1998 HONDA CR-V ABS sensor

Front Suspension
Knuckle/Hub Replacement (cont'dl
1.Loosen the wheel nuts slightly.
Raise the front of the vehicle, and make sure it is
secu.ely supported.
Remove the wheel nuts and wheel.
SPINDLE NUT24 x 1,5 mm245 N.m (25.0 kgf.m, 181 lbtft)Replace.
Raise the locking tab on the spindle nut, then remove
the nut.
Remove the brake hose mounting bolts.
BRAKE HOSE MOUNTING BOLT8 x 1.25 mm22 N.m {2.2 kgt m, 16 lbtft)
CALIPER MOUNTING BOLTS12 x 1.25 mm108 N.m (11.0 kgl.m, 80 lbl.ft)
Remove the caliper mounting bolts, and hang the
caliper assembly to ona side. To prevent damagg to
the caliper assembly or brake hose, use a shortpiece of wire to hang the caliper from the undercar-
riage.
18-10
7. Remove the 6 mm brake disc retaining screws,
6 mm BRAKE DISCRETAINING SCREWS9.8 N.m(1.0 kgl.m,7.2 lbf.ftl
8.
8 x 1.25 mm BOLTS
Screw two 8 x 1.25 mm bolts into the disc to push it
awav from the hub. Turn each bolt two turns at a
time to prevent cocking the disc excessively,
Remove the brake disc from the knuckle.
Check the front hub for damage and cracks.
11. Remove the wheel sensor from the knuckle (for
vehicles with ABS). Do not disconnect the wheel
sensor connector.
9.8 N.m(1.0 kgf.m,7.2 tbttrl
MOUNTINGBOLTS9.8 N.mlr.0 kgf.m, ?.2lbf.ftl
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Raise the rear of the vehicle, and make sure it is
securely supponed.
Remove the rear wheel.
Remove the brake drum from the hub by threading
8 x,r.25 mm bolts into the drum to push it away
from the hub bearing unit. Turn each bolt two turns
at a time to prevent cocking the drum excessively.
SPINDLE NUTWHEEL NUT
r81 N.m t18.5 kgt m, 134 lbt'ftl 12 x 1.5 mm
Replace. 108 N m 111.0 kgf'm, 80 lbf ftl
't.
4.
8 x 1.25 mm BOLTS
i+/3 /',1
"@,1 /
.'--7 J-->-
5.
6.
Raise the locking tab on the spindle nut, then
remove the nut.
Remove the brake shoes.
Remove the parking brake cable from the backing
plate using a 12 mm offset wrench as shown.
BACKING PLATE
PARKING ARAKE CABLE
1a-21
7.
6.
Disconnect the brake line from the wheel cylinder.
Remove the wheel sensor from the backing plate
(for vehicles with ABS). Do not disconnect the
wheel sensor connector.
Remove the 12 mm flange bolts.
PULLERlCommercially available)
4WD; Remove the backing plate/hub bearing unit
from the rear axle with a puller if necessary.
Separate the rear hub from the hub bearing unit
using the specialtools and a press.
Note the following items during disassembly:
. Take care not to distort the backing plate.
. Hold on to the hub to keep it from falling when
a
10.
11.
DRIVER ATTACHMENT,37 x ilo mm07746 - 0010200
(cont'd)
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Anti-lock Brake System (ABSI,'97 - 00 Models
Special Tools ............. 19-26
Component Locations ......................... 19-27
Anti-lock Brake System (ABS)
Features/Construction ............. ......, 19-2A
Circuit Diagram ......... 19-32
ABS Control Unit Terminal
Arrangement ......... 19-34
Troubleshooting Precautions ............. 19-36
Diagnostic Trouble Gode (DTC)
Diagnostic Trouble Code (DTC)
Indication (SCS Model ................ 19-38
DTG Erasure (MES Mode) ............... 19-39
Troubleshooting lndex .................... 19-40
Troubleshooting
ABS Indicator Light Does Not
Come On ............ 19-41
ABS Indicator Light Does Not
Go Off (No DTC) ........................... 19-43
DTC 1r - 18:
Wheel Sensor .... 19-45
DTC 31 - 38:
Solenoid ............. 19-47
DTC 51 - 53:
ABS Pump Motor ......................... 19-49
DTC 54:
Main Relay ......... 19-52
DTC 61:
lgnition Voltage ........................... 19-54
DTC 81:
Central Processing Unit (CPU) .... 19-55
Modulator Unit
Removal/lnstallation ....................... 19-56
ABS Control Unit
Replacement ..,...... 19-57
Pulsers/Wheel Sensors
Inspection .............. 19-57
Wheel Sensor Replacement ............ 19-58
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Component Locations
NOTE: The illustrations show the '97 - 98 models. The '99 - 00 models are similar.
