check transmission fluid HONDA CR-V 1998 RD1-RD3 / 1.G Workshop Manual

Unit of length: mm (in)Automatic TransmissionSection 14
MEASUREMENTSTANDARO INEW}SERVICE LIMIT
TransmissionfluidCapacity I {US qt, lmp q0 4WD
2WD
6.8 (7.2, 6.0) for overhaul2.9 (3.1, 2.6) for fluid change5.9 {6.2, 5.2)for overhaul2.7 {2.9, 2.4}for fluid change
Hydraulicpressure
kPa
(kgflcm', psi)
Line pressure at 2,000 rpm in LII or El position830 - 880 (8.5 - 9.0, 120 130)780 (8.0, 1't0)
1sl clutch pressure at 2,000 rpm in Da position
1st-hold clutch pressure at 2,000 rpm In l position
2nd clutch pressure at 2,000 rpm in El position800 - 850 (8.2 4.7,120 1241760 t7.7, 1101
3rd clutch pressure at 2,000 rpm in E position ('97,'98 models), or E position with O/D OFF indicatorlight ON ('99,'00 models)
4th clutch pressure at 2,000 rpm in gl position ('97,'98 models), or E position with O/D OFF indicatorlight oFF ('99,'00 models)
Stall speed rpm (Check with vehicle on level ground)2,5502,400,2,700
Clutch initial clearance 1st2nd,3rd,4th'lst-hold
Clutch return spring free length 1st, 2nd, 3rd, 4th'1st-hold
Clutch disc thicknessClutch plate thickness 2nd, 3rd, 4th1st, 1st-hold
0.65 - 0.85 (0.026 -0.033)
0.40 - 0.60 (0.016 - 0.024)0.5 - 0.8 (0.020 - 0.031)31 .1 11 .22)34.6 (1.36)
1.88 - 2.00 (0.074 - 0.079)'r.95 - 2.05 {0.077 0.081)'1.55- 1.65 (0.061 - 0.065)
29.1 (1.15)
32.6 (r.28)
Until grooves worn outDiscolorationDiscoloration
Clutch end plate thickness Mark 1(lsti Mark 2Mark 3Mark 4Mark 5Mark 6Mark 7Mark 8Mark IMark 10
2.05 - 2.r0 (0.081 - 0.083)2.15 2.20 (0.085 - 0.08712.25 2.30 (0.089,0.091)
2.35 2.40 {0.093 - 0.094}2.45 - 2.50 {0.096- 0.098}2.55 - 2.60 (0.100 - 0.102)2.65 - 2.70 (0.104 - 0.106)2.75 2.80 i0.108 - 0.110)2.85 - 2.9010.r 12 0.114)2.95 - 3.0010.116 0.118)
Discoloration
Discoloration
Clutch end plate thickness Mark 6{2nd, 4th) Mark 7Mark 8Mark 9Mark 10Mark 11lvlark 12Mark 13Mark 14Mark 15Mark 16Mark 17
2.55 2.60 10.100 - 0.102)2.65 2.70(0.104,0.106)2.75 - 2.80 (0.108 0.110)2.85 - 2.90 (0.112 -0.rr4)
2.95 3.00 (0.116-0.118)
3.05 - 3.10 (0.120 - 0.122)3.15 3.20 (0.124-0.126)
3.25 - 3.30 (0.128 0.130)3.35 - 3.40 (0. r32 - 0.134)3.45 - 3.50 (0.136 - 0.138)3.55 3.60 (0.140 - 0.142)3.65 - 3.70 (0.144 - 0.146)
Discoloration
Discoloration
Clutch end plate thickness Mark 8
{3rdi Mark IMark 10Mark 11Mark 12Mark 13Mark 14Mark 15Mark 16Mark 17
2.75 - 2.80 (0.108 0.110)2.85- 2.90 (0.112 - 0.114)2.95 - 3.00 (0.116 - 0.1'j8)3.05 3.10 (0.120 - 0.122)3.15-3.20 {0.124 0.126)3.25 - 3.30 (0.128 - 0.r30)3.35 - 3.40 (0.132 - 0.r34i3.45 - 3.50 (0.136 - 0.138)3.55 - 3.60 {0.140 - 0.142)3.65 - 3.70 {0.144 - 0.r46)
Discoloration
Discoloration
Clutch end plate thickness Mark 1(1st hold) Mark 2Mark 3
No markMark 6Mark 7
2.05 2.10 (0.081 - 0.08312.r5 2.20 (0.085 - 0.087)2.25 - 2.30 {0.089 - 0.091}2.35 - 2.40 10.093 - 0.094i2.45 - 2.50 (0.096- 0.098i2.55 - 2.60 (0.r00 - 0.102)2.65 - 2.70 (0.r04 - 0.106)
(cont'd)
2-7
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Standards and Service Limits
Automatic Transmission (cont'dl - Section 14
Differential (4WDl * Section 15
MEASUREMENTSTANOABD {NEW'
SteeringSection 17
* When using a new belt, adjust deflection or tension to new values. Run the engine for 5 minutes then turn it off.Readjust dellection or tension to used belt values.
