1999 HONDA CIVIC Brake

IJBrake Switch Signal ('99 - 00 Models except Dl6Y5 engine with M/Tl
This signals the ECM/PCM when the brake pedal is depressed
I
lnsoection ot Brake Switch signal.
Are the brake lights on without
depressing the brake Pedal?
Depress the brake Pedal
Inspect the HoRN {15 A} fuse in
the underhood fuse/ relay box'Do the brake lights come on?
- R.pair short in the wiro be'
tween the brake switch and
the HORN (15 Alfuse.- Replac€ the HORN (15 A) tuse.
- Repair open in the wite be'
tween the brako switch and
the HORN (15 Alfuse.- lnsoect the brake switch (3ec
section tgl.
Check fot an oPen in the wire
{BKsw linel:
1. Depress the brake Pedal.2. Measure vohage beween ECM/
PCM connector terminals A32
and 820 with the brake Pedaldepressed.
Bepair open in the wire between
the ECM/PCM (A32) and the
brake switch.
Brake switch signal i5 OK
ECM/PCM CONNECTORS
BKSW (GRN/WHTI
LG1 {BRN/BLK)
Wire side o{ female terminals

ldle Control System
ldle Speed Setting
Inspection/Adiustmenl
'96, '97 Dl6Y5. '96 - 00 Dl5Y8 sngine with M/T
NOTE:
. Before setting the idle speed, check the following
items:- The MIL has not been reported on.- lgnition timing- Spark plugs- Air cleaner- PCV system
o (Canada) Pull the parking brake lever up. Start the
engine, then check that the headlights are off.
1. Start the engine. Hold the engine at 3.000 rpm withno load (taansmission in neutral) until the radiatorfan comes on, then let it idle.
2. Connect a tachometer.
3. Disconnect the IAC valve connector.
4.lf the engine stalls, restart the engine with the accel-
erator pedal slightly depressed. Stabilize the rpm at1,000, then slowly release the pedal until the engineidles.
Check idling in no-load conditionsr headlights. blowerfan. rear defogger, radiator fan, and air conditioner
are not operating.
ldle spsed should be:
450 1 50 rpm
11-220
Adjust the idle speed, if necessary, by removing thecap and turning the idle adjusting screw.
NOTE; After adjusting the idle speed in this step,recheck the ignition timing (see section 23).
lf it is out of spec, go back to step 4.
IDLE
6. Turn the ignition switch OFF.
7. Reconnect the 2P connector on the IAC valve, then
do the ECM reset procedure.
8. Restart and idle the engine with no-load conditionsfor one minute, then check the idle speed.
NOTE: (Canada) Pull the parking brake lever up.Start the engine, then check that the headlights areoff.
ldle sp€sd should b€:
670 i 50 rpm IUSA)750 t 50 rpm {Canada}
9. ldle the engine tor one minute with headlights {Low)ON. and check the idle speed.
ldle speed should be:
750 :r 50 rpm
10. Turn the headlights off. ldle the engine for oneminute with heater fan switch at Hl and air conditioneron, then check the idle speed.
ldle speed should be:
810150 rpm
NOTE: lf the idle speed is not within specification,see Symptom Chan on page 11-84.

