Oil pressure HONDA INTEGRA 1994 4.G Owner's Guide

Description
Lock-up System
Lock-up Clutch
1. Operation (clutch on)
With the lock-up clutch on, the oil in the chamber between the torque convener cover and lock-up piston is discharged,and the converter oil exerts pressure through the piston against the converter cover. As a result, the converter turbineis locked on the converter cover firmly. The etfect is to bypass the converter, thereby placing the car in direct drive.
tpowefJlo-wl
The power tlows by way of:
Engine
I
Drive plate
I
Torque convener cover
I
Lock-up piston
I
Damper spring
I
Turbine
t
Mainshaft
TOROUE CONVERTERCOVER
LOCK-UP
TURBINE
To oil cooler
2. Operation (clutch off)
With the lock-up clutch off, the oil tlows in the reverse of CLUTCH ON. As a result, the lock-up piston is moved away
from the converter cover; that is, the torque converter lock-up is released.
Fowtttowl
Engine
I
Drive plate
I
Torque converter cover
Pump
I
Turbine
I
Mainshaft
OUTLET
t
,\
TURBINE
14-38

In E position in 2nd, 3rd and 4th, and @ position in 3rd, pressurized fluid is drained from the back of the torque con-
verter through an oil 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 op-
timized the timing ot the lock-up system. Under certain conditions, the lock-up clutch is applied during deceleration, in
3rd and 4th sDeed.
The lock-up system controls 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. Lock-up control solenoid valves
A and B are mounted on the torque converter housing, and are controlled by the TCM.
NOTE:
When used, "left" or " tight" indicates direction on the tlowchart.
LOCK IJP COIITBOL
Solenoid valve
L""f."p "."aiti""\B
Lock-up OFFOFFOFF
Lock-up, slightONOFF
Lock-up, halfONON
Lock-up. fullONON
Lock-up
during decelerationONDuty operation
OFF -ON
LOCI( UP TIMII{G B VAIVE
{cont'd)
ott coot€R
14-39

Full Lock-uo
Lock-up Control Solenoid Valve A: ON Lock-up Control Solenoid Valve B: ON
When the vehicle speed fufther increases, the throttle B pressure is increased in accordance with the throttle opening.
The lock-up timing B valve overcomes the spring force and moves to the left side. Also, this valve closes the oil port
leading to the torque converter check valve.
Under this condition, the 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 lelt end has already been released by the solenoid valve B); i.e., the lock-up
control valve is moved to the left. As this happens, the torque convener back pressure is released fully, causing the
lock-up clutch to be engaged fully.
NOTE: When used, "left" or "right" indicates direction on the tlowchart.
LOC( UP COi{TAO!toc( uP coNtnolSOIENOID VAIVE B
THRO]TIE A PFESSURE
PNESSUFE
FEGUTATOF VAIVE
LOCK-UP TIMIIIG B VALVE
(cont'd)
orl cootER
14-43

Number of @indicator light
blinks while
Service Check
Connector is
connected with
the special tool.
@ indicator
lightPossible CauseSymptomRefer to
page
'loBlinksDisconnected engine coolant tempera-
rure (ECT) sensor connector
Short or open in ECT sensor wire
Faulty ECT sensor
Lock-up clutch does not
engage.14-68
1lOFFDisconnected ignition coil connector
Short or open in ignition coil wire
Faulty ignition coil
. Lock-up clutch does not
engage.'t 4-7 0
13Blinks. Shon or open in LT GRN wire between
the D3 terminal and ECM. Faulty barometric pressure {BARO)
sensor
NOTE: The BARO sensor is built into
the ECM
. No specific symptom
appears.
14-7 1
14Blinks. Short of open in FAS {YEL} wire be-
tween the D16 terminal and ECM. Faulty ECM
. Transmission jerks hard
when shitting.
't5OFFDisconnected mainshaft speed sensor
connecror
Short or open in mainshaft speed sen-
sor wire
Faulty mainshaft speed sensor
. Transmission jerks hard
when shifting.
14-75
SymptomProbable CauseRet.page
LQ! indicator light is on steady, not blinking whenever the ignition is on.14-77
[Q3] indicator light does not come on for 2 seconds after ignition is first
turned on.14-78
Lock-up clutch does not have duty operation (ON-OFFI.Check A/C signal with
A/C on.14-80Lock-up clutch does not engage.
Shitt leve. cannot be moved lrom @ position with the brake pedal
depressed.Check brake switch signal,14-41
It the self-diagnosis LQ4 indicator light does not blink, perform an inspection according to the table below.
a lf a customer describes the symptoms for codes 3, (yet the LQ! indicator light is not blinkingl, 6, 1 1 or 15, it will
be necessa.y to recreate the symptom by test driving. and then checking the @ indicator light with the ignition still
oN.
e lt ttre @ indicator light displays codes olher than those listed above or stays lit continuously, the TCM is faulty.. Sometimes the Lqd indicator light and the Malfunction Indicator Lamp (MlL)/Check Engine light may come on simul-taneously. lf so, check the PGM-Fl system according to the numbe. of blinks on the MIL/Check Engine light. thenreset the memory by removing the BACK UP fuse in the unde.-hood fuse/relay box for more than 1O seconds. Drive
the vehicle for several minutes at speed over 30 mph (5O km/h), then recheck the MIL/Check Engine light.
NOTE:
. PGM-FI system
The PGM-Fl system on this model is a sequential multiport fuel injection system.a Disconnecting the BACK UP luse also cancels the radio anti-theft code. preset stations and the clock setting. Get
the fuse so vou can reset them.the customer's code number and make note ot the radio
14-51

