1996 ACURA RL KA9 ECU

Emission Control System

Evaporative Emission (EVAP) Controls (cont'd)

'00 - 01 models:

From

No. 20 ECU
(PCM)

(20 A) FUSE

(in the under-dash

fuse/relay box)

FUEL TANK VAPOR

RECIRCULATION

TUBE
EVAP

BYPASS

SOLENOID

VALVE
EVAP

CANISTER

FILTER

EVAP

CANISTER

FUEL TANK VAROR

RECIRCULATION

VALVE
EVAP

TWO WAY

VALVE
FUEL TANK
EVAP

CANISTER

VENT SHUT VALVE
EVAP CANISTER

PURGE VALVE
VARIOUS

SENSORS
INTAKE

MANIFOLD

FUEL

TANK

PRESSURE

SENSOR
FUEL TANK

VAPOR CONTROL

VALVE

FUEL

FILL

CAP
FUEL TANK

VAPOR

SIGNAL

TUBEProCarManuals.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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Replacement

NOTE: Torque converter clutch (lock-up control)

solenoid valves A and B must be replaced as an assem-

bly.

1. Remove the mounting bolts and torque converter

clutch solenoid valves A and B.

6 x 1.0 mm

12 N-m

(1.2 kgf-m, 8.7 Ibf-ft)
TORQUE CONVERTER CLUTCH

SOLENOID VALVES

A AND B

FILTER/GASKET

Replace.

Install in this

direction.

Clean mounting surface

and fluid passages

2. Clean the mounting surface and fluid passages of

the torque converter clutch solenoid valves A and B,

and install a new torque converter clutch solenoid

valves A and B with a new filter/gasket.

NOTE: Install the filter/gasket in the direction shown.

3. Check connector for rust, dirt or oil, then reconnect

the connector securely.ProCarManuals.com

Mainshaft/Countershaft Spee d Sensor s
Replacemen t
Make sur e lifts , jacks , an d safet y stand s
ar e place d properl y (se e sectio n 1 ).
1 . 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 . Discon -
nec t th e connector , the n pus h i t ou t unde r th e vehi -
cle.
NOTE : Th e secondar y HO2 S connecto r i s unde r th e
passenger' s seat .
SECONDAR Y HO2 S CONNECTO R
Remove th e exhaus t pip e A bracket , the n remov e
exhaus t pip e A .
BAN D
EXHAUS TPIPE A
TRANSMISSIO NSTOP COLLA R THRE
E WA Y
CATALYTI C
CONVERTE R
SECONDAR Y
HO2SHARNES SCOVER
6 x 1. 0 m m9.8 N- m (1. 0 kgf-m ,
7. 2 Ibf-ft )
3. Remov e th e secondar y HO2 S harnes s cover , the n
remov e th e thre e wa y catalyti c converter . 4
. Remov e th e hea t shields .
6 x 1. 0 m m9.8 N- m (1. 0 kgf-m ,
7. 2 Ibf-ft )
HEATSHIEL D
HEA T
SHIEL D
6 x 1. 0 m m9.8 N- m (1. 0 kgf-m ,
7. 2 Ibf-ft )
5. Plac e a jac k unde r th e transmission , an d rais e th e
transmissio n jus t enoug h t o tak e weigh t of f o f th e
mounts , the n remov e th e bol t securin g th e shif t
cable guid e bracke t an d th e transmissio n beam .
SHIFT CABL E
GUID E BRACKE T
TRANSMISSIO N BEA M
CARPE T
10 x 1.2 5 mm33 N- m (3. 4 kgf-m ,
2 5 Ibf-ft )
Replace .
GASKETReplace .
8 x 1.2 5 mm22 N- m (2. 2 kgf-m ,
1 6 Ibf-ft )
Replace .
10 x 1.2 5 mm54 N- m (5. 5 kgf-m ,
4 0 Ibf-ft )
Replace .
GASKETReplace .
8 x 1.2 5 mm22 N- m (2. 2 kgf-m ,
1 6 Ibf-ft )
Replace .
10 x 1.2 5 m m38 N- m(3.9 kgf-m , 2 8 Ibf-ft )EXHAUS
T
PIP E A BRACKE T
10 x 1.2 5 mm33 N- m (3. 4 kgf-m ,
2 5 Ibf-ft )
Replace .
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O-RING

Replace.
COUNTER-

SHAFT

SPEED

SENSOR

O-RING

Replace.

8. Replace the O-rings with new ones before reassem-

bling the mainshaft and countershaft speed sensors.

9. Install washers on the mainshaft and countershaft

speed sensors, then install the sensors on the trans-

mission housing.
10. Raise the transmission with a jack.

11. Install the transmission beam on the rear transmis-

sion mount bracket/mount, then tighten the four

bolts loosely.

TRANSMISSION BEAM

BOLTS

10 x
1.25
mm

38 N-m (3.9 kgf-m,

28 Ibf-ft)
6 x 1.0 mm

9.8 N-m (1.0 kgf-m,

7.2 Ibf-ft)

SHIFT CABLE

GUIDE BRACKET

TRANSMISSION BEAM BOLTS

10 x
1.25
mm

38 N-m (3.9 kgf-m, 28 Ibf-ft)

12. Tighten the four beam bolts to the specified torque,

then tighten the three inner bolts to the specified

torque.

13. Install the shift cable guide bracket on the transmis-

sion beam.

14. Install the heat shields.

15. Install exhaust pipe A and the three way catalytic

converter, then install the exhaust pipe A bracket.

16. Push the secondary HO2S connector into the vehi-

cle, then secure it with the harness grommet.

17. Install the secondary HO2S harness cover.

18. Connect the secondary HO2S connector.
6. Lower the transmission.

7. Remove the 6 mm bolt from the transmission hous-

ing, and remove the mainshaft and countershaft

speed sensors.

6 x 1.0 mm

12 N-m (1.2 kgf-m, 8.7 Ibf-ft)
MAINSHAFT

SPEED SENSOR

WASHER

WASHERProCarManuals.com

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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18. Install the control lever.

CAUTION: Take care not to bend the shift cable.

SPRING

WASHER

CONTROL SHAFT

19. Connect the shift solenoid valve/A/T clutch pressure

control solenoid valve harness connector.

20. Install the shift solenoid valve/A/T clutch pressure

control solenoid valve harness clamp to the shift

cable cover, then install the shift cable cover onto

the transmission.

CLAMP

SHIFT CABLE

COVER

SHIFT SOLENOID VALVE/

A/T CLUTCH PRESSURE

CONTROL SOLENOID VALVE

HARNESS CONNECTOR
21. Connect the transmission range switch harness

connector, then clamp the harness clamp on the

brackets.

22. Turn the ignition switch ON (II). Move the shift lever

through all gears, and check the transmission range

switch synchronization with the A/T gear position

indicator.

GAUGE ASSEMBLY

A/T GEAR POSITION

INDICATOR

23. If the transmission range switch is not synchronized

with the A/T gear position indicator, loosen the bolts

securing the transmission range switch and adjust

the transmission range switch installation.

24. Start the engine. Move the shift lever through all

gears, and verify the following:

• The shift lever cannot be moved to the position

from the position without pushing the shift

lever.

• The engine will not start in any drive gear, only in

the or position.

• The back-up lights come on when the shift lever is

in the position.
8 x
1.25
mm

16 N-m (1.6 kgf-m, 12 Ibf-ft)

CONTROL

LEVER

6 x 1.0 mm

12 N-m (1.2 kgf-m,

8.7 Ibf-ft)ProCarManuals.com