Ä°gnition 9p connector HONDA CR-V 1998 RD1-RD3 / 1.G Repair Manual

PGM-FI System
Elestrical Load Detector (ELDI (USA Modell
The scan tool indic€tes Diagnostic Trouble Code (DTC) P1297: A low voltage problem in the Electrical Load
Detector (ELD) circuit.
'97 model:
ELD 3P CONNECTOR {C354I
--+-l1L2l3l
ler-
O) tcnrulaeot
Y
Wire side ot female terminals
PCM CONNECTOR D I16P)
Wire side of female terminals
Problem vsriticltion:1. Do the PCM Feset Procedure.2. Start the engine.3. Turn on the headlights.
Intormittent lailuic, 3vstom k OKat thk time. Ch.ck tor poor con-nections or loose wiro3 at C127(loc.ted on PCM b.sckot), C354{ELO, .nd at tho FCM.
ls DTC P1297 indicated?
Ch.ck for 3hort in lho ELD:Measure voltage between bodyground and the ELD 3P connectorterminal No.3.
ls there approx. 4.5 V?
Check for a short in tho wire IELlinel:1. Turn the ignition switch OFF.2. Disconnect PCM connector D(16P).
3. Check for continuity betweenbody ground and PCM connector terminal D16.
Rcpair 3hort in tho $rire botwo€nthe PcM lDl6l and tho ELD.
Substituto a known-good PCMand rocheck. lf 3ymptom/indic.-tion goos !w!y, repl.ce the origi-nal PCM.
1 1-138
www.emanualpro.com

98 - 00 mod6l3:
- OTC P l1€7 is 3tored.
Problcm vcrificrtion:1. Do the ECM/PCM Reset Pro-cedure,2. Start the engine.3. Turn on the headlights.
Intcrmittent tailuro, ryrtom ir OK!t thi3 timo. Ch.ck tor poor con-nectiont or looao wire! at CXl54IELD) rnd at rh6 ECM/PCM,
ls DTC P1297 indicated?
Chock for 3hort in tho ELD:Measure voltage between bodyground and the ELD 3P connectorterminal No.3.
ls there approx. 4.5 V?
Chcck lor a 3horl in tho wiio (EL
linol:1. Turn the ignition switch OFF.2. Disconnect ECM/PCM con-nector A (32P).
3. Check for continuity betweenbody ground and ECM/PCMconn€ctort€rminal A30.
Ropair shon in thc wira botwocntho PcM (A301 rnd rho ELD.
Sub.tituto a known.good ECM/PCM .nd rocheck. ll lymptom/indication gocs .w!y. replsceth6 o.iginal ECM/PCM,
ELD 3P CONNECTOR ICAs4I
f_l,I 2l3l-
l--- r'.
&) iGRN/RED)
T
Wire side of temale terminals
ECM/PCM CONNECTOR A I32P)
Wire sid6 of female terminals
(cont'd)
-13911
www.emanualpro.com

PGM-FI System
Electrical Load Detestor (ELDI (USA Model) (cont'dl
The scan tool indicates Diagnostic Trouble Code {DTC) Pl298; A high voltage problem in the Electrical Load
Detector (ELD) circuit.
97 modsl:
ELD 3P CONNECTOR {C35,'I
Wire sido oI lemale terminals
r lzlrl--T_ow
/6 IBLKI
Y
Repail op€n in th. wire b€tws€ntho No. 15 ALTERNATOR SPSENSOR 17.5 A) tuse in theunder-dlrh fuso/r.lay box andth6 ELD.EL {GRN/NEDI
PCM CONNECTORS
Problam verification:1. Do the PCM Reset Procedure.2. Start the engine.3. Turn on the headlights.Intermittent tailuro, systcm is OK.t this time. Chack for ooor con-noction! or looro wire3 at C127{locaied on PCM brackot), C35{{ELDI and .t tho PCM.
Chack for an opan in tho wilellGl linol:1. Turn thg ignition and head-lights OFF.2. Disconnect the ELD 3P connector.3. Turn the ignition switch ON {ll).4. M6asure voltage b€tw€enbody ground and the ELD 3Pconnoctor terminal No. 1.
Chock lol !n open in the wireIGND linel:'1. Turn the ignition switch andheadlights OFF.2. Disconnect the ELD 3P conneqor,3. Check for continuity betweenbody ground and the ELD 3Pconnector terminal No. 2.
Ropair opon in th6 wi.e betweonth. ELD connector rnd GiO2,
Ch.ck lo. an open in th€ wiro (EL
line):Check for continuity between theELD 3P connector terminal No. 3and PCM connector terminal 016.
Chock for . malfunction in theELD:1. Reconnect the ELD 3P con-neclor,2. Start the engine and allow itto idle.3. While measuring voltagebetween PCM connector terminals 016 and A9. turn theheadlights on (low).
ls there continuityT
R6pafu op6n in tho wire betweenthe PCM {D161snd th6 ELD.
Subltituto . known-good PCMand rachock, f symptom/indic.-tion goes awry, ropl.ce the origi-n.l PCM.
Does the voltage drop?
Wire side of lemale terminals
11-140
Wire side of lemale terminals
www.emanualpro.com