PROBABLE CAUSE
1Shitt cable broken/out of adiustment.
Throttle cable too short.
Throttle cable too long.
Wrong type ATF.
ldle rpm too low/high.
o.Oil pump worn or binding.
7.Pressure regulator stuck.
8.l st clutch detective.
9.2nd clutch detective.
10.3rd clutch defective.
114th clutch defective.
12.1 st'hold clutch defective.
13.Mainshatt worn/damaged.
14.Modulator valve stuck.
Throttle valve B stuck.
lo.ATF strainer clogged.
Toroue converter def ective.
18.Torque converter check valve stuck.'I 9.1-2 shift valve stuck.
2-3 shift valve stuck.
213-4 shift valve stuck.
Servo control valve stuck.
23.Clutch Dressure control (CPC) valve stuck.
2-3 orifice control valve stuck.
Orifice control valve stuck.
26.3-2 kick-down valve stuck.
27.4-3 kick-down valve stuck.
24.4th exhaust valve stuck.
29.1st accumulator detective.
30.2nd accumulator detective.
313rd accumulator defective.
4th accumulator defective.
1 st-hold accumulator defective.
Servo valve stuck.
35.Lock-up timing B valve stuck.
36.Lock-up shift valve stuck.
37.Lock-uo control valve stuck.
38.Shift fork benr.
39.Reverse gears worn/damaged (3 gears).
40.Reverse selectot worn.
413rd gears worn/damaged (2 gears).
Final qears worn/damaged (2 gearsl.
43.Differential Dinion shatt worn.
44.Feedpipe O-ring broken.
45.4th qears worn/damaged (2 gearsl
Gear clearance incorrect.
47.Clutch clearance incorrect.
48.One-way (sprag) clutch defective.
49.Sealinq rings/quide worn.
50.Axle-inboard joint clip missing.

