1996 ACURA RL KA9 wheel

Position

The power flow when decelerating is as follows:

1. Rolling resistance from the road surface goes through the front wheels to the secondary drive gear, then to the counter-

shaft 1st gear via the Ist-hold clutch which is applied during deceleration.

2. Power transmitted to the countershaft 1st gear is conveyed via the 1st gear one-way clutch on the inside of the counter-

shaft 1st gear to the countershaft 2nd gear. The 1st gear one-way clutch is used to drive the countershaft 2nd gear.

3. The 2nd gear one-way clutch disengages at this time because the application of torque is reversed.

4. The counterforce conveyed to the countershaft 1st gear turns the mainshaft 2nd gear. At this time, since hydraulic pres-

sure is applied to the 2nd clutch, counterforce is transmitted to the mainshaft. As a result, engine braking can be

obtained with 2nd gear.

TORQUE CONVERTER

MAINSHAFT

2ND GEAR
2ND CLUTCH

MAINSHAFT

SECONDARY

DRIVE GEAR
COUNTERSHAFT

1ST GEAR

ONE-WAY CLUTCH

COUNTERSHAFT

1ST GEAR

SECONDARY DRIVEN GEAR
1ST-HOLD

CLUTCH
COUNTERSHAFT

2ND GEARProCarManuals.com

Electrical Troubleshootin g
Troubleshooting Flowchar t — Vehicl e Spee d Senso r (VSS )
• OB D II Sca n Too l indicate s Cod eP1791 .• Self-diagnosi s indicato r ligh t
blink s fou r times .
Possibl e Caus e
• Disconnecte d vehicl e spee dsensor (VSS ) connecto r• Shor t o r ope n in VS S wir e
• Fault y VS S
Chec k tha t th e speedomete r oper -
ate s correctly .
Doe s th e speedomete r operate ? Refe
r t o sectio n 2 3 fo r vehicl e
spee d senso r (VSS ) test .
Chec k th e VS S Voltage :
1. Tur n th e ignitio n switc h OFF .2. Rais e th e vehicle .3. Shif t th e transmissio n t o
position .
4 . Disconnec t th e A (26P ) an d B
(16P ) connector s fro m th ePCM .5. Tur n th e ignitio n switc h O N (II) .
6 . Rotat e th e fron t whee l an d
chec k fo r th e voltag e betwee n
the B1 3 an d A2 6 terminals .NOTE: Bloc k th e othe r whee lso i t doe s no t tur n o r yo u wil lget incorrec t tes t results . •
Mak e sur e lifts , jack s an d safet y stand s ar e place d properl y (se e sectio n 1 ).
• Se t th e parkin g brak e securely , an d bloc k th e rea r wheels .
• Jac k u p th e fron t o f th e vehicle , an d suppor t i t wit h safet y stands .
Doe s 0 V and approx . 5 V or mor e
appea r alternately ? Chec
k fo r ope n i n th e wir e
betwee n th e B1 3 termina l an d
th e vehicl e spee d senso r (VSS) . I f
wir e i s OK , chec k th e VS S (se e
sectio n 23 ).
Chec k fo r loos e PC M connectors .
I f necessary , substitut e a known -
goo d PC M an d recheck . PC
M CONNECTOR S
Wir e sid e o f femal e terminal s
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Transmission Rang e Switc h (A/ T Gea r Positio n Switch )
Test
Mak e sur e lifts , jacks , an d safet y stand s ar e place d properl y (se e sectio n 1 ).
1 . Rais e th e fron t o f th e vehicle , an d suppor t i t wit h safet y stand s (se e sectio n 1 ).
2 . Se t th e parkin g brake , an d bloc k bot h rea r wheel s securely .
3 . Pul l th e carpe t bac k t o expos e th e secondar y heate d oxyge n senso r (secondar y HO2S ) connector . Disconnec t th e con -
nector , the n pus h it ou t unde r th e vehicl e (se e pag e 14-90 ).
NOTE : Th e secondar y HO2 S connecto r i s unde r th e passenger' s seat .
4 . Remov e th e exhaus t pip e A bracket , the n remov e exhaus t pip e A .
5 . Remov e th e secondar y HO2 S harnes s cover , the n remov e th e thre e wa y catalyti c converter .
6 . Remov e th e hea t shields .
7 . Disconnec t th e transmissio n rang e switc h connector .
TRANSMISSIO N RANG ESWITCH CONNECTO R(10P)
Termina l sid e o f mal e terminal s
8. Chec k fo r continuit y betwee n th e termina l i n eac h switc h positio n accordin g t o th e tabl e below .
• Mov e th e shif t leve r bac k an d fort h withou t pushin g th e shif t leve r a t eac h switc h position , an d chec k fo r continuit y
withi n th e rang e o f it s fre e play .
• I f ther e i s n o continuit y withi n th e rang e o f fre e play , adjus t th e transmissio n rang e switch .
Neutral
Positio n Switc h
Transmissio
n Rang e Switc h
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Replacement
Make sur e lifts , jack s an d safet y stand s ar e place d properl y (se e sectio n 1 ).
1 . Rais e th e fron t o f th e vehicle , an d suppor t i t wit h safet y stand s (se e sectio n 1 ).
2 . Se t th e parkin g brake , an d bloc k bot h rea r wheel s securely .
3. Shif t th e transmissio n to th e position .
4 . Remov e th e clamp , the n disconnec t th e transmissio n rang e switc h connector .
SHIFT CABL ECOVERCLAMP S
TRANSMISSIO N RANG E
SWITC H CONNECTO R
SHIF T SOLENOI D VALVE /
A/ T CLUTC H PRESSUR E
CONTRO L SOLENOI D VALV E
HARNES S CLAM P
TRANSMISSIO N RANG E
SWITC H
SHIFT SOLENOI D VALVE /
A/ T CLUTC H PRESSUR E
CONTRO L SOLENOI D VALV E
HARNES S CONNECTO R
5. Remov e th e clam p fro m th e transmissio n rang e switc h harnes s bracke t o n th e rea r cover .
6 . Remov e th e shif t cabl e cove r mountin g bolts .
7 . Remov e th e shif t solenoi d valve/A/ T clutc h pressur e contro l solenoi d valv e harnes s clam p an d connecto r fro m th e
shif t cabl e cover .
8 . Disconnec t th e shif t solenoi d valve/A/ T clutc h pressur e contro l solenoi d valv e harnes s connector , the n remov e th e
shif t cabl e cove r fro m th e transmission .
9. Remov e th e contro l lever .
