Pgm- fi HONDA CR-V 1999 RD1-RD3 / 1.G Owner's Manual

PGM-FI System
(From page 11-107)
Check lor an open in the wirc(SG2line):
Measure voltage between ECM/PCM connector C (31P) terminalsC18 and C28.
Ropair open in th€ wire betweonrhe ECM/PCM (Cl81 .nd the TP56nSOl,
ls there approx. 5 V?
Substitute a known-good ECM/PCM and rocheck. lf pre3cribedvoltago is now avaibble, replacetho origin.l ECM/PCM,
Throttle Position (TP) Sensor (cont'dl
ECM/PCM CONNECTOR C {31PI
Wire side of temale terminals
1 1-108
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PGM-FI System
Primary Heated Oxygen Sensor (Primary HO2S) (Sensor 1)
The Heated Oxygen Sensors (HO2S) detect the oxygen content in the exhaust gas and signal the ECM/PCM. In operation,
the ECM/PCM receives the signals from the sensor and varies the duration during which fuel is iniected. To stabilize the
sensor's output, the sensor has an internal heater. The Primary HO2S (Sensor 1) is installed in exhaust pipe A.
HO2S:
ztRcoNtAEI.IMENT
s€NsoRTERMINALSVOLTAGE IVI
HEATEBTERMINALS
The scan tool indicates Diagnostic Trouble Code (DTC) P0131: A low voltage
Oxygen Sensor (HO2S) {Sensor 1} circuit,
RICH - AIR. . LEANFUELNATO
problem in the Primary Heated
37 - 98 models:
HEATER
The MIL has been reoorted on.DTC P0131 is stoied.
Problem verification:1. Do the ECM/PCM Reset Pro-ceoure.Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on.Test-drive with the A/T in Eposition (M/T in 4th gear)Check the Primary HO2S{Sensor 1} output voltage withthe scan tool during accelera-tion using wide open throttle.
Intermittent f.ilure, system is OKat this time. Check fo. poor con-nections or loose wirer at C111(Primary HO2S, SeGor 1) and atrh€ ECM/FCM.
Check the fuel pressure (see page
11-178).
Repair the fuel supply system.
{To page 11'111}
1 1-1 10
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PGM-FI System
'99 - 00 models:
- The MIL has bsen reported on.- DTC P0131 ir storod.
Problem ve fication:1. Do the ECM/PCM Reset Pro-cedure,2. Start the engine. Hold theengine at 3,000 rpm with noload {in Park or neutral) untillhe radiator tan comes on.3. Check the Primary HO2S(Sensor 1) oltput voltage withthe scan tool during accelera-tion using wide op€n throttle.
Inl.rmittant failura, 3yrtam i! OKat thb tim.. Ch.ck tor poor con-nectiona oa looaa wlraa al C111{Pri|n.ry HO2S, Son3or 1l .nd .ttho ECM/FCM,
Does the voltage stay at 0.5 Vor less?
Check tho fuel pressure (see pago1r,178).
R.p.ir th. fu€l lupply ry!t.m.
Chock lor a short in tho HO2S:1. Turn the ignition switch OFF.2. Disconnect the Primary HO2S(Sensor 1) 4P connector.3. St6rt the engine and lot it idle.4. Check the Primary HO2S(Sensor 1) output voltage withthe scan tool,
Does it stay 6t 0.5 V or less?Rephc. th6 HO2S (S.n3or 11.
Chock for a short in tho wirc(PHO2S lino):1. Turn the ignition switch OFF.2. Disconnect the ECM/PCM con-nector C (31P).
3. Check tor continlity betweenthe Primary HO2S {Sensor 'l}
4P connector terminal No. Iand body ground.
Ragah rhort in tha wira balwoanth. ECM/PCM {Cl61 rnd thcPrirn.ry HO2S (S.n3or 11.
Substltut6 a known-good ECM/PCM and recheck. lf rymptom/indicrtion 00os away, raplaco thcoriginal ECM/PCM.
Primary Heated Oxygen Sensor (Primary HO2SI (Sensor 1l (cont'd)
PRIMARY HO2S (Son.or 1l aP CONNECTOR |C111)
PHO2S T--1rwHTr f-T---]
--1 1 2lI t--- 1t6)lslrlv L__r__J
_L
Wire side ol female terminals
11-112
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PGM-FI System
Primary Heated Oxygen Sensor lPrimary HO2S) {Sensor 1} {cont'dl
(From page'11-l13)
ECM/PCM CONNECTOR C {31PI
11-114
Ch.ck for an open in the wire(PHO2S linel:1. Turn the ignition switch OFF.2. Connect ECM/PCM connectorterminals C16 and C18 with a
3. Turn the ignition switch ON {ll).4. Check the Primarly H02S(Sensor 1) output voltage withthe scan tool.
R€p.ir open in the wire bqtw€enthe ECM/PCM (C161 and th€Primary HO2S (Sen.or'l).ls there 1,0 V or more?
Substitute a known-good ECM/PCM and rach€ck. lt 3ymptom/indication goos away, replacethe origin.l ECM/PCM.
