2003 HONDA CIVIC valve

EVAP System
FuelTank Vapor ControlValve Test (cont'd)
7. Connect a second vacuum pump to the fuel tankvapor signaltube (A).
8. Apply vacuum (1 pump) to the fuel tank vaporsignal tube (A). then check the vacuum on thepump in step 6.
. lf the vacuum holds, replace the fueltank vapor
control valve {see page 11-189).. If the vacuum is released, goto step 9.
11-188
10.
Fill the fuel tank with fuel, then check for fuel in theEVAP two way valve (A), and fuel tank vaporrecirculation hose (B).
NOTE: At either location, tiny droplets of fuel arenormal.
. lf fuel runs out of th e hoses at either location,
replace the fuel tank vapor control valve..lfthefuel does not run out of the hoses, the fuel
tank vapor system function is normal.
Disconnect the fuel tank vapor quick disconnectfrom the EVAP canister, then plug lhe port on the
canister. Reapply vacuum (80 pumps).
. lf the vacuum holds, replace the fuel tank control
valve (see page 1 1-189).. lf the vacuum does not hold, insDect the EVAP
canister vent shut valve o-ring. lf the o-ring is OK,replace the EVAP canister, and repeat step 4.
Check for fuel rirnning out.
Check for fuel running out.

EVAP Canister Replacement
l. Remove the vacuum hoses (A).
2. Remove the boit (B).
3. Remove the EVAP canister (C).
4. Install in the reverse order of removal.
Fuel Tank Vapor Control Valve
Replacement
1. Remove the fuel tank(seepagell-155).
2. Remove the fueltank vapor control valve(A) from
the fuel tank (B).
Install the fuel tank vapor control valve.
Install the fuel tank (see page 1 'l -155).
3.
4,
11-189

EPS Components
Steering Gearbox Removal (cont'd)
Disconnect the EPS wire harness 6P connector (A),
and remove the EPS wire harness (B) and mountino
bracket (C).
12.
Remove the ground cable terminal (A) from the
steering gearbox housing.
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b-H\
ry T,-.lt'^ \
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13.
_-1..1.-'
-a--zii F--_1
17-52
14. Remove the engine wire harness clamps {A)fromthe three mounting brackets.
Remove the heater hose {B) from the bracket.
Open the heater valve cable clamp (A), and
disconnect the heater valve cable (B). Remove theheater valve (C) from the bulkhead, and move jt
aside.
t5.
16.
I

EPS Components
Steering Gearbox Installation (cont'd)
7. Installthe body stiffener (A), and torque the
mounting bolts to the specified torque.
8 x 1.25 mm29 N.m {3.0 kgf.m,22lbf.ftl
LInstall the heater valve (A) on the bulkhead, and
connect the heater valve cable end (B) to the heater
valve arm (C). Readjust the heater valve cable {seepage 21-46).
9.8 N.m(1.0 kgf m,7.2 tbf.ftl
L-t ,:.i.t'
17-64
9. Reinstall the heater hose (A) on the hose bracket.
Install the engine wire harness clamps (B) to the
three harness brackets.
Under the steering gearbox, install the ground
cable terminal (A) on the steering gearbox housing.
10.
'I t.
9.8 N.m{1.0 kgf.m, 7.2lbf.ft)

Gonventional Brake Components
IBrake Booster Test
Functional Test
1. With the engine stopped, press the brake pedal
several times to deplete the vacuum reservoir, thenpress the pedal hard, and hold itfor 15 seconds. lfthe pedal sinks, either the master cylinder is
bypassing internally, or the brake system (master
cylinder, lines. modulator, or calipers) is leaking.
2. Start the engine with the brake pedal pressed. lf thepedal sinks slightly, the vacuum booster is workingproperly. lf the pedal height does not vary, thebooster or check valve is faulty.
3. With the engine running, press the brake pedal
lightly. lfthe brake pedal sinks more than 1O mm
{3/8 in, ) in 3 minutes, the master cylinder is faulty.A slight change in pedal height when the Ay'C
compressor cycles on and off is normal. (The A,/C
compressor load changes the vacuum available tothe booster.)
Leak Test
1. Press the brake pedal with the engine running, thenstop the engine. lf the pedal height does not vary
while pressed for 30 seconds, the vacuum boosteris OK. lf the pedal rises, the booster is faulty.
2. With the engine stopped, press the brake pedal
several times using normal pressure. When thepedal is first pressed, it should oe row.
On consecutive applications, the pedal height
should gradually rise. lfthe pedal position does notvarv, check the booster check valve.
19-18
3. Disconnect the brake booster vacuum hose (check
valve built-in) (A) at the booster side.
5.
4.Start the engine, and let it idle. There should bevacuum available. lf no vacuum is available, thecheck valve is not working properly. Repiace thebrake booster vacuum hose and check valve, andrelesI.
Reconnect the brake booster vacuum nose.
Start the engine, and then pinch the brake boostervacuum hose between the check valve and thebooster,
Turn the ignition switch OFF, and wait 30 seconds,Press the brake pedal several times using normalpressu re,
When the pedal is first pressed, it should be low.On consecutive applications, the pedal height
should gradually rise.
. lf the pedal position does notvary, replacethe
brake booster.. lf the pedal position varies, replace the brake
booster vacuum hose/check valve assembly.