10. Remov e th e locknu t an d loc k washer .
11 . Remov e th e transmissio n rang e switch .
LOCKNU T
LOCK WASHE RReplace.
CONTRO L SHAF T
CONTRO L LEVE R
SPRIN G
WASHE R
LOCKNU
T
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NOTES
A Flus h th e AT P coole r an d coole r lin e (se e pag e 14-19 5 an d 14-196 ).
B Se t idl e rp m in gea r t o specifie d idl e speed . I f stil l n o good , adjus t moto r mount s a s outline d i n engin e
sectio n o f servic e manual .
C I f th e larg e clutc h pisto n O-rin g i s broken , inspec t th e pisto n groov e fo r roug h machining .
D I f th e clutc h pac k i s seize d o r i s excessivel y worn , inspec t th e othe r clutche s fo r wea r an d chec k th e orific e
contro l valve s an d throttl e valv e fo r fre e movement .
E I f throttl e valv e i s stuck , inspec t th e clutche s fo r wear .
G I f th e 1- 2 shif t valv e i s stuc k closed , th e transmissio n wil l no t upshift . I f stuc k open , th e transmissio n ha s
n o 1s t gear .
H I f th e 4- 3 shif t timin g valv e i s stuck , inspec t th e 2n d an d 3r d clutc h pack s fo r wear .
I I f th e 3- 4 orific e contro l valv e i s stuck , inspec t th e 3r d an d 4t h clutc h pack s fo r wear .
Imprope r alignmen t o f AT P pum p bod y an d torqu e converte r housin g ma y caus e AT P pum p seizure . Th e
symptom s ar e mostl y a n rpm-relate d tickin g nois e o r a hig h pitche d squeak .
L I f th e ATP straine r i s clogge d wit h particle s o f stee l o r aluminum , inspec t th e AT P pump . I f O K an d n o
caus e fo r th e contaminatio n i s found , replac e th e torqu e converter .
M I f th e 1s t clutc h feedpip e guid e i n th e rea r cove r i s score d b y th e mainshaft , inspec t th e bal l bearin g fo r
excessiv e movemen t i n th e transmissio n housing . I f OK , replac e th e rea r cove r a s i t i s dented . Th e O-rin g
under th e guid e is probabl y worn .
N Replac e th e mainshaf t i f th e bushing s fo r th e Islan d 2n d feedpip e ar e loos e o r damaged . I f th e 1s t feedpip e
i s damage d o r ou t o f round , replac e it . I f th e 2n d feedpip e is damage d o r ou t o f round , replac e th e rea r cover .
0 A worn o r damage d one-wa y (sprag ) clutc h i s mostl y a resul t o f shiftin g th e transmissio n in o r posi -
tio n whil e th e wheel s rotat e i n reverse , suc h a s rockin g th e vehicl e in snow .
P Inspec t th e fram e fo r collisio n damage .
Q Inspec t th e revers e clutc h fo r damag e o r wear .
Inspec t botto m o f 3r d clutc h fo r swir l marks .
Replac e revers e clutc h i f wor n o r damaged . I f transmissio n make s clicking , grinding , o r whirrin g noise ,
als o replac e mainshaf t revers e gear , revers e idle r gear , an d countershaf t revers e gear .
I f botto m o f 3r d clutc h i s swirle d an d transmissio n make s gea r noise , replac e th e countershaft .
R B e ver y carefu l no t t o damag e th e torqu e converte r housin g whe n replacin g th e mai n bal l bearing . Yo u
may als o damag e th e AT P pum p whe n yo u torqu e dow n th e ATP pum p body . Thi s wil l resul t i s AT P pum p
seizur e i f no t detected . Us e th e prope r tools .
S Instal l th e mai n sea l flus h wit h th e torqu e converte r housing . I f yo u pus h i t int o th e torqu e converte r
housin g unti l i t bottom s out , i t wil l bloc k th e flui d retur n passag e an d resul t i n damage .
T Hars h downshift s whe n coastin g t o a sto p wit h zer o throttl e ma y b e cause d b y th e A/ T clutc h pressur e con -
tro l solenoi d valv e no t working .
V Adjustin g th e throttl e valv e body , throttl e valve , an d A/ T clutc h pressur e contro l solenoi d valv e i s essentia l
fo r prope r operatio n o f th e transmission . No t onl y doe s i t affec t th e shif t qualit y i f misadjusted , bu t als o
th e lock-u p clutc h operation .
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Road Tes t
NOTE : War m u p th e engin e to norma l operatin g temperatur e (th e radiato r fa n come s on) .
1. Appl y parkin g brak e an d bloc k th e wheels . Star t th e engine , the n shif t t o positio n whil e pressin g th e brak e pedal .
Pres s th e accelerato r peda l an d releas e it suddenly . Th e engin e shoul d no t stall .
2. Repea t th e sam e tes t i n position .
3. Test-driv e th e vehicl e o n th e fla t roa d in position . Chec k tha t th e shif t point s occu r a t th e approximat e speed s
shown o n th e nex t page . Als o chec k fo r abnorma l nois e an d clutc h slippage .
NOTE : Throttl e positio n senso r voltag e represent s th e throttl e opening .
a . Remov e th e PC M cove r t o expos e th e PC M fo r roa d testing ; refe r t o pag e 14-5 4 an d 14-55 .
b . Se t th e digita l multimete r t o chec k voltag e betwee n D 6 (+ ) termina l an d A2 6 (- ) termina l o f th e PC M fo r th e throttl e
positio n sensor .
NOTE : Refe r t o pag e 14-54 ; Ho w to us e th e Backprob e Set .
SRS component s ar e locate d in thi s area . Revie w th e SR S componen t locations , precautions , an d procedure s in th e SR S
(sectio n 24 ) befor e performin g repair s o r service .
PCM
D6 Termina l
DIGITAL MULTIMETE R(Commercially available )KS - AH M - 3 2 - 003 ,or equivalen t
BACKPROB E SE T07SAZ-001000A(two required )
BACKPROB EADAPTER
STACKIN G PATC H CORD S
A26 Termina l
PCM CONNECTOR S
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Stall Speed

