2003 HONDA CIVIC Rear

ABS Gomponents
System Description (cont'd)
Features
When the brake pedal is pressed during driving, the wheels can lock before the vehicle comes to a stop. In such an
event. the maneuverability of the vehicle is reduced if the front wheels are locked, and the stability of the vehicle is
reduced if the rear wheels are locked, creating an extremely unstable condition. The ABS precisely controls the slip
rate of the wheels to ensure maximum grip force from the tires, thereby ensuring the maneuverability and stability of
the vehicle.
The ABS calculates the slip rate of the wheels based on the vehicle speed and the wheel speed, then it controls the
brake fluid pressure to reach the target slip rate.
Grip Force of Tire and Road Surface
TARGET SLIP RATE
COEFFICIENT OFFRICTION
SLIP RATE
19-38

ABS Components
q,
CONNECTOR A {12P)BRAKE PEDAL POSITIONSWITCH 4P CONNECTOR
Circuit Diagram (cont'd)
UNDER-HOOD FUSE/RELAY BOX CONNECTORSCONNECTOR A {12P) CONNECTOR B {2P}
UNDER.DASH FUSE/RELAY BOX CONNECTORSCONNECTOR I {5P)CONNECTOR K I17P)MULTIPLEX CONTROLUNIT 13P CONNECTOR
CONNECTOR B I22PI
1l2l3l,/15
GAUGE ASSEMBLY CONNECTORS
CONNECTOR A I22P)
WHEEL SENSOR 2P CONNECTORS
FRONT
J --T:-l Ltqtt/)l'l L_.:-:J r\-r-----Tr'e:l
RIGHT.REAR LEFT-REAR
tslTt?t /J 1T-1\I tL | rlziJ
Terminal side of male lerminals
ABS CONTROL UNIT 3IP CONNECTOR
OATA LINK CONNECTOR {16P)
Terminal side of female terminals
Wire side of female terminals
1234567
810111213141511
123,/ ,/
67891011n213
1245678I11121415
161118192021/1,/1,/vl,/l
/t,/t/t,/t/
19-44

\
DTC Troubleshooting
DTC 11, 13, 15, 17: Wheel Sensor
(Open/Short to Body Ground/Short to Power)
1. Disconnect the ABS control unit 31P connector.
2. Sta rt the engine.
3. Measure the voltage between the appropriate
wheel sensor (*)circuitterminal of theABS
control unit 31P connector and body ground (see
table).
DTCADpropriate Terminal
11 (Rioht-front)No.5: FRS (t)
13 (Left-front)No, 7: FLS (*)
15 {Riqht-rear}No. 2: RRS (*)
17 (Left-rear)No.9 RtS (f )
ABS CONTROL UNIT 31P CONNECTOR
FRS {+IIGNR/BLK} FLS I+I (BLU
RRS {+)(GNR/YEL)
Wire side of female terminals
ls thete battery voltage?
YES Repair short to power in the (+) circuit wire
between the ABS modulator-control unit and the
appropriate wheel sensor. I
NO Go to step 4.
4. Turn the ignition switch OFF.
5. Check for continuity between the appropriate
wheel sensor (+ ) circuit terminal and body ground
{see table).
DTCAppropriate Terminal
11 (Riqht-front)No. 5: FRS (+)
13 (Left-front)No. 7: FLS (*)
15 (Rioht-rear)No.2: RRS (*)
17 (Left-rear)No.9 RLS (+l
ABS CONTROL UNIT 31P CONNECTOR
Wire side
ls there continuity?
YES Go to step 6.
NO-Go to step 7.
Disconnect the harness 2P connector from the
appropriate wheel sensor, then check for continuity
between the 1+)and ( )terminals ofthe harness
and body ground.
ls there continuity?
YES-Repair shortto body ground in the (+)or { )
circuit wire between the ABS modulator-control
unit and the wheel sensor.l
NO Repiace the wheel sensor.l
(cont'd)
Wire side of female terminals
19-45