Conventional Brake Components
{Brake Hoses and Lines Inspection
1. Inspect the brake hosesfordamage, deterioration, leaks, interference, andtwisting.
2. Check the brake lines for damage, rusting. and leakage. Also check for bent brake lines.
3. Check for leaks at hose and line joints or connections, and retighten if necessary.
4. Check the master cylinder and ABS modulator unit for damage and leakage.
NOTE: Replace the brake hose clip whenever the brake hose is serviced.
15 N.m (1.5 kgf.m, 11 lbf.ftl
ABS MODULATOR UNIT-Io-BRAKE LINE15 N.m {1.5 kgf m.11 lbf.ftl
BRAKE HOSE-to-CALIPERlBANJO BOLTI3il N.m {3.5 kgf.m.25 lbt'ft)BLEEO SCREW9 N.m {0.9 kgf.m,7 lbf.ftl
MASTER CYLINDEB-to-BRAKE LINE15 N m {1.5 kgt.m, ll lbf.ft)
CONTROL VALVE-to-
L
BRAKE HOSE.tO-CALIPER{BANJO BOLTI34 N.m {3.5 kgf.m, 25 lbl.ft)BLEED SCBEW9 N.m10.9 kgf.m, 7 lbf ft)
BRAKE LINE15 N.m 11.5 kgf m, 11 lbf.ft)
BRAKE LINE-Io-BRAKE HOSE15 N.m (1.5 kgf.m,11lbf.ftl
BRAKE LINE-to-BRAKE HOSE
t''/,i'i'
,/ ,l
t t,.. -)
19-24

Terminal
number
Wire
color
TerminalsignDescriptionMeasurement
TerminalsConditions {lgnition
switch oN lll))
Voltage
14WHT/
BLK
STOPDetects brake
switch siqnal
I4-G NDBrake pedalPressedEattery
voltaoeReleased
t5BLV
ORN
rG2Power source for
activating the
svstem
15-GNDBaftery
voltage
16BLKM-GNDGround for the
0umD motor
16-GN DBelow 0.3 V
WHT/
RED
+ B-MRPower source for
the oumD motor
17-GNDAt alltimesBattery
voltaoe
18WHT/
GRN
+ B-FSRPower source for
the valve relav
,18-GNDAt alltimesBattery
voltaoe'19BLKGNDGround for the
modulator
assemDtv
19.GNDBelow 0.3 V
20B LU/
RED
ABSDrives ABS
indicator
20-GNDABS
indicator
ONAbout 11 V
OFFBelow 1 V
BRN/
YEL
EBD(Electronic brake
distribution)
Drives brake
system indicator
21-GNDBrake system
indicator
OFFBelow 0.3 V
ON for
bulb
cnecK
8attery
voltage
(cont'd )
19-37

ABS Control Unit
Main Control
The ABS control unit detects the wheel speed based on the wheel sensor signal it received, then it calculates the
vehicle speed based on the detected wheel speed. The control unit detects the vehicle speed during deceleration
based on the rate of deceleration.
The ABS control unit calculates the slip rate of each wheel and transmits the control signal to the modulator unit
solenoid valve when the slip rate is high.
The pressure reduction control has three modes: pressure reducing, pressure retaining, and pressure intensifying.
Self-diagnosis Function
1. TheABScontrol unitisequippedwithamainCPUandasub-CPU.EachCPUcheckstheotherforproblems.
2. The CPUS check the circuit of the system.
3. TheABScontrol unitturns ontheABS ind icator when the unitdetectsa problem andthe unit stops th e system.
4. The self-diagnosis can be classified into these two categories:. lnitial diagnosis. Regular diagnosis
On-board Diagnosis Function
The ABS can be diagnosed with the Honda PGM Tester.
The ALB Checker cannot be used with this system. For air bleeding and checking wheel sensor signals. use the Honda
PGM Tester. See the Honda PGM Tester user's manual for specific operating instructions.
(cont'd)
T---
19-39