oil pressure ACURA NSX 1997 Service Repair Manual
[x] Cancel search | Manufacturer: ACURA, Model Year: 1997, Model line: NSX, Model: ACURA NSX 1997Pages: 1503, PDF Size: 57.08 MB
Page 349 of 1503
13. Install the injectors and fuel pipe assembly in the manifold.
14. Align the center line on the connector with the mark on the fuel pipe.
15. Install and tighten the retainer nuts.
16. Coat new O-rings with clean engine oil and put them on the fuel hose.
17. Connect the fuel hose to the fuel pipe.
18. Connect the vacuum hose and fuel return hose to the pressure regulator.
19. Install the connectors on the injectors.
20. Install the intake manifold covers.
21. Turn the ignition switch ON (II), but do not operate the starter. After the fuel pump runs for about 2 seconds, the fuel
pressure in the fuel line rises. Repeat this two or three times, then check for leakage.ProCarManuals.com
Page 422 of 1503
VTEC
VTEC Solenoid Valve Inspection
1. Disconnect the 2P connector from the VTEC sole-
noid valve.
2. Measure resistance between the BLU/YEL (front/rear)
terminals and body ground.
BLU/YEL
3. If the resistance is within specifications, remove the
VTEC solenoid valve from the cylinder head, and
check the VTEC solenoid valve filter for clogging.
• If there is clogging, replace the engine oil filter
and engine oil.
VTEC SOLENOID VALVE
VTEC SOLENOID VALVE
FILTER/O-RING
Replace.
4. If the filter is not clogged, push the VTEC solenoid
valve with your finger and check its movement.
• If VTEC solenoid valve is normal, check the engine
oil pressure.ProCarManuals.com
Page 450 of 1503
Rocker Arms and Lost Motion Assemblies
Inspection
NOTE: When reassembling the primary rocker arm, care-
fully apply air pressure to the oil passage of the rocker
arm.
PRIMARY ROCKER ARM
MID ROCKER ARM
SECONDARY
ROCKER ARM
PISTONS
1. Inspect the rocker arm pistons. Push them manually.
— If they do not move smoothly, replace the rocker
arm assembly.
PRIMARY
MID
SECONDARY
Check piston movement
NOTE:
• Apply oil to the pistons when reassembling.
• Bundle the rocker arms with rubber bands to
keep them together as sets.
2. Remove the lost motion assembly from the cylinder
head and inspect it. Pushing it gently with the finger
will cause it to sink slightly. Increasing the force on
it will cause it to sink deeper.
— If the lost motion assembly does not move
smoothly, replace it.
LOST MOTION ASSEMBLYProCarManuals.com
Page 463 of 1503
Reaming
NOTE: Fo r ne w valv e guide s only .
1 . Coa t bot h reame r an d valv e guid e wit h cuttin g oil .
2 . Rotat e th e reame r clockwis e th e ful l lengt h o f th e
valv e guid e bore .
3 . Continu e t o rotat e th e reame r clockwis e whil e
removin g i t fro m th e bore .
4 . Thoroughl y was h th e guid e i n detergen t an d wate r
t o remov e an y cuttin g residue .
5 . Chec k clearanc e wit h a valv e (se e pag e 6-41 ).
— Verif y tha t th e valv e slide s in th e intak e an d exhaus t
valv e guide s withou t exertin g pressure .
REAMER HANDL E VALV
E GUID E
REAMER , 5. 5 m m
07HAH-PJ7010 B
Tur n reame r i n
clockwis e directio nonly.
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Page 505 of 1503
Oil Pressur e
Testing
If th e oi l pressur e warnin g ligh t stay s o n wit h th e engin e
running , chec k th e engin e oi l level . I f th e oi l leve l i s
correct :
1 . Remov e th e engine oil pressur e switch , an d instal l
a n oi l pressur e gauge .
