1998 HONDA CIVIC Tacho

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

Stall Speed
Test
CAUTION:
. To prev€nt transmission damage, do not t6st stall speed for more than ro sgconds at a time.. Do not shift the levor while raising the engine speed.. Bo sule lo remove the pressure gauge betoro testing stall speed.
'1. Engage the parking brake, and block the front wheels.
2. Connect a tachometer to the engine, and start the engine.
3. Make sure the Ay'C switch is OFF.
4. After the engine has warmed up to normal operating temperature (the radiator fan comes on). shift into E position.
5. Fully depress the brake pedal and accelerator for 6 to g seconds, and note engine speed.
6. Allow two minutes for cooling, then repeat the test in @ and @ positions.
NOTE:
. Stall speed tests should be used for diagnostic purposes only,. Stall speed should be the same in o., E and E positions.
Stall Spsed RPM:
Specification: 2.700 rpm
Service Limit: 2,550 - 2,850 rDm
TROUBLEPROBABLE CAUSE
. Low fluid level or ATF pump outDur. Clogged ATF strainer. Pressure regulator valve sluck closeo. Slipping clutch
. Slippage of 4th ctutch
. Slippage of 2nd clutch
. Slippage of lst clut"tr or. t"t g""io*-*"y "lut"h
Stall rpm high in D., E and E positions
Stall rpm high in El position
Stall rpm high in E posirion
Stall rpm high in E position
Stall rpm low in LDa . El and E positrons. Engine output low. Torque converter one-way clutch slipping
14-116

Pressure Testing
@I While testing, be caroful of th€ rotating front wheels.
. Make sure lifts, iacks, and satoty stands are placod properly (see section 1)'
CAUTION:
. Beforo iesting, be sure the transmission fluid is tilled to tho proper level'
. Warm up tho engine before testing'
1. Raise the vehicle (see section 1).
2. Warm up the engine, then stop the engine and connect a tachometer'
3. Connect the oil pressure gauges to each inspection hole.
TOROUE: 18 N.m (1.8 kgf'm, 13 lbnft)
cAUTloN: connact the oil pressuro gauges securely; be suro not to allow dust and other foreign Parlicles to entel
the inspestion holos'
A/T OIL PRESSURE GAUGESET w/PANEL07t06 - 0020400
A/T LOW PRESSURE GAUGE
SET WPANEL07406 - 0070300
A/T OIL PRESSURE HOSEADAPTER07Mru - PY0120(4 requiJedl
A/T OIL PBESSURE HOSE
2210 mmOTMAJ - PY4{)llA
14 roquircdl
Start the engine, and measure the respective ptessure as follows'
a Line Pressure
. 1st Clutch Pressure
. 2nd,3rd and 4th Clutch Pressure
Install a new washer and the sealing bolt in the inspection hole. and tighten to the specified torque'
TOROUE: l8 N.m (1.8 kgf'm,13lbf'ft)
NOTE: Do not reuse old sealing washers; always replace washers'
(cont'd)
14-119

Stall Speed
Test
CAUTION:
. To prevent transmission damage, do not test stall sp€€d for mole than 10 seconds at a time.
. Do not shift the lsver whils raising the engine speod.
. Be sure lo remove the pressure gauge before tosting stall speed.
. Stall speed tssts should be used tor diagnostic purposes only,
1. Engage the parking brake, and block the tront wheels.
2. Connect a tachometer to the engine, and stan the engine.
3. Make sure the A/C switch is OFF.
4. After the engine has warmed up to normal operating temperature (the radiator fan comes on), shift into E position.
5. Fully depress the brake pedal and accelerator for 6 to 8 seconds, and note engine speed,
6. Allow two minutes for cooling, then repeat the test in E, E, and E positions.
Stall Speed BPM in E poshion:
Specification: 2,500 rpm
Servic€ Limit: 2,350 - 2.650 rpm
Stall Speed RPM in E, E and E positions:
Specitication: 3,000 rpm
Service Limit: 2,800 - 3,100 rpm
TROUBLEPROBABLE CAUSE
Stall rpm high in @. p. [, and @ positionsLow fluid level or ATF pump output
Clogged ATF strain€r
PH regulator valve stuck closed
Slippage of forward clutch
Faulty start clutch
Stall rpm high in E position. Slippage of reverse brake. Faulty start clutch
Stall rpm low in E, P, [, and @ positionsEngine output low
Faulty stan clutch
Stuck shift valve
14-294

