tires ACURA RL KA9 1996 Service Repair Manual

Engine Removal/Installatio n
Removal (cont'd )
26. Disconnec t th e powe r steerin g pressur e (PSP ) switc h
connector .
ADJUSTIN GBOLT
LOCKNU T8 x 1.2 5 mm22 N- m (2. 2 kgf-m ,
1 6 Ibf-ft )
PS P SWITC H
CONNECTO R
P/S PUM P
BELTMOUNTIN G BOL T10 x 1.2 5 mm44 N- m (4. 5 kgf-m ,
3 3 Ibf-ft )
27. Remov e th e adjustin g bolt , locknu t an d mountin g
bolt, the n remov e th e powe r steerin g (P/S ) pum p
belt an d pump .
NOTE: D o no t disconnec t th e P/ S hoses .
28 . Pul l th e carpe t bac k underneat h th e fron t passen -
ger' s sea t t o expos e th e secondar y heate d oxyge n
senso r (secondar y HO2S ) connector , the n discon -
nec t th e secondar y HO2 S connector . 29
. Remov e th e radiato r cap .
Us e car e whe n removin g th e radiato r
ca p to avoi d scaldin g b y ho t coolan t o r steam .
30 . Rais e th e hois t t o ful l height .
31 . Remov e th e fron t tires/wheel s an d splas h shield .
SPLAS H
SHIEL D
6 x 1. 0 m m9.8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
32. Drai n th e engin e coolan t (se e pag e 10-5 ). Loose n
the drai n plu g in th e radiator .
33. Drai n th e automati c transmissio n flui d (ATF) . Reinstal l
th e drai n plu g usin g a ne w washe r (se e sectio n 14 ).
34 . Drai n th e differentia l oil . Reinstal l th e drai n plu g
usin g a ne w washer (see sectio n 15 ).
35 . Drai n th e engin e oil . Reinstal l th e drai n bol t usin g a
ne w washe r (se e pag e 8-4 ).
36 . Remov e th e dampe r fork s (se e sectio n 18 ).
37 . Disconnec t th e suspensio n lowe r ar m bal l joint s
(se e sectio n 18 ).
38 . Remov e th e driveshaft s (se e sectio n 16 ).
NOTE : Coa t al l precisio n finishe d surface s wit h
clea n engin e oil . Ti e plasti c bag s ove r th e driveshaf t
ends.
SECONDAR Y
HO2 S CONNECTO R
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Oil Pa n
Remova l
Engine remova l i s no t require d i n thi s procedure .
• Mak e sur e jack s an d safet y stand s ar e place d properl y
(se e sectio n 1 ).
• Appl y th e parkin g brak e an d bloc k th e rea r wheel s s o
th e vehicl e wil l no t rol l of f stand s whil e yo u ar e
workin g unde r it .
CAUTION :
• Us e fende r cover s t o avoi d damagin g painte d sur -
faces .
• Unplu g th e wirin g connector s carefull y whil e holdin g
th e connecto r portio n to avoi d damaging .
• Mar k al l wirin g an d hose s t o avoi d misconnection .
Also , b e sur e tha t the y d o no t contac t othe r wirin g
o r hose s o r interfer e wit h othe r parts .
1 . Loose n th e idle r pulle y cente r nu t an d adjustin g bolt ,
the n remov e th e ai r conditionin g (A/C ) compresso r
bel t (se e pag e 5-7 ).
2 . Disconnec t th e powe r steerin g pressur e (PSP )
switc h connector , the n remov e th e powe r steerin g
pum p bel t an d pum p (se e pag e 5-8 ).
3 . Remov e th e lef t an d righ t sid e exhaus t manifol d
covers (se e pag e 9-4 ).
4 . Rais e th e hois t t o ful l height .
5 . Remov e th e fron t tires/wheel s an d splas h shiel d
(se e pag e 5-8 ).
6 . Remov e th e dampe r fork s (se e sectio n 18 ).
7 . Disconnec t th e suspensio n lowe r ar m bal l joint s
with the specia l tool . Refe r t o sectio n 1 8 fo r th e
prope r procedure .
8 . Remov e th e driveshaft s an d intermediat e shaf t (se e
sectio n 16 ).
9 . Drai n th e differentia l oil . Reinstal l th e drai n plu g usin g
a ne w washe r (se e sectio n 15 ).
10 . Drai n th e engin e oil . Reinstal l th e drai n bol t usin g a
ne w washe r (se e pag e 8-4 ).
11 . Disconnec t th e vehicl e spee d senso r (VSS ) connec -
tor , the n remov e th e VSS/powe r steerin g spee d
senso r (se e pag e 5-9 ).
D o no t disconnec t th e flui d hoses .
12 x 1.2 5 mm64 N- m (6. 5 kgf-m , 4 7 Ibf-ft )Apply liqui d gaske t t o th ebol t threads .
12 x 1.2 5 mm64 N- m (6. 5 kgf-m ,
4 7 Ibf-ft )
12. Remov e th e lowe r plat e fro m th e rea r beam .
LOWE R PLAT E
10 x 1.2 5 mm38 N- m (3. 9 kgf-m ,
2 8 Ibf-ft )
13. Remov e th e A/ C compresso r (se e pag e 5-9 ).
14 . Attac h th e chai n hois t t o th e engin e (se e pag e 5-11 ).
15 . Remov e th e lef t engin e moun t bracke t (se e pag e 5-14 ).
16 . Remov e th e righ t engin e moun t bracket .
10 x 1.2 5 mm38 N- m (3. 9 kgf-m ,
2 8 Ibf-ft )12 x 1.2 5 mm64 N- m (6. 5 kgf-m ,
4 7 Ibf-ft )
RIGHT ENGIN E
MOUN T BRACKE T
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Wheel Alignment

