radiator ACURA RL KA9 1996 Service User Guide

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 )
ProCarManuals.com

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

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
ProCarManuals.com

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
PCMProCarManuals.com

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 .
ProCarManuals.com

How to Set Readiness Codes

Catalytic Converter

NOTE:

• Do not turn the ignition switch OFF.

• When the battery negative cable is disconnected, all

readiness codes are cleared.

Required condition ('96 - 97 models):

• Ambient temperature between 32 - 95°F (0 - 35°C).

• Altitude below 2,400 m (7,874 ft.).

Required condition ('98 - 01 models):

Ambient temperature between 20 - 95°F (-7 - 35°C).

1. Connect the scan tool to the Data Link Connector

(DLC).

2. Start the engine. Hold it at 3,000 rpm with no load

(in Park or neutral) until the radiator fan comes on.

3. Drive for about 10 minutes without stopping on a

highway or freeway. Your speed can vary.

4. '96 - 97 models:

With the transmission in D4 position, drive at a

steady speed between 33 - 37 mph (53 - 59 km/h)

for 30 seconds.

'98 - 01 models:

With the A/T in D4 position, drive at a steady speed

between 50 - 62 mph (80 - 100 km/h) for 30 sec-

onds.

5. Do step 4 three times. Between each repetition,

close the throttle completely for 1 - 2 seconds. If the

engine is stopped during this part of the procedure,

go to step 3 and do the procedure again.

6. Check for the readiness code with the scan tool.

EGR Monitor

NOTE:

• Do not turn the ignition switch OFF.

• When the battery negative cable is disconnected, all

readiness codes are cleared.

Required condition ('96 - 97 models):

Altitude below 2,400 m (7,874 ft.).

1. Connect the scan tool to the Data Link Connector

(DLC).

2. Start the engine, and hold it at 3,000 rpm with no

load (in Park or neutral) until the radiator fan comes

on.

3. Drive at a steady speed with the transmission in D4

position, between 50 - 62 mph (80 - 100 km/h) for

more than 10 seconds.

4. With the A/T in D4 position, decelerate from 62 mph

(100 km/h) by completely releasing the throttle for

at least 5 seconds. If the engine is stopped during

this procedure, go to step 3 and do the procedure

again.

5. Check for the readiness code with the scan tool.
EVAP Leak Monitor

NOTE:

• When the battery negative cable is disconnected, all

readiness codes are cleared.

• If the engine is stopped while doing the procedure

between stops 6 and 16, do this procedure from step

1 again.

1. Make sure the gasoline level is 60 - 90% of fuel tank

capacity (not full).

2. Turn the ignition switch OFF.

3. Let the vehicle sit more than 8 hours.

4. '96 - 97 models:

Make sure the outside temperature is 32 - 95°F (0 -

35°C).

'98 - 01 models:

Make sure the outside temperature is 20 - 95°F (-7 -

35°C).

5. Connect the scan tool to the Data Link Connector

(DLC).

6. Start the engine and drive for about 15 minutes.

7. '96 - 97 models:

Keep the vehicle at a steady speed between 50 - 62

mph (80 - 100 km/h), without moving the accelera-

tor pedal, for about 1 minute.

'98 - 01 models:

Keep the vehicle at a steady speed between 50 - 70

mph (80 - 114 km/h), without moving the accelera-

tor pedal, for about 1 minute.

8. Stop the vehicle (do not stop engine).

9. Repeat steps 7 and 8 two more times.

10. Check for the readiness code with the scan tool. If

the readiness code does not set, go to step 11.

11. When ambient temperature is less than 32°F (0°C),

hold the engine at 3,000 rpm with no load (in Park

or neutral) until the radiator fan comes on.

12. When ambient temperature is more than 86°F

(30°C), remove the fuel fill cap, then install the fuel

fill cap.

13. After step 12, drive for about 20 minutes on a free-

way.

14. '96 - 97 models:

Keep the vehicle at a steady speed between 50 - 62

mph (80 - 100 km/h), without moving the accelera-

tor pedal, for about 1 minute.

'98 - 01 models:

Keep the vehicle at a steady speed between 50 - 70

mph (80 - 114 km/h), without moving the accelera-

tor pedal, for about 1 minute.

15. Stop the vehicle (do not stop the engine).

16. Repeat steps 14 and 15 two more times.

17. Check for the readiness code with the scan tool.ProCarManuals.com

PGM-FI System

How to Set Readiness Codes (cont'd)

HO2S Monitor

NOTE:

• Do not turn the ignition switch OFF.

• When the battery negative cable is disconnected, all

readiness codes are cleared.

Required condition ('96 - 97 models):

• Ambient temperature between 32 - 95°F (0 - 35°C).

• Altitude below 2,400 m (7,874 ft.).