2 . Star t th e engine . Shu t i t of f immediatel y i f th e
gaug e register s n o oi l pressure . Repai r th e proble m
before continuing .
3. Allo w th e engin e t o reac h operatin g temperatur e
(fa n come s o n a t leas t twice) . Th e pressur e shoul d
be:
Engin e Oi l Pressure :
A t Idle : 7 0 kP a (0. 7 kgf/cm2,1 0 psi )
minimu m
A t 3,00 0 rpm : 34 0 kP a (3. 5 kgf/cm
2, 5 0 psi )
minimu m
• I f oi l pressur e i s withi n specifications , replac e th e
oi l pressur e sende r an d recheck .
• I f oi l pressur e i s NO T withi n specifications , inspec t
th e oi l pum p (se e pag e 8-8 ).
ENGIN E OI L PRESSUR ESWITCHMOUNTIN G HOL E
OIL PRESSUR E GAUG EADAPTO R(1/8"-28, BSPT )
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Page 524 of 1503
Expansion Tan k
Cap Testin g
1. Remov e th e expansio n tan k cap , we t it s sea l wit h
engin e coolant , the n instal l i t o n th e pressur e
tester.
2. Appl y a pressur e o f 93-12 3 kP a (0.9 5 - 1.2 5 kgf/cm2,
14-1 8 psi) .
3. Chec k fo r a dro p in pressure .
4 . I f th e pressur e drops , replac e th e cap .PRESSUR E TESTE R
(Commerciall y available )
SMAL L ADAPTO R
(fo r 3 2 m m neck , lo w profile )
EXPANSIO N TAN K
CAP
Testin g
1. Wai t unti l th e engin e is cool , the n carefull y remov e
the expansio n tan k ca p an d fil l th e expansio n tan k
with engin e coolan t t o th e to p of the fille r neck .
2. Attac h th e pressur e teste r t o th e expansio n tank ,
an d appl y a pressur e o f 9 3-12 3 kP a (0.9 5 - 1.2 5
kgf/cm
2, 14-1 8 psi) .
3 . Inspec t fo r coolan t leak s an d a dro p i n pressure .
4 . Remov e th e tester , an d reinstal l th e expansio n tan k
cap.
NOTE : Chec k fo r engin e oi l i n th e coolan t and/o r
coolan t i n th e engin e oil .
PRESSUR E TESTE R
(Commerciall y available )
EXPANSION TAN K
SMAL L ADAPTO R
(fo r 3 2 m m neck , lo w profile )
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Page 573 of 1503
Terminal
number
1
2
3
4
4*
5
6
7
8
9
10
11
12
13
14
15
16
Wire
color
BLU
RED
BLU/BLK
RED
LTGRN
ORN
WHT
ORN/BLU
BLU/GRN
BRN/BLK
GRY
GRN
BLU
ORN/BLU
WHT/BLU
WHT/BLU
BLU/YEL
Terminal name
VTP SWF (FRONT VTEC
PRESSURE SWITCH)
IGN COIL6 (No. 6 IGNITION
COIL part of IGNITION
CONTROL MODULE)
VTP SWR (REAR VTEC
PRESSURE SWITCH)
ATP PN (A/T GEAR
POSITION SWITCH)
NT SW (NEUTRAL
SWITCH)
CYP 2P (CYP SENSOR 2 P
SIDE)
CYP 1P (CYP SENSOR 1 P
SIDE)
CKP 2P (CKP SENSOR 2 P
SIDE)
CKP 1P (CKP SENSOR 1 P
SIDE)
LG2 (LOGIC GROUND)
IGN COIL5 (No. 5 IGNITION
COIL part of IGNITION
CONTROL MODULE)
IGN COIL4 (No. 4 IGNITION
COIL part of IGNITION
CONTROL MODULE)
IGN COILS (No. 3 IGNITION
COIL part of IGNITION
CONTROL MODULE)
CYP 2M (CYP SENSOR 2 M
SIDE)
CYP 1M (CYP SENSOR 1 M
SIDE)
CKP 2M (CKP SENSOR 2 M
SIDE)
CKP 1M (CKP SENSOR 1 M
SIDE)
Description
Detects VTEC pressure switch
signal
Sends ignition pulse
Detects VTEC pressure switch
signal
Detects A/T gear position
switch signal
Detects neutral switch signal
Detects CYP sensor 2
Detects CYP sensor 1
Detects CKP sensor 2
Detects CKP sensor 1
Ground for the ECM control
circuit
Sends ignition pulse
Sends ignition pulse
Sends ignition pulse
Ground for CYP sensor 2
Ground for CYP sensor 1
Ground for CKP sensor 2
Ground for CKP sensor 1