Caster

NOTE: For proper inspection/adjustment of the wheel

alignment, check and adjust the following before check-

ing the alignment:

Check that the suspension is not modified.

Check the tire size and tire pressure.

Check the runout of the wheels and tires.

Check the suspension ball joints. (Hold a wheel with

your hands, and move it up and down and right and

left to check for wobbling.)

Inspection

NOTE: Use commercially available computerized four

wheel alignment equipment to measure wheel alignment

(caster, camber, toe, and/or turning angle). Follow the

equipment manufacturer's instructions.

1. Check the steering wheel angle; if significantly off

center, it may be necessary to remove the steering

wheel and reposition it on the splines. Turn the

steering wheel to the straight ahead position.

2. Check the caster angle.

Caster angle: 2°50'±1°

3. If out of specification, check for damaged suspen-

sion components.
Camber

Inspection

NOTE: Use commercially-available computerized four

wheel alignment equipment to measure wheel align-

ment (caster, camber, toe, and/or turning angle).

Follow the equipment manufacturer's instructions.

1. Check the camber angle.

Camber angle:

Front: 0°00'±1°

Rear: -0°30'±1°

2. If out of specification, check for bent or damaged sus-

pension components.ProCarManuals.com

Anti-lock Brak e Syste m (ABS )
Features/Constructio n
When th e brak e peda l i s presse d durin g driving , th e wheel s ca n loc k befor e th e vehicl e come s t o a stop . I n suc h a n event ,
th e maneuverabilit y o f th e vehicl e i s reduce d i f th e fron t wheel s ar e locked , an d th e stabilit y o f th e vehicl e is reduce d if th e
rea r wheel s ar e locked , creatin g a n extremel y unstabl e condition . Th e AB S precisel y control s th e sli p rat e o f th e wheel s t o
ensur e maximu m gri p forc e fro m th e tires , an d it thereb y ensure s maneuverability and stabilit y o f th e vehicle .
The AB S calculate s th e sli p rat e o f th e wheel s base d o n th e vehicl e spee d an d th e whee l speed , the n it control s th e brak e
flui d pressur e to attai n th e targe t sli p rate .
Grip Forc e o f Tir e an d Roa d Surfac eSlip Rat e
COEFFICIEN T O F
FRICTIO N
TARGET SLI P RAT E
SLIP RAT E
ROTATIONA LDIRECTION
RADIALDIRECTIO NOF TH EROTATIONA L
DIRECTIO N
BRAKINGSTART POIN T
A: Distanc e withou t sli p
B : Slippe d distanc e
C : Actua l distanc e
NO: Normall y Ope n
NC : Normall y Close d
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Construction and Function

TCS Control unit

Driving Control

When the drive wheel speed exceeds the vehicle speed by a given amount, the TCS control unit judges that the drive

wheels are slipping, and it outputs the traction control signal to reduce engine power.

Handling Control

Based on signals about right and left driven wheel rotational speeds, the control unit calculates the vehicle's "yaw" rate

(the turn rate of the vehicle's body). Based on signals from the steering angle sensor, the control unit also calculates the

yaw rate expected by the driver. If the difference between actual and expected yaw rates is substantial — that is, if the

direction of the vehicle's body will exceed the driver's expected line — the control unit signals the TCS control valve actu-

ator and PCM, thus reducing engine power and maintaining the expected line.

Rough Road Control

Based on signals from the wheel sensors, the control unit detects a rough road based on frequency of wheel rotational

vibration. The control unit then signals the TCS control valve actuator and PCM to relax engine power, thus improving

acceleration efficiency.

