1994 HONDA INTEGRA lock

@ Position
Hydraulic pressure is not applied to the clutches, Power is not transmitted to the countershaJt.
@ Position
Hydraulic pressure is not spplied to the clutches. Power is not transmitted to the countetshaft.
The countersha{t is locked by the parking pawl interlocking the parking gear.
TOROUE CONVERTER
PARKING GEAR
REVERSE SELECTOR
REVERSE GEAR
REVERSE SELECTORHUB
SERVO VALVE/SHIFT FORK SHAFT
14-9

Description
Electronic Control System
Electronic Control System
The electronic control system consists of the Transmission Control Module (TCM), sensors. and 4 solenoid valves. Shift-
ing and lock-up are elect.onically controlled for comfortable driving under all conditions.
The TCM is located below the dashboard, behind the left side kick panel on the driver's side.
Lock-up ControlSolonoid Valvo A
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Lock-up Control
From sensor input signals, the TCM determines whether to turn the lock-up
solenoid valve A and/or B accordingly.
The combination of driving siqnals to lock-up control solenoid valves A and
ON or OFF and activates lock-up control
B is shown in the table below.
Lock-up control Solenoid valve
B
Lock-up condition \
Lock-up OFFOFFOFF
Lock-up, slightONOFF
Lock-up. haltONON
Lock-up. fullONON
Lock-upduring decelerationONDuty operationOFF-ON
Shifl Conrrol
The TCM instantaneously determines which gear should be selected by various signals sent trom sensors. and actuates
the shift control solenoid valves A and B control shitting. Also. a Grade Logic Control System has been adopted to control
shifting in E] position while the vehicle is ascending or descending a slope, or reducing speed.
Shift control solenoid valve
t"*b" ,t"-l
------\B
E,E
('l st)OFFON
(2ndlONON
(3rd)ONOFF
E(4th)OFFOFF
a(2nd)ONON
tr (lst)ONOFF
l-Rl {Reverse)ONOFF
(cont'd)
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. Ascending Contlol
When the TCM determines that the vehicle is climbing a hill in @ position, the system extends the engagement area
of 3rd gear to prevent the transmission Irom frequenrly shitting between 3rd and 4th gears, so the vehicle can run smooth
and have more power when needed.
NOTE: Shift schedules between 3rd and 4th gear are stored in the TCM to enable the transmission to automatically
select the most suitable gear according to the magnitude of a gradient by Fuzzy logic.
. Descending Control
When the TCM determines that the vehicle is going down a hill in @ position. the shift-up speed from 3rd to 4th gear
when the throttle is closed becomes taster than the set speed for tlat road driving to widen the 3rd gear driving area.
This, in combination with engine brake from the deceleration lock-up, achieves smooth driving when the vehicle is
descending.
There are two ascending modes with different 3rd gear driving areas according to the magnitude of a gradient stored in
the TCM.
When the vehicle is in 4th gear, and you are decelerating on a gradual hill, or when you are applying the brakes on a
steep hill, the transmission will downshitt to 3rd gear. When you accelerate the transmission will then return to 4th gear.
F
0
. Deceleration Control
Vohicle SDood
When the vehicle goes around a corner, and needs to decelerate first and then accelerate, the TCM sets the data for
deceleration control to reduce the number of times the transmission shifts to obtain smooth driving. When the vehicle
is decelerating from speeds above 27 mph (43 km/h). the TCM shifts the transmission from 4th to 3rd earlier than normal
to cope with upcoming acceleration to maintain smooth driving.
NOTE:
Fuzzy Logic: Fuzzy logic is a from at artificial intelligence that lets computers respond to changing conditions much like
a human mind would.
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Hydraulic Control
The valve bodies include the main valve body, secondary valve body, regulator valve body, servo body and lock-up valve
body.
The oil pump is driven by splines behind the torque converter which is attached to the engine. Oil flows th.ough the
regulator valve to maintain specified pressure through the main valve body to the manual valve, directing pressure to
each of the clutches,
SHIFT CONTROL SOLEIIOIDVALVE ASSEMBLY
RTGHT SIDE COVER
LOCK.UP VALVE BODY
VALVE BODY
REGULATOR VBODY
SOLENOID VALVEASSEMBLY
4<.__i: )o.-
OIL PUMP GEARS
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Description
Hydraulic Control (cont'dl
Ragularol Valve Body
The .egulator valve body is located on the main valve body. The regulator valve body consists of th€ regulator valva,
toroue converter check valve, cooler check valve, and lock-up contlol valve.
REGULATOR VALVE
REGULATOR VALVEBODY
COOLER CHECK VALVE
LOCT.UP CONTROI. VALVE
TONOUE COI{VERTEBCHECK VALVE
Lock-up Valvo Body
The lock-up valve body with the lock-up shilt valve and lock-up timing B valve is located on th€ regulator volvs body.
LOCK.UP SHIFT VALVE
TIMITG B VALVE
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E Position
As the engine turns, the oil pump also starts to operate. Automatic transmission fluid (ATF) is drawn from (99) and dis-
charged into (1 ). Then, ATF pressure is controlled by the regulator valve and becomes line pressure ( 1 ). The torque con-
verter inlet pressure (92) enters (94) of torque converter through the orifice and discharges into {90}.
The torque converter check valve prevents the torque converter pressure from rising'
Under this condition, the hydraulic pressure is not applied to the clutches.
NOTE:. When used, "left" or "right" indicates direction on the llowchart
. SOL-@: Shift Control Solenoid Valve A
' SOL{D:Shift Control Solenoid Valve B
. SOL@: Lock-up Control Solenoid Valve A
. SOL-@: Lock-up Control Solenoid Valve B
(cont'd)
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Description
Hydraulic Flow (cont'd)
L1l Position
The line pressure {1) becomes line pressure (4) at the manual valve and passes to the lst clutch and 1st accumulator.Then line pressure (41 flows through the 1st-hold clutch and lst-hold accumulator.
Fluid flows by way of:- Line Pressure {4} - 1-2 Shitt Valve * 2-3 Shitt Valve - 3rd Clutch Pressure {31) - 3-4 Shift Valve - 4th ClutchPressure (41) - Manual Valve - lst-hold Clutch Pressure {15) - 1st-hold Clutch
The modulator pressure (6) is supplied to the 1-2 and 2-3 shift valves.The line pressure (1) also flows to throttle valve B.
NOTE:. When used. "left" or "right" indicates direction on the flowchart.. SOL-@: Shift Control Solenoid Valve A. SOL@: Shift Control Solenoid Valve B. SOL-@: Lock-up Control Solenoid Valve A. SOL-@: Lock-up Control Solenoid Valve B
14-30