Signal
With engine at low rpm: 0 V
With engine at high rpm:
battery voltage
With ignition switch ON (II): 0 V
With engine running: pulses
With engine at low rpm: 0 V
With engine at high rpm:
battery voltage
In or position: 0V
In any other position: approx. 5 V
In neutral position: 0 V
In any other position: approx. 5 V
With engine running: pulses
With engine running: pulses
With engine running: pulses
With engine running: pulses
Less than 1.0 V at all times
With ignition switch ON (II): 0 V
With engine running: pulses
With ignition switch ON (II): 0 V
With engine running: pulses
With ignition switch ON (II): 0 V
With engine running: pulses
(cont'd)
Wire side of female terminals
NOTE: Standard battery voltage is 12 V.
*: M/T
ECM CONNECTOR B (16P)ProCarManuals.com
Page 713 of 1503
Description
The automatic transmission is a combination of a 3-element torque converter and a triple-shaft electronically controlled
automatic transmission which provides 4 speeds forward and 1 speed reverse. The entire unit is positioned in line with the
engine.
Torque Converter, Gears, and Clutches
The torque converter consists of a pump, turbine, and stator, assembled in a single unit.
They are connected to the engine crankshaft so they turn together as a unit as the engine turns.
Around the outside of the torque converter is a ring gear which meshes with the starter pinion when the engine is being
started. The entire torque converter assembly serves as a flywheel while transmitting power to the transmission main-
shaft. The transmission has three parallel shafts: the mainshaft, the countershaft, and the secondary shaft. The mainshaft
is in line with the engine crankshaft.
The mainshaft includes the 1st and 4th clutches, and gears for 3rd, 4th, reverse, and 1st (3rd gear is integral with the main-
shaft, while reverse gear is integral with 4th gear).
The countershaft includes the 1st-hold and 3rd clutches, and gears for 2nd, 3rd, 4th, reverse, 1st, and parking.
The secondary shaft includes the 2nd clutch and gears for 2nd and 3rd.
The 4th and reverse gears can be locked to the countershaft at its center, providing 4th gear or reverse, depending on
which way the selector is moved.
The gears on the mainshaft and secondary shaft are in constant mesh with those on the countershaft.
When certain combinations of gears in the transmission are engaged by clutches, power is transmitted from the mainshaft
to the countershaft to provide positions.
Electronic Control
The electronic control system consists of the Transmission Control Module (TCM), sensors, a linear solenoid, a shift switch,
and 4 solenoid valves. Shifting and lock-up are electronically controlled for comfortable driving under all conditions.
The TCM is located on the insulator center bulkhead, behind the driver's seat.
Hydraulic Control
The valve bodies include the main valve body, secondary valve body, servo body, regulator valve body, throttle valve
body, lock-up valve body, and the 2nd accumulator body.
They are bolted to the torque converter housing as an assembly.
The main valve body contains the manual valve, 1-2 shift valve, 2-3 shift valve, 3-4 shift valve, relief valve, one-way relief
valve, and oil pump gears.