Grip Control

Based on signals about wheel speed and yaw rate, the control unit determines the efficiency of the grip of the tires on the

road and signals the TCS control valve actuator and PCM to relax engine power if necessary, thus improving grip.

Main Control BlockProCarManuals.com

Troubleshooting Precautions

1. In any of these cases, the TCS indicator light may come on or stay on even the TCS system is normal.

The coolant temperature is 32°F (0°C) or below.

The parking brake is applied for more than 30 seconds while the vehicle is being driven.

The tires are not inflated to the specified pressure.

The wheel sensor signal is interrupted during driving at speeds of 6 mph (10 km/h) or above due to, for example, a

vehicle spinning.

The MAP sensor, the coolant temperature sensor, the ICM or the atmospheric pressure sensor system of the PGM-FI

system is faulty.

2. TCS does not function when the TCS indicator light is ON.

3. When both the TCS indicator light and the MIL are ON, troubleshoot the PGM-FI system first.

4. When both the TCS indicator light and the ABS indicator light are ON, troubleshoot the ABS first.

5. The DTC 4-9 (ABS down) is memorized when the ABS control unit cannot output the wheel speed signal due to, for

example, a missing or blown ABS B2 (15 A) fuse. If you fail to erase the DTC of the TCS after troubleshooting the ABS,

the DTC remains in the TCS control unit memory. Therefore, be sure to test-drive the vehicle, and check the TCS indica-

tor light before starting to troubleshoot the TCS.ProCarManuals.com

DTC 25 : Ya w Rat e Senso r
Do thes e component s mee t
th e norma l standards ?
Check fo r a shor t t o powe r i n th eYR S RE F circuit :
1 . Disconnec t th e VS A contro l
uni t 42 P connector , th e ya w
rate/latera l acceleratio n sen -
so r 6 P connector .
2 . Tur n th e ignitio n switc h O N (II) .
3 . Measur e th e voltag e betwee n
th e VS A contro l uni t 42 P con -
necto r termina l No . 1 0 an d
bod y ground .
I s ther e batter y voltage ?
Chec k fo r a shor t t o powe r i n th e
YRS T circuit :Measur e th e voltag e betwee n th e
VS A contro l uni t 42 P connecto r
termina l No . 9 an d bod y ground .
I s ther e batter y voltage ?
Chec k fo r a shor t t o powe r i n th e
YRS S circuit :Measur e th e voltag e betwee n th e
VS A contro l uni t 42 P connecto r
termina l No . 4 1 an d bod y ground .
I s ther e batter y voltage ?
(To pag e 19-224 )
Repair t o norma l standards .
VSA CONTRO L UNI T 42 P CONNECTO R
Wir e sid e o f femal e terminal s
Repai r shor t t o powe r i n th e wir e
betwee n th e ya w rate/latera l
acceleration senso r an d th e VS Acontro l unit .
Repai r shor t t o powe r i n th e wir e
betwee n th e ya w rate/latera l
acceleratio n senso r an d th e VS A
contro l unit .
Repai r shor t t o powe r i n th e wir e
betwee n th e ya w rate/latera l
acceleration senso r an d th e VS Acontro l unit .
Chec
k th e wheels , tires , suspen -
sion , an d alignment .
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Troubleshooting
DTC 26 : Latera l Acceleratio n Senso r
Check th e wheels , tires , suspen -sion, an d alignment .
Do thes e component s mee t
th e norma l standards ?
Chec k fo r installatio n directio n o f
th e ya w rate/latera l acceleratio n
sensor.The senso r connecto r sid e mus t
b e facin g backward .
Is i t correct ?
Check fo r a shor t t o powe r i n th eAY circuit :1. Disconnec t th e VS A contro lunit 42 P connector , th e ya wrate/latera l acceleratio n sen -
so r 6 P connector .
2 . Tur n th e ignitio n switc h O N (II) .
3 . Measur e th e voltag e betwee n
th e VS A contro l uni t 42 P con -
necto r termina l No . 8 an d bod y
ground .
Is ther e batter y voltage ?
Chec k fo r a shor t t o bod y groun d
i n th e A Y circuit :
1. Tur n th e ignitio n switc h OFF .2. Chec k fo r continuit y betwee n
th e VS A contro l uni t 42 P con -
necto r termina l No . 8 an d bod y
ground .
I s ther e continuity ?
(To pag e 19-227 )
Repair t o norma l standards .
Reinstall th e ya w rate/latera lacceleration senso r correctly .
VSA CONTRO L UNI T 42 P CONNECTO R
Wir e sid e o f femal e terminal s
Repai r shor t t o powe r i n th e wir e
betwee n th e ya w rate/latera l
acceleration senso r an d th e VS Acontro l unit .
Repai r shor t t o bod y groun d in th ewir e betwee n th e ya w rate /lateral acceleratio n senso r a n d th e
VS A contro l unit .
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Troubleshooting

DTC 71: Abnormal Wheel Speed Signal

Are any DTCs except 71 indicated?