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

\
\
(From page 11-284)
\(cont'd)
11-285
EVAP PURGE CONTROL SOI.INOID
VALVE 2P CONNECTOR IC114I
Wire side otfemaleterminals
?,
I,l,lil?"",,,u
EL,TWYEL)
Check the EVAP pirrge controlsolenoid valvei1. Disconnect the 2P connector
lrom the EVAP purge control
solenoid valve.
2. Ouickly raise the engine speed
to 3,000 rpm.
ls there vacuum?
InsDect vacuum ho56 routing.ll OK, replace the EVAP Purgecontrol solenoid valve.
Chock for a short in the wire(PCS linel:1. Turn the ignition switch OFF
2. Disconnect ECM/PCM connec'
tor A (32Pi.
3. Check for continuity between
the EVAP PUrge control sole
noid valve 2P connector termi
nal No.2 and body ground.
Check the vacuum when hot:
1. Turn the ignition switch OFF
2. Block the rear wheels and set
the parking brake.3. Jack up the front o{ the vehi-
cle and support it with safety
stands,4. Start the engine. Hold the
engine al 3,000 rpm wlth no
load (in Park or neutral) until
the radiator fan comes on, then
let it idle.5, Check for vacuum at the vac-
uum hose with transmissaonin gear (A/T in B Position,M/T in lst gear) after starting
the engrne.6. Ouickly raise the engine speed
to 3,000 rpm.
Reoair short in the wire botween
the EVAP purg€ cor|t]ol solenoid
valve and the ECM/pcM lA15l.ls there continuity?
Substitute a known-good ECM/
PCM and recheck. lf sYmPtom/indication goes eway. repl.c€ the
original ECM/PCM.
Check the EVAP Purg€ control
solenoid valve:1. Turn the ignition switch OFF
2. Disconnect the 2P connector
from the EVAP Purge control
solenoid valve and warm lt
up to normal operating tem_perature again if necessary
3. Stan the engine.4. At the harness side, measure
voltage between the EVAP
Purge control solenoid valve
2P connector terminal No. 1
and No. 2 with the transmission in gear (A,/T in E Posi-tion, M/T in 1st gear).
In3pect vacuum ho3€ touting.
ll OK, replace EVAP Purge con-
lrol aolenoid vtlv€.
Check lo. an open in the wire
llGl linel:At the harness side, measure volt
age between the EVAP Purge con-
trol solenoid valve 2P connectorterminal No. 1 and body groundRepeir open in tho wire between
EVAP purge conttol solenoid valv€
and the No. 15 ALTERNATOR SP
SENSOR (7.5 A fu3e
IBLK/YELI
lTo page 11 286i(To page 11-286)

Emission Control System
Ch€ck the EVAP purge controlsolenoid valv6:1. Disconnect the 2P connectorfrom the EVAP purge controlsolenoid valve.2. Ouickly raise the engine speedto 3,000 rpm.
Insped vacuum hose routing.lf OK. roplace the EVAP purge
control solonoid valve.
Chock tor r short in the wir€
{PCS line):1. Turn the ignition switch OFF.2. Disconnect ECM/PCM connec-tor A (32P).
3- Check tor continuity betweenthe EVAP purge control sole-noid valve 2P connector termi-nal No. 2 and body ground.
Check the vacuum when hot:1. Turn the ignition switch OFF.2. Block the rear wheels and setthe parking brake.3. Jack up the lront of the vehi-cle and support it with safetystands.4. Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutrali until
the radiator fan comes on, thenlet it idle.5. Check for vacuum at the vac-uum hose with transmissionin gear (A/T in E position,
lvl/T in 1st gear) after startingthe engine.6. Ouickly raise the engine speedto 3,000 rpm.
Rooair shoft in the wire belwegnthe EVAP pulg6 control solenoidvalvs and tho ECM/PCM {A61.ls there continuity?
Substitute a known-good ECM/PCM and rech6ck. lt 3ymptom/indicrtion 90e3 rway, r6plac6 th€o.iginal ECM/FCM.
Check th€ EVAP purge controlsolenoid valve:1. Turn the;gnition switch OFF.2. Disconnect the 2P connectorfrom the EVAP purge controlsolenoid valve and warm itup to normal operating tem-perature again if necessary.3. Start the engine.4- At the harness side, measurevoltage between the EVAPpurge control solenoid valve2P connector terminal No. 1and No.2 with the transmis-sion in gear {A/T in E posi-tion, M/T in lst geari.
In3pect vacuum hoae routing.lf OK, repl.ce EVAP purge con-trol solonoid valve.ls there battery voltage?
Chock for an open in the wire(lG1 lina):At the harnoss side, measure volt-age beNveen the EVAP purge con-trol solenoid valve 2P connectorterminal No. 1 and body ground.
Repair open in the wire b€lwe€nEVAP purge contrl 3olenoid valv6and lhe No. 15 ALTERNATOR SPSENSOR 17.5 A, fu3e.
ls there battery voltage?
Evaporative Emission (EVAPI Controls (cont'dl
(From page 11-289)
(To page 11-291)
11-290
IJ
EVAP PURGE CONTROL SOLENOIDVALVE 2P CONNECTOR IC114I
PCS
IRED/YEL)
temaletermrnars
of
PCS(RED/YEL)
tGlIBLK/YEL)
{To page 11 291)