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PGM-FI System
Primary Heated Oxygen Sensor (Primary HO2S) lSensor 1) (cont'd)
tFO133 lhe scan tool indicates Diagnostic Trouble Code (DTC) P0133: A slow response problem in the Primary Heated: Oxysen Sensor (Primarv HO2S (Sensor 1) circuit.
Description
By controlling the airlfuel ratio with a Primary HO2S (Sensor 1) and a Secondary HO2S (Sensor 2), the deterioration of the
Primary HO2S (Sensor 1) can be evaluated by its feedback period. When the feedback period of the HO2S exceeds a cer
tain value during stable driving conditions, the sensor will be judged as deteriorated.
When deterioration has been detected during two consecutive trips, the MIL comes on and DTC P0133 will be stored.
NOTE: lf DTC P0131, P0132 and/or P0135 are stored at the same time as DTC P0133. troubleshoot those DTCS first, then
troubleshoot DTC P0133.
Possible Cause
. Primary HO2S (Sensor 1) Deterioration
. Primary HO2S Heater (Sensor 1) Deterioration
. Exhaust system leakage
Troubleshooting Flowchart
- The MIL has b6€n reoorted on.- DTC P0133 is stored.
Problem Verilication:'1. Do the ECM/PCM Reset Procedure.2. Connect the scan tool.3. Start the engine. Hold theengine at 3,000 rpm with noload lin Park or neutrali untilthe radiator fan comes on.4. Connect the SCS service connector.5. Test-drive under the followingcondations,55 mph (89 km/h) steadyspeed- M in @ position (E position and Over Drive ON)*,(M/T in sth gear)- Until readiness code comes
Intermittent failure, system is OKat this time. Check tor poor con-nections or loose wires at C111(Primary HO2S, Sensor 1) and althe ECM/PCM.
Replace the Primary HO2S {Sen-sor 11.
1 1-1 16
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PGM-FI System
Secondary Heated Oxygen Sensor (Secondary HO2SI (Sensor 2l (cont'dl
The scan tool indicates Diagnostic Trouble Code (DTC) P0138: A high voltage problem in the Secondary Heated
Oxygen Sensor (Secondary HO2S) (Sensor 2) circuit.
SECONDABY HO2S (Sonror 2)1P CONNECTOR rC721 l
sHo2s{WHT/REDI
sH()2sGIGFN/WHTI
Wire side of female terminals
PCM COI{NECTOR D {16PI
sHo2sG(RED/YELI
JUMPER WIRE
Wirc side ol lemale terminals
{To page 11-119)
1 1-1 18
The MIL hra b€on Eported on,OTC m138 b stor.d.
PJoblcm v6dtic.tion:1. Do the ECM/PCM Resot Pro-cedure,Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutral) trntilthe radiator lan comes on.Check the Secondary HO2S(Sensor 2) outpl.rt voltage at3,000 rpm with the scan tool.
Int.rmitto tailurc, syst.m b OKrt ihi! timo. Chack fo. poo. oon-noctioni or looaa wiiaa at C127lloc.ted on EcM/PcM br.cket),C721 (Second!ry llO2S, Sonlol2).nd at th. ECM/PCM.
Does the voltage stay at 0.6 Vor more?
Chock for an opon in the SocondaryHO2S:1. Turn the ignition switch OFF.2. Disconnect the SecondaryHO2S (Sensor 2) 4P connector.3. Connect the Socondary HO2S(Sensor 2) 4P connector ter-minals No. 1 and No. 2 with a
4. Turn the ignition switch ON {ll}.5. Check the Secondary HO2S{Sensor 2) output voltage withthe scan tool.
ls there 0.6 V or more?
Ch6ck for an open in thg wiro3(SH()2S, SG2 line3l:1. Turn the ignition switch OFF.2. Connect rcM connector termi-nals 014 and D13 with a
J!mper wite.3. Turn the ignition switch ON (ll).
4. Check the S€condary HO2S(S€nsor 2) output voltagewith the scan tool.
Rapair op6n in tho wir. b€{woantho PcM lDla or Dl3l .nd thoS.condlry HO2S {Senlor 21.
lsthere 0.6 V or more?
('97 model)
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PGM-FI System
Secondary Heated Oxygen Sensor (secondary HO2SI (sensor 2l (cont,d)
lTol3al The scan tool indicates Diagnostic Trouble Code (DTC) P0139: A slow response probtem in the Secondary Heated- Uxygen Sensor (HO2S) (Sensor 2l circuit.
- The MIL has b€en reoorted on.- DTC P0139 is storad.
Probl€m ve.itication:1. Do the ECM/PCM Reset Procedure,Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on.Check the Secondary HO2S(Sonsor 2) output at 3,000 rpmwith the scan tool.
lntehittont failure, 3ystem is OKat this time. Chock for poor con-nections o. loose wi.es at C127(located on ECM/PCM brack€t),C721 {Secondary HO2S, Sensor 2land at the EcM/PcM.
Does the voltage stay within0.3 - 0.6 V for two minutes?
11-120
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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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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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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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