ABS Components
DTC Troubleshooting (cont'dl
7. Check the resistance between the appropriate
wheel sensor (+) and ( ) circuit terminals {seeta ble).
DTCAppropriate Terminal
l+) Side*lSide
11 {Riqht-front)No.5: FRS (*)No.4:FRS 1-)'13 {Left-front)No. 7: FLS {+iNo.6: FLS (-
15 (Rioht-rear)No. 2: RBS {+)No. 1:RBS (-)
17 (Left-rear)No.9: RLS 1-No.8: BLS (-
ABS CONTROL UNIT 31P CONNECTOR
Wire side of female terminals
Is the rcsistance between 450 2,000 A ?
YES Check for a loose ABS control unit3lP
connector. lf necessary. substitute a known-good
ABS modulator-control unit, and recheck.l
NO Go to step 8.
Disconnect the harness 2P connector from theappropriate wheel sensor, and check the resistance
between the (+) and { )terminalsof thewheel
sensor.
ls the resistance between 450- 2,000 Q ?
YES-Repair open in the (+) or (-) circuit wire, orshort between the (+) circuit wire and the { )circuit wire between the ABS modulator-control
unit and the wheel sensor.l
NO Replace the wheel sensor.l
19-46
DTC12,14, 16, 18: Wheel Sensor Putse
Signal
NOTE: lf the ABS indicator comes on for the reasonsdescribed below, the indicator goes off when you test-drive the vehicle at 31 mph (50 km/nl.
. Only the drive wheel rotated. The vehicle spun. Electrical noise
1. Visually check for appropriate wheel sensorandpulser installation and condition (see table).
DTCAppropriate Wheel Sensor
12Riqht-front
14Left-front
Riqht-rear
18Left-rear
Ate they installed correctly and not damaged?
YES-Go to step 2,
NO Reinstall or replace the appropriate wheelsensor or pulser,I
Disconnect the ABS control unit 31P connector.
Measure the resistance between the appropriate
wheel sensor ( f) and ( ) circuit terminals (see
table).
ls therc less than 450 Q ?
YES Go to step 1.
NO-Go to step 4.
\\|D
2.
3.
DTCAppropriate Terminal
l*) Side) Side
12 {Rioht-front)No.5:FBS (*No.4:FBS
14 (Left-front)No.7;FLS l*No,6:FLS
16 (Riqht.rear)No.2: RRS (*No. 1:BRS
18 (Left-readNo.9: BLS 1-No.8:RLS

Wheel Sensor Inspection
1.
2.
Inspect the front and rear pulsers for chipped or
damaged teeth.
Measure the air gap between the wheel sensor and
the pulser all the way around while rotating the
pulser. Remove the rear brake disc to measure the
gap on the rear wheel sensor. lf the gap exceeds
1.0 mm (0.04 in.), check for a bent suspension arm.
Standard:
Front; 0.4- 1.0 mm (0.02-0.04 in.)
Rear: 0.2 1.0 mm (0.01 0.04 in.l
Front:
0.4 '1.0 mm10.02 0.0'l in.l
I
t
Bear:
0.2 1.0 mm{0.01 0.04 in.}
Wheel Sensor Replacement
NOTE: Inslall the sensors carefully to avoid twisting the
wtres.
Front:
6 mm BOLT9.8 N.m{1.0 kgf.m,7.2lbf.ftl
6 mm BOLT9.8 N.m{1.0 kgf.m,7.2 lbf.ftl
Rear:
6 mm BOLT9.8 N.m11.0 kgf.m,7.2 lbf.ft)
WHEEL SENSOR
6 mm BOLT9.8 N.m(1.0 kgf'm,7.2 rbr.ft)
19-59