ABS CONTROL UNITRIGHT-REAR WHEEL SENSOR
UNDER.HOOD ABSFUSE/RELAY BOX
RIGHT.FRONT WHEELSENSOR CONNECTOR
RIGHT-FRONTWHEEL SENSORRIGHT-REAB WHEELSENSOR CONNECTOR
MODULATOR UNIT
LEFT.FRONT WHEEL SENSOB
UNDER.DASH FUSE,/RELAY 8OX
UNDER.HOOO FUSE/RELAY AOX
IGl I(, AI FUSE
ABS +B 120 Al FUSEPUMP MOTOR ('II AI FUSE
HOBN/STOP I15 AI FUSE
UNDER.HOOD ABS FUSE/RELAY BOX
LEFT.FRONT WHEELSENSOE CONNECTOR
GAUGE ASSEMBLY
ABS INDICATOR
UNDER-DASH FUSE/NELAY BOX
METER {7.5 AI FUSE
MOTOR RELAY
19-27
SERVICE CHECK CONNECTOR {2PI
D!
trtrtr
[r D!
ABS {7.5 AI FUSEMTR CHECK 17.5 AI FUSE
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ABS 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 it 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 intensi{ying modes.
Self-diagnosis Function
The ABS control unit is equipped with a main cPU and a sub cPU, that check each other for problems.
The CPUs check the circuit of the system.
When the CPUS detect failure, they shift to the "system down mode" or the "control inhibition mode".
The self-diagnosis can be classitied into these four categories:
O: Initial diagnosis
O: Except ABS control
O; During ABS control
@: During warning
On-board Diagnosis Function
The ABS system 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
PGIM Tester. See the Honda PGM Tester user's manuals for specific operating instructions.
(cont'd)
19-29
ABS CONTROL I-INIT
MODEABSINDICATOR LIGHTMAIN
RE LAY
SOLENOID
VALVERestan conditionDTC
SYSTEM
DOWNONNo
operatron
Drive
inhibitionOperation*rlgnition
switchOFF - oN (ll)Memory
CONTROL
INHIBITIONONNo
operaton
Drive
inhibitionOperationAutomaticlVemory
*1: Except CPU failure
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Wheel Sensor
The wheel sensors are the magnetic contactless type. As the gear pulser teeth rotate past the wheel sensor's magnetic
coil, AC current is generated. The AC frequency changes in accordance with the wheel speed. The ABS control unit detects
the wheel sensor signal frequency and thereby detects the wheel speed
at LOW SPEED
wheel Sp€od and Modulatot Control
VEHICLE SPEED
VEHICLE SPEED
WHEEL SPEED
PRESSU
OUTLETVALVE ON
OFF
INLETVALVE ON
OFF
MOTOR
ON
OFF
When the wheel speed drops sharply below the vehicle speed, the outlet valve opens momentarily to reduce the caliper
fluid pressure. The pump motor starts at this time. As the wheel speed is restored. the inlet valve opens momentarily to
increase the caliDer fluid oressure.
