tow ACURA RL KA9 1996 Service Repair Manual

17-14, 17-2 3
18-3, 18-21 , 18-22
16- 3
19-2 8
8-4, 10-5 ,14-108 , 15-4 ,17-16 , 19- 8
10-2
9-5
11-126
23-12 3
* Accordin g t o stat e an d federa l regulations , failur e t o perfor m maintenanc e o n th e item s marke d wit h a n asteris k (* ) wil l no t voi d customer' s emissio n
warranties . However , Acur a recommend s tha t al l maintenanc e services be performe d a t th e recommende d tim e o r mileag e perio d to ensur e long-ter m
reliability .
Severe Drivin g Conditions :
• Drivin g les s tha n 5 mile s ( 8 km ) pe r tri p or , i n freezin g temperatures , drivin g les s tha n 1 0 mile s (1 6 km ) pe r trip .
• Drivin g in ho t [ove r 90° F (32°C) ] conditions .
• Extensiv e idlin g o r lon g period s o f stop-and-g o driving .
• Traile r towing , drivin g wit h a roof-to p carrier , o r drivin g in mountainou s conditions .
• Drivin g o n muddy , dusty , o r de-ice d roads .
NOTE: I f th e vehicl e is drive n OCCASIONALL Y unde r a "severe " condition , yo u shoul d follo w th e Norma l Condition s Maintenanc e Schedul e o n page s
3-2 and 3-3 .
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VSA Modulator-Contro l Uni t
Removal/Installatio n
NOTE:
• D o no t spil l brak e flui d o n th e vehicle ; i t ma y damag e th e paint ; i f brak e flui d doe s contac t th e paint , was h i t of f imme -
diatel y wit h water .
• Tak e car e no t t o damag e o r defor m th e brak e line s durin g remova l an d installation .
• T o preven t th e brak e flui d fro m flowing , plu g an d cove r th e hos e end s an d joint s wit h a sho p towe l o r equivalen t material .
Remova l
1. Disconnec t th e pressur e senso r 3 P connector .
2 . Pul l th e lockin g leve r o f th e VS A contro l uni t 42 P connec -
to r up , the n disconnec t th e connector .
3 . Disconnec t th e si x brak e lines .
4 . Remov e th e tw o 8 m m nuts .
5 . Remov e th e VS A modulator-contro l unit .
Installatio n
1 . Instal l th e VS A modulator-contro l unit , the n tighte n th e
two 8 m m nuts .
2. Alig n th e connectin g surface s o f th e VS A contro l uni t 42 P
connector .
3 . Pus h th e lockin g leve r o f th e VS A contro l uni t 42 P con -
necto r dow n unti l yo u hea r a click .
4 . Connec t th e pressur e senso r 3 P connector .
5 . Connec t th e si x brak e lines .
6 . D o th e steerin g angl e senso r neutra l memorizatio n pro -
cedur e (se e pag e 19-8 ).
7 . Blee d th e precharg e brak e lin e (se e pag e 19-10 ).
8 . Blee d th e brak e system , startin g wit h th e fron t wheels .
9 . Star t th e engine , an d chec k tha t th e AB S an d VS A indica -
tor s g o off .
10 . Test-driv e th e vehicle , an d chec k tha t th e AB S an d VS A
indicator s d o no t com e on .
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PGM-FI System

Primary Heated Oxygen Sensor (HO2S) (Sensor 1) (cont'd)

Troubleshooting Flowchart

Is DTC P0133 and/or P0153

indicated?
NO

YES
Intermittent failure, system is OK

at this time. Check for poor con-

nections or loose terminals at

C251, C254 (located at right shock

tower), C119 (right primary H02S

(Bank 1, Sensor 1)) or C126 (left

primary H02S (Bank 2, Sensor

1))*
and
PCM.
— The MIL has been reported on.

— DTC P0133 and/or P0153

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. Connect the SCS service con-

nector.

4. Test-drive under following

conditions.

— 55 mph (88 km/h) steady

speed

— Transmission in posi-

tion

— Until readiness code comes

on

Replace the primary HO2S (Sen-

sor 1).ProCarManuals.com

The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P0134: Right Primary Heated Oxygen Sensor

(Right Primary HO2S) (Bank 1, Sensor 1) heater system malfunction.

The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P0154: Left Primary Heated Oxygen Sensor

(Left Primary H02S) (Bank 2, Sensor 1) heater system malfunction.

The MIL has been reported on.

DTC P0134 and/or P0154 are

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.

Is DTC P0134 and/or P0154

indicated?

