ACURA RL KA9 1996 Service Repair Manual

Radiator
Engine Coolan t Refillin g an d Bleedin g
'01 model :
CAUTION : Whe n pourin g engin e coolant , b e sur e t o
shu t th e rela y bo x li d an d no t t o le t coolan t spil l o n th e
electrica l part s o r th e paint . I f an y coolan t spills , rins e it
of f immediately .
NOTE:
Perfor m thi s procedur e whe n th e engin e is cool .
Befor e replacin g th e coolant , tur n th e ignitio n O N (II) ,
slowl y tur n th e climat e contro l temperatur e kno b t o
90° , an d tur n of f th e ignition . Thi s wil l allo w th e
coolan t i n th e heate r t o drai n ou t wit h th e res t o f th e
system .
Whe n th e radiato r i s cool , remov e th e radiato r cap .
Loose n th e drai n plug , an d drai n th e coolant .
DRAINPLUG
DRAI N CA P
2. Remov e th e drai n ca p fro m th e coolan t drai n pip e
t o drai n th e block .
3 . Pu t th e drai n ca p bac k i n place , the n reinstal l th e
cli p o n th e drai n ca p securely .
4 . Tighte n th e radiato r drai n plu g securely .
5 . Remove , drai n an d reinstal l th e coolan t reservoir .
Fil l th e tan k t o th e MA X mar k wit h Hond a Al l
Seaso n Antifreeze/Coolan t Typ e 2 .
6 . Remov e th e engine cover (se e pag e 5-3 ). 7
. Loose n th e ai r blee d bol t i n th e thermosta t housing ,
the n pou r Hond a Al l Seaso n Antifreeze/Coolan t
Typ e 2 int o th e radiato r t o th e botto m o f th e fille r
neck . D o no t le t coolan t spil l o n an y electrica l part s
o r th e paint . I f an y coolan t spills , rins e i t of f immedi -
ately .
NOTE :
Alway s us e Hond a Al l Seaso n Antifreeze/Coolan t
Typ e 2 . Usin g a non-Hond a coolan t ca n resul t i n
corrosion , causin g th e coolin g syste m to mal -
functio n o r fail .
Hond a Al l Seaso n Antifreeze/Coolan t Typ e 2 is a
mixtur e o f 50 % antifreez e an d 50 % water . Pre -
mixin g i s no t required .
8 . Tighte n th e blee d bol t a s soo n a s coolan t start s t o
ru n ou t i n a stead y stream .
9 . Wit h th e radiato r cap off, star t th e engin e an d le t i t
ru n unti l warme d u p (radiato r fa n come s o n a t leas t
twice) . Then , i f necessary , ad d mor e genuin e Hond a
Al l Seaso n Antifreeze/Coolan t Typ e 2 to brin g th e
leve l bac k u p t o th e botto m o f th e fille r neck .
10 . Pu t th e radiato r ca p o n tightly , the n ru n th e engin e
agai n an d chec k fo r leaks .
Engin
e Coolan t Refil l Capacit y [Includin g reservoi r
(0.65 (0.6 9 U S qt , 0.5 7 Im p qt))] :
6.1 (6. 4 US qt , 5. 4 Im p qt )
BLEE D BOL T9.8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
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Cap Testing
Testing

1. Remove the radiator cap, wet its seal with engine

coolant, then install it on the pressure tester.

RADIATOR

CAP

2. Apply a pressure of 93- 123 kPa (0.95- 1.25 kgf/cm2,

14-18 psi).

3. Check for a drop in pressure.

4. If the pressure drops, replace the cap.
1. Wait until the engine is cool, then carefully remove

the radiator cap and fill the radiator with engine

coolant to the top of the filler neck.

2. Attach the pressure tester to the radiator and apply

a pressure of 93-123 kPa (0.95 - 1.25 kgf/cm2, 14 -

18
psi).

RADIATOR PRESSURE

TESTER

(Commercially available)

3. Inspect for engine coolant leaks and a drop in pres-

sure.

4. Remove the tester and reinstall the radiator cap.

NOTE: Check for engine oil in the coolant and/or

coolant in the engine oil.
RADIATOR PRESSURE TESTER

(Commercially available)

SMALL ADAPTOR

(for 32 mm neck, low profile)
SMALL ADAPTOR

(for 32 mm neck, low profile)ProCarManuals.com

Thermostat

Replacement

NOTE: Use new O-rings when reassembling.

BLEED BOLT

9.8 N-m (1.0 kgf-m,

7.2 Ibf-ft)

ENGINE COOLANT

TEMPERATURE

(ECT) GAUGE

SENDING UNIT

9 N-m (0.9 kgf-m,

7 Ibf-ft)
ENGINE COOLANT

TEMPERATURE

(ECT) SENSOR

18 N-m (1.8 kgf-m, 13 Ibf-ft)

THERMOSTAT

COVER
O-RING

Replace.