38 - 00 modeb:
Problem verification:1. Do the ECM/PCM Reset Proceoure.2. Stan the engine.3- Turn on the headlights.Intermittent feilure, sysl.m is OKat this time. Check for ooor con-nections or loose wires at C354(ELDI and at the ECM/PCM.
ls DTC P1298 indicated?
Check lor an open in the wire(lG1 line):'1. Turn the ignition and head-lights OFF.2. Disconnect the ELD 3P connector.3. Turn the ignition switch ON (ll).
4, Measu re voltage betweenbody ground and the ELD 3Pconnector terminal No. '1.Reprir open or short in th6 wirebotweon the No. 15 ALTERNA-TOR SP SENSOR {7.5 Al fuse inthe under-drah fuse/relay boxand the ELD.
Check tor an opon in tho wire{GND line}:1. Turn the ignition switch andheadlights OFF.2. Disconnect the ELD 3P connector.3. Check for continuity betweenbody ground and the ELD 3Pconnector terminal No. 2,
Repair opon in the wire betweenthe ELD conneclor and GilO2.
Ched( fo. an op€n in the wir€ (EL linel:Check for continuity between theELD 3P connector terminal No. 3and ECM/PCM connector termi-nalA30.
Repair op€n in tha wile botwecnthe EcM/PCM lA30l .nd rhe ELD.
Check for s malfunction in lhe ELD:1. Reconnect the ELD 3P con-nector.2. Start the engine and allow itto idle.3. While measuring voltagebetween ECM/PCM connectorterminals A30 and 820, turnthe headlights on (low).
Substiiute a known-good ECM/PCM and recheck. It symptom/indication goos away, replacethe original ECM/PCM.
ELO 3P CONNECTOR {c35/rl
Wire side of female terminals
Wire side of female terminals
Wire side ot temale terminals
ELD 3P CONNECTOR {C35,lt
EL IGRN/RED}Wire side of femaletermrnars
ECM/PCM CONNECTORS
A l32P)
11-141
www.emanualpro.com

PGM-FI System
Grankshaft Speed Fluctuation (CKF) Sensor
fF13361l Tj":""l.tool indicates Diagnostic Trouble Code (DTCI P1336: Intermittent interruption inthe Crankshaft Speed: Fluctuation (CKF) sensor circuit.
The scan tool indicates Diagnostic Trouble Code (DTC) P1337: No signal in the Crankshaft Speed Fluctuation (CKF)
sensor circuit.
Description
The diagnostic system has a pulser rotor on the crankshaft and a pulse pick-up sensor on the engine block. The ECM/PCM
monitors the crankshaft speed fluctuation based on the CKF sensor signal, and judges that an engine misfire occurred if
the fluctuation goes beyond a predetermined limit.
37 mod.l:
CKF SENSOR 2P CONNECTOR IClO4I
T:]l-r'r Lll
l1 zLl''''CKF P I lcKF Mtalu/aeot fdJ twxrneor\-7
Terminal side of male terminals
(To page 11-113)
11-142
- Tho MIL ha3 been reported on.- DTC P1336 and/or P1337 arestored.
Problem verificrtion:1. Do the PCM Reset Procedure.2. Start the engine.
Intermittent {ailure, systom is OK.l thia timo. Ch6ck tor poor con-nections or loose wir$ at ClorlICKF sonsorl .nd at tho PCM.
Chock tor an opon in th6 CKF .en'30r:1. Turn the ignition switch OFF.2. Disconnect the CKF sensor 2Pconnector,3, M easure the resistancebetween the CKF sensor 2Pconnector terminals No. 'l andNo.2.
ls there 1.6-3.2 kO?
Check fo. a short in the CKF 3en-sot:Check for continuity betweenbody ground and the CKF sensor2P connector terminals No. 1 andNo.2 individually.
CKF SENSOR
www.emanualpro.com

