1998 ACURA INTEGRA Service Repair Manual

IPartial Lock-up
Lock-uo Control Solenoid Valve A: ONLock-uD Control Solenoid Valve B: OFF
The TCM switches solenoid valve A ON to release modulator Dressure in the left cavity of the lock-up shift valve.
Modulator pressure in the right cavity of the lock-up shift valve overcomes the spring force, 8nd the lock-up shift valve is
moved to the left side,
Modulator pressure is separated into the two passages:
Torque Converter Inner Pressure: enters into right side to engage lock-up clutch,
Torque Converter Back Pressure: enters into left side to disengage lock-up clutch.
Back prassure {F2) is regulated by the lock-up control valve whereas the position of the lock-up timing B valve is deter-
mined by the throttle B pressure, tension of the valve spring, and pressure regulated by the modulator. Also the position
of the lock-up control valve is determined by the back prossure of the lock-up control valve and torque converter pressure
regulated by the check valve. With lock-up control solenoid valve B kept OFF. modulator pressure is maintained in the left
end of the lock-up control valve; in other words, the lock-up control valve is moved slightly to the left side. This slight
movement of the lock-up control valve causes the back pressure to be lowered slightly, resulting in partial lock-up.
NOTE: When used, "|eft" or "right" indicates direction on the hydraulic circuit.
LOCK.UP GO TNOLSOLENOIO VAIVE A
TOCK-UP SHIFT VAIVELOCI( UP COI{TROL VAIVE
T
LOC(,UP IM TG g VALV€
MODULATOB PNESSUFE
14-41

Description
I,OCK UP SHIFT VALVE
Lock-up System (cont'dl
Halt Lock-up
Lock-up Control Solenoid Valve A: ONLock-up Control Solenoid Valve B: ON
Modulator pressure is released by solenoid valve B. causing modulator pressure in the left cavity of the lock-up control
valve to lower.
Also modulator pressure in the left cavity of lock-up timing B valve is low. However, throttle B pressure is still low so lock-
up timing B valve is kept on the right side by spring force.
With lock-up control solenoid valve B turned ON, the lock-up control valve is moved somewhat to the left side, causing
back pressure (F2) to lower. This allows a greater amount of fluid (F1) to work on the lock-up clutch to engage the clutch.
Back pressure (F2) which still exists, prevents the clutch from engaging fully.
NOTE: When used, "|eft" or "right" indicates direction on the hydraulic circuit.
LOCK.UP COI\ITBOL
THROITIE B PRESSUREIOCX UP COIITROL VALVE
MODULATOR PNESSURE
TOCK UP TIMING B VALVE
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'Full Lock-up
Lock-up Control Solenoid Valve A: ONLock-uD Contorl Solenoid Valve B:ON
When the vehicle speed further increases, throttle B pressure is increased in accordance with the throttle opening.
The lock-up timing B valve overcomes spring force and moves to the left side. Also, this valve closes the port leading to
the torque convener check valve.
Under this condition, throttle B pressure working on the right end of the lock-up control valve becomes greater than that
on the left end (modulator pressure in the left end has already been released by the solenoid valve B); the lock-up control
valve is moved to the left. As this happens, torque converter back pressure is fully released, causing the lock-up clutch to
be tully engaged.
NOTE: When used, "lelt" or "right" indicates direction on the hydraulic circuit.
LOC( UP CONiBOT
LOCK UP SHIFT VAIVE
MODULATOR PBESSURE
ATF COOLER
I
IOC( UP TIMING B VALVE
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Description
LOCX UP CONTFOLSOLENOIO VAI.VE A
Lock-up System (cont'd)
Deceleration Lock-up
Lock-up Control Solenoid Valve A: ON Lock-up Control Solenoid Valve B: Duty Operation (ON e) OFF)
The TCM switches solenoid valve B ON and OFF rapidly under certain conditions. The slight lock-up and half lock-up
regions are maintained so as to lock the torque converter properly.
NOTE: When used, "|eft" or "right" indicates direction on the hydraulic circuit.
tocK-uP col{TFoLSOTENOID VALV€ B
IOCK-UPCOITTROL VALVE
locK.uP trMrr{G B vAlv€
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Component Locations
"/,4
'JJ-N
{7v
A0t
\ /
t
AUTOMATIC TRANSAXLE IAiTIGEAR POSITION SWITCH
VEHICLE SPEEDSENSOR {VSSt
COUNTERSHAFTSPEED SENSORMAINSHAFT SPEEDSENSORTHROTTLE POSITIOT{ {TPI
e
SHIFT CONTROLSOLENOID VALVE A/BASSEMBLY
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1445