THERMOSTAT

Install with pin up.

RUBBER SEAL

Replace.

6 x 1.0 mm

12 N-m (1.2 kgf-m,

8.7 Ibf-ft)ProCarManuals.com

Testing
Replac e th e thermosta t i f i t i s ope n a t roo m temperature .
T o tes t a close d thermostat :
1 . Suspen d th e thermosta t i n a containe r o f wate r a s
shown .
THERMOMETE R
THERMOSTA T
2. Hea t th e water , an d chec k th e temperatur e wit h a
thermometer . Chec k th e temperatur e a t whic h th e
thermosta t firs t opens , an d a t whic h it i s full y open .
CAUTION : D o no t le t th e thermomete r touc h th e
botto m o f th e ho t container .
3 . Measur e lif t heigh t o f th e thermosta t whe n i t i s full y
open .
STANDAR D THERMOSTA T
Lif t height : abov e 10. 0 m m (0.3 9 in )
Start s opening : 169 ° - 176° F (76° - 80°C )
Full y open : 194° F (90°C )
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Water Pum p
Illustrate d Inde x
NOTE :
Use ne w O-ring s whe n reassembling .
Use liqui d gasket , Par t No . 0871 8 - 000 1 o r 0871 8 - 0003 .
ENGIN E COOLAN T
BLEE D BOL T TEMPERATUR E
9. 8 N- m (1. 0 kgf-m , (ECT ) SENSO R
7. 2 Ibf-ft ) 1 8 N- m (1. 8 kgf-m , 1 3 Ibf-ft )
ENGIN E COOLAN T
TEMPERATUR E
(ECT ) GAUG E
SENDIN G UNI T9 N- m (0. 9 kgf-m ,
7 Ibf-ft )
6 x 1. 0 m m12 N- m (1. 2 kgf-m , 8. 7 Ibf-ft )
8 x 1.2 5 mm22 N- m (2. 2 kgf-m , 1 6 Ibf-ft )
WATE RPASSAG E
INTAKE
MANIFOL D
THROTTL EBODY
O-RING SReplace .
WATE R BYPAS S
PIPE
O-RIN G
Replace .
THERMOSTA T
HOUSINGASSEMBL Y
6 x 1. 0 m m12 N- m (1. 2 kgf-m ,
8. 7 Ibf-ft )
6 x 1. 0 m m12 N- m (1. 2 kgf-m ,
8. 7 Ibf-ft )
REA R WATE R OUTLE T
Apply liqui d gaske tto th e cylinde r hea dmatin g surface .
CONNECTIN GPIPE
8 x 1.2 5 mm22 N- m (2. 2 kgf-m , 1 6 Ibf-ft )
DOWE L
PIN
8 x 1.2 5 mm22 N- m (2. 2 kgf-m ,16 Ibf-ft ) O-RIN
G
Replace .WATER PUM PInspection , pag e 10-1 0
GASKET SReplace.
O-RING
Replace .
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Inspection
1. Remov e th e timin g bel t (se e pag e 6-8 ).
2 . Tur n th e wate r pum p pulle y counterclockwise .
Chec k tha t i t turn s freely .
BLEED HOL E
3. Chec k fo r sign s o f sea l leakage .
NOTE: A smal l amoun t o f "weeping " fro m th e blee d
hol e is normal .
Replacemen t
1. Remov e th e timin g bel t (se e pag e 6-8 ).
2 . Remov e th e lef t camshaf t pulle y an d bac k cove r
(see pag e 6-24 ).
3 . Remov e th e wate r pump .
NOTE : Inspec t an d clea n th e O-rin g groov e an d
matin g surfac e wit h th e cylinde r block .
O-RIN GReplace .8 x 1.2 5 mm22 N- m (2. 2 kgf-m ,
1 6 Ibf-ft )
DOWE LPIN
DOWE L PI N
8 x 1.2 5 mm22 N- m (2. 2 kgf-m ,
1 6 Ibf-ft )
6 x 1. 0 m m12 N- m (1. 2 kgf-m ,
8. 7 Ibf-ft )
4. Instal l th e wate r pum p in th e revers e orde r o f removal .
NOTE:
Keep th e O-rin g in positio n whe n installing .
Clea n u p th e spille d engin e coolant .
WATERPUMP
O-RIN GReplace .
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Fan Control s
Componen t Locatio n Inde x
RADIATO R FA N RELA Y
Wir e colors : BLK/YEL , YEL ,
L T GRN/BL K an d BL U FA
N CONTRO L
MODUL E
CONDENSE R FA N RELA Y
Wir e colors : BLK/YEL ,
WHT , BL U an d BLU/OR N
RADIATO R FA N
MAI N RELA Y
Wir e colors : BLK/YEL , RED ,
L T GRN/BLK , BL K an d BL U
RADIATO R FA N
RADIATOR FA N
CONTRO L SENSO R
Testing , pag e 10-1 4
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Fan Controls

Troubleshooting

NOTE: The numbers in the table show the troubleshooting sequence.

