low oil pressure HONDA CR-V 1998 RD1-RD3 / 1.G Workshop Manual

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METRICITEMENGLISHNOTES
AIR CONDITIONINGCooling capacity3,520 Kcal/h j 14,000 BTU/h
Compressor Type/manutacturerNo. of cylinderCaPacityMax. speedLubricant capacityLubricant type
Scroll/KElHlN
85.7 mf/rev | 5.23 cu'in/rev10,000 rpm130mf 1 algIlozsP-10
Condenser TypeCorrugated fin
Evaporator TypeCorrugated fin
Blower TypeMotor inputSpeed controlMax. capacity
Sirocco fan200 w 112 v4-Speeo440 m3/h 15,500 cu fvh
Temperature control
Compressor clutch TypePower consumptionDry, single plate, poly-V-belt drive40 W max./12 VAt 68'F (20 C)
Befrigerant TypeOuantity
HFC-134a 1R-134a)zoo o' g 24j an oz
STEERING SYSTEMTypeOverall ratioTurns, lock to lockSteering wheel diameter
Power assisted, rack and pinion
SUSPENSIONType Front
Bear
Shock absorber Front and Rear
Independent double wishbone, coil springwith stabilizerIndependent double wishbone, coil springwith stabilizerTelescopic, hydraulic nitrogen gas tilled
WHEEL ALIGNMENTCamber
CasterTotaltoe
FronthearFrontFrontRear0inln 1/16 in0mmln2mm
0'- r"00'2.10'
BRAKE SYSTEMTvpe
Pad surface areaLining surface areaParking brake
Front
RearFrontRearTvpe
Power-assisted selt-ad,ustingventilated discPower assisted self-adiusting drum49 cm, x 2 7.6 sq-in x 273 cm, x2 11.3 sq-in x 2Mechanical actuating, rear two wheel brakes
Drum brake
TIRESize and pressureSee tire inlormation label.
ELECTRICALBafteryStarterAlternator
In under-dash fuse/relay boxIn under hood fuse/relay box
In underhood ABS fuse/relay boxHeadlightsFront turn signal lights
Front parking lightsFront side marker lightsRear side marker lightsRear turn signal lightsErake/parking lightsBack-up lightsCeiling lights {fronvrear)License plate lightSpotlightsHigh mount brake lightlgnition key lightAshtray lightGauge lightsIndicator lightslllLrmination and pilot IightsHeater illumination lights
12 V, 36 AH/s HR12V 1.0, 1.1 kW12V 100A
7.5 A, 10 A, 15 A, 20 A7.5 A, 10 A, 15 A, 20 A, 30 A, 40 A'100 A7.5 4,20 A. 40 A12V 60/55 W12 V- 21 W ('97 model),12 V - 27 W ('98-00 models)12V 5 W {'97 model),3 CP ('98 - 00 models)12V-8W12 V,3 CP12V-21W12 V 2115 W12V 21 CP (18 W)12V-8W12V-8W12V-5W12V -21W
12 V- 1.4 W12V 1.4 W12 V 1.4 W,3 W,3.4 W12V-0.84W, 1.12 W, 1.4 W,3 W, LED12 V - 0.84 W, 1.4 W, LED12 V,1.4 W
2-13
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Valve Seals
12.
Replacement (cylinder head removal not requiredl (cont'dl
Using an upward motion on the lever arm, compress
the valve spring and remove the keepers from the
valve stem. Slowly release pressure on the spring.
Repeat step 11 for the other valve in that cylinder.
Remove the valve seals (see page 6-24).
Installthe valve seals (see page 6-29).
lnstall the springs, the retainers and the keepers in
reverse order of removal.
'17. Repeat steps 9 to 16 for the other three cylinders.
Exhaust valve Seals
18. Using the 5 mm bolts supplied with the tool, mount
the two uprights to the cylinder head at the end
camshaft holders. The uprights fit as shown.
19. Insert the cross shaft through the bottom hole of
the two uprights.
Select the 7/8 in. diameter short compressor attach
ment, and fasten the attachment to the No. 4 hole of
the lever arm with the speed pin supplied.
Position the piston at TDC, and insert an air adaptor
into the spark plug hole. Pump air into the cylinder
to keep the valve closed while compressing the
springs and removing the valve keepers.
13.
14.
15.
16.
20.
t1
22. Put shop towels over the oil passages to prevent
the valve keepers from falling into the cylinder
neao.
23. Position the lever arm under the cross shaft so the
lever is perpendicular to the shaft and the compres-
sor attachment rests on top of the retainer for the
spring being compressed. Use the rear position slot
on the lever as shown.
Using a downward motion on the lever arm, com-
press the valve spring and remove the keepers from
the valve stem. Slowly release pressure on the
spring.