MEASUREMENTSTANDARO INEWI
Wire Dia.o.D.Fiee LengthNo. of Coils
SpringsRegulator valve spring ARegulator valve spring BStator reaction springModulator valve springTorque convener check valve spring'97 model'98 - 00 modelsCooler relief valve springRelief valve spring2nd orilice control valve spring1-2 shitt valve spring2 3 shift valve spring3-4 shift valve spring1st accumulator spring4th accumulator spring B4th accumulator spring A2nd accumulator spring A3rd accumulator spring A2nd accumulator spring B3rd accumulator spring I3rd sub accumulator spring2nd accumulator spring CLock-up shift valve springLock-up timing valve springLock'up control valve spring3'4 orifice control valve springServo control valve springCPB valve spring4th exhaust valve spring
1.8 10.071)1.8 i0.071)4.5 (0.177)
1.4 {0.055)
1.1 (0.043)
1.2 (0.047)
1.0 (0.039)
1.1 (0.043)
0.7 (0.028)
0.9 (0.035)
0.9 (0.035)
0.9 (0.03s1
2.1 (0.083)
2.3 (0.091)
2.6 (0.102)
2.410.094)2.8 (0.110)
1.6 (0.063)
2.1 (0.083)
2.7 {0. r06)2.2lO.OA7)0.9 (0.035)
0.9 (0.035)
0.7 (0.028)
0.6 (0.024)
1.0 (0.039)
0.9 (0.035)
0.9 (0.035)
14.7 (0.579)
9.6 (0.378)
35.4 {1.394}9.4 (0.370)
8.4 (0.331)
8.4 (0.331)
8.4 (0.331)
8.6 (0.3391
6.6 (0.260i
7.6 {0.299}7.6 {0.299)7.6 {0.299)16.0 (0.630)
10.2 to.402l17.0 (0.669)
29.0 \1.1421'r7.510.689)
9.0 (0.354)
31.0 (1.220)17.0 (0.669)
14.510.571)7.610.299i8.1 {0.319}6.6 (0.260)
6.6 (0.260i
8.1 (0.319)
8.1 {0.319)6. t (0.240)
87.8 (3.457)
44.011.132130.31r.193)35.0 {1.378)
36.4 {1.433)32.4 tl.216J33.8 {r.331)37.1 (1.461)
34.8 (1.370)
41.3 (1.626)
57 .0 (2.2441
57 .0 12.244189.1 (3.508)
51.6 (2.031)
88.4 (3.480)
39.011.s35)94.313.713)20.7 10.8r5)38.2 (1.504)
39.0 (1.535)
68.0 (2.677)
73.7 12.902)8r.4 (3.205)
38.0 fl.496)37.9 (1.492)
52.1 (2.051)
41 .2 t .A5Al36.4 (1.4331
r 1.01.910.9
12.O12.78.213.422.0
26.426.8
13.814.22.915.9
2.66.3
32.047.A
20.8'18.3'19.5
Capacity f (US qt, lmp ql)1.2 (1.3, 1.1) at overhaul1.0 (1.1, 0.91 at fluid change
MEASUREMENTSTANDARD INEWI
Steering wheelRotational play at steering wheel circumferenceStaning load at steering wheelcircumferenceN {kgf, lbl) Engine running
0- 10 (0 - 0.39)
29 (3.0,6.6)
GearboxAngle of rack$uide-screw loosened lrom locked position'97, '98 models'99, '00 models10" 1 5"20" MAX.