Check the tires.

Are tires with specified size and

inflated to specification?

Check for brake drag.

Do the brakes drag?

Visually check for appropriate

wheel sensor and pulser installa-

tion (see table).

Are they installed correctly?

Check the four pulser gears for a

chipped tooth (see table).

Is the pulser OK?

Problem Verification:

1. Clear the DTC.

2. Test-drive the vehicle at 19

mph (30 km/h) or more.

3. Verify the DTC.

Is DTC 71 indicated?

YES

Check for loose terminals in the

VSA control unit 42P connector.

If necessary, substitute a known-

good VSA modulator-control

unit, and recheck.
Preform the appropriate trou-

bleshooting for the DTC.

Replace the tire(s) with the spec-

ified size.

Repair the brake drag.

Reinstall or replace the wheel

sensor or pulser.

Replace the driveshaft or hub

unit. (Chipped pulser gear.)

The system is OK at this time.
Verify the DTC.ProCarManuals.com

Troubleshooting Precaution s
General Operatio n
Refer t o th e Acur a Navigatio n Syste m Owner' s Manua l fo r th e navigatio n syste m operatin g procedures .
Anti-thef t Featur e
Th e navigatio n syste m ha s a code d thef t protectio n circuit . B e sur e t o ge t th e customer' s four-digi t securit y cod e numbe r
before ;
• disconnectin g th e batter y
• disconnectin g th e navigatio n uni t connecto r
• removin g th e BACK-UP/RADI O (7. 5 A ) fus e fro m th e under-hoo d fuse/rela y bo x
Afte r service , reconnec t powe r t o th e navigatio n unit , an d tur n th e ignitio n switc h O N (II) . Ente r th e 4-digi t securit y code ,
then selec t "Done" . Whe n replacin g th e navigatio n unit , b e sur e to giv e th e custome r th e ne w anti-thef t securit y code .
Sympto m Diagnosi s
Certain circumstance s an d syste m limitation s wil l produc e occasiona l vehicl e positionin g errors . Som e customer s ma y
thin k thi s indicate s a proble m wit h th e navigatio n syste m when , i n fact , th e syste m is normal . Kee p th e followin g item s i n
min d whe n interviewin g customer s abou t navigatio n syste m symptoms .
Self-lnertia l Navigatio n Limitation s
Th e limitation s o f th e self-inertia l portio n o f th e navigatio n syste m (th e ya w rat e senso r an d th e vehicl e spee d sensor ) can
caus e som e discrepancie s betwee n th e actua l vehicl e positio n an d th e indicate d vehicl e position . I f ther e i s a larg e dis -
crepancy , an d th e syste m is receivin g GP S signals , th e syste m wil l adjus t th e indicate d vehicl e positio n to th e GP S vehicl e
position . However , i f GP S signal s canno t b e received , yo u mus t tun e th e vehicl e positio n manually .
Th e followin g circumstance s ma y caus e vehicl e positionin g error s unti l th e syste m ca n adjus t t o th e GPS .
• Movin g th e vehicl e wit h th e engin e stopped , suc h a s b y ferr y o r to w truck , o r i f th e vehicl e is spu n o n a tur n table .
• Tir e slippage , change s i n tir e rollin g diameters , an d som e drivin g situation s ma y caus e discrepancie s i n trave l dis -
tances . Example s o f thi s include :
— Continuou s tir e slippag e o n a slipper y surface .
— Drivin g wit h sno w chain s mounted .
— Abnorma l tir e pressures .
— Differen t diamete r tires .
— Frequen t lane s change s acros s a wid e highway .
— Continuou s drivin g o n a straigh t o r gentl y curvin g highway .
• Tolerance s i n th e syste m an d ma p accurac y sometime s limi t ho w precisel y th e vehicl e positio n is indicated .
Example s o f thi s include :
— Drivin g o n road s no t show n o n th e ma p (ma p matchin g is no t possible) .
— Drivin g o n a roa d tha t wind s in on e direction , suc h a s a loo p bridge , a n interchange , o r a spira l parkin g garage .
— Drivin g o n a roa d wit h a serie s o f shar p hair-pi n turns .
— Drivin g o n on e o f tw o clos e paralle l roads .
— Afte r makin g man y 9 0 degre e turns .
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