Page 1133 of 2189

I
Suspension Arms Replacement ('99 2D Si and Si-R models)
CAUTION:
. Replace the selt-locking nuts after removal.
. The vehicle should be on the ground belore any bolts or nuts connected to rubber mounts or bushings are tightened.
NOTE:
. Wipe off any dirt, oil or grease on the threads before tightening the fasteners
. The right and ieft damper forks are not interchangeable. The left damper fork is marked with "AL" while the right
damper fork is marked with "AR"
. The right and left upper arms are not interchangeable. The left upper arm is marked with "SOl-L" while the right upper
arm is marked with "SO1-R".
. Before tightening the upper and lower mounting nuts on the stabilizer link, adiust the location of the link with the sus-
pension under vehicle load.
. When installing the radius arm washers, the "FR" mark faces the front of the vehicle.
. After installing the suspension arm, check the front wheel alignment, and adjust if necessary (see page 18-4).
FLANGE BOLTS10 x 1.25 mmsit N.m 15.5 kgf.m,40 tbtftl
UPPER ARM' Check the ball joint boot fordeterioration and damage.. Check the bushing for deteriorationano oamage,. Check the ball ioint fo. faultymovement and clamage.STABILIZER BUSHINGAlign the stabilizer markwith the end of stabilizer bushing
FLANGE BOLT14 x 1.5 mm
l./
103 N.m (10.5 kgf.m,76 tbr.ftl
STABILIZER LINK. Check the ballioint bootfordeterioration and damage.. Checkthe ballioint tor faultymovement and damage.
STABILIZER BARCheck for bending and damage.
FLANGE BOLT 8 x 1.25 mm22 N.m (2.2 kgf.m, 16lbf.ft)
SELF-LOCKING NUT14 x 1.5 mmReplace.83 N.m 18.5 kgf m, 61 lbf.ft)
-.6r srr-,co", hSHrtlrT.[*"u
6g619g Check for deteriorationano oamage.
SELF.LOCKING NUT10 x 1.25 mm 29 N m 13.0 kgf m, 22 lbf ftl
Replace.Hold the ball ioint pin using a hex wrench,
and taghten the self'locking nut.
LOWER ARMCheck fordamage.
FLANGE NUT l0 x 1.25 mm
29 N.m 13.0 kgI m,2.2 lbf ft)
Before tightening the {lange nut,position the ball joint Pinin the middle of its range of travel,
with the suspension under vehicle load
FLANGE BOLT14 x 1.5 mm89 N.m 19.1 kgf.m, 66 lbf.ft)
FLANGE BOLT10 x '1.25 mm43 N.m {4.4 kgf.m,32 tbtft)
DAMP€R FORKCheck lor damage.
DAMPER FORKRU88ER BUSHINGCheck for deterioration and damage.
4@lsrlrcoNE GREASE
SELF.LOCKING NUT12 x 1.25 mmReplace.64 N m 16.5 kgl.m, 47 lblft)
J
RANGE
18-9
Page 1202 of 2189
L
Wheel Soeed and Modulator Contlo
t
OUTLETVALVE ON
OFF
INLETVALVE ON
OFF
t\,40ToR
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 SensoJ
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.
There are four wheel sensors, one for each wheel
The gear pulser has 50 teeth.
EEL SPEED
at LOW SPEEDgl
=o
GEAR PULSEBWHEEL SENSOBat HIGH SPEED
/
19-49
Page 1207 of 2189

Troubleshooting Precautions
ABS Indicator Light
I The ABS indicator light comes on when the ABS control unit detects a problem in the system. However, even thoughthe system is normal, the ABs indicator light can come on, too, under the following conditions. To determine theactual cause of the problem, question the customer about the problem, taking the following conditions into consider-ation.
. Signal disturbance
. Wheel soin
. Only drive wheels rotate. Battery voltage fluctuates
2. When a problem is detected and the ABS indicator light comes on, the indicator light can stay on untat the ignitionswitch is turned off, or it can automatically go off, depending on the mode.. Lightstayson until the ignition switch isturned off;When the system is inthesvstem down mode.o Light automatically goes off:When the system is in the control inhibition mode.(refer to symptom-to-system chart)3 The ABS indicator light stays on when the system is reactivated without erasing the DTC, but it goes off after startingthe car.
when the wheel sensor system is faulty and the ABS indicator light comes on, the algorithm of the system automaticallyturns off the ABS indicator light after the wheel speed signal returns to the normal speed. while, when the DTC is erased,the CPU is reset and the ABS indicator light goes off when the system check€d out normal by the initial diagnosis.Therefore, test-drive the car after servicing the wheel sensor system, and be sure that the ABS indicator light does notcome on.
4. When the ABS control unit outputs battery voltage to the gauge assembty, the ABS indicator light goes off.
Diagnostic Trouble Code (DTC)
1. The diagnostic trouble code (DTC) is memorized when a problem is detected and the ABS indicator light does not gooff, or when the ABS indicator light comes on.The DTC is not memorized when the ABs indicator right comes on unress the cpU is activated.2. The memory can hold any number of DTCs. However, when the same DTc is detected twice or more, the later one iswritten over the old one.
Therefore. when the same problem is detected repeatedly, it is recorded as one DTC.3. The DTCS are indicated in the order of ascending number, not in the order thev occur.4. The DTCS are memorized in the EEpROM {non-volatile memorv}.Therefore, the memorized DTCS cannot be canceled by disconnecting the battery. perform the specified orocedures toerase.
Solf-diagnosis
1. The self-diagnosis can be classifield into these four categories:' Initial diagnosis; Performed right after the engine sta rts and untiltheABs indicator light goes off.o Except ABS control: Performed when the ABS is not functioning,. During ABS control: Performed when the ABS is functioning.. During warning: Performed when the ABS indicator light is ON.2 The system performs the following controls when a problem is detected by the self-diagnosis:. ABS indicator light ON. Memory of DTC
. Mode change to the "system down mode,, or the "control inhibition mode,,.
MODEABS INDICATOR LIGHTMAIN
RELAY
SOLENOID
VALVECPURestart conditionDTC
SYSTEM
DOWNONNo
operal|on
Drive
inhibitionOperation+rlgnition
switchOFF - ONMemory
CONTROL
INHIBITIONONNo
operat|on
Orive
inhibitionOperationAutomaticMemory
*1: Except CPU failure
19-54