PumpPump pressure with shut off valve closedkPa (kgvcm,, psi)6,900 - 7,800 (70 80,995 1,138)
Power steeringfluidRecommended tluidFluid capacity For overhaulI {US qt, lmp q0 For reservoir
Honda power steering fluid.0.85 (0.90,0.75)
0.4 {0.42,0.35)
Power steeringbelt*Deflection with 98 N {1O kgl,22lht)between pulleys11.0 14.5 (0.43 0.57)with used belt7.5 - 10.0 (0.30 0.40) with new belt
Belt tension N {kgt, lbf}Measured with belt tension gauge390 - 540 (40 - 55, 88 - 121) with used belt740-880 (75 90, 165 198)with new belt
2-10
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Engine Removal/lnstallo cton
Installation (cont'd)
8. Tighten the nut on the right front mount.
AlTi
59 .m 16.0 tgt m, (l lbfftlReplace.
MlTi
12 x'1.25 mm59 N.m 16,0 kgt m, /(} lbt ttlReolace.
5-16
9. Perform the following checks and adjustments:. Check that the spring clip on the ends of the drive-shaft and intermediate shaft clicks into place. Usenew spring clips.. Adjust the shift cable (see section l4).. Adjust the throttle cable (see section 11).. Refill the engine with engine oil (see page g-4).
. Refill the transmission with oil or fluid (see sec-tion 13 or 14).
. Refill the radiator with engine coolant (see page
10_5).
. Bleed air from the cooling system with theheater valve open (see page l0-5).. Clean the battery posts and cable terminals withsandpaper, assemble them, then apply grease toDrevent corrosron.. Inspect for fuel leakage (see section 1l).After assembling fuel line pans, turn on the igni-tion switch (do not operate the starter) so thatthe fuel pump operates for approximately twoseconds and the fuel Iine pressurizes.
Repeat this operation two or three times, andcheck for fuel leakage at any point in the fuel line.
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MaintenanceBack-up Light Switch
Transmission Fluid
NOTE: Check the fluid with the engine OFF and vehicle
on level ground.
1. Remove the filler plug. then check the level and
condition of the fluid.
FILLER PLUG44 N.m {4.5 kgf.m. 33 lbf ftl
ll
Ptopet Level
\--ril /
HllllllTl /
Hllllrlll /_rf-F{--rno."."
ll| | Replaco.
The fluid level must be up to the filler hole. lf it is
below the hole, add fluid until it runs out. then rein-
stall the tiller plug with a new washer.
lf the transmission fluid is diny, remove the drain
plug and drain the fluid.
FILLEB PLUGa,a N.m 14.5 kgf..n. 33 lbt'ftl
DRAIN PLUG39 N m (4.0 kgf.m, 29 lbf'ft)WASHERReplace.
Reinstall the drain plug with a new washer. and
refill the transmission fluid to the proper level.
NOTE: The drain plug washer should be replaced at
every fluid change.
Reinstall the filler plug with a new washer.
Fluid Capacity
1.7 / {1.8 US qt, 1.5 lmp qtl at oil change
2.1 ! 12.2 US qt, 1.A lmp qtl at overhaul
Alwavs use Genuine Honda Manual Transmission
Fluid (MTF). Using motor oil can cause stiffer shift-
ind because it does not contain the proper additives.
Test/Replacement
1. Disconnect the connectors from the switch.
Terminal side oImale lerminals
BACK.UP LIGHT SWTTCHr 25 N.m 12.5 kgt m, 18 lbf.ftl
WASHERReplace.
Check for continuity between the No. 1 and No. 2
terminals.
. There should be continuity when the shift lever
tnto reverse.
