Ho2s HONDA CR-V 1999 RD1-RD3 / 1.G Owner's Guide

PGM-FI System
Heated Oxygen Sensor IHO2S) Heater (cont'd)
{'97 model)
(From page l1-121)
PRIMARY HO2S (S.nsor 1) ap CONNECTOR{cl111
| 112 ||.i-l
13 .l
'ot X-tErK/ (9YELI -L
Wire side of female terminals
SECONDARY HO2SISENSOR 21 4P CONNECTORlcr21l,
IGl IBLK/WHTI
Wire side ol female terminals
Wire side of female terminals
So2HTCIALK/WHTI* PO2SHTCIBLK/WHTI
Chock for en open or lhort in thewire (lG1 line):Measure voltage between theHO2S 4P connector terminal No.3 (secondary: No. 4) and bodyground,
Reprir op6n or 3hort in thc wircbetwo.n th€ No. 15 ALTERNA-TOR SP SENSOR (7.5 Al fu!. rndtho HO2S (Primary. Socond.ry*).
Ch€ck for an open in the wire(PO2SHTC, SO2SHTC. lin€):1. Turn the ignition switch OFF.2. Reconnect the HO2S 4P con-
3. Disconnect the PCM connec-tor A (32P).4. Turn the ignition switch ON (ll).5. Measure voltage betweenPCM connector t€rminals 46and A10 (A5 and A10)*.
Bepair opon in the wiro botwoonthe PcM (A6. A5lr and tho Ho2s{Prim.ry, Socond!ryr}.
ls thero 0.1 V or less?
Substitute a lnown-good PCMand recheck. lt 3ymptom/indica-tion goes away, .oplaco the origi-nal PCM.
Check fo. a ahort in the wireIPO2SHTC, SO2SHTC. lins):1. Turn the ignirion switch OFF.2. Disconnect the PCM con-nector A {32P).3. Check lor continuily betweenthe PCM connector terminal46 (A5)* and body ground.
Bopair short in the wire lrotwsentho PC{r4 {A6, A5rl and the HO2SlPiimary, S€condary.l.
Substitute a known-good PCMand .echgck. lf 3ymptom/indica-tion go€s awry. repl.cethe origi-nal PCM.
11-122
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Check for an open in the witoa(lGP,lGl'lino):
Mgasure voitage between the pri-
mary HO2S 4P connector terminalNo. 3 (secondary HO2S: No. 4) andbody ground.
Bepair opan or short in tho wilobdtween th6 nlo. 15 ALTERNATORSP SENSOR 17.5 Al fu$ .nd th6HO2S {Primrry, S€condtrytl.
Chock lor sn opon in the wires
IPO2SHTC, SO2SHTC' lincl:1. Turn the ignition switch OFF.2. Reconnect the HO2S 4P con-nector.3. Disconnect the ECM/PCM con-nector C (31P) (ECM/PCM con-neaor A (32P))*.
4. Turn the ignition switch ON (ll).
5. Moasure voltage betweenECM/PCM connector terminals82 and Cl (82 and A8)*.
Repsir opsn in tha wire betweentho ECM/PCM (C1, A8.) .nd theHO2S lPrimsry, Socond.ry*}.ls there 0.1 V or less?
Sub.titute a known-good ECM/PCM and rocheck. lf iymptom/indicrtion goes away, repbcethe original ECM/PCM.
('98 - 00 models)
Wire side of female terminals
ECM/FCM CONNECTORS
IGl IBLK/WHT}
PRIMARY HO2S {S.n3or 1l aP CONNECTOR
lc111l
11 2l
r--T -l3t.lL-.IJ------J
lcl /5'tErK/ g,YELI I
Wire side of female terminals
SECONDARY HO2S
{SENSOR 2} 4P CONNECTOR(c7211'
PGl (BLK}
lFrom page 11-12'!)
Chock lor a short in the wi.es(PO2SHTC, SO2SHTC' linol:1. Turn the ignition switch OFF.2. Disconnect the EcM/PcM con-nector C {31P) lECM/PCM con-nector A (32P))*.
3. Check for continuity betweenECM/PCM connector terminalCl (A8)* and body ground.
Roolir 3hort in th. wiro betwoonthe ECM/PCM lC1, A8'l and theHO2S (Primary, S6condary*).ls there continuity?