Required condition ('98 - 01 models):

Ambient temperature between 20 - 95°F (-7 - 35°C).

1. Connect the scan tool to the Data Link Connector

(DLC).

2. Start the engine, and hold it at 3,000 rpm with no

load (in Park or neutral) until the radiator fan comes

on.

3. Let the engine idle for 5 seconds.

4. Drive at a steady speed between 50 - 62 mph (80 -

100 km/h) for about 2 minutes.

5. With the A/T in D4 position, decelerate from 62 mph

(100 km/h) by completely releasing the throttle for

at least 5 seconds. If the engine is stopped during

this procedure, go to step 4 and do the procedure

again.

6. Check for the readiness code with the scan tool.

HO2S Heater Monitor

NOTE: When the battery negative cable is disconnected,

all readiness codes are cleared.

1. Connect the scan tool to the Data Link Connector

(DLC).

2. Start the engine, and let the engine idle for 10 min-

utes.

3. Check for the readiness code with the scan tool.ProCarManuals.com

The scan tool indicates Diagnostic Trouble Code (DTC) P1128: Manifold Absolute Pressure (MAP) lower than

expected.

— The MIL has been reported on.

— DTC P1128 is stored.

Problem verification:

1. Turn the ignition switch ON (II).

2. Check the MAP with the scan

tool.

Is 54.1 kPa (406 mmHg, 16.0

in.Hg) or higher indicated?
Intermittent failure, system is OK

at this time.

The scan tool indicates Diagnostic Trouble Code (DTC) P1129: Manifold Absolute Pressure (MAP) higher than

expected.

Is 43.3 kPa (325 mmHg, 12.8

in.Hg) or less indicated?
Intermittent failure, system is OK

at this time.

Replace the MAP sensor.
NO
YES
Problem verification:

1. Start the engine. Hold the

engine at 3,000 rpm with no

load (in Park or neutral) until

the radiator fan comes on, then

let it idle.

2. Check the MAP with the scan

tool.
— The MIL has been reported on.

— DTC P1129 is stored.
Replace the MAP sensor.
NO
YESProCarManuals.com

PGM-FI System

Secondary Heated Oxygen Sensor (HO2S) (Sensor 2) (cont'd)

Does the voltage stay within

0.3 - 0.6 V for 2 minutes?
NO
Intermittent failure, system is OK

at this time. Check for poor con-

nections or loose wires at C444

(located behind right kick panel),

C610 (secondary HO2S (Sensor

2)) and
PCM.
The scan tool indicates Diagnostic Trouble Code (DTC) P0139: A slow response problem in the Secondary

Heated Oxygen Sensor (Secondary HO2S) (Sensor 2) circuit.

— The MIL has been reported on.

— DTC P0139 is stored.

Problem verification:

1. Do the PCM Reset Procedure.

2. Start the engine. Hold the

engine at 3,000 rpm with no

load (in Park or neutral) until

the radiator fan comes on.

3. Check the secondary HO2S

(Sensor 2) or output at 3,000

rpm with the scan tool.

Replace the secondary HO2S (Sen-

sor 2).
YESProCarManuals.com

PGM-FI System

Fuel Supply System (cont'd)

— The MIL has been reported on.

— DTC P0171, P0172, P0174 and/

or P0175 are stored.

Check the fuel pressure.

Is the fuel pressure OK?
NO

YES

Check the Primary HO2S:

1. Start the engine. Hold the

engine at 3,000 rpm with no

load (in Park or neutral) until

the radiator fan comes on.

2. Check the right primary or left

primary* HO2S (Sensor 1) out-

put with the scan tool.
Is the fuel pressure too high

or too low?
Check the fuel pressure regulator

and fuel return pipe.

LOW

Check the fuel pump, fuel feed

pipe, fuel filter, and fuel pressure

regulator.

Does it stay at less than 0.3 V

or more than 0.6 V?
Replace the HO2S.

NO

Check for a sticking or leaking

EVAP canister purge valve:

With a vacuum pump, apply vacu-

um to the EVAP canister purge

valve from the intake manifold

side.

Does it hold vacuum?

('96 model only)
Replace the EVAP canister purge

valve.

YES

Check the MAP sensor output:

1. Turn the ignition switch ON (II).

2. Check the MAP with the scan

tool.

Does it indicate atmospheric

pressure?
YES

*: P0174 or P0175
Check the response of the MAP

sensor:

1. Start the engine.

2. Check the MAP with the scan

tool.

Is a MAP of 40.0 kPa (300 mmHg,

12.0 inHg) or less indicated within

one second after starting the

engine?
Replace the MAP sensor.

YES

Check the EGR system. If it is OK,

replace the fuel injectors.
NO
NO

Replace the MAP sensor.
NO
YES
HIGH
Troubleshooting FlowchartProCarManuals.com