The secondary valve body contains the 3-2 kick-down valve, clutch pressure control (CPC) valve, 2nd orifice control valve, 3rd
orifice control valve, modulator valve, 4th exhaust valve, servo control valve, 2nd exhaust valve, and 4-3 kick-down valve.
The servo body contains the accumulator pistons and servo valve. The throttle valve body includes the throttle valve B
which is bolted to the servo body.
The regulator valve body contains the pressure regulator valve, lock-up control valve, and cooler relief valve. Fluid from
the regulator passes through the manual valve to the various control valves.
The lock-up valve body contains the lock-up timing B valve and lock-up shift valve. The 2nd accumulator body contains
the accumulator pistons and limited slip differential relief valve.
The torque converter check valve is located in the torque converter housing, under the main valve body.
The 1st, 1st-hold, 3rd, and 4th clutches receive fluid from their respective feed pipes and the 2nd clutch receives fluid from
the internal hydraulic circuit.
Shift Control Mechanism
Input from various sensors located throughout the vehicle determines which shift control solenoid valve the TCM will acti-
vate. Activating a shift control solenoid valve changes modulator pressure, causing a shift valve to move. This pressurizes
a line to one of the clutches, engaging that clutch and its corresponding gear.
Lock-up Mechanism
In position and position in 2nd, 3rd, and 4th, pressurized fluid is drained from the back of the torque converter
through a fluid passage, causing the lock-up piston to be held against the torque converter cover. As this takes place, the
mainshaft rotates at the same speed as the engine crankshaft. Together with hydraulic control, the TCM optimizes the tim-
ing of the lock-up mechanism.
The lock-up valves control the range of lock-up according to lock-up control solenoid valves A and B, and throttle valve B.
When lock-up control solenoid valves A and B activate, modulator pressure changes. The lock-up control solenoid valves
A and B are mounted on the torque converter housing, and are controlled by the TCM.
(cont'd)ProCarManuals.com
Page 776 of 1503
(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
Page 1206 of 1503
A/C Servic e Tip s an d Precaution s
The ai r conditionin g syste m use s HFC-134 a (R-134a ) refrigeran t and polyalkyleneglyco l (PAG ) refrigeran t oil*, whic h are
not compatibl e wit h CFC-1 2 (R-12 ) refrigeran t an d minera l oil . D o no t us e R-1 2 refrigeran t o r minera l oi l i n thi s system , an d
d o no t attemp t t o us e R-1 2 servicin g equipment ; damag e t o th e ai r conditionin g syste m o r you r servicin g equipmen t wil l result .
*DENS O ND-OIL8 :
• P/N 3889 9 - PR 7 - A01 : 4 0 ( 1 1/ 3 fl-oz , 1. 4 Imp-oz )
• P/ N 38897-PR7-A01AH : 12 0 ( 4 fl-oz , 4. 2 Imp-oz )
Onl y us e servic e equipmen t tha t i s U.L.-liste d an d i s certifie d t o mee t th e requirement s o f SA E J221 0 t o remov e R-134 a
from th e ai r conditione r system .
CAUTION : Exposur e t o ai r conditione r refrigeran t an d lubrican t vapo r o r mis t ca n irritat e eyes , nos e an d throat , Avoi d
breathin g th e ai r conditione r refrigeran t an d lubrican t vapo r o r mist .
I f accidenta l syste m discharg e occurs , ventilat e wor k are a befor e resumin g service .
R-134 a servic e equipmen t o r vehicl e ai r conditione r system s shoul d no t b e pressur e teste d o r lea k teste d wit h compresse d air .
Som e mixture s o f ai r an d R-134 a hav e bee n show n t o b e combustibl e elevate d pressure s an d ca n resul t
i n fir e o r explosio n causin g injur y o r propert y damage . Neve r us e compresse d ai r t o pressur e tes t R-134 a servic e
equipmen t o r vehicl e ai r conditionin g systems .
Additional healt h an d safet y informatio n ma y b e obtaine d fro m th e refrigeran t an d lubrican t manufacturers .