Repeat step 24 for the other valve in that cylinder.
Remove the valve seals (see page 6-24).
Install the valve seals (see page 6-29).
Install the springs, the retainers and the keepers in
reverse order of removal.
Repeat steps 21 to 28 on the other three cylinders.
24.
21.
28.
29.
o-o
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Oil Pressure SwitchOil Pressure
Testing
Remove the YEL/RED wire from the engine oil pres-
sure swrtcn.
Check for continuity between the positive terminal
and the engine {ground). There should be continuity
with the engine stopped. There should be no conti-
nuity with the engine running.
L
PRESSURE SWTCH18 N.m {1.8 kgf.m,13 tbr.ftlApply liquid sealantto the threads,
lf the switch fails
level. lf the engine
orl pressure.
to operate, check the engine oil
oil level is OK, check the engine
Testing
lf the oil pressure warning light stays on with the engine
running, check the engine oil level. lf the oil level is cor-
rect:
L Connect a tachometer.
2. Remove the engine oil
an oil pressure gauge.
ADAPTER(1/8" - 28, BSTP)(Commercially available)
pressure switch. and install
OIL PRESSURE GAUGE
{Commercially available)
4.
ENGINE OIL PRESSURESWTTCH MOUNNNGHOt-E
Start the engine. Shut it off immedjately if the gauge
registers no oil pressure. Repair the problem before
continuing.
Allow the engine to reach operating temperature (fan
comes on at least twice). The pressure should be:
Engino Oil Temperature: 176'F (80'C)
Engine Oil Pressure:
At ldle:70 kPa (0.7 kgt/cm', 10 psil
minimum
Ai 3,000 rpm: 3/r0 kPa {3.5 kgt/cm', 50 psi)
minimum
lf oil pressure in not within specifications, inspect the
oil pump (see page 8-9).
8-7
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Cap Testing
1.
2.
Remove the radiator cap, wet its seal with engine
coolant, then install it on the pressure tester.
Apply a pressure of 93 - 123 kPa (0.95 - 1.25 kgflcm',
14 - 18 psi).
Check for a drop in pressure.
lf the pressure drops, repiace the cap.
RADIATOR PNESSURE TESTER
lCommercially available)
3.
RADIATOR
ADAPTOR(for 32 mm neck, low Profile)
2.
3.
Testing
1.Wait until the engine is cool, then carefully remove
the radiator cap and fill the radiator with engine
coolant to the top oI the filler neck.
Attach the pressure tester to the radiator, and apply
a pressure of 93 - 123 kPa (0.95 - 1,25 kgf/cm', 14 -
18 psi).
Inspect for engine coolant leaks and a drop in pres-
sure.
Remove the tester, and reinstall the radiator cap.
Check for engine oil in the coolant and/or coolant in
the engine oil.
RAOIATOR PRESSURETESTER(Commercially available)
4.
5.
ADAPTOR(for 32 mm neck,low profile)
10-7
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PGM-FI System
Tho Maltunction Indicator Lamo(MlL) n6Yor como3 on leven lortwo laconds) rft6r tho ignhion isturnod ON {lll.
Turn th6 ignition switch ON (ll).
- Repair lhort or opcn in thowire between the No. 25METER 17.5 Al fu3e snd thegauge assembly.- Repl.co the No. 25 METER17.5 Al fus€.
ls the low oil pressure light on?
Try to start the engine.
Chock for an opsn in th€ wiro orbulb {MlL line,:1. Turn the ignition switch OFF.2. Connect the ECM/PCM con-nector terminal A18 to bodyground with a iumper wire.3. Turn the ignition switch ON (ll).
Rep.ir open in the wi.osbotween the ECM/FCM lA18land the gaugo rasombly.Roplece the MIL bulb.
ls th6 MIL on?
Substitute a known-good ECM/PCM and rochock. lf rymptom/indication goes eway, replacetho o gind ECM/PCM.
Turn the ignition switch OFF.Inspect the Fl E/M 115 A) tusein the undeFhood fuse/relaybox.
- Repair short in the wirebetween lhe Fl E/M (15 AlfusG and the PGM-Fl m.in.slay.- Roplsce th€ Fl E/M (15 Alfu3€.
Inspect the No. 13 FUEL PUMP(15 A) fuse in the under-dashfuse/relay box.
- Repair short in th6 wirebetween tho No. 13 FUELPUMP 115 A) luse and thePGM-FI main .elay.- ReDlace tho No. 13 FUELPUMP 115 Al tuse.