YES

Check for an open in the HO2S:

1. Turn the ignition switch OFF.

2.
Disconnect
the
right primary

H02S (Bank 1, Sensor 1) or left

primary HO2S* (Bank2, Sen-

sor 1) connector.

3. Install a jumper wire on the

harness side of the right prima-

ry H02S (Bank 1,Sensor 1) or

left primary H02S*connector

between terminals No. 1 and

No. 2.

4. Turn the ignition switch ON (II).

5. Check the right primary HO2S

(Bank 1, Sensor 1) or left pri-

mary HO2S*(Bank2, Sensorl)

output voltage with the HDS

or the scan tool.

Is there 1.5 V or more?

YES

Check for an open in the wires

(PHO2S line):

1. Turn the ignition switch OFF.

2. Install a jumper wire on the

PCM connector between D19,

orD18*andD22.

3. Turn the ignition switch ON (II).

4. Check the right primary H02S

(Bank 1, Sensor 1) or left pri-

mary H02S* (Bank 2, Sensor 1)

output voltage with the HDS

or the scan tool.

Is there 1.5 V or more?

YES
NO
Intermittent failure, system is OK

at this time. Check for poor con-

nections or loose terminals at

C251, C254 (located at right shock

tower), C119 (right primary H02S

(Bank 1, Sensor 1)) or C126 (left

primary H02S (Bank 2, Sensor 1))*

and
PCM.

Replace the HO2S.

Repair open in the wire between

PCM (019 or D18*) and right pri-

mary HO2S (Bank 1, Sensor 1) or

left primary HO2S* (Bank 2,

Sensor 1).

Substitute a known-good PCM and

recheck. If symptom/indication

goes away, replace the original

PCM.ProCarManuals.com

PGM-FI Syste m
Primar y Heate d Oxyge n Senso r (HO2S ) (Senso r 1 ) (cont'd )
The HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P2195 : A lo w voltag e proble m in th e Righ t
Primar y Heate d Oxyge n Senso r (H02S ) (Ban k 1 , Senso r 1 ) circuit .
The HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P2197 : A lo w voltag e proble m in th e Lef t
Primar y Heate d Oxyge n Senso r (HO2S ) (Ban k 2 , Senso r 1 ) circuit .
— Th e MI L ha s bee n reporte d on .— DT C P219 5 and/o r P219 7 ar e
stored .
Proble m verification :
1 . D o th e PC M Rese t Procedure .
2 . Star t th e engine . Hol d th e
engin e a t 3,00 0 rp m wit h n oloa d (i n Par k o r neutral ) unti lthe radiato r fa n come s on .3. Test-driv e wit h th e transmis -sion in [2 ] position .4. Chec k th e righ t primar y HO2 S
(Ban k 1 , Senso r 1 ) o r lef t pri -
mar y HO2S * (Ban k 2 , Senso r
1 ) outpu t voltag e wit h th e sca n
too l durin g acceleratio n usin g
wide ope n throttle .
Is DT C P219 5 and/o r P219 7indicated ?
Does i t sta y a t 0. 5 V or less ?
YES
(To pag e 11-55 )
NO
Intermitten t failure , syste m is O K
a t thi s time . Chec k fo r poo r con -
nection s o r loos e terminal s a tC251 , C25 4 (locate d a t righ t shoc k
tower) , C11 9 (righ t primar y H02 S
(Ban k 1 , Senso r 1) ) o r C12 6 (lef tprimar y HO2 S (Ban k 2 , Senso r1))* an d PCM .
NORepai r fue l suppl y system .
Replac e th e HO2S .
*:P015 1
Check fo r a shor t i n th e HO2S :1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e righ t primar yH02S (Ban k 1 , Senso r 1 ) o r
lef t primar y HO2S * (Ban k 2 ,
Senso r 1 ) connector .
3. Star t th e engin e an d le t i t idle .4. Chec k th e righ t primar y H02 S
(Ban k 1 , Senso r 1 ) o r lef t pri -
mar y H02S * (Ban k 2 , Senso r
1) outpu t voltag e wit h th eHD S o r th e sca n tool .
I
s i t normal ?
Chec
k th e fue l pressure .
ProCarManuals.com

PGM-FI System

Primary Heated Oxygen Sensor (HO2S) (Sensor 1) (cont'd)

The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P2297: A high voltage problem in the Right

Primary Heated Oxygen Sensor (Right Primary HO2S) (Bank 1, Sensor 1) circuit.

The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P2298: A high voltage problem in the Left

Primary Heated Oxygen Sensor (Left Primary HO2S) (Bank 2, Sensor 1) circuit.

— The MIL has been reported on.

— DTC P2297 and/or P2298 are

stored.

Problem verification:

1. Do the PCM Reset Procedure.

2. Test-drive with the transmis-

sion in [2] position.