NOTES
A.See flushing procedure, page l4-168 and 169.
B.Set idle rpm in gear to specitied idle speed. lf still no good, adiust motor mounts as outlined in engine
section of service manual.
lf the large clutch piston O-ring is broken, inspect the piston groove for rough machining.
lf the clutch pack is seized or is excessively worn, inspect the other clutches Jor wear, and check the
orifice control valves and throttle valves for free movement.
E.It throttle valve B is stuck, inspect the clutches for wear.
lf the 1-2 shift valve is stuck closed, the transmission will not upshift. lI stuck open, the transmission
has no lst gear.
H.lf the 2-3 orifice control valve is stuck, inspect the 2nd and 3rd clutch packs for wear.
ll the orifice cont.ol valve is stuck, inspect the 3rd and 4th clutch packs for wear.
lf the clutch Dressure control valve is stuck closed, the transmission will not shilt out of 1st gear.
K.improper alignment or main valve body and torque converter housing may cause oil pump seizure. The
symptoms ale mostly an rpm-related ticking noise or a high-pitched squeak.
L.ll the ATF strainer is ctogged with panicles of steel or aluminum, inspect the oil pump and ditferential
pinion shaft. lt both are OK and no cause lor the contamination is found, replace the torque converter.
M.lf the 1st clutch feedpipe guide in the right side cover is scored by the mainshaft, inspect the ball bear-
ing for excessive movement in the transmission housing. lf OK. replace the right side cover as it is dent-
ed. The O-ring under the guide is probably worn.
N.ReDlace the mainshstt if the bushing for the 4th feedpipe is loose or damaged.
It the 4th feedpipe is damaged or out ot tound, replace the right side cover'
Replace the subjshaft it thtbushing for the 1st-hold Jeedpipe is loose or damaged.
lf the 1st-hold feedpipe is damaged or out of round, replace it.
Replace the mainshaft if the bushing lor the 1st feedpipe is loose or damaged.
lf the lst feedpipe is damaged or out ot round, replace it.
o.A *o- r, da."s"d "p-g clutch is mostly a result of shifting the transmission in El or Lq! position
while the wheels rotate in reverse, such as rocking the car in snow.
P.InsDect the frame for collision damage.
o.Inspect for damage or wear:
1. Reverse selector gear teeth chamfers.
2. Engagement teeth chamters of countershaft 4th and reverse gear.
3. Shift fork for scutt marks in center.
4. Differential Dinion shaJt for wear under pinion gears.
5. Bottom of 3rd clutch for switl marks.
Replace items 1 , 2, 3 and 4 it worn or damaged. lf transmission makes clicking, grinding or.whirring
noise, atso replace mainshaft 4th gear and reverse idler gear and countershaft 4th gear in addition to
1,2,3ot4.lf ditiersntial Dinion shaft is worn, overhaul differential assembly, and replace ATF strainel, and thoroughly
clean transmission, tlush torque convertet, cooler and lines.
lf bottom of 3rd clutch is swirled and transmission makes gear noise, replace the countershaft and tinal
driven gear.
R.Be wry careful not to dsmage the torque converter housing when replacing the main ballbearing. You
may al;o damage the oil pump when you torque down the main valve body. This will result in oil pump
seizure it not detected. Use proper tools.
qInstall the main seal tlush with the torque converter housing, lf you push it into the torque converter
housing until it bottoms out. it will block the oil return passage and result in damage.
T,Harsh do\/vnshiJt"\./l,'hen coasting to a stop with zero th.ottle may be caused by a bent-in throttle valve
retainer/cam stopper. Throttle cable adjustment may clear this problem.
ifuitle cable adjustment is essential for proper operation of the transmission. Not only does it affect
the shift points if misad,usted, but also the shift quality and lock-up clutch operation'
A cable adjusted too long will result in throttle pressure being too low for the amount of engine torque
input into ihe trsnsmission and may cause clutch slippage. A cable adjusted too short will result in too
hi;h throttle pressure which may cause harsh shitts, erratic shrfts and torque con
14-89

Stall Speed
CAUTION:
a To plevent transmission damage, do not test stall speed fot mote than 1O seconds at a time.a Do not shift the level while raising th€ engine speed.a Be sure to remove the pressure gauge belot€ testing stall speed.
1. Engage the parking brake and block all four wheels.
2. Connect the tachometer, and start the engine.
3. Make sure the A/C switch is OFF.
4. After the engine has warmed up to normal operating temperature (the cooling lan comes on), shift into ft position.
5. Fully depress the brake pedal and accelerator for 6 to 8 seconds. and note engine speed.6. Allow 2 minutes for cooling, then repeat the test in [, fDil and @ positions.
NOTE:
a Stall speed tests should be used lor diagnostic purposes only.. Stall speed should be the same in E, tr. tr and @ positions.
Stall Speed RPM: rpm
Specification: 2,400 rymService Limit: 2,2OO-2,600 tpm
TROUBLEPROBABLE CAUSE
Stall rpm hish in E, E, I and @posrtronLow fluid level or oil pump output
Cloqged ATF strainer
Pressure regulator valve stuck closed
Slipping clutch
Stall rpm high in I positionSlippage of 1st clutch, 1st-hold clutch or 1st gear one-way clutch
Stall rpm high in @ positionSlippage of 2nd clutch
Stall rpm high in @ positionSlippage of 1st clutch, lst gear one-way clutch
Stall rpm high in @ positionSlippage of 4th clutch
Stall rpm low in E, E, I ana @positionEngine output low
Torque converter one-way clutch slipping
14-92