. There should be no continuity when the shift
lever in position except reverse,
lf necessary, replace the switch.
13-3
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Transfer Assembly
lnspection
@ Make sure tifts, iacks, and satety stands
are placed properly (see section 1).
L Raise the front of the vehicle, and support it with
safety stands (see section 1).
2. Set the parking brake, and block both rear wheels
securely.
3. Shift to neutral oosition.
4. Make a reference mark across the DroDeller shaft
and the transfer assembly flanges,
REFERENCE
8 x 1.25 mm32 N.m (3.3 kg{.m.24 rbf.ftlReplace.
Separate the propeller shaft from the transfer
assemDty.
5.
13-4
6. Set a dial indicator on the transfer assembly flange,
then measure the transfer gear backlash.
STANDARD: 0.06 - 0.16 mm (0.002 - 0.006 in)
COMPAf{ION FI-ANGE
1.lf the measurement is out of specification, remove
the transfer assembly and adjust transfer gear back-
lash (see page 13-44 thru '13-61).
Check the transfer oil seal for damage and fluid
teaKs.
lf oil seal replacement is required, remove the trans-
fer assembly, replace the oil seal, and adjust the
total starting torque (see page 13-44 thru 13-61).
NOTE: Do not replace the oil seal when the transfer
assembly is installed on the transmission.
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Transfer Assembly
lnstallation
1. Install a new O-ring on the transfer assembly.
8 x 1.25 mm24 N.m (2.4 kgt m,17 rbt.ftl
10 x 1.25 mm44 N.m (4.5 kgJ.m,
2.
DOWEL PIN
Replace.TRANSFEBASSEMBLY
Clean the areas where the transfer assembly con
tacts the transmission with solvent or carburetor
cleaner, and dry with compressed air. Then apply
MTF to the contact areas.
Installthe transfer assembly on the transmission.
NOTE: While installing the transfer assembly on
the transmission, do not allow dust or other foreign
particles to enter the transmission.
lnstall the rear stiffener.
Install the propeller shaft to the transfer assembly
by aligning the reference marks,
8 x1.25 mm32 N.m 13.3 kg{.m,24 tbf.ftl
REFERENCE MARKS
6. Install the exhaust pipe A,
GASKETEXHAUST PIPE A
HO2S CONNECTOR
10 x 1 .25 mm54 N.m (5.5 kgt m,40 tbtfttReplace.
SELF.LOCKING
NUT8 x 1.25 mm16 N.m {1.6 kgf.m,12 tbt.ft)Replace.8 x 1.25 mmzzN.m l2.2kg!-m,16 rbf.trtReplace.
7.Connect the heated oxygen sensor (HO2S) connector.
Relill the transmission with MTF (see page 13-3).
Start the engine, and run it to normal operating tem-
perature (the radiator tan comes on). Turn the
engine off. and check fluid level.
8.
9.
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12. Apply liquid gasket to the surface of the transmis-
sion housing as shown.
Note these items:
. Use liquid gasket (P/N 08718 - 0001 or 08718 -
0003).
. Remove the dirty fluid from the sealing surface.
. Seal the entire circumterence of the bolt holes to
prevent fluid leakage.
. lf 20 minutes have passed after applying liquid
gasket, reapply it and assemble the housings.
a Allow it to cure at least 20 minutes after assem-
bly betore filling the transmission with MTF.
Install the 14 x 20 mm dowel pins.
Set the stopper ring as shown. Place the transmis-
sion housing over the clutch housing, being careful
to line up the shafts. Be sure to align the stop ring
with the 5th shift fork finger tip.
r3.
14.
TRANSMISSION HOUSING
SHIFT FORK
vk..*,
Align point
17.
the 32 mm sealing bolt.
15. Lower the transmission housing with the snap ring
pliers. and set the snap ring into the groove of the
countershaft bearing.
Check that the snap ring is securely seated in the
groove of the countershaft bearing.
Dimension A as installod: 3.6 - 6.3 mm
(0.142 - 0.2/8 in)
16.