Sub3tituie s known-good ECM/PCM and rech6ck. It symptom/indicaiion goes away. lgplacoth6 origin.l ECM/PCM.
Wire side of lemale terminals: P0'14'l
11-123
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PGM-FI System
Fuel Supply System
[POliil The"""ntool indicates Diagnostic Troubte Code (DTC) p0'171:Thefuet system istoo lean.
[Fo17ZJ rh""""ntool indicates Diagnostic Troubte code {DTc) p0172:Thefuel svstem istoorich.
Description
By monitoring the Long Term Fuel rrim, long term malfunctions in the fuel system will be detected.lf a malfunction has been detected during two consecutive trips, the MIL will come on and DTc p0171 and/or pol72 will bestored.
NOTE: lf someof the DTCS listed below are stored atthesametimeas DTC P017'l and/or p0172, troubleshoot those DTcsfirst, then troubleshoot DTC P0171 and/or PO1i2.
P0107, P0108, P1128, P'1129: MAP Sensor
P0135: Primary HO2S (Sensor 1)Heater
P0137, P0138: Secondary HO2S {Sensor 2)P0141: Secondary H02S (Sensor 2) Heater
P0441*r: EVAP System lnsufficient Purge FtowP1456*,, P'l457 *?i EVAP System Insufficient purge Ftow
Possible Cause
DTC P0171
too lean
*1: '97 model*2: '98 - 00 models
Fuel Pump insufficient flow/pressure
Fuel Feed Line clogged. leaking
Fuel Pressure Regulator stuck openFuel Filter clogged
Fuel Injector clogged, air leakage
Gasoline doesn't meet Owner's Manual spec.Primary HO2S (Sensor 1) deteriorated
Valve Clearance
Exhaust leak
Fuel Pressure Regulator clogged, stuck closedFuel Return Pipe clogged
Fuel Injector leaking
Gasoline doesn't meet Owner's Manual spec.Primary H02S (Sensor 1) deteriorated
EVAP Purge Control Solenoid Valve leaking, stuck openedValve Clearance
DTC P0172
flch
11-124
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Troubleshooting Flowchart
- The MIL has been rePorted on- DTC P0171 andlot P0172 are
stored,
Check the lu6l pressuro regulator
and tusl relum PiPe.ls the lLrel pressure too high
Check lhe Primaty HO2S:1. Start the engine. Hold the
engine at 3,000 rpm with no
load (in Park ot neutral) until
the radiator fan comes on
2. Check the Primary HO2S(Sensor 1) outPut with the
scan tool.
Check lh€ fuel pumP. fuel faedpipe. fuel fiher, and luel Prossurc.eguhior.
Does it stay at lessthan 0.3 V
or more than 0.6 V?
Check for a sticking or leaking
EVAP purge control solenoid
With a vacuum pump, aPPIY vacu
um to the EVAP Purge control
solenoid valve from the intake
manifold side.
Does it hold vacuum?
Check th6 valve clearanc€s and
adjust il necessary. It the valv€
clearances are OK, replace the
fuel iniectors.
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PGM-FI System
HO2S Replacement
1. Disconnect the HO2S 4P connector, and remove the
HO2S.
PRIMARY H02S:
PRIMARY HO2S4P CONNECTOR
02 SENSORWRENCH
PRIMARYHO2S44 N.m{4.5 kgt m,33lbf.ftl
SECONDARY HO2S:
SECONDARY HO2S4,0 N.m (4.5 kg{.ft, 33 lbtftl
2. Install the HO2S in reverse order of removal.
11-148
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Emission Control System
Three Way Catalytic Converter {TWCI (cont'd}
1P0420 Thescantool indicates Diagnostic Trouble Code (DTC) P0420: Catalyst system efficiency belowthreshold.
DescriDtion
This system evaluates the catalyst's capacity by means of the HO2S (Primary and Secondary) output during stable driving
conditions. lf deterioration has been detected during three consecutive driving cycles, the MIL comes on and DTC P0420 will
be stored.
NOTE: lf some of the DTCS listed below are stored at the same time as DTC P0420, troubleshoot those DTCS first. then
troubleshoot DTC P0420.
