2000 HONDA CR-V switch

Description
Rear Differential
Outline
The Real-time 4WD-Dual Pump System model has a hydraulic clutch and a differential mechanism in the rear differential
assembly. Under normal conditions, the vehicle is driven by the front wheels. However, depending on to the driving force
of the front wheels and the road conditions. the system instantly transmits appropriate driving force to the rear wheels
without requiring the driver to switch between 2WD (tront wheel drive) and 4WD (four wheel drive). The switching mecha-
nism between 2WD and 4WD is integrated into the rear differential assembly to make the system light and compact.
ln addition, the dual-pump system switches off the rear-wheel-drive force when braking in a forward gear. This allows the
braking system to work properly on models equipped with an Anti-lock Braking System (ABS).
Construction
The rear differential assembly consists of the torque control differential case assembly and the rear differential carrier
assembly. The torque control differential case assembly consists of the differential clutch assembly, the companion
flange, and the oil pump body assembly. The rear differential carrier assembly consists of the differential mechanism. The
differential drive and driven gears are hypoid gears.
The oil pump body assembly consists of the front oil pump, the rear oil pump, the hydraulic control mechanism, and the
clutch piston. The clutch piston has a disc spring that constantly provides the differential clutch assembly with a preset
torque to Drevent abnormal sound.
The clutch guide in the differential clutch assembly is connected to the propeller shaft via the companion flange, and it
receives the driving force lrom the transfer assembly. The clutch guide rotates the clutch plate and the front oil pump in
the oil pump body.
The clutch hub in the differential clutch assembly has a clutch disc that is splined with the hypoid drive pinion gear. The
hypoid drive gear drives the rear oil pump.
The front and rear oil pumps are trochoidal pumps. The rear oil pump capacity is 2.5 percent larger that the front oil pump
to handle the rotation difference between the front and rear wheels caused by worn front tires and tight corner braking.
The oil pumps are designed so the fluid intake works as a fluid discharge when the oil pumps rotate in reverse. Genuine
Honda CVT fluid is used instead of differential fluid.
Operation
When there is a difference in rotation speed between the front wheels (clutch guide) and rear wheels (hypoid driven gear),
hydraulic pressure from the front and rear oil pumps engages the differential clutch, and drive force from the transler
assembly is applied to the rear wheels.
The hydraulic pressure control mechanism in the oil pump body selects 4WD mode when the vehicle is started abruptly,
or when accelerating in a forward or reverse gear (causing rotation difference between the front and rear wheels). or
when braking in reverse gear {when decelerating). lt switches to 2WD mode when the vehicle is driven at a constant speed
in forwar! or reverse gear (when there is no rotation difference between the front and rear wheels), or when braking in a
fo rwa rd gear (when decelerating).
To protect the system, the differential clutch assembly is lubricated by hydraulic pressure generated by the oil pumps in
both 4WD and 2WD modes. Also, the thermal switch relieves the hydraulic pressure on the clutch piston and cancels 4WD
mode if the temDerature of the differential fluid rises above normal.
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TOROUE CONTROL OIFFERENTIAL
REAR DIFFERENTIAL ASSEMBLY
OIL PUMP BODY
OIFFERENTIAL CLUTCHHYPOID DRIVEPINION GEAR
OIFFERENTIAL CARRIER
DIFFERENTIAL
HYPOID RING GEAR
DIFFERENTIAI- HOUSING
REAR OII- PUMP
ASSEMBLY
CLUTCH GUIDE
COMPANION FLANG€
CLUTCH HUB
CLUTCH PLATE
HYDRAULIC CONTROL SYSTEM
CLUTCH PISTON
CLUTCH DISC
REAR OIL PUMP
FRONT OIL PUMP
DISC SPRINGFRONT OIL PUMP
DIFFEREMT|AL CLUTCHASSEMBI-Y
THERMAL SWITCHRELIEF VALVEOIL STRAINER
15-5
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Thermal Switch Operation l2WD)
During 4WD operation, pressure-regulated fluid is in contact with the clutch piston and the thermal switch.
lf the temperature of the fluid in the differential goes too high, the thermal switch pushes open the relief valve R. This
causes the pressure in the clutch piston to drop, and 4WD mode is disengaged.