32 mm SEALING BOLT25 N m 12.5 kgf.m, 18 lbf.ftlSNAP RING
(cont'd)
13-69
Apply liquid gasket (P/N 08718 - 0001 or 08718 -
0003) to the 32 mm sealing bolt threads, then install
SNAP RING PLIERS
DOWEL PINS
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Automatic Transmission
Special Tools . 14'2OescriptionGeneral Operation . .... 14 3Power Flow . . .. '14_6
Electronic Control System .. .. . . .. .14_15Hydraulic Control .. 14 24Hydraulic Flow....-....... .. . .... .. .. . 14_29Lock'up Syslem .. .'t4'39Electrical SystemComponenl Locdlrons 14 45
PCM Circuil Dragram (A/T Control Svstem)'97 Model ....................... . . .. - . ... .14-46'98Model ................. . ... .. .. .1450'99 00Models.... . .... . . . 1452
PCM Terminal Voltage/Measuring ConditionsA"/T Control System-'97Model ...... ..14'48A,/T Control System -'98 00 Models . . .. . . 14 54
Troubleshooting Procedures .. ..... ... - 14_56Svmotom to comoonent CharlEiectr,cal Syslem -'97 Model . . 14 60Electrical System -'98 - OO Models . .. . . 14_62Electrical Troubleshooting ('97 Model)Troubleshooting Flowaharts .... ..... . .. . . 14_64
Electrical Troubleshooting ('98 - 00 Models)Troubleshootinq Flowclt"n" .... . ....- . .14-93ElectricalTroublesliooting('99 00Models)Troubleshootino FlowchartO/D OFF Indicator Light Does Not Come On 14 131
O/D OFF Indicator Liaht On ConstantlY . . . .1!-132O/D OFF Indicator Light Does Not Come OnEven Though O/D Switch ls Pressed . .... - 14_133
Lock up Control Solenoid Valve A,/B AssemblyTest....................-......... . .14-135Replacement . .ll_135Shifr ControlSolenoid Valve Ay'B Assembl,Test .............................. . .. 14-136
Replacement..............- . .14'136Linear Solenoid AssemblYTest.............................................. .. .... . 14_137Replacement .. . 14138Marnshaftlcountershafl Speed SensorsReplacement ...-... 14_138A/T Gear Position SwitchTest ..........................-... . .. 14-139ReplacementA/T Gear Positionlndicator.................. 14-140
Valve Eodynepair ............................... ..... . . .. - . .. ... 14 192
Assembly .................... .. 1{_193
Valve CapsDesciiption....-........................ .. ...... 14194
tnspeition ................... .. 14' 195
N4ain Valve BodyDisassembly/lnspection/Reassemblv - ...... .. 14_196
Secondarv Valve BodYDisassemblv4nspectron/ReassemblY .. . 14 198
Reoulator Valve Bodvbisassembtv,lnspiction/Reassemblv . 14199
Servo EodvDisassembly/lnspection/Reassembly ... ....14'200
Lock'uo Valve BodYDis;ssembly/lnspection/Reassembly .... . 14_201
MainshaftDisassembly/lnspection/Reassembly .. .. .. ..14'202
Inspection ....-.............. ..11_203
Sealing RingsReilaceient ...... ..... . 14'204
CountershaftDisassembly/lnspection/Reassembly .. . . . . . 11-205
Disassembly/Reassemb|y . . ........ ...... . .. 14_206Inspedron ................ . .... . 14 207
One wav ClutchDisassembly/lnspection/ReassemblY ... 11_209
Sub-shaftDisassembly/lnspection/Reassembly ... . .. . 14-210
oisassembly/Re6ssembly . . ... .-...... . . ..14-211
Sub-shaft BearingsReplacement .......14'212
Clutchllfustrated Index .......... . . .14-213
Disassembly .... .. .....14-216Reassembfy .... . .. .. . 14'218
Differentialllfustrated Index " 14-222Backlash Inspection . .... . .14'223
Bearing Repiacement .. 11-223
Differe-ntial Carrier Replacement .. .. . . . .. ..11-2?4
OifSeal Replacement. . .. 14'225
Side Clearance lnspection . . - .. ... . - ...... . .. 11'226
Transmission Housing BearingsMainshaJVCountershaft EearingsRepfacement .......14221Sub'siralt Eearing Replacement . . . . . . . . . ..11'224
Toroue Converter Housing BearingsMainshattEearing/OilSe6lReplacement . .. l4229
Countershaft Bea;ing Replacement.. .... .. ..14-230
Input Test - '97 - 98 ModelsInput Test '99 - 00 Models
Symptom to-Component ChartHydraulic System ...............