P0137, P0138: Secondary HO2S (Sensor 2)
P0141: Secondary HO2S (Sensor 2) Heater
Possible Cause
. IWC Deterioration
. Exhaust system leakage
Troubleshooting Flowchart
- The MIL has been reDoried on.- DTC P0420 is stored.
Problem verification:1. Do the ECM/PCM Reset Procedure,2. Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutrali untilthe radiator fan comes on.3. Connect the SCS service connector.4. Test-drive 40 - 55 mph (64 - 88km/h) for approx. lwo minutes.Then decelerate for at least 3seconds with the throftle completely closed. Then reducethe vehicle speed to 35 mph
156 km/h), and try to hold ituntil the readiness code
Intermittent tailure. system is OKat this time.ls DTC P0420 indicated?
Check the TWC (see section 9).lI nocessary, replace the TwC.
11-200
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Removal
!@@ Make sure the lifts, i8cks. and safety stands
are placed properly {see section 1}.
1. 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. Drain the manual transmission fluid Reinstall the
drain plug with a new sealing washer.
4. Disconnect the heated oxygen sensor (HO2S) con-
nector.
SELF.L(rcKNGNUTReplace.
SELF-LOCKI'{GNUTReplac€.
5. Remove exhaust oipe A.
6. Make reference marks across the propeller shaft
and the transfer assembly flanges'
Separate the propeller shaft from the transfer
assembly flanges,
Remove the rear stiffener, then remove the transfer
assembly.
NOTE: While servicing the transfer assembly, do
not allow dust or other foreign particles to enter the
transmission.
7.
REFEREI{CE i'ARKS
Replace.
Replace.
13-5
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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. Disconnect the heated oxygen sensor (HO2S) con-
nector, then remove the exhaust pipe A.
GASKETReplace.
HO2S CONNECTOR
NUTReplace.
EXHAUST
SELF.LOCKINGReplace.
GASKETReplace.
Mark reference marks on the joint of the transfer
and the propeller shaft.
8 x 1.25 mmReplace.
Separate the propeller shaft from the transfer
assemDly.
REFERENCE MABKS
14.
15. Remove the cotter pins, and castle nuts. then sepa-
rate the ball ioints from the lower arm (see sectlon
18).
OAMPER PINCH BOLT
CASTLE NUTNUTReplace.
17.
16.
DAMPER FORKFOFKEOLTReplace.
Remove the right damper tork bolt, then separate
right damper fork and damPer.
Pry the right driveshaft out of the differential, and
pry the left driveshaft out of the intermediate shaft
(see section 18).
Pull out the inboard ioint, and remove the right and
left driveshaft (see section 18).
Tie plastic bags over the driveshatt ends. Coat all
precision finished surfaces with clean engine oil
18.
19.
\
{cont'd}
13-9
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Transmission Assembly
Installation (cont'dl
13. Installthe balljoints onto the lower arms.
DAMPER PINCH BOLT10 x 1.25 mm43 N.m {a.a kgf.m,32 rbfft)
SELF.LOCKING NUT'12 x 1.25 |nm6il N'm 16.5 kgtin, 47 lbtftlReolace.
Replace.
14.
PROPELI"ER SHAFT
13-74
12 x 1.25 mm,19 - 59 N.m(5.0 - 6.0 kgi.m, 36 - € lbfttl
Install the right damper fork bolt.
Install the propeller shaft to the transfer assembly
by aligning the reference marks.
E x 1.25 mr'|
15.
REFERENCE MARKS
32 N.m 13.3 kst m, 2a lbf.ftl
TRANSFER
Install the exhaust pipe A, then connect the heated
oxygen sensor (HO2S) connector.
GASKETSReplace.
HO2S CONNECTOR
10 x 1.25 mm5,1N.m 15.5 kgtm.() tbt filReplace.
SELF.LOCKING
SELF.LOCKING NUT8 x 1.25 mm16 N.rn 11.6 kg{.m,12lbtfr)Replace.
GASKETReplace.
8 x 1.25 rr|ln22 N.m (2.2 tgf.m, 16 lbl.ftlReplac6.
'17. Installthe guard bar and the splash shield.
SPLASH SHIEI.I)I x 1.25 mm24 N.m l2.a kgf.m.17 tbtft)GUARD BAR
6x1.0mm9.8 N.m (1.0 kgf.m, 7.2 lbf.ft)
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