1998 ACURA INTEGRA sensor

L
I
Rear Damper
Removal
Remove the rear wheels (see page 18-30).
Remove the damper access panel.
- Sedan only: Remove the trunk side panel (see
section 20).
Remove the two flange nuts.
Hatchback:
DAMPER ACCESS PANEL
10 x'1.25 mm
Remove the wheel sensor wire brackets (for vehicles
with ABS).
NOTE: Do not disconnect the wheel sensor connec-
tor.
18-36
5.Remove the flange bolt on the damper.
Remove the flange bolt that connects the lower arm
to the trailing arm.
7. Lower the rear suspension and remove the damper.
DAMPER
\

Rear Damper
Lower the rear suspension and position the damper
with the welded nut pointed toward the front of the
vehicle.
DAMPER
2. Loosely install the two flange nuts.
Hatchback:Sedan:
lnstallation
. ',.?7,:..r9\,ir '..
EY
FLANGE NUTS10 x 1.25 mmTighten these nuts in step 7 on the next page.
18-40
3. Install the wheel sensor wire bracket.
NOTE: Be careful when installing the sensors to
avoid twisting wires.
Raise the rear suspension with a floor iack until the
vehicle just lifts off the safety stand.
@ The floor jack must be securely posi-
tionod or personal iniury may result.
5. Install the damper mounting bolt and the flange
bolt, then tighten the bolts.
NOTE: The damper mounting bolt and the flange
bolt should be tightened with the damper under
vehicle load.
FLANGE EOLT10 x 1.25 m.n54 N.m (5.5 kgf m, 40 lbt.ftl
FLANGE BOLT10 x 1-25 mm54 N.m ls.s kgf m, 40 lbtft)
6. Tighten the three wheel sensor wire bracket bolts
{for vehicles with ABS).
9.8 N.m {1.0 kg{.m, 7.2 lbtftlBOLTS

Anti-lock Brake System {ABS}
Speciaf Tools ............... 19-24
Component Locations,...........,..,........... 19-25
Anti-lock Brake System (ABSI
Features/Construction ....................... 19-2G
Circuit Diagram ........... 19-30
ABS Control Unit Terminal
Arrangement ........... 19-32
Troubleshooting Precautions ................ 1g-35
Diagnostic Trouble Code (DTC)
DTC Indication (SCS Mode) ............... t9-37
DTC Erasure {MES Mode) .................. 19-38
b Troubleshooting Index ...................... 19-39- Troubleshooting
ABS Indicator Does Not
Come On .............. 19-40
ABS Indicator Does Not
Go Off .............. ..... 19-42
DTC 11, 13, 15. 17:
Wheel Sensor (Open/Short to Body
Ground/Short to Power) ............... l9-44
DTC 12. 14, 16, 18:
Wheel Sensor (Electrical Noise/
Intermittent Interruption) ..........,.. 19-45
DTC21 -24:
Pulser ...,.......... ..... 19-46
DTC 31 - 38:
Solenoid .............. 19-47
DTC 41 - 44:
Wheel Lock .......... 19-50
DTC 51:
Motor Lock .......... 19-51
DTC 52:
Motor Stuck OFF ...................,........ 19-52
DTC 53:
Motor Stuck ON ............................. 19-55
DTC 54:
Fail-safe Relay ................................ t9-57
DTC 61.62:
lgnition Voltage ............................. 19-59
DTC 71:
Different Diameter Tire .................. 1 9-60
DTC 81:
Gentral Processing
Unit {CPU} ............ 19-60
Modulator Unit
Bemoval/lnstallation ......................... 19-61
ABS Control Unit
Replacement ............ 19-62
Pulsers/Wheel Sensors
Inspection ................ 19-62
Wheel Sensors
Replacement .,.......... 19-63

Gomponent Locations
,)
ABS CONTROL UNIT
UNDER.HOOD FUSE/RELAYRGHT-NEAR WHEELsEillioRaoxLEFT.REAR WHEEI-SENSOR
UNDER-H(X)D ABS
MODULATOR UNIT
FAIL-SAFE RELAY
RIGHT-FRONT WHEELSENSOR
LEFT-FROl{T WHEELSENSOR
UNDER.HOOD FUSE/RELAY BOX
ABS INDICATOR
UNDER.HOOD ABS FUSE/RELAY 8OX
ABS 81 {20 AI FUSEAAS MOTOR {40 Al FUS€
AAS PUMP MOTOR RELAY
GAUGE ASSEMBLY
!D
Dtrt]
HORN/STOP I2O A) FUSE
A8S UNIT {10 AI FUSERR DEF FI-Y I7.5 AI FUSE
19-25