Body
DoorsComponent Location Index ...........Door Panel Removal/lnstallation .....,..........Door Outer Handle ReplacementDoor Latch ReplacementDoor Glass and RegulatorReplacementDoor Sash Trim Replacement .......................
Door Glass Outer WeatherstripReplacement
Door Weatherstrip Beplacement
Door Glass Adjustment .................................Door Position Adjustment .............................Door Striker Adiustment ................................MirrorsComponent Location Index ...........................Power Mirror Replacement ...........................Mirror Holder Replacement ...........................Rearview Mirror Rep1acement ......................
GlassComponent Location Index ...........................Windshield Replacement
Bear Window Rep1acement ...........................
Ouarter Glass Replacement ..........................MoonroofComponent Location Index ...........................Symptom Troubleshooting Index
Glass Height Adjustment ...............................
Glass ReplacementWind Def lector 8ep1acement ........................Drain Channel Rep1acement ..........................Sunshade Replacement .................................Motor ReplacementFrame and Drain Tube Replacement ............Drain Channel Slider and Cable AssemblyReplacementLimit Switch Adjustment ...............................Closino Force and ODenina Draq Check ......lnterioi TrimComponent Location Index ...........................Trim Removal/lnstallation DoorArea ..........Trim Removal/lnstallation-Rear Side AreaTrim Removal/lnstallation-Cargo Floor AreaTrim Removal/lnstallation-Hatch Area .........Headliner Removal/lnstallation* Carpet Rep1acement .......................................ConsolesConsoles, Front and RearRemova l/lnsta llationFront Console Disassembly/Reassembly .....
20-220,420-620-7
20-920 t0
20- 10
20-1120-1120-1220 13
20-1420-1520-1520-16
20 1120-1920-2520-29
20,3520-3620-3720-3120-3820 3920-4020-4120,42
20 4420-4620,44
20-4920 50
20-51
DashboardInstrument Panel Removal/lnstallation ........Driver's Dashboard Lower CoverRemovat InstallationDriver's Dashboard Under CoverRemova t Insta llation
Oriver's Pocket Removal/lnstallation ............Shift Lever Trim Removal/lnstallation ..........Center Panel Removal/lnstallation ...............Passenger's Dashboard Lower CoverRemova l/lnsta llat ionx Glove Box Removal/lnstallationDashboard Side VentRemoval/lnstallation .................................. 20-64Beverage Holder Removal/lnstallation ........ 20-64Driver'sTray Removal/lnstallation ............... 20-65Passenger's Tray Removal/lnstallation ........ 20 65* Dashboard Removal/lnstallation .................. 20-66Steerinq Hanqer Beam Reolacement ........... 20-68Seats "
Component Location Index ........................... 20-10* Front Seat Removal/lnstallation ................... 20-11* Front Seat Disassembly/Reassembly-Driver's .................................. 20-73* Front Seat Disassembly/Reassembly-Passenger's ........................... 20-74* Front Seat Cover Replacement ..................... 2O-75Rear Seat Removal/1nsta11ation ..................... 20-80Rear Seat-back Latch Replacement .............. 20-81Rear Seat-backStriker Replacement ............ 20-81
20-59
20-59
Rear Seat-back Cover Replacement ............. 20-82Rear Seat Cushion Cover Replacement ....... 20.84BumpersFront Bumper Removal/lnstallation .............Rear Bumoer Removal/lnstallation ...............HoodAdjustmentHood Seal ReplacementHood Insulator Rep1acement .........................Hatch
20-6020,6020 6120-62
20-63
20-63
20,8520-86
20-4720,8820,89
20-5220-5320-5420-55
20-5720-58
Adjustment ................... 20-90Hatch Suppon Strut Replacement ................ 20-91Hatch WeatherstriD Reo1acement ................. 20-92
Fuel Fill DoorAdiustment ................... 20-93Exterior TrimFront Grille Replacement ..............Cowl Covers Replac"rn""t .. . .....................A pillar Corner Trim Replacement ................Roof lMolding Replacement ...........................Rear License Trim ReplacementHatch Spoiler 8ep1acement ...........................Emblem Rep1acement .........................
20-9420-9520-9620-9720,9820-9920-100

FenderwellFront Inner Fender ReplacementFront Fender Fairing Replacement ...............Fuel Pipe Protector ReplacementRear Air Outlet Rep1acement .........................OpenersComponent Location Index ...........................Hood Opener Cable Replacement ................* Fuel Fill Door Opener CableReplacement
Hood Latch Rep1acement ..............................Fuel Fill Door Opener Replacement ..............Hatch Handle Replacement ...........................Hatch Latch Replacement ..............................Hatch Lock Cylinder Replacement ................FrameSubf rame Replacement ................................. 20-112Frame Stiffener, Brace, and GussetReplacement ............. 20-113r Fremp RFnrir Chrrr ................ 20-114
20-10220-10320-10420-'to4
20-10520-106
20 107
20-10820-10920-1 1020-11020-111

Doors
Door Panel Removal/lnstallation
SpecialTools Required
Trim pad remover, Snap-on A 177A or equivalent,
commercially available.
NOTE: When prying with a flat-tip screwdriver, wrap it
with protective tape, and apply protective tape around
the related parts. to prevent damage.
1 . Remove the mirror mount cover (see page 20-15).
2. Insert a hex wrench through the hole (A) in the door
grip base (B), Push the door grip cover (C) out to
release the hook (D) and tab (E), and pull out the
cover to release the tabs (F) and hook (G) by hand,
then remove the cover.
20-4
3. Remove the armrest cover (A). Take care not to
scratch the door panel.
-1 Pry out the front edge of the cover to release
the hooks (B).
-2 Pry out the bottom and rear edge of the cover
to release the hooks (C).
-3 Pry out along the top to release the tabs (D).
Remove the screws (A, B), and release the tabs (C),
then remove the door grip base (D). Remove the
screw (A) securing the door panel from the armrest
portion.
Fastgngr Locations
A> : Screw,3 B > : Screw,5
4.