3. Check the right primary H02S

(Bank 1, Sensor 1) or left primary

HO2S*(Bank2, Sensor 1) out-

put voltage with the scan tool

during deceleration using com-

pletely closed throttle.

Is DTC P2297 and/or P2298

indicated?
NO
Intermittent failure, system is OK

at this time. Check for poor con-

nections or loose terminals at

C251, C254 (located at right shock

tower), C119 (right primary H02S

(Bank 1, Sensor 1)) or C126 (left

primary HO2S (Bank 2, Sensor 1))*

and
PCM.

*: P2298
Replace the HO2S.ProCarManuals.com

PGM-FI Syste m
Crankshaf t Position/Camshaf t Positio n (CKP/CMP ) (Crankshaf t
Position/Cylinde r Positio n (CKP/CYP) ) Senso r
The HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0345 : A malfunctio n i n th e circui t o f th e
Crankshaf t Positio n (CKP ) senso r 1 .
Th e HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0349 : A n intermitten t interruptio n proble m of
th e Crankshaf t Positio n (CKP ) senso r 1 .
Th e HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0390 : A malfunctio n in th e circui t o f th e Camshaf t
Positio n (CMP ) (Cylinde r Positio n (CYP) ) senso r 1 .
Th e HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0394 : A n intermitten t interruptio n proble m
o f th e Camshaf t Positio n (CMP ) (Cylinde r Positio n (CYP) ) senso r 1 .
Th e HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P1336 : A n intermitten t interruptio n proble m o f
th e Crankshaf t Positio n (CKP ) senso r 2 .
I Th e HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P1337 : A malfunctio n i n th e circui t o f th e
' Crankshaf t Positio n (CKP ) senso r 2 .
Th e HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P1386 : A n intermitten t interruptio n proble m
o f th e Camshaf t Positio n (CMP ) (Cylinde r Positio n (CYP) ) senso r 2 .
Th e HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P1387 : A malfunctio n i n th e circui t o f th e
Camshaf t Positio n (CMP ) (Cylinde r Positio n (CYP) ) senso r 2 .
Th e CK P Senso r determine s timin g fo r injectio n an d ignitio n o f eac h cylinde r an d als o detect s engin e speed .
Th e CM P (CYP ) Senso r detect s th e positio n o f No . 1 cylinde r fo r sequentia l injectio n t o eac h cylinder . Th e CKP/CM P
(CKP/CYP ) Senso r i s installe d behin d th e fron t camshaf t pulley .
— Th e MI L ha s bee n reporte d on .— DT C P0345 , P0349 , P0390 ,P0394, P1336 , P1337 , P138 6
and/o r P138 7 ar e stored .
Proble m verification :
1. D o th e PC M Rese t Procedure .2. Star t th e engine .
Check fo r a n ope n i n th e CKP /CMP (CKP/CYP ) sensor :1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e CKP/CM P(CKP/CYP) 8 P connector .3. Measur e resistanc e betwee nthe terminal s o f th e indicate dsensor (se e table) .
Is ther e 65 0 - 85 0 fl ?
YE S
Chec k fo r a shor t i n th e CKP /CMP (CKP/CYP ) sensor :Check fo r continuit y t o bod ygroun d o n bot h terminal s o f th eindicate d sensor .
CKP PICK-U PCOIL 2
CM P (CYP ) PICK-U PCOIL 1
N O
Intermitten t failure , syste m is O Kat thi s time . Chec k fo r poo r con -nection s o r loos e terminal s a tC251 , C25 5 (locate d a t righ t shoc ktower) , C13 0 (CKP/CM P (CKP /CYP)) senso r an d PCM .
Replac e th e CKP/CM P (CKP/CYP )sensor (se e sectio n 6) .
CK P PICK-U PCOIL1
CMP (CYP ) PICK-U PCOIL 2
CKP/CM P (CKP/CYP ) SENSO R 8 P CONNECTO R
(To pag e 11-65 )Termina l sid e o f mal e terminal s
Is DT C P0345 , P0349 , P0390 , P0394 ,P1336, P1337 , P138 6 and/o r P138 7indicated ?
ProCarManuals.com