THERMAL SWITCHRELIEF VALVE
Reliet Valve Operation
When the fluid pressure goes higher than the relief valve spring force, check valve R opens. Pressure applied at the clutch
piston is held constant. This feature adds stability by preventing the rear wheel drive system from experiencing excessive
to rque.
RELIEF VALVE
15-9
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Steering
Special Toofs ............. 17-2
Component Locations
Index ................ ....... 17-3
Troubleshooting
General Troubleshooting ................ 1 7-4
Noise and Vibration ......................... 17-8
Fluid Leaks ............. 17-10
Inspection and Adiustment
Steering Operation .......................... 17-12
Power Assist Check
With Vehicle Parked ....................
Steering Linkage and Gearbox .......
Pump Belt
Rack Guide Adjustment ...................
Fluid Rep|acement ...................,,.,....
Pump Pressure Check .................,,...
*Steering Wheel
Removal ................. 17-18
*Steering Column
Removal/lnstallation ................ ....... 17 -2O
lnspection .............. 17-21
Steering Lock Replacement ............ 17 -22
Power Steering Hoses, Lines
Ffuid Leakage Inspection ................. 17 -23
Repfacement .......... 17-23
Power Steering Pump
Repfacement .......... 17-24
Disassembly ...........17-25
fnspection .............. 17-26
Reassembly ............ 17-28
Power Steering Gearbox
Removal ................. 17-31
Disassembly ........... 17-34
Reassembly ............ 17-40
Ball Joint Boot Replacement .......... 17-50
Installation ............. 17-51
17-12
17-13
17-14
l7-15
17-15
17-16
Disassembly/Reassembly............... 17-18
4'%/b.......... -r'-7--a/
SUPPLEN\EN AL RES\RA(N SYSTES{ (SRS\
This model has an SRS which includes a driver's airbag in the steering wheel hub. a passenger's airbag in the dashboardabove the glove box ('97 - 00 models), and seat belt tensioners in the seat belt retractors ('98 - 00 models). Informationnecessary to safely service the SRS is included in this Service Manual. ltems marked with an asterisk (*) on the contentspage include, or are located near, SBS components. Servicing. disassembling or replacing these items will require specialprecautions and tools, and should only be done by an authorized Honda oearer.
To avoid rendering the SRS inoperative, which could lead to peFonal iniury or death in the event of a sevore trontalcollision. allSRS service work must be performod by an authorized Honda dealer.lmproper service procedurgs, including incorrect removal and installalion of the SRS, could lead to personal iniurycaused by unintontional deployment of th€ airbags {'97 - 00 models), and seat belt tensioners ('98 - 00 modelsl.Do not bump the SRS unit. Otherwise, the system may lail in case ot a collision, or the airbags may deploy when theignition switch is ON (lll.
SRS electrical wiring harnesses are identitied by yellow colof coding. Ralated components are located in the steeringcolumn, front console, dashboard, dashboard lower panel, and in the dashboard above the glove box. Do not use elec-trical test equipment on these cilcuits,
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Steering Wheel
Removal
SRS components are located in this area. Review the
SRS component locations, precautions, and procedures
in the SRS section (24) before performing repairs or ser-
vice.
1. Align the front wheels straight ahead. then remove
the driver's airbag assembly (see section 24) from
the steering wheel.
2. Disconnect the horn connector and cruise control
switch connectors.
CONTROLSWITCHES CONNECTOR
3. Loosen the steering wheel bolt, then install a steering
wheel puller on the steering wheel and remove it.
Note these items when removing the steering wheel:
. Do not tap on the steering wheel or the steering
column shaft when removing the steering wheel.
. lf you thread the puller bolts into the wheel hub
more than five threads, the bolts will hit the cable
reel and damage it. To prevent this, install a pair
of jam nuts five threads up on each puller bolt.
STEERING WHEEL BOLT39 N.m 14.0 kgt.m,29 lbtftl
STEERING WHEEL EOLT
Disassembly/Reassembly
EOSS COVER PLATE
_^M
STEERING WHEEL
WHEEL BODY COVER
17-18
@,
ACCESS PANEL
h"\
BODYCOVER CAP
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lnstallation
1. Before installing the steering wheel, make sure the
front wheels are aligned straight ahead, then center
the cable reel. Do this by first rotating the cable reel
clockwise until it stops. Then rotate it counterclock-
wise approximately two turns. The arrow mark on
the cable reel label should point straight up.
