engine ACURA NSX 1997 Service Repair Manual

ATF Cooler

The radiator is mounted at the front of the vehicle. The ATF cooler is installed directly on the transmission housing. The

ATF is cooled by the engine coolant.ProCarManuals.com

LOCK-UP CONTROL SOLENOID

VALVE ASSEMBLY

MAINSHAFT SPEED SENSOR

LINEAR SOLENOID
ENGINE COOLANT TEMPERATURE (ECT)

SENSOR

THROTTLE POSITION (TP)

SENSOR

COUNTERSHAFT SPEED

SENSOR
SHIFT CONTROL SOLENOID

VALVE ASSEMBLY

VEHICLE SPEED SENSOR (VSS)

TRANSMISSION CONTROL

MODULE (TCM)

TCS CONTROL UNIT

ENGINE CONTROL MODULE

(ECM)ProCarManuals.com

Road Tes t
positio n
SR S component s ar e locate d in thi s area . Revie w th e SR S componen t locations , precautions , an d procedure s i n th e SR S
( sectio n 24 ) befor e performin g repair s o r service .
1 . Appl y parkin g brak e an d bloc k th e wheels . Star t th e engine , an d war m u p th e engin e t o norma l operatin g temperatur e
(th e coolin g fa n come s on) . (Whe n th e engin e coolan t temperatur e i s belo w norma l operatin g temperature , th e shif t
point i s highe r tha n specifie d vehicl e speed. ) Shif t t o positio n whil e depressin g th e brak e pedal . Depres s th e acceler -
ato r pedal , an d releas e it suddenly . Th e engin e shoul d no t stall .
2 . Chec k tha t th e shif t point s o n a fla t roa d occu r a t th e approximat e speed s show n 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 .
-1 . Remov e th e sea t bac k panel s (se e sectio n 20 ).
-2 . Remov e th e connecto r holde r fro m th e TC S contro l unit , an d disconnec t th e antenn a lead . The n remov e th e TC S
contro l uni t (se e pag e 14-52 ).
NOTE : D o no t disconnec t th e TC S contro l uni t connectors .
-3 . Remov e th e TC M an d tur n it over .
- 4 . Se t th e digita l multimete r t o chec k voltag e betwee n th e B 4 (+ ) termina l an d A1 3 (- ) o r A2 6 (- ) termina l o f th e TC M
fo r th e throttl e positio n sensor .
BACKPROB E SE T07SAZ-001000 A(Two required )
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Upshift

Downshift

3. Accelerate to about 35 mph (57 km/h) so the transmission is in 4th, then shift from position to position. The vehi-

cle should immediately begin slowing down from engine braking.

CAUTION: Do not shift from position to position at speeds over 76 mph (123 km/h) or from position to posi-

tion at speeds over 45 mph (73 km/h); you may damage the transmission.

4. Check for abnormal noise and clutch slippage in the following positions.

(1st Gear) Position

Accelerate from a stop at full throttle. Check that there is no abnormal noise or clutch slippage.

Upshifts should not occur in this position.

(2nd Gear) Position

Accelerate from a stop at full throttle. Check that there is no abnormal noise or clutch slippage.

Upshifts and downshifts should not occur in this position.

(3rd Gear) Position

Shift to position, then start the car in 1st or 2nd gear and shift to 3rd gear with the shift switch.

Accelerate at full throttle. Check that there is no abnormal noise or clutch slippage.

(Reverse) Position

Accelerate from a stop at full throttle, and check for abnormal noise and clutch slippage.

5. Test in (Parking) Position.

Park the vehicle on a slope (approx. 16°) and apply the parking brake, then shift into position. Release the brake; the

