 8.7 tbf.ftl
ENGINESTIFfENEB10 x 1.25 mmart N.m la.s kgt.m,33 tbtftt
8 x 1.25 mm24 N.m(2.1 kgf'm,17 tbt.ftt
DRIVE PI.ATE BOLT
6x1.0x14mm12 N.m {1.2 kgt m.
8.7 lbf,ftl8 x 1.25 mm26 N.m
12.7 kqfin,20 rbt'ftlFLYUTHEEL
ENGINE STIFFENER
8 x 1.25 mm10 x 1.25 mmr,a N.m {4,5 kgf m,
33 tbf.ftl
TRANSMISSION HOUSING
MOUNNNG BOLT
6il N.m {6.5 kgf.m, 47 lbf'ftl
24 N.m (2.4 kgt'm, '17 lbf'ftl
22 N.m t2.2 kgl m, 16lbf'ftl
14-349
13.
14.
Tighten the crankshaft pulley bolt, if necessary (see
section 6).
Connect the ATF cooler hoses to the ATF cooler lines
(see page 14-357).
CAUTION: Whilo connecting the ATF cooltr hGes,
b€ sure not lo allow dust and other loreign parti-
cles to entg. into the transmission.
15. Installthe right front mounvbracket'
10 x 1.25 mm
a,r N.m {4.5 kgf'm,33 lbt ftl
RIGHT FRONTMOUNT/BRACKET
ATF COOLER LINE
10 x 1 .25 mm54 N.m {5.5 kgt'm,
4{) tbl.ftt
ATF COOI,TR HOSE
16. Installthe exhaust PiPe A.
EXHAUST PIPE A
GASKETReplace.
@
\SELF.LOCKING NUTReplace.10 x 1.25 mm5/a N.m {5.5 kgt m,irc lbf.ft)
(cont'dl
*s$o
oor*rr-@Replace.
SELF.LOCKINGReplace.8 x 1.25 mmSELF.LOCKING NUT
Replace.8 x 1.25 mm16 N.m {1.6 kgl'm,12 tbl.ftt