Engine Gontrol Module/Powertrain Control Module (ECM/PCM) -'98 - 00 Models
NOTE:. lf this symptom is intermittent, check tor:- A loose Fl E/M {15 A) fuse in the under-hood fuse/relay box- A loose No. 25 METER {7.5 A) fuse in the under-dash fuse/relay box- A loose No. 13 FUEL PUMP (15 Alfuse in the underdash fuse/rolay box- An intermiftent short in the wire between the ECM/PCM (A18) and the gauge assem-
- An int€rmiftent short in the wire between the ECM/PCM (C19) and the MAP sensor- An intermiftent short in the wire between rhe ECM/PCM (C28), the TP sensor, theEGR valve lift sensor and/or {uel tank Dressure sensor- A laulty PGM-FI main relay
ECM/PCM CONNECTOR A (32P}
Wire side of female terminals
(To page 11-871
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PGM-FI System
Random Misfire
lF()gool", tftod-' and some or lpiogol throughTo3oti
The scan tool indicates Diagnostic Trouble Code (DTC)
P0300*,, P1300*1 and some of po30t - pO3O4; Randommisfire.
Descriotion
Misfire detection is accomplished by monitoring the crankshaft speed with the crankshaft speed fluctuation (cKF) sensorwhich is attached to the crankshaft.lfmisfiring strong enough to damage the catalyst is detected, the MIL will blink during the time of its occurrence, and DTcP0300*', P1300*1 and some of DTCs P03ol through P0304 will be stored. Then, after misfire has ceased, the MtL will comeon,
lf misfiring that increases emissions is detected during two consecutive driving cycles, the MIL will come on, and DTcand some of DTCS p0301 through p0304 wi

be stored.NOTE: lf some of the DTCS listed below are stored at the same time as a misfire DTc, troubleshoot those DTcs first. thentroubleshoot the misfire DTC.
P0106, P]128, P1'129; MAp sensorP0171. P0172; Fuet metering
P0505: ldle Control Svstem
P1336, P1337; CKF sensor
P1361, P1362: TDC sensor
Pl381. Pl382: CYP sensor
P1508: IAC valve *1:,97 model*2: '98 - 00 models
Possiblo Caus€
. Fuel pump insufficient fuel pressure, amountofflow. Fuel line clogging. blockage, leakage. Fuel filter clogginga Fuel pressure regulator stuck open. Distributormalfunction
. lgnition coil wire open, leakage. lgnition control module malfunction. Valves carbon deposita Compression lowa Fuel does not meet Owner's Manual spec., lack offuel
Troubleshooting
By test-driving, determine the conditions during which misfire occurs. Depending on these conditions, test in the orderdescribed in the table below.
Possible cause
[ ;;;;- -....
Crankshaft
speed fluctuation
sensor
Fuel
pressureDistributor and
lgnition wirestcMValve
Clearance
Conditionsection 611-178section 23section 23section 6
Only low rpm and load,6)o
Only acceleratingooo
Only high rpm and loado@,a'@
Not specificationG\o@o@
NOTE: lf misfire doesn't recur, some possible causes are fuel that doesn't meet owner's manual spec, lack of fuel, carbondeposits on spark plu9, etc.
11-126
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Ref. No.
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Tool NumberDescriptionOty I Pago Referonc€
Mainshaft Holder
Clutch Spring Compressor Bolt Assembly
Housing Puller
Holder Handle
Oil Seal Driver Aftachment
Attachment, 40 x 50 mm
Clutch Spring Compressor Attachment
Ay'T Pressure Hose, 2210 mm
IVT Pressure Hose Adapter
SCS Service Connector
Companion Flange Holder
Backprobe Set
lVT Oil Pressure Gauge Set w/Panel
A,/T Low Pressure Gauge w/Panel
Adjustable Bearing Puller, 25 - 40 mm
Anachment, 32 x 35 mm
Attachment, 37 x 40 mm
Attachment. 52 x 55 mm
Attachment. 62 x 68 mm
Attachment, 72 x 75 mm
Driver 40 mm l.D.
Attachment, 35 mm LD.
Driver
07GAB - PF50101 or
07GAB - PF50100
07GAE - PG40200 or
OTGAE _ PG4O2OA
07HAC - PK40102
07JAB - 001020A
07JAD - PH80101
07LAD - PW50601
07LAE - PX40100
OTMAJ - PY4O114
07MAJ - PY40120
07 PAZ - 0010100
07RAB - TB4010A or
07RAB.TB40lOB
07sAz - 001000A
07406 - 0020400
07406 - 0070300
07736 - 4010008 or
07736 - A010004
07746 - 0010100
07746 - 0010200
07746 - 0010400
07746 - 0010500
07746 - 0010600
07746 - 0030100
07746 - 0030400
07749 - 0010000
07947 - SD90200Seal Driver Aftachment
1
1
1
1,l
1
I
2
1'l
1
I
1
1
1
1
1
1
I
1
14-181 , 254
14-216,219
14-189't4-236,242,245,246
't 4-225, 241
14-237
14-216,2't9
14-161
14- 161
14-57
14-236,242,245,246
14-58, 157
14-161
14-161'14-229,230
14-211, 2't2
14-231
14-239
14-212, 227 , 228,229, 230, 238,
14-239, 249
14-221 ,229't 4-207 , 223,226, 237 , 241
14-237,241
1 +21 1, 2't2, 225, 227, 228, 229,
14-230, 237 , 238, 239, 24't, 249't4-225
lf the top arm is too short, replace it with 07SAC - pOZ01OO1.