Pressure Testing
. While testing, be careful of the rot8ling front wheels.
. M8k6 suro lifts, iacks, and satety stands are placed properly lsee section 11.
CAUTION:
. Before testing, be sur. the transmb3ion fluid is fillod to the propor lcvel.. Warm up the engin€ to nolmal operating tsmperature bofore testing. While t€sting, be 3ure not to allow dust and other loreign particles to onler into the transmi$ion.
1. Raise the front of the vehicle, and support it with safety stands (see section 1).
2. Set the parking brake. and block both rear wheels securely.
3. Allow the front wheels to rotate freely.
4. Warm up the engine (the radiator fan comes on), then stop arid connect a tachometer.
5. Connect the special tool to each inspection hole.
TOROUE: 18 N.m (1.8 kgt'm, 13 tbtfr)
GAUTION:
. Connect the oil pressuro gauge !!€curoly, bs sur6 not to allow dust and other foroign particlG3 to ontar the inspsc-tion hole.
. Whon troubleshooting by tho E indicltor light indic.t6 a problam. you mu3t u3e an oil p.essure gluge that moa,sures 4,9(X) kPa (a.90 MPa,50.0 kS cr*,771psi) or more when molsuring driv. pulley pressure and driven pullcypre33ure.
NOTE:
. D.ive pulley pressure may be above 3,430 kPa (3.i8 MPa,35.0 kgf/cmr, 498 psi) wh€n there is a transmission prob-
lem that causes the TCM or PCM to go into the fail-safe mode,. Use a commercially available oil pressure gauge that measures 4,900 kPa {4.90 MPa, 5O.O kgf/cmr, 711 psi) ormore, and the Ay'T Oil Pressure Hose, 2210 mm (07MAJ - PY4011A).
FORWARD CLUTCH PRESSUREINSPECTION
lMarked with "F")
REVERSE BRAKE PRESSUREINSPECTION I.IOLE
A/T OIL PRESSUREGAUGESET W/PANEL0ta{r6 - oO2Oi|(Xt
A/T LOW PRESSUREGAUGE W/PANEL0706 - qt7o:t{ro
DRIVE PULLEY PRESSUREINSPECTION HOI.E(Marked with "DR")
A/T PRESSURE HOSEADAPTER07MAJ - PYar'120lil R.qulr.d)
A/T PRESSUBE HOSE2210 mm07MAJ - PYitollAla R.quir.d)
(
INSPECNON HOLE(Marked with "SC")
CLUICH PRESSURE
INSPECTION HOLE(Marked with "LUB")
DRIVEN PULLEY PRESSUREINSPECTION HOLElMarked with "DN")
14-300
ATF DIPSTICK

Steering Column
Inspection
NOTE: The tilt steering column type is shown; the con-
ventional steering column is similar except for the tilt
mechantsm.
Check the steering column ball bearing and the steer-ing joint bearings for play and proper movement. lf
there is noise or if there is excessive play, replace the
steering column as an assembly.
Check the retaining collar for damage. lf it is dam-
aged, replace the retaining collar.
Check the absorbing plates, absorbing plate
and sliding capsules for distonion or breakage.
Replace the steering column as an assembly
are distorted or broken.
COLUMN BALL
ABSORBING PLATE GUIDES
guides
if they
SLIDING
BEARINGS
TILT LOCK BOLTTighten the lock bolt withthe tilt lever raised.
This part is attachodto the column bracketwith the plastic injections.
1.Move the tilt lever from the loose position to lockposition 3 to 5 times; then measure the tilt leverpreload l0 mm {0.4 in) from the end ofthe tilt lever.
Preload: 70 - 90 N (7 - 9 kgf. 15 - 20 lbf)
lf the measurement is out of the specification,
adjust the pfeload using the following procedures.
a. Loosen the tilt lever, and set the steering column
in the neutral position.
b. Remove the 6 mm lock bolt and remove the stop.
c. Adjust the preload by turning the tilt lock bolt left
or flgnr.
d. Pull up the tilt lever to the uppermost position and
install the stop. Check the preload again. lf the
measurement is still out of specification, repeat
the above procedures "a" through "c" to adjust.
CAUTION: Be caretul not to loosen tho tilt lever
when installing the stop or tightening the 6 mm
lock bolt.
17 3a
10 mm (0.4 inl
9.8 N.m (1.0 kgl.m,7 lbf.ft)