vehicle should not move.ProCarManuals.com

Test
Stal l Spee d
CAUTION :
• T o preven t transmissio n damage , d o no t tes t stal l spee d fo r mor e tha n 1 0 second s a t a time .
• D o no t mov e th e shif t leve r whil e raisin g th e engin e speed .
• B e sur e to remov e th e pressur e gaug e befor e testin g stal l speed .
1 . Engag e th e parkin g brak e an d bloc k al l fou r wheels .
2 . Connec t a tachomete r t o th e engine (or us e th e PG M Tester) , the n star t th e engine .
3 . Mak e sur e th e A/ C switc h is OFF .
4. Afte r th e engin e ha s warme d u p to norma l operatin g temperatur e (th e coolin g fa n come s on) , shif t int o position .
5 . Full y depres s th e brak e peda l an d accelerato r fo r 6 to 8 seconds , an d not e engin e speed .
6. Allo w 2 minute s fo r cooling , the n repea t sam e tes t i n positions .
NOTE:
• Stal l spee d test s shoul d b e use d fo r diagnosti c purpose s only .
• Stal l spee d shoul d b e th e sam e in positions .
Stal l Spee d RPM : Specification : 2,10 0 rp m
Servic e Limit : 1,95 0 - 2,25 0 rp m
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Checking/Changing
Fluid Leve l
Checkin g
NOTE : Chec k th e flui d leve l wit h th e engin e a t nor -
ma l operatin g temperatur e (th e coolin g fa n come s
on).
1. Par k th e vehicl e o n leve l ground . Tur n of f th e engine .
2 . Remov e th e dipstic k (yello w loop ) fro m th e trans -
mission , an d wip e it wit h a clea n cloth .
NOTE : Chec k th e transmissio n flui d 6 0 to 9 0 second s
afte r shuttin g of f th e engine .
3 . Inser t th e dipstic k int o th e transmission .
4 . Remov e th e dipstick , an d chec k th e flui d level . I t
shoul d b e betwee n th e uppe r an d lowe r marks .
5 . I f th e leve l i s belo w th e lowe r mark , pou r th e recom -
mende d fluid * int o th e tub e t o brin g i t t o th e uppe r
mark.
6. Inser t th e dipstic k bac k int o th e transmission .
Changing
1. Brin g th e transmissio n u p t o operatin g temperatur e
b y drivin g th e vehicle . Par k th e vehicl e o n leve l
ground , tur n th e engin e off , the n remov e drai n
plug .
2 . Reinstal l th e drai n plu g wit h a ne w washer , the n
refil l th e transmissio n wit h th e recommende d fluid *
t o th e ful l mar k o n th e dipstick .
Automati c Transmissio n Flui d Capacity :
2. 9 (3. 1 U S qt. , 2. 6 Imp . qt. ) a t chang e
7. 0 (7. 4 U S qt. , 6. 2 Imp . qt. ) afte r overhau l
6.3 (6. 7 U S qt. , 5. 5 Imp . qt. ) afte r overhau l
wit h ne w torqu e
converter .
Recommende d Automati c Transmissio n Fluid
Genuin e Hond a Premiu m Formul a Automati c
Transmissio n Flui d (ATF) *
*Alway s us e Genuin e Hond a Premiu m Formul a
Automati c Transmissio n Flui d (ATF) .
Usin g a non-Hond a AT F ca n affec t shif t quality .
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• Whil e testing , b e carefu l o f th e rotatin g rea r wheels .
• Mak e sur e lift 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 u p th e engin e befor e testing .
1 . Rais e th e vehicl e (se e sectio n 1 ).
2 . War m u p th e engine , the n sto p th e engin e an d con -
nec t a tachometer .
3 . Connec t a pressur e gaug e t o eac h inspectio n hole .
18N-m(1.8kgf-m,13lbf-ft )
CAUTION: Connec t th e pressur e gaug e securely ;
b e sur e no t t o allo w dus t an d othe r foreig n parti -
cle s t o ente r th e inspectio n hole .
A/T OI L PRESSUR E A/ T OI L PRESSUR E
GAUG E SE T W/PANE L HOSE , 221 0 m m
07406-002040 0 07MA J - PY4011 A(4 Required )
A/ T LO W PRESSUR E A/ T OI L PRESSUR E
GAUG E W/PANE L HOS E ADAPTE R
0740 6 - 007030 0 07MA J - PY4012 0
( 4 Required )
4. Star t th e engine , an d measur e th e respectiv e pres -
sur e a s follows .
• Lin e Pressure/Clutc h Pressur e
• Clutc h Low/Hig h Pressur e
• Throttl e B Pressur e
5 . Instal l a ne w washe r an d th e sealin g bol t i n th e
inspectio n hole , an d tighte n to th e specifie d torque .
Torque : 1 8 N- m (1. 8 kgf-m , 1 3 Ibf-ft )
NOTE : D o no t reus e ol d aluminu m washers . •
Lin e Pressure/Clutc h Pressur e Measuremen t
1 . Allo w th e rea r wheel s t o rotat e freely .
2 . Ru n th e engin e a t 2,00 0 rpm .
3 . Shif t th e shif t leve r a s show n o n th e char t o n
th e nex t page .
4 . Measur e eac h clutc h pressure .
While testing , b e carefu l o f th e rotat -
in g rea r wheels .
Pressur e Testin g
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(cont'd)
Pressure Testing

• Clutch Low/High Pressure Measurement

While testing, be careful of the rotating

rear wheels.

1. Allow the rear wheels to rotate freely.

2. Start the engine and let it idle.

3. Shift to position.

4. Slowly press down the accelerator pedal to increase

engine rpm until pressure is indicated on the oil

pressure gauge. Then release the accelerator pedal,

allowing the engine return to an idle, and measure

the pressure reading.
5. With the engine idling, press down the accelerator

pedal approximately 1/2 of its possible travel and

increase the engine rpm until pressure is indicated

on the gauge. Note the highest pressure reading

obtained.

6. Repeat steps 4 and 5 for each clutch pressure being

inspected.ProCarManuals.com

• Throttle B Pressure Measurement

While testing, be careful of the rotat-

ing rear wheels.

1. Allow the rear wheels to rotate freely.

2. Disconnect the linear solenoid connector.

3. Shift to position.

4. Run the engine at 2,000 rpm.

5. Measure fully opened throttle B pressure.

6. Connect battery voltage to the linear solenoid

terminal of the connector.

7. Measure fully closed throttle B pressure.ProCarManuals.com

20. Remove the intermediate shaft heat shield cover and the intermediate shaft mounting bolts.

21. Pry the intermediate shaft out of the differential. Pull and remove it.

NOTE:

• Coat all precision finished surfaces with clean engine oil.

• Tie a plastic bag over the intermediate shaft end.
Removal (cont'd)
Transmission

22. Remove the parking brake cable holder and the wheel sensor wire clamp.

23. Make a reference mark on the flange of the adjusting bolt, adjusting cam and lower control arm.

24. Separate the toe control arm from the side beam.

25. Remove the damper fork bolt.

26. Separate the lower control arm from the side beam.

27. Pry the left driveshaft out of the differential. Pull and remove it.

NOTE:

• Coat all precision finished surfaces with clean engine oil.

• Tie a plastic bag over the driveshaft end.ProCarManuals.com