IABS Control
The ABS control unit detects the wheel speed based on the wheel sensor signal it received, then it calculates the vehiclespeed based on the detected wheel speed. The control unit detects the vehicle speed during deceleration based on therate of deceleration.
The ABS control unit calculates the slip rate of each wheel, and it transmits the control signal to the modulator unitsolenoid valve when the slip rate is high.
The pressure reduction control has three-modes: pressure reduction, pressure retaining, and pressure intensifying.
Self-diagnosis Function
The CPUS in the ABS control unit check the circuit of the system.
The self-diagnosis can be classifield into two categories.. Initial diagnosis: Performed right after the engine starts and until the ABS indicator gose off.. Regular diagnosis: Performed right after the initial diagnosis until the ignition switch isturnedoff.
On-board Diagnosis Function
The ABS control unit is connected to the data link connector fi6p).The ABS system can be diagnosed with the Honda PGM Tester.
(cont'd)
19-27

Wheel Speed and Modulator Control
OUTLETVALVE oN
OFF
INLETVALVE ON
OFF
MOTOR
ON
OFF
When the wheel speed drops sharply below the vehicle speed, the inlet valve closes to retain the caliper fluid pressure.
When the wheel speed drops further, 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 caliper fluid pressure.
Wheel Sensor
The four 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 signalfrequency and thereby detects the wheel speed.
rr LOW SPEED
5
GEAR PUTSER
19-29

ABS Gontrol Unit Terminal Arrangement
ABS CONTROL UN]T 22P CONNECTOR
Wire side oI female t6rminals
Terminal
numbel
Wire
Golor
Terminsl sign
{Terminal
namet
Description
Measurgmgnt
TerminalConditions
{lgnition swhch ON {ll}}Voltage
1BLK/WHTGND3(Ground 3)
Ground1.GNDBelow 0.3 V
4GRN/REDPARK
{Parking)
Detects parking brake
switch signal4-GNDParking
brake
PulledBelow 0.3 V
Battery voltage
LT GRN/
BLK
FLW (-)
{FronLleft
wheel negative)
Detects left-front wheel
sensor srgnal
0.053 V or
above
0sci\oscope:
0.15 Vp-p or
above
7GBN/ORN
FLW (+)
(Front-left
wheel positive)- | Turn wheel at
E
1 turntsecona
l'GRN
FRW (-)
(Front-right
wheel negative)
Detects right-f ront wheel
sensor slgnal
8-9
1 FR\N (+)
I \GRN/BLK (Front-right
I I wheelpositiveStops0.25 - 1.15 V
10GRN/WHTSTOPDetects brake switch signal1O.GNDBrake pedalDepressedBaftery voltage
ReleasedBelow 0.3 V
11BLK/TELtG2
(lgnition 2)
Power source for activating
the system11-GNDlgnition
switch
oN {I)Battery voltage
Start (lll)Below 0.3 V
19-32

Terminal
numbel
Wire
color
Terminalsign
lTerminal
name,
Description
Measurement
T€rminalConditions(lgnition switch ON {ll}}Vohage
BLKMHTGND4(Ground 4)
G round12-GNDBelow 0.3 V
14BRN(Service
check signal)
Detects service check con-
nector signal (DTC indica-
tion or DTC erasure)
I4-GNDSCS short
connector
ConnectedBelow 0.3 V
DisconnectedApprox. 5 V
16BRNfYELMCK(Motor check)
Detects pump motor drive
srg nal16-GNDPump motorONBattery voltage
OFFBelow 0.3 V
17LT BLU
RLW (+)
{Rear-left
wheel positive)
Detects left-rear wheel sen-
sor signal
17-18
q,
3
Turn wheel at
l turn/second
AC:
0.053 V or
above
oscilloscope:
0.15 Vp-p or
aoove
18GRY
RLW (_)
(Rear-left
wheel negative)
19GRNIVEL
RRW (+)
(Rearright
wheel positive)
Detects right-rear wheel
sensor srgnal
19-20
20BLU//EL
RRW (-)
(Rear-right
wheel negative)Stops0.25 - 1.15 V
21YEUGRNFSR
{Fail-safe relay)
Drives failsafe relay
(Fail-safe relay is turned
OFF to shut off the power
source to the solenoid and
pump motor relay when
problem occurs.)
21-GNDABS indicator
ONBelow 0.3 V
OFFApprox. 11V
LT BLU
DLC(Data link
connectorl
Communicates with Honda
PGM Tester22-GND
19-33