1997 HONDA CR-V air con

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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(From page 11-118)
Check for an open in tha wire
ISH()2S linel:1. Turn th€ ignition switch OFF.2. Connect ECM/PCM connectorterminals A23 and C18 with a
iumper ware.3. Turn the ignition switch ON (ll).
4. Check the Secondary HO2S(Sensor 2) output voltage withthe scan tool.
Repair opon in tho wire botwaenthe ECM/PCM lA23l and theSecond.ry HO2S (Sonsot 21.ls there 0.6 V or more?
Substitute a known.good ECM/PCM .nd recheck. It symptom/indication goes rway, replace
the origin.l ECM/PCM.
('98 - 00 models)
ECM/PCM CONNECTORS
A l32Pl
Wire side of fomale terminals
L _._._ _ _I
SHO2S W}iT/RED) | JUMpER W;RE
(cont'd)
1 1-1 19
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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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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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Misfire Detected in One Cylinder
Ipffi1] Thescantoot indicates Diagnostic Trouble Code (DTC) P0301: Cylinder 1 misfire detected.
lF03O2l 16".""n toot indicates Diagnostic Trouble Code (DTC) P0302; Cylinder 2 misfire detected.
I P0303 | fne scan tool indicates Diagnostic Trouble Code (DTC) P0303: Cylinder3 misfire detected.
lF0il04l 16" ""un tool indicates Diagnostic Trouble Code (DTC) PO3O4: Cylinder 4 misfire detected
Description
Misfire detection is accomplished by monitoring the crankshaft speed with the crankshaft speed fluctuation (CKF) sensor
which is attached to the crankshaft.
lf misiiring strong enough to damage the catalyst is detected, the MIL will blink during the time of its occurrence. and DTC
P0301, P0302, P0303 and/or P0304 will be stored. Then, after the misfire has ceased, the MIL will come on.
lf misfiring that increases emissions is detected during two consecutive driving cycles. the MIL will come on, and DTc
P0301, P0302, P0303 and/or P0304 will be stored.
NOTE: lJ some of the DTcs listed below are stored at the same time as a misfire DTc, troubleshoot those DTcs first, then
troubleshoot the misfire DTC.
P0107, P0108, P'n2a, P1129t MAP sensor
Po'17 'l , P0112t Fuel suPP|Y system
P0441: EVAP insufficient Purge flow
P1336, P1337: CKF sensor
P1359, Pl361, P1362: TDC sensor
Pl381, P1382: CYP sensor
Possible Cause
. Fuel injector clogging, fuel leakage, air leakage
. Fuel injector circuit open or shorted
. Spark plug carbon deposits, fouling, malfunction
. lgnition wires open, leaking
. Distributor malfunction
. Compression low
. Valve clearance out of specification
(cont'd)
11-127
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PGM-FI System
Knock Sensor {KSl
('99 - 00 models) The scan tool indicates Diagnostic Troublo Code (DTC) P0325: A malfunction in the circuit ofthe Knock Sensor (KS).
ECM/PCM CONNECTOR C 131P}
Wire side of female terminals
KS 1P CONNECTOR IC13?'
KSIRED/BLU)
KS(BED/BLU)
Wire side ol femaletermtnals
ECM/PCM CONNECTORc (31P)
- The MIL has been rooorted on.- DTC m325 is storod.
Problem verification:1. Do the ECM/PCir, Reset Procedure,2. Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator tan comes on,then let it idle.3. Hold the engine at 3,000 -
4,000 rpm for at least 60 sec-onds,
Intermittent lailu.e, 3ystom is OKat thi3 tim. (te3t drive m.y benacalLrYr.Chock to. poor connsctions olloora wiros rt C137 lknock aon-.o. (KS)) and ar the ECM/FCM.
Ch€ck tor a short in the wir6 {KSlinel:1. Turn the ignition switch OFF.2, Disconnect the knock sensorlP connector.3. Check lor continuity betweenECM/PCM connector terminals C3 and body ground.
Replil rhort in the n irg b6{wocntho ECM/PCM lc:ll and the knocks€ngr1.
Check fo..n open in the wire{KS line):Check for continuity betweenECM/PCM connector terminal C3and knock sensor connector ter,minal No. 1.
B.pair opon in the wirc lrotweenlho ECM/PCM lctl and thc knockacnsor.
ls there cont;nuity?
Substitute a known-good knocksensor and recheck.
ls DTC P0325 indicated?Bcpl.ce the original knock 3€nsor,
Substituto a known-good ECM/PCM and .echeck. lf 3ymptom/indication goes away, replacethe original ECM/PCM.
NOTE: Torque the knock s6nsor to31 N.m (3.2 kgl.m, 23 lbf.ft).
1 1-130
Wire side ot female terminals
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PGM-FI System
Grankshaft Position/Top Dead Center/Cylinder Position (CKP/TDC/CYPI
Sensor (cont'd)
DISTRIBUTOR10P CONNECTOR tCl2l)CKP P
IBLUITDC P {GRNI
PCM CONNECTORS C I31P)
CKP P TDC P CYP PIBLU) IGRNI IYEL}
Terminal side ofmale terminals
IREDI IBLK)
Wire side offemale terminals
{WHT)
{From page 1'1-131)
Check for a short in the CKP/TDC/CYP sensor:Check for continuity to bodyground on both terminals of theindicated sensor individually (see
table on page 1l 131).
R€plac€ the distributor ignitionhousing {see section 4}.ls there continuity?
Ch€ck fo. an open in the wires{CKP/TDC/CYP lines):'1. Reconnect the distributor 10Pconnector.2. Disconnect PCM connector C(31P).
3. Measure resistance betweenthe terminals of the indicatedsensor on the PCM connectorlseetable on page 1l 131).
Repair open in the indicated sen-sor wires {se6 table on page 11-131).ls there 350 - 700 0?
Check tor a short in the wires{CKP/TDC/CYP linesllCheck for continuity betweenbody ground and PCM connectorterminals C2, C3 and/or C4 individ-
R€Dair short in the indicatod sen-sor wires lsee table on page 11-13rI.ls there continuity?
Substitute a known-good PCM,and recheck. lf symptom/indica-tion goes away, r€place lhe origi-nal PCM.
CKP P TDC P CYP P
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