Pressure Testing
a While testing, be caretul of the rotating flont wheels.a Make aura litts, jacks, and sat€ty stands alo placedplop6rly {see section 1}.
CAUTION: Betore t€sting, be sure the transmission fluidis tilled to rh6 ploper l€vet.
1. Raise the car (see section i),
2. Warm up the engine {the cooling fan comes onl, thenstop the engine and connect a tachometer.
3. Connect the oil pressure gauge to each inspectionholels).
TOROUE: 18 N.m (1.8 kgf.m, 13 tbf.fr)
CAUTION: Connect ths oil prsssure gauge s€cur€_ly; be sule not to allow dust and other foleign pani_cl6s to 6nt€1 th€ inspection holo.
A/T OIL PRESSURE GAUGESET WPANEL07406-002oi+oo
A/T LOW PRESSUREGAUGE W/PANEL07/rO6-0O70300
A/T OIL PRESSURE HOSE,22'10 mmOTMAJ_PY4OI TA{4 Roquirod)
A/T OIL PRESSUBE HOSEADAPTEROTMAJ - PY/+O12014 Roqui.odl
NOTE: Use the A/T Oil Pressure Gauge Set (07406_O02OOO3) or A/T Low Pressure Gauge (07406-OOTO0OO). and the oil pressure gauge hoses and adap_ters shown above.
14-94
4. Start the engine, and measure the respective pres-
sure as follows.
a Line Pressure
a Clutch Pfessure
a Clutch Low/High Pressure
a Throttle B Pressure
5. Install a new washer and the sealing bolt in the in-spection hole and tighten to the specified torque.
TOROUE: 18 N'm {1.8 kgf.m, 13 tbf.ft)
NOTE: Do not reuse old aluminum washers.
a Line Pressure M€asurement
- 1 . Set the parking brake and block both rear wheelssecurely.
-2. Run the engine at 2,OOO rpm
-3. Shift the selecr lever to S or @ position.
-4. Measure line pressure.
LINE PRESSUREINSPECTION HOLE
NoTE: Higher pressures may be indicated it measurements are made in selector positions other than @ or @ position.
PRESSURESELECTOR
POStTTONSYMPTOMPROBABLE CAUSEFLUID PRESSURE
StandardService Limit
LineNo'ENo (or low)
lrne pressureTorque converter,
orl pump, pressure
regulator, to.que
convener check
valve
83O-88O kPa(8.5-9.O kgf/cm,,
120- I 30 psi)
78O kPa
{8.0 kgl/cm,, 1lO psi}

Pressure Testing
(cont'dl
a Clutch Low/High P.essure Measuroment
@[ wtite resring. b€ calefut ot tha loraringflont wh66ls.
- 1. Allow the front wheels to rotate freely.
-2. Remove the cable end of the throttle control cable
from the throttle control lever.
NOTE: Do not loosen the locknuts. simplv unhookthe cable end.
CAALE END
-3. Start the engine and let it idle.
-4. Shitt the select leve. to E position.
-5. Slowly move the throttle linkage to increase enginerpm until pressure is indicaied on the oil oressuregauge.
Then release the throttle linkage, allowing the en-grne to return to an idle, and measure the Dressureresding.
14-96
-6. With the engine idling, lift the throttle control lever
up approximately 1/2 of its possible travel and in-
crease the engine rpm until pressure is indicated
on the gauge, then measure the highest pressure
reading obtained.
- 7. Repeat steps 5 and 6 for each clutch pressure be-
ing inspected.

Pressure Testing
(cont'dl
a Throttle B Ptsssure Measuremcnt
@@ wrril" resring, be caretut ot rhe rotaringfront wheels.
1. Allow the front wheels to rotate treelv.-2. Remove the cable end of the throttle controlcablefrom the throttle control lever.
NOTE: Do not loosen the locknuts, simply unhookthe cable end.
3. Shift the selector lever to @ or @ position.-4. Run the engine at 1,OOO rpm-5. Measure full-closed throttle B pressure.-6. Move the throttle control lever to full-opened throt-tle position.-7. Measure full-opened throttle B pressure.
PRESSURESELECTOR
POSTTTONSYMPTOMPROBABLE CAUSEFLUID PRESSURE
StandardS€rvica Limit
Throttle Bloil or lDllPressure too
high
Thfottle Valve BO-15 kPa
{O-O.1 5 kgf/cm,,
0-2.1 psi)
throttle control lever
fully closed
No or low
Throttle B
pressure
83o 88O kPa(8.5-9.O kgf/cmz,
120 130 psi)
thfottle control levet
fully closed
78O kPa(8.O kgl/cm,, l lO psi)
throttle control lever
tully closed
14-98