F
GEAR PULSER
19-31
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ABS CONTROL I.]NII {NBK)
Gil
SEFVCE CHEC(STOP
-[rf$-n*'"[m;] t
ra
G2t
rlr*r"t_._*hr;c, ------ r"-!cc
-
Pf:-tL
t=
#
J*tt-
-
55
V-
,ln l'? g,l,BFN+BsN-,| Br(--o-.8:
Y G101cr02
WIT/BLIJ
,r-,,..J A ^ l0lTA L M|; i trr cor'hrEcroF 'r6P)
8LK
4c1013,402
tG2,
Lffi-
_-- -.^ PMR,
t!94
.,._ PCOM,
9
GRN/8I(x
,,-:gLTpliirn
Ilcrom.:C, IRE^R4iq!AGFNmL---l
BLr( -l
eli -.1
BtK-L,-ry
ABs coNTRoL uNrr 26p coNNEcroR 9E-FY!!(o;fib;;; -- coNNF
e -rlr z :ltl,/ a ,18 e tol/ 12li3l I'
| | 4 1 5 16)17 V I1s V l2' VIIU)4 p91ffi
ABS coNTRoL uNrr 22p coNNEcroR QAIA.Li-;;i,;;) -- coNNE
T
t,*---;T- =l------5o ril mtTlI r, / , | #l,'2 -14 i7 19 -)1 .221 | | ,z
Wire side of lemale terminals
)E CHECK:CTOR (2P)
,f
'97
FRO
TermmateINKcroR (16P)
?'--"r""""-./ 6 ,/ 8\
F{ c7
HEEL SENSOR CONNECTOR
model '98-99 models
NT/ REAR FRONTI RIG-HT-REAR
iTtl /J r lz !\
nal side ol Terminal side olterminals male terminals
LEFT.REAR/nf'\1./ 1F
r .4-;1V L:JTerminal side ollemale terminals
19-33
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ABS Control Unit Terminal Arrangement
ABS CONTROL UNIT 26P CONNECTOR
Wire side of female terminals
TeiminalnumbelWiiecolorTerminal3ignTeiminalnamglDescription
Voltrge
tdminalsCondhions(lgnition Switch ON llll)Output voltago
1GRNn/VHTPCOM(Primary
common)
Power source for the solenoidvalve and pump motor.1-GNDON6
ONOV
OFFAC:3-6V
2BLI(WHTSCOM(Secondary
common)
Power source for the solenoid2-GNDOFF
lConnect the SCS seNice] connector IApprox.3 V
BLVBLU(lgnition 2)Detects ignition switch 2signal. (System activate signal)3-GNDBattery Voltage
4BLUA/ELRRO(Rear-right 0)Detocts right-rear wheelsensor srgnat.When the wheel isturned at 1 turn/second.
53 mV or above ondigitaltester (ACrange) {Beference)150 mvtrp or aboveon oscilloscope
GRYRLO(Rear-left 0)Detects left-rear wheel sensorsrgnat.6-19
8GRNFRO(Fronr-right 0)Detects right-front wheelsensor signal.8-21StopsApprox.2.5 VSTOP
{Stop)Detects bfake switch signal.(Prevents unnecessary ABS operation)9-GNDBrake pedal pressed.Battery Voltage
Brake Dedal released.OV
10BRN^/VHTFLO(Front-left 0)
Detects left-front wheel sensorsrgnal.
10-23
When the wheel isturned at 1 turn/second.
53 mV or above ondigitaltester lACrange) (Reference)
150 mvpp or aboveon oscilloscope
StopsADprox. 2.5 V
YELRL-oUT(Rearleft outlet)
Drives left-rear outlet solenoid12.GNDONONOV
OFFAC:3-6V
13RED^/vHTRR.IN(Rear-right
inlet)
Drives right-rear inlet solenoid13.GNDOFF
lConnect the SCS service\ connector IApprox. 3 V
14WHT/GRNB1(Baftery 1)Power source for the solenoidvalve and pump motor.14.GND
Every timeBattery Voltage82(Battery 2)Power source for the solenoidvalve and pump motor.15-GND
16BLKGND2(Ground 2)Ground for the ABS controlunit.16-GNDBelow 0.3 V
't7GRN/YELRR1(Rear-right 1)Detects right-rear wheelsensor signal.'t7 -4
When the wheel is turnedat l turn/second,
53 mV or aboveon digitaltester(AC range)(Reference) 150mVp-p or aboveon oscilloscope
19LT BLURL1(Rearieft 1)Detects left-rear wheel sensorsignal.19-6
GRN/BLKFR1(Front-right 1)Detects right-front wheelsensor srgnat.21-8
23GBN/ORNFL1{Front-left 1}Detects left-front wheel sensorsagnal.23-10StopsApprox. 2.5 V
REDRLI N(Rear-left inlet)
Drives left-rear inlet solenoid
25,GND
ON
=
-9ONOV
AC:3-6V
OFF
/Connect the SCS service] conneclor IApprox. 3 V
26BLKGND3(Gtound 3)Ground tor the ABS controluntI.26-GNDBelow 0.3 V
19-34
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