Checking
Removal ...,lllustrated Index (4WD)
Interlock SystemInterlock ControlUnit lnputTest. -..... -.. .... . - 14 144* Key Interlock Solenoid Test .- .. . . . - . . . ..... 14_146* Shift Lock Solenoid Test ..............-.-. . .. . ... .... 14 147*Shift LockSolenoidReplacement...... .. . .. .. 14 148* park pin Switch Test ......... 14 119' Park Pin Switch Replacement- '97 - 98 Models ....... 14-150* Park Pin Swirch/Over Drive (O/Di SwitchReplacemenl '99-00Models . .. 14_151over-Drive (O/D) Switch {'99 00 [4odels]Test........_..................... .......14-152Hydr.ulic System
..............._............... t4 142.................................. 14-143
Control Lever AssemblyR6placement ......,.,Reverse ldler Gear
lllustrated lndex
.......... 14-230
14 231
11-231
1nsta1|ation ..................Park StopInspeclion/AdjustmenlTransfer AssemblY.......14.232
RoadTest.............-.... ........ .StallSpeedTest ....._........................ ....... 14-159Fluid Level......_................... 14'160
Disessembly .................... 14-235Transfer Drive Gear BearingReplacementTrans{er Driven Gesf Shaft BearingReplacementTransfer Housing Roller BearingReplacementTransfer Cov€r A Bearing Outer RaceReplacementTransfer Housing Bearing Outer RaceReplacement ......-..,,,,,.....ReassemblvTransmassaonBeassembly ... -.. .... .14 250
Torque Converier/Drive Plate . .-. .... .. . ... .....14_258
Transmissionlnstatlation .................. ....... 14'259
Cooler Flushing . . ......11-261ATF Cooler HosesConnection.................. ....... 14-266I Shift LeverRemoval/lnstallation . .. 14'261
Disassemblv/Reassemblv - '97 - 98 Models . . 14_264
Disassembli/Reassemblv -'99 - 00 Models . 14-269
Over'Orive (O/D) Switch WireClearanceAdjustment. - ... . . . .. .. . 14'270
Detent Spring Replscement . . -.. ... .14'271*Shift CableAdiustment ....... 14'272
Repfacement.............. . 11'273
14 15711-237
11-237
14-238
$-234
11-23914-240
Transmigrion
Inspeclron ....., ...........Transfer AssemblyRemova1,.,,,..............,lnstallalion ........... .. ...Transmission
14 164
14-16514,167
14-169
End Cover/Transmissio . 14'174Transmission Housing .... ... .. . . .... .. 14-176Torque Converter Housingly'alve Body.. - ... -. 14 178
lllustrated lndex (2WD)End Cover/Transmissio ....... 14 180Transmission Housing . . ... . .. .... ... 14'182Torque Convener Housing/r'alve Body ......- 14-184
End CovefRemovat ...................... ....... 14'186Transmission HousingRemoval ...................... .. 14_188Torque Convener HousingA/alve BodYRemovat ................-..... .-..... 14-190
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Description
General Operation
The Automatic transmission is a 3-element torque converter and triple-shaft electronically controlled unit which provides 4
speeds forward and 1 reverse speed The unit is positioned in line with the engine'
There are two tvoes of automatic transmission on CR-V; the four-wheel drive (4WD) model ('97 - 00)' and the front-wheel
drive (2WD) model ('98 - 00).
Toroue Converter, G€ars, and Clutches
The torque converter consists of a pump. turbine. and stator assembly in a single unit. The torque converter is connected to
the engine crankshatt. These parts 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 started. The torque converter assembly serves as a fly-
wheel while transmitting power to the transmission mainshaft.