Circuit Diagram
UNDER.HOOD FUSE/BELAY BOX
No.41 (100A1 No.47 (7.5A)
\'
WHT/BLU
423
LTGRN/BLK
I
GRNI/VHT
GRN/RED
GRN
GBN/BI"K
GRN/8LU
GRN/YET
LT GRN,M/HT
NoTE: I :To5v
T :1o 12v
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GAUGE ASSEMBTY
AiT GEAR POSITIONINOICATOR
To lzv lGl
rRANsMrssroN coNTRoL M.DULE rrcMr -fu
*> =
g
=.
I f- J:*
rrppr lo+rlo lru lrrpn tflt ti]t lrrezlerer
5VFEGULATOR
F- GRN/BLU
l--- GRN/YEL
l-- t"T GRN,aWHT
'v

'.J
THROTTLErcsm0NSENSOR
ENGINECOOLANTTEMPERATURESENSOR
WHT/BLKBLK/RED
820424
OBNREO/BLK
84
J
MAINSHAFI COUNTERSHAFISPEED SENSOR SPfED SENSOR
I SHIFT CONTROL I LOCK -UP CONTBOL
+135Eil,?1o'uo'u' 4i85El,o''P'uo'u'
TCM T6nninal locations
TCM -B l22P)Conn€ctor
VREF IATCHK IBASOSS IAFSA IAFSB IFAS ISCS
----T;- t-T-*
+.. | +.., I + ,+
l+ | J l/vt-l .i{-'1M-l L-{-lr^/t-lt't'/!-?
*\::
r--rr!\.1 -r!\./ rartsurssrot coNTFoL M'DULE tTcMr
ltEltn r' -rrt= t= t? t=
NMSG INC INCSG ISH A ISH B ILC A ILC B
576I101112578I10
151617,/1,/20251214,/1,/171920,/1,/J
TCM -A (26P1 Connector
14-47

TCM Terminal Voltage/Measuring Conditions
A l26Pl ConnectorB (22PlConnector
TCM Terminal Locations
256789'1011132351II10
11,/l/2024261214,/l/1120,/1,/
T6rminal NumberSignalDescriptionMeasuring Conditions/T€rminal Voltag€
A'INot used
A2
SHBShift control solenoid valve B
control
In 1st and 2nd gear in E anO E positions and
E position: Battery voltage
ln E position,3rd and 4th gear in E anO Epositions:0 V
SHAShift control solenoid valve A
control
In E, E positions,2nd and 3rd gear in E and
E positions: Batteryjloltage
In lst gear in !d and -qtl positons and 4th gear
in E oosition: 0V
A4Not used
A5NEEngine speed signal inputWhen engine is rotating: Pulsing signal
ATPlA,/T gear position switch
E position input
In L!-l position: 0 V
In other than I position: Battery voltage
A7ATP2Ay'T gear position switch
E position input
In 13 position:0 V
In other than E position: Battery voltage
A8ATP D3A,/T gear position switch
E position input
In E position:0V
In other than @ position: Battery voltage
A9ATP D4A,/T gear position switch
E position input
InEposition;0V
In other than El position: Battery voltage
410ATP PNA,/T gear position switch
E and E positions input
InEorEpositions:OV
In other than E or N position: Battery vottage
411ATP RA/T gear position switch
E position input
lnEposition: oV
ln other than E position: 8attery voltage
412tGlPower supply systemWith ignition switch ON (lll: Battery voltage
413LG1Ground
A14Not used
A15LCBLock-up control solenoid valve B
control
During hall and full lock-up and during deceler-
ation: Battery voltage
During no lock-up:0 V
A16LCALock-up control solenoid valve A
control
When lock-up is ON; Battery voltage
With no lock-up: 0 V
417D4 INDD4 Indicator light controlWhen ignition switch is first turned ON (ll):
Battery voltage for two seconds
In E position: Battery voltsge
A18Not used
A19Not used
420AT CHKUpshifvdownshift comparative
signal output
With ignition switch ON (ll): Pulsing signal
421Not used
422ILUInterlock controlWhen ignition switch is ON (ll), brake pedal
deoressed and accelerator oedal released:
Battery voltage
423VBUBack-up power systemAlways Battery voltage
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