Connector ldentification and Wire Harness Routing
Main Wire Harness lLeft side ot engine compartment branchl
Connector or
Terminal
Number of
CavitiesLocationConnects toNotes
c301
c302
c303
c304
c305
c305
c306
c307
c308
c309
c309
c310
5
2
10
3
14
8
1
I
10
2
2
Left side of engine compartment
Left side of engine compartment
Left side of engine companment
Left side of engine compartment
Left side of engine compartment
Left side of engine compartment
Left side ot engine companment
Left side of engine companment
Left side of engine compartment
Left side of engine companment
Left side of engine companment
Left side of engine companment
Windsh ield wiper motor
Test tachometer connector
Engine wire harness (C101)
Daytime running lights resistor
Engine wire harness (C136)
Engine wire harness (C136)
Brake fluid level switch (+)
Brake fluid level switch (-)
Engine compartment wire harness (C201)
Engine companment wire harness (C202)
Engine compartment wire harness (C202)
Left front ABS wheel sensor
Canada
;|.'
ABS*lr D'16Y5 engine *5:'96 9g models*2: D16Y8 engine*3: With cruise control*4r Without cruise control
*1: '99 - 00 models
Main Wire Harness (Right side of engine compartment branch)
Connector or
Terminal
Number of
CavitiesLocationConnects toNotes
c353
c354
c355
c356
c357
c359
c360
11
3
I
3
2
2'10
2
2
Right side of engine compartment
Right side of engine companment
Right side of engine companment
Right side of engine compartment
Right side of engine compartment
Right side of engine companment
Right side of engine compartment
Right side of engine compartmentRight side of engine compartment
Right side of engine compartment
Right side of engine compartment
Under-hood fuse/relay box (CgoB)
Under-hood fuse/relay box (C906)
Underhood fuse/retay box (C905)
Under-hood tuse/relay box (C907)
Engine companment wire harness {C214)Under-hood ABS fuse/relay box {C927)Under-hood ABS fuse/retay box (C926)
Right front ABS wheel sensor
ABS solenoid
ABS pump motor
EVAP control canister vent shut valve
USA
ABS
ABS
ABS
ABS
ABS
G403Right side of engine compartmentBody ground, via main wire harness
23-30

-Starter Test
NOTE; The air temoerature must be between 59 and
100'F (15 and 38"C) before testing.
Recommended Procedure:
. Use a staner system tester.
. Connect and operate the equipment in accordance
with the manufacturer's instructions.
. Test and troubleshoot as described,
Alternate Procedurg:
. Use the following equipment:- Ammeter, 0 - 400 A
- Voltmeter, 0 - 20 V (accurate within 0.1 volt)
- Tachometer, 0 - 1,200 rpm
. Hook up a voltmeter and ammeter as shown.
NEGATIVETERMINAL
NOTE: After this test, or any subsequent repair. reset
the ECM/PCM to clear any codes (see section l1)
Check the Start€r Engagemont:
1. Remove the No. 44 (15 A) fuse from the under-hood
fuse/relay box,
2. Turn the ignition switch to START (llll with the shift
lever in E or E position (rVT) or with the clutch pedal
depressed {M/T). The starter should crank the engine.
. lf the starter does not crank the engine, go to
step 3.
. lf itcranksthe engineerraticallyortooslowly, go
to "Check for Wear and Damage" on the next
page.
Check the battery. battery positive cable, ground,
starter cut relay, and the wire connections for loose-
ness and corrosion, Test again.
lf the starter still does not crank the engine, go to
step 4,
Unplug the connector (BLK,/WHT wire and solenoid
terminal) from the starter,
Connect a jumper wire from the battery positive (+)
terminal to the solenoid terminal.
The starter should crank the engine.
. lf the starter still does not crank the engine,
remove it, and diagnose its internal problem
. lf the startercranksthe engine, goto step 6.
Check the ignition switch (see page 23-891.
Check the starter cut relay and clutch interlock switch
(see page 23-86,87).
Check the A/f gear position switch (see page 23-154).
Check for an open in the wire between the ignition
switch and starter.
7.
(cont'd)
23-95
9.