The transmission has three parallel shafts: the mainshaft. the countershaft, and the sub-shaft. The mainshaft is in line with
the engine crankshaft. The mainshaft includes the 1st, 2nd. and 4th clutches, and gears lor 3rd,2nd,4th. reverse and 1st
(3rd gear is integral with the mainshaft, while reverse gear is integral with the 4th gear). The countershaft includes the 3rd
clutch and gears for 3rd,2nd, 4th, reverse, 1st, and park. Reverse and 4th gears can be locked to the countershaft at its cen-
ter, providing 4th gear or reverse, depending on which way the selector is moved. The sub-shaft includes the lst-hold
clutch and gears for lst and 4th.
The gears on the mainshaft are in constant mesh with those on the countershaft and sub-shaft. When certain combinations
of gears are engaged by the ctutches, power is transmitted from the mainshaft to the countershaft to provide E, D!, tr, tr,
and E position ('97 - 98 models). and E. E, E, and E position ('99 - 00 models)'
Electlonic Control
The electronic controt system consists of the Powenrain Control Module (PCM), sensors, a linear solenoid, and four
solenoid valves. Shifting and lock-up are electronically controlled for comfortable driving under all conditions. The PCM is
located below the dashboard, under the kick panel on the passenger's side.
Hydraulic Control
The valve bodies include the main valve body, the secondary valve body, the regulator valve body, the servo body, and
the lock up valve body. They are bolted to the torque converter housing. The main valve body contains the manual valve,
the 1-2 shift valve, the 2nd orifice control valve. the CPB {Clutch Pressure Back-up) valve, the modulator valve, the servo
control valve. the relief valve, and ATF pump gears. The secondary valve body contains the 2-3 shift valve, the 3-4 shift
valve, the 3,4 orifice control valve. the 4th exhaust valve and the CPC (Clutch Pressure Control) valve. The regulator valve
bodv contains the pressure regulator valve, the torque converter check valve, the cooler relief valve, and the lock-up con-
trol valve. The servo body contains the servo valve which is integrated with the reverse shift tork, and the accumulators
The lock-up valve body contains the lock-up shift valve and the lock-up timing valve. The linear solenoid and the shift con-
trol solenoid valve Ay'B are bolted to the outside of the transmission housing, and the lock-up control solenoid valve Ay'B is
bolted to the outside of the torque converter housing. Fluid trom the regulator passes through the manual valve to the
various control valves. The clutches receive fluid from their respective feed pipes or internal hydraulic circuit
ShiftControl Mechanism
input from various sensors located throughout the vehicle determines which shift control solenoid valve the PCM 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. The shift control solenoid valves A and B are
controlled by the PCM.
Lock-up Mechanism
tn E! position (,97 - 98 modets) and in E position ('99 - O0 models), in 3rd and 4th, and in Del position in 3rd ('97 - 98
models) and in El position with Over,Drive (O/D) is OFF (by pressing rhe O/D switchl in 3rd ('99 - 00 models), 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 PcM optimizes the timing 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 the linear solenoid. When lock-up control
solenoid valves A and B activate, the modulator pressure changes. The lock-up control solenoid valves A and B and the
linear solenoid are controlled by the PCM.
{cont'd)
14-3
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Description
Hydraulic Flow (cont'dl
lll Position
As the engine turns, the ATF pump starts to operate. Automatic transmission fluid (ATF) is drawn from (99) and dis-charged into (1). Then, ATF flowing from the ATF pump becomes line pressure ('l). Line pressure (1) js regulated by theregulator valve. Torque converter inlet pressure {92) enters (94) of the torque conveTter through the lock-up shift valve anddischarges into (90) The torque converter check valve prevents torque converter pressure from rising. Under this condi-tion, hydraulic pressure is not applied to the clutches.
NOTE;
. When used. "|eft" o. "right" indicates direction on the hvdraulic circutt.. The hydraulic circuit shows the '97 - 98 models {7 positions}; the '99 - 00 models (6 positions) is similar.
'lF'.j.l
14-30
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