ARROW MARK
2. Install the steering wheel on to the steering column
shaft, making sure the steering wheel shaft engages
the cable reel and canceling sleeve. Do not tap on
the steering wheel or steering column shatt when
instailing the steering wheel
HOLE
Install the steering wheel bolt, and tighten it to 39
N.m (4.0 kgf.m, 29 lbf.ft).
Connect the horn connector and the cruise control
switch connectors,
Install the driver's airbag assembly, and confirm
proper system operation (see section 24).
CABLE REEL
17-19
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Steering Column
Removal/lnstallation
SRS components are located in this area. Review the
SRS component locations, precautions, and procedures
in the SRS section (24) before performing repairs or ser-
vice.
Note these items when removing the steering column:. Before removing the steering column, remove thedriver's airbag assembly and cable reel (see section24).
. Before removing or installing, set the column shaft inthe neutral position by pulling up the steering columnto uppermost position, then lower it 8 mm (5/16 in).Tighten tilt lever.
FULL STROKE:23 mm 10.9 in)
MAXIMUM UPPER8 mm (5/16)
POSTTTON
Remove the steering wheel (see page 17-18).
Remove the driver's side dashboard lower cover
and knee bolster (see section 20),
Remove the column covers.
With A"/T, move the shift lever to the E position,
and remove the shift cable from the column. andset it aside (see section 14).
Remove the combination switch assembly from thesteering column shaft by disconnecting the connec-
tors, and removing the two screws.
Disconnect the steering joint from the engine com-panment.
Remove the steering column by removing theattaching nuts and bolts.
7.
1.
MAXIMUM LOWERPOSTTTON
SHAFT CENTER
111 mm 100 mm5mm
JOINT COVERBOOT BAND
9,8 N.m l r .0 kgf.m, 7 lbf.fO
JOINT DUST SEAL
22 N.m (2.2 kgl.m, 16lbtftl
TILT LEVER
UPPER ATTACHING NUTS16 N.m lr.6 kgf.m, 12 lbf.ftl
UPPER COLUMN COVER
COMAINANON SWITCH ASSEMBLY
JOINT
COLUMN BMCKET
LOWER ATTACHING BOLTS39 N.m lir,o kgf.m, 29 lbf.ft)
17-20
LOWER COLUMN COVER
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Steering Column
Inspection (cont'dl
1.Move the tilt lever from the loose position to the
lock position 3 to 5 times; then measure the tilt
lever preload 10 mm (0.4 in) from the end of the tilt
rever.
Preload: 70 - 90 N (7 - 9 kgf, 15 - 20 lbf)
lf the measurement is out of the specification.
adjust the preload using the tollowing procedures.
a. Loosen the tilt lever, and set the steering column
in the neutral position.
b, Remove the 6 mm lock bolt. and remove the
stop. Be careful not to loosen the tilt lever when
installing the stop or tightening the 6 mm lock
bolt.
SPRING SCALENLT LOCK BOLTTighten the lock bolt withthe tilt lever raised.
L-_
d.
6 mm LOCK BOLT7 N.m (0,7 kgf.m, S tbtftl
Adjust the preload by turning the tilt lock bolt left
or ri9ht.
Pull up the tilt lever to the uppermost position.
and install the stop. Check the preload again. lf
the measurement is still out of specification,
repeat the above procedures a. through c. to
adjust.
17 -22
SHEAR BOLT
Steering Lock Replacement
1.
7.
Bemove the steering column (see page 17 -20).
Center punch the shear bolt, and drill bolt head off
with a 5 mm (3/16 in) drill bit.
Remove the shear bolt from the switch body. Be
careful not to damage the switch body when remov-
ing the shear bolt.
Insert the ignition key and turn it to "1".
Push the lock pin down, and pull out the steering
lock body from the steering column.
Insert the ignition key to the new steering lock
body, and turn it to "1".
Push the lock pin down, and insen the steering lock
body into the steering column until it clicks into place.
Loosely installthe new shear bolt.
Check tor proper operation of the steering wheel
lock, and that the ignition key turns freely.
Tighten the shear bolt untilthe hex head twists off.
TWIST.OFF PORNON
8.
10.
SHEAR BOLTReplace.
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