1. Alway s disconnec t th e negativ e cabl e fro m th e batter y wheneve r replacin g ai r conditionin g parts .
2 . Kee p moistur e an d dus t ou t o f th e system . Whe n disconnectin g an y lines , plu g o r ca p th e fitting s immediately ; don' t
remov e th e cap s o r plug s unti l jus t befor e yo u reconnec t eac h line .
3 . Befor e connectin g an y hos e o r line , appl y a fe w drop s o f refrigeran t oi l t o th e O-ring .
4. Whe n tightenin g o r loosenin g a fitting , us e a secon d wrenc h to suppor t th e matchin g fitting .
5. Whe n recoverin g th e system , us e a R-134 a refrigeran t Recovery/Recycling/Chargin g System ; don' t releas e
refrigeran t int o th e atmosphere .
6 . Ad d refrigeran t oi l afte r replacin g th e followin g parts :
NOTE :
• D o no t retur n th e oi l t o th e containe r onc e dispense d an d neve r mi x wit h othe r refrigeran t oil s t o avoi d
contamination .
• Immediatel y afte r usin g th e oil , replac e th e ca p o n th e containe r an d sea l i t t o avoi d moistur e absorption .
• D o no t spil l th e refrigeran t oi l o n th e vehicle ; i t ma y damag e th e paint ; i f th e refrigeran t oi l contact s th e paint , was h
i t of f immediately .
Condense r
............... . 1 0 (1/ 3 fl-oz, 0.4 Imp-oz )
Evaporato r .............. . 1 0 (1/ 3 fl-oz , 0. 4 Imp-oz )
Lin e o r hos e ............ . 2 0 (2/ 3 fl-oz , 0. 7 Imp-oz )
Receive r ................... . 1 0 (1/ 3 fl-oz , 0. 4 Imp-oz )
Compresso r ............ . O n compresso r
replacement , subtrac t th e volum e o f oi l draine d
from th e remove d compresso r fro m 16 0 ( 5 1/ 3
fl-oz , 5. 6 Imp-oz) , an d drai n th e calculate d volum e
of oi l fro m th e ne w compressor : 16 0 ( 5 1/ 3
fl-oz , 5. 6 Imp-oz ) — Volum e o f oi l fro m remove d
compresso r = Volum e t o drai n fro m ne w compres -
sor.
CORROSIO N RESISTAN T BOL T
Suctio n hos e an d discharg e hos e
t o A/ C line s ................................. . 2 2 N- m (2. 2 kgf-m , 1 6 Ibf-ft )
Discharg e lin e C
(bot h sides ) .................................. 23 N- m (2. 3 kgf-m , 1 7 Ibf-ft )
Condense r lin e A
(bot h sides ) ................................. . 2 3 N- m (2. 3 kgf-m , 1 7 Ibf-ft )
Condense r lin e C to lef t sid e
condense r .................................... . 1 4 N- m (1. 4 kgf-m , 1 0 Ibf-ft )
Receiver/drye r ............................ . 1 4 N- m (1. 4 kgf-m , 1 0 Ibf-ft ) Receive
r lin e an d suctio n lin e t o heate r
assembl y ..................................... . 2 2 N- m (2. 2 kgf-m , 1 6 Ibf-ft )
Compresso r hos e mountin g
bolt s ............................................. . 2 2 N- m (2. 2 kgf-m , 1 6 Ibf-ft )
Compresso r mountin g
bolt s ............................................. . 2 2 N- m (2. 2 kgf-m , 1 6 Ibf-ft )
Compresso r bracke t
mountin g bolt s ........................... . 4 4 N- m (4. 5 kgf-m , 3 3 Ibf-ft )
Idle r pulle y cente r nu t ................ . 4 4 N- m (4. 5 kgf-m , 3 3 Ibf-ft )
6 m m bol t ................................ . 9. 8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
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