07HAE - PL50101 may be used to substitute one of these tools.Must be used with commercially available 3/8"-16 slide hammer.
E----G
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14-2
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Pressure Testing
Changing
NOTE: Keep all foreign particles out of the transmis-
sion.
1. Bring the transmission up to operating temperature
(the radiator fan comes on) by driving the vehicle.
Park the vehicle on level ground. turn the engane
off. then remove the drain Plug.
NOTE: lf a cooler flusher is to be used, see page
14-264 and 14-265.
TRANSMISSIONEND COVER
DRAIN18 x 1.5 mmSEALING WASHEBReplace.49 N.m {5.0 kgt.m, 36 lbf.tl)
Reinstall the drain plug with a new sealing washer,
then refill the transmission with the recommended
fluid to the uDper mark on the dipstick. Always use
Genuine Honda Premium Formula Automatic
Transmission Fluid (ATF) Using a non-Honda ATF
can affect shift quality.
Automatic Transmission Fluid Capacity:
4WD;
2.9 { (3.1 US qt. 2.6 lmp qt) 8t change
5.8 ? {7.2 US $, 6.0 lmp qt} at ovethaul
2WD:
2.7 | l2.S US qt,2.1lmp qtl ai change
5.9 ? {6.2 US $, 5.2 lmp qtl at ovolhaul
2.
a
a
1.
Wlrile testing, be careful of the rotaling wheols.
Mako sure lifts, iacks, and safety stands ar€ placed
properly (see scction 11.
Before testing, be sure the transmission fluid is
filled to the proPer level.
4WD:
Raise the vehicle (see section 11.
2WD:
Raise the front of the vehicle, and make sure it is
securely supported. Set the parking brake, and block
both rear wheels securely.
Allow all four wheels {4WD) or front wheels (2wD}
to rotate freely.
Warm up the engine (the radiator fan comes on),
then stop it and connect the tachometer.
Connect the oil pressure gauges to each inspection
hole securely, and do not allow dust or other foreign
particles to enter the inspection holes.
TOROUE: 18 N'm ll.8 kgf'm, 13 lbf'ft)
5.
A/T PRESSURE HOS€,2210 mm07MAJ - PYiOllA
{4 Requircd}
,4'/"' ,a
W'
A/T PRESSURE HOSEADAPTER07MAJ - PYt0120(il Rcquiledl
6. Measure the following Pressure:. Line Pressure ..........,14-162
. 1st. 1st-hold Clutch Pressure .............'. 14-162
. 2nd,3rd and 4th Clutch Pressure .......... 14-163
7. Install new sealing washers and the sealing bolts in
the inspection holes, and tighten to the specified
toroue.
(cont'd)
A/T OIL PRESSUREGAUGE SET W/PANEL07{06 - 0020400
/4\\-J-- (
+..\.-.\-'-\
A/T LOW PBESSUREGAUGE w/PANEL07406 - 0070300
TOROUE: 18 N'm 11.8 kgf'm, 13 lbf'ft)
14-161
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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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Description
Hydraulic Flow
Forward Start and Acceleration l4WD)During a forward start and forward acceleration, the dual pump system can engage four wheel drive.lf the front wheels spin faster than the rear wheels, the front oil pump spins faster than the rear oil pump. The front pump
draws fluid through check valve B and discharges it. Some of the discharged fluid is drawn in the by the rear oil pump.The remaining fluid will pass through check valve E into the clutch piston. There, hydraulic pressure is regulated by twoorifices.
The regulated hydraulic pressure at the clutch piston pushes the plates and discs of the clutch together to form a connec-tion. The engaged clutch then passes driving force from the transfer assembly to the rear wheels, producing 4WD.
oRrFtcEsFRONT OIL PUMPREAR OIL PUMP
Forward Driving at Constant Speed lzWD)When driving forward at a constant speed (cruising), the dual pump system functions in two wheel drive mode.The rotation speed of the front and rear wheels is the same, so the speed of the front and rear pumps is also the same.Fluid discharged by the front oil pump is drawn in by the rear oil pump and is circulated through the system. Becausethere is no pressure built up at the clutch piston, the clutch does not engage, and the vehicle remains in 2WD (front wheeldrive).
FRONT OIL PUMP
15-6
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