G301

G302

G301

G302

G402

G402

Fan Control Module Terminals

FAN CONTROL

MODULE
Terminal Wire
Connects to

1

2

3

4

5

6

7

8

9

10

11

12
GRN/RED

BLK

RED/WHT

LT GRN/BLK

GRN/BLK

BLK/YEL

PNK

BLU/ORN

BLU/GRN
A/C pressure switch

Not used

Ground

A/C pressure switch

Radiator fan relay (Coil )

Radiator fan control sensor

IG2 (Main power supply)

PCM

Not used

Condenser fan relay (Coil )

Not used

Radiator fan control sensor
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Fan Moto r Testin g
1. Disconnec t th e 2 P connector .
RADIATOR FA N MOTO R
TERMINA L SID E O F
MAL E TERMINAL S
2. Tes t th e moto r b y connectin g batter y powe r t o th e
No . 2 termina l an d groun d t o th e No . 1 terminal .
3 . I f th e moto r fail s t o ru n o r doe s no t ru n smoothly ,
replac e it .
Radiato r Fa n Contro l Senso r
Testin g
Removin g th e radiato r fa n contro l senso r
whil e th e engin e i s ho t ca n caus e th e coolan t t o spra y
out , seriousl y scaldin g you . Alway s le t th e engin e an d
radiato r coo l dow n befor e removin g th e radiato r fa n
contro l sensor .
NOTE : Blee d ai r fro m th e coolin g syste m afte r installin g
th e radiato r fa n contro l senso r (se e pag e 10-5 ).
1 . Remov e th e radiato r fa n contro l senso r fro m th e
radiato r (se e pag e 10-2 ).
2 . Suspen d th e radiato r fa n contro l senso r i n a con -
taine r o f wate r a s shown .
THERMOMETE R RADIATO
R FA N
CONTRO L SENSO R
WATER
3. Hea t th e water , an d chec k th e temperatur e wit h a
thermometer .
CAUTION : D o no t le t th e thermomete r touc h th e
botto m o f th e ho t container .
4 . Measur e th e resistanc e betwee n th e A an d B termi -
nal s accordin g t o th e table .
Temperatur e
Resistance ( K ) 183°
F (84°C )
1.047-1.25 4
194°F (90°C )
0.872-1.02 4
5 . I f yo u don' t ge t th e abov e readings , replac e th e
radiato r fa n contro l sensor .
NOTE : Clea n th e senso r afte r testing .
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Engine Coolan t Temperatur e (ECT ) Gaug e
Gauge Testin g
1. Chec k th e No . 2 0 (2 0 A ) fus e in th e under-das h fuse /
rela y bo x befor e testing .
2 . Remov e th e engin e cove r (se e pag e 5-3 ).
3 . Mak e sur e th e ignitio n switc h i s OFF , the n discon -
nec t th e YEL/GR N wir e fro m th e EC T sendin g unit ,
and groun d it wit h a jumpe r wire .
ECT SENDIN GUNIT
YEL/GR NWIRE
4. Tur n th e ignitio n switc h O N (II) . Chec k tha t th e
pointe r o f th e EC T gaug e start s movin g towar d th e
"H " mark .
CAUTION : Tur n th e ignitio n switc h OF F befor e th e
pointe r reache s "H " o n th e gaug e dial . Failur e to d o
s o ma y damag e th e gauge .
If th e pointe r o f th e gaug e doe s no t mov e a t all ,
chec k fo r a n ope n in th e YEL/GR N wire .
I f th e wire s ar e OK , replac e th e EC T gauge .
I f th e EC T gaug e works , tes t th e EC T sendin g
unit.
ECT Sendin g Uni t Testin g
1. Remov e th e engin e cove r (se e pag e 5-3 ).
2 . Disconnec t th e YEL/GR N wir e fro m th e EC T sendin g
unit.
YEL/GR N WIR E(Covere d wit hinsulation )POSITIVETERMINA L
ECT SENDIN GUNIT
3. Usin g a n ohmmeter , measur e th e chang e i n resis -
tanc e betwee n th e positiv e termina l an d th e engin e
(ground ) wit h th e engin e col d an d wit h th e engin e
a t operatin g temperature .
Temperature
Resistance ( )
122°F(50°C )
226
239°F(115°C )
26.4
4. I f th e obtaine d reading s ar e substantiall y differen t
fro m th e specification s above , inspec t th e coolan t
leve l an d th e coolin g system . I f th e coolin g syste m
i s OK , replac e th e sendin g unit .
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