Idle Contro l Syste m
Idle Ai r Contro l (IAC ) Valv e
The HD S o r th e sca n too l indicate s Diagnosti c Troubl e Cod e (DTC ) P0511 : A proble m in th e Idl e Ai r Contro l (IAC )
valve circuit .
— Th e MI L ha s bee n reporte d on .
— DTCP051 1 i s stored .
Problem verification :1. D o th e PC M Rese t Procedure .
2 . Star t th e engine .
Is DTC P0511 indicated?
YES
Chec k fo r a n ope n i n the wir e
(IGP 1 line) :
1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e IA C valv e con -
nector .
3 . Tur n th e ignitio n switc h O N (II) .
4 . Measur e voltag e betwee n bod y
groun d an d th e IA C valv e con -
necto r termina l No . 2 .
I s ther e batter y voltage ?
I s ther e batter y voltage ?
YES
Chec k th e IA C valv e function :
Momentaril y connec t PC M con -
necto r terminal s A 5 an d A1 2 wit h
a jumpe r wir e severa l times .
Doe s th e IA C valv e click ?
YES
Substitut e a known-goo d PC M
an d recheck . I f symptom/indica -
tio n goe s away , replac e th e origi -
nal PCM .
NO
Intermitten t failure , syste m is O K
a t thi s time . Chec k fo r poo r con -
nection s o r loos e terminal s a t
C253 , (locate d a t righ t shoc k
tower) , C12 9 (IA C valve ) an d
PCM .
Repai r ope n in th e wir e betwee n
IA C valv e an d PGM-F I mai n relay . Wir
e sid e o f femal e terminal s
Repai r ope n o r shor t i n th e wir e
betwee n PC M (AS ) an d IA C valve .
Replac e th e IA C valve .
ProCarManuals.com

Emission Contro l Syste m
Exhaus t Ga s Recirculatio n (EGR ) Syste m (cont'd )
The HD S o r th e sca n tool indicate s Diagnosti c Trouble Code (DTC ) P0404 : An insufficien t lift o f th e Exhaus t Gas
Recirculatio n (EGR ) valve .
Is DT C P040 4 indicated ?NO
YE S
Chec k fo r vacuu m to th e EG Rvalve :1. Disconnec t th e No . 1 1 hos e fro mthe EG R valve .2. Connec t vacuu m pump/gaug e
t o th e hose .
3. Star t th e engin e an d le t i t idle .
Intermitten t failure , syste m is O K
a t thi s time . Chec k fo r poo r con -
nection s o r loos e terminal s a t
C251 , C25 4 (locate d a t righ t shoc k
tower) , C10 7 (EG R valve ) an d
PCM .
Is ther e an y vacuum ?NO
VACUU M PUMP/GAUGE , 0-3 0 in.H g
A973 X - 04 1 - XXXX X
YES
No. 1 1 VACUU M
HOS E
Chec k fo r a malfunctio n i n th e
EG R valv e vacuu m contro l
solenoid valve :1. Disconnec t th e contro l bo x 4 P
connector .
2 . Rechec k th e No . 1 1 hos e fo r
vacuum . (T
o pag e 11-86 )
(T o pag e 11-86 )
(cont'd )
11-85
— Th e MI L ha s bee n reporte d on .
— DT C P040 4 is stored .
Proble m verification :
1 . D o th e PC M Rese t Procedure .
2 . Connec t th e SC S servic e con -
nector .
3. Star t th e engine . Hol d th eengin e a t 3,00 0 rp m wit h n o
loa d (i n Par k o r neutral ) unti l
th e radiato r fa n come s on .
4 . Driv e th e vehicl e o n th e roa d fo r
abou t 1 0 minutes . Tr y t o kee pthe engin e spee d i n th e 1,70 0 -
2,50 0 rp m range .
ProCarManuals.com

Emission Control System

Exhaust Gas Recirculation (EGR) System (cont'd)

The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P0406: A high voltage problem in the

Exhaust Gas Recirculation (EGR) valve position sensor circuit.

— The MIL has been reported on.

— DTC P0406 is stored.

Problem verification:

1. Do the PCM Reset Procedure.

2. Turn the ignition switch ON (II).

Is DTC P0406 indicated?

YES

Check for an open in the EGR

valve position sensor:

1. Turn the ignition switch OFF.

2. Disconnect the EGR valve

position sensor connector.

3. Turn the ignition switch ON (II).

4. Measure voltage between the

EGR valve position sensor 3P

connector terminals No. 1 and

No. 3.

Is there about 5 V?

NO

Check for open in the wire (SG2

line):

Measure voltage between PCM

connector terminals D22 and D21.

Is there about 5 V?

NO

Substitute a known-good PCM

and recheck. If symptom/indica-

tion goes away, replace the origi-

nal
PCM.
NO
Intermittent failure, system is OK

at this time. Check for poor con-

nections or loose terminals at

C251, C254 (located at right shock

tower), C107 (EGR valve) and

PCM.

YES

Replace the EGR valve.

Repair open in the wire between

PCM (D22) and EGR valve posi-

tion sensor.

11-90ProCarManuals.com