Glutch Master Gylinder
IRemovaUlnstallation
CAU'NON:
. Do not sDill brake lluid onthevehicle;it may damage
the paint; if brake fluid does contact the paint, wash
it off immediatelY with water.
. Plug the end ofthe clutch line and reservoir hos€ with
a shop towelto prevent brake tluid from coming out
1. The brake tluid can be removed from the clutch
master cylinder reservoir with a syringe
2. Disconnect the clutch line and reservoir hose from
the clutch master cylinder.
19N.m 11.9 kgf.m,14 tbf.ttl
[.
3. Pry out the lock pin, and pull the pedal pin out
the yoke. Remove the nuts
NUTS8 x 1 .25 mm13 N.m {'1.3 kgt.m,9.4lbf ft)
)
of
CLUTCH LINE
iffi,
4. Remove the clutch master cylinder.
CLUTCH MASTER CYLINDER
lnstall the clutch master cylinder in the reverse
order of removal.
NOTE: Bleed the clutch hydraulic system {see page
12-61,
12-5

Slave Gylinder
Removal/lnstallation
CAUTION:
. Do not spill brake tluid on the vehicle; it may damage
the paint; if brake fluid does contact th€ paint, wash
it off immodiatoly with water,
. Plug the end ot the clutch line with a shop towel to
prevsnt brake fluid from coming oul.
-61'srp", High Temp Urea crease (p/N
08798 - 90021.
: Brake Assembly Lube or equivalent rubber
grease.
1. Disconnect the clutch line from the slave cvlinder.
2. Remove the slave cylinder from the clutch housing.
12-6
3. Install the slave cylinder in the reverse order of
removal.
NOTE: Make sure the boot is installed on the slave
cvlinder.. CLUTCH LINE15 N.m (1 .5 kgf.m, 1 1 lbf.It)
SLAVE CYLINDER
-G4(P/N 08798- 90021
8 x 1.25 mm22 N.m 12.2 kgl.n,16 lbl.lt)
:^..:i!!!!! :l
(Brak€ AssemblyLubol
Bleed the clutch hydraulic system.
a Attach a hose to the bleeder screw, and suspend
the hose in a container of brake fluid.
. Make sure there is an adequate supply of fluid at
the clutch master cylinder, then slowly pump the
clutch pedal until no more bubbles appear at the
bleeder hose.
. Refill the clutch master cylinder with fluid when
done.
. Always use Genuine Honda DOT 3 Brake Fluid.
Using a non-Honda brake fluid can cause corro-
sion and decrease the life of the system.
. Confirm clutch operation, and check for leaking
flu id.

Transmission Assembly
I
Removal
@. Make sure iacks and safety stands are placed prop€dy,
and hoist brackets are atlach€d to correct position on
the enginc.
. Apply parking brake and block rear whosls so car will
nol roll olf stands and lall on you while working under
it.
CAUTION: Use fender covers to svoid damaging painted
surfaces.
1. Disconnect the negative {-) cable first, then the pos-
itive (+) cable from the battery'
Drain transmission oil {see page 13-3).
Remove the intake air tube. intake air duct and air
cleaner housing assembly (see section 5).
Disconnect the starter motor cables, transmission
ground wire and back-up light switch connector.
6x1.0 mm BACK-UP LIGHT
9.8 N.m (1.0 ksf.m, 7.2 lbI.ft) swlTcH CoNNECTOR
8x 1 .25 mm8.8 N.m {0.9 kgt.m,6.5 lbf.ftl
\
ARTER
5. Remove the wire harness clamps.
vssCONNECTOR
6. Disconnect the vehicle speed sensor (VSS) connec-
ror.
Remove the clutch line bracket, clutch line clamp,
and slave cvlinder.
CAUTION:
. Do not opsr.te tho clutdh pedal once the 3lavc
cylindor has b6on romoved.
. Tske care not to bend tha clutch lin6.
7.
(cont'd)
13-5