Test

CAUTION:

• To prevent transmission damage, do not test stall speed for more than 10 seconds at a time.

• Do not shift the lever while raising the engine speed.

• Be sure to remove the pressure gauge before testing stall speed.

1. Engage the parking brake, and block the front wheels.

2. Connect a tachometer to the engine, and start the engine.

3. Make sure the A/C switch is OFF.

4. After the engine has warmed up to normal operating temperature (the radiator fan comes on), shift into position.

5. Fully press the brake pedal and accelerator for 6 to 8 seconds, and note engine speed.

6. Allow two minutes for cooling, then repeat the test in and positions.

NOTE:

• Stall speed tests should be used for diagnostic purposes only.

• Stall speed should be the same in and positions.

Stall Speed RPM:

Specification: 2,250 rpm

Service Limit: 2,100 - 2,400 rpmProCarManuals.com

Pressure Testin g
• Whil e testing , b e carefu l o f th e rotatin g fron t wheels .
• Mak e sur e lifts , jack s an d safet y stand s ar e place d properl y (se e sectio n 1 ).
CAUTION :
• Befor e testing , b e sur e th e transmissio n flui d is fille d to th e prope r level .
• War m up th e engin e befor e testing .
1 . Rais e th e fron t o f th e vehicle , an d suppor t i t wit h safet y stands .
2 . Se t th e parkin g brake , an d bloc k rea r wheel s securely .
3. Allo w th e fron t wheel s to rotat e freely .
4. War m u p th e engin e (th e radiator fan come s on) , the n sto p an d connec t a tachometer .
5 . Connec t th e specia l too l t o lin e pressur e inspectio n hole .
TORQUE : 1 8 N- m (1. 8 kgf-m , 1 3 Ibf-ft )
CAUTION : Connec t th e oi l pressur e gaug e securely , b e sur e no t t o allo w dus t an d othe r foreig n particle s t o ente r th e
inspectio n hole .
LINE PRESSUR E
INSPECTIO N HOL E
A/ T OI L PRESSUR E GAUG E
SE T W/PANE L
07406-002040 0
A/T LO W PRESSUR E
GAUG E W/PANE L
07406-007030 0
A/T PRESSUR E HOS E
ADAPTE R
07MAJ-PY4012 0(4 Required )
A/ T PRESSUR E HOSE ,
2210 mm07MAJ-PY4011 A(4 Required )
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