PGM-FI System
Grankshaft Speed Fluetuation (CKFI Sensor (cont'dl
.98 - 00 modols:
CKF SENSOR 2P CONNECTOR IClO'I
r-:-i-_ltr_- |l1 2ll,,-'CKF P I ICKF MtsLuneotTOl wlrrneo)\7
Terminal side of male terminals
r:l
t! El
.KFP XA"*."talu rneor \:f
f rwxvneor
ECM/PCM CONNECTOR C (31P)
CKF PIBLU/REDI
CKF M(WHT/BEOI
Wi16 side of l6male terminals
1278__l
-lI(o
T
161716't9202122
,/ 2s262728293()3l
M
- The MIL has boon reported on.- DTC P1336 and/or P1337 arestored.
ProblGm verification:1. Do the ECM/PCM Reset Pro-cedure,2. Stan the engine.
Inte.mittant failuro, 3y*om b OKat thb tima. Chack lor ooor con-nections or looso wirea at C10a{CKF sensorl and.t the ECM/PCM,
Chgck forun open in tho CKF son-sori1. Turn the ignition switch OFF.2. Disconnect the CKF sensor 2Pconnector.3. Measure the resistancebetween the CKF sensor 2Pconnector terminals No. 1 andNo.2.
lsthere 1.6 - 3.2 kO?
Check for a short in the CKF sen-
Check lor continuity betweenbody ground and the CKF sensor2P connector terminals No. 1 andNo.2 individually.
Check for an open in the wiresICKF linca):1. Feconnect the CKF sensor 2Pconnector.2. Disconnect ECM/PCM connec-tor C (31P).
3. Measure resistance betweenECM/PCM connector termi'nals C22 and C31.
Repair opon in the wir6 botwoonthe ECM/PCM 1C22, glll lnd th6CKF s6n3or.
ls there 1.6 - 3.2 kO?
(To page 11'1451
11-144
www.emanualpro.com

(From page 11-150)
{From page 11-150}
THERMO VALVE(A/T onlyl
Check the IAC valve:Disconnect the 2P connector from
the IAC valve.
Does the engine speed droP
or the engine stall?
Adiust the (basel idl€ speed lseepage 11-169, 1t0). Itihe ba3e idle
speed cannot be adiust€d, clean
the Dorts in the throttle body.
UPPER
Check the tast idle lhermo valve:
1. Turn the ignition switch OFF.
2. Remove the intake air ductfrom the throttle body.3. Start the engine and let it idle.
4. Put your finger on the lowerpon in the throttle body.
Check engine cool.nt level and for
air in the cooling sy3lem. lf OK,
reolace the f.st idle thermo valve.Does the engine speed drop?
Put your Iinger on the uPPer Portin the throttle body.
Check for vacuum leaks, make
sure the throttle valve is com'pletely clo3ed. and repair as nec-Does the engine speed droP?
Adjust the idle spoed lsee Page11-169. 1701. lf the adiustmentdoes not correct lhe problem,
r.olace the IAC valve.
www.emanualpro.com

ldle Control System
ldle Air Control llAC) Valve
The scan tool indicates Diagnostic Trouble Code (DTC) Pl508: A probtem in the ldle Air Controt flAC) varvecircuit.
The IAC Valve changes the amount of air bypassing the throttle body in response to a current signal from the ECM/PCM inorder to maintain the proper idle speed.
37 model;
IAC VALVE 2P CONNECTOR {C132}
,f rcp'# IYEL/BI.(II2f-1-d)
Y
Wir€ side of female terminals
PCM CONNECTOR A I32PI
tacvIBLK/BLU)
From AIR To INTAKECLEANER MANIFOLD
Wire side of female terminals
The MIL has beon .eport€d on.OIC Pl508 is sto.ed.
Problem veiification:1. Do the PCM Reset Procedure.2. Start the engine, and warm itup to normal operating tem-perature.
Inte.mittent failure, systcm b OKat thi3 time. Check tor poo. con-nections or loose wircs at C132(lAC v.lvel and at the PCM.
ls DTC Pl508 indicated?
Check lor an open in the wir6{lGPl lins}:1. Turn the ignition switch OFF.2. Disconnect the IAC valve 2Pconnector.3. Turn the ignition switch ON {ll).4. Measure voltage between bodyground and the IAC valve 2Pconnector term inal No.2.
Repair open in the wire trctwoontha IAC v!lv6 and the PGM-Flmain relly.
Chock for an opan o. short in thowi.e (lACv linel:1. Turn the ignition switch OFFand reconnect the IAC valve2P connector.2. Disconnect the PCM conneclorA (32P).
3. Turn the ignition switch ON {ll).4, Measure voltage betweenbody ground and PCM con-nector terminal A12.
{To page 1l-153)
www.emanualpro.com

The MIL has boen r.ported on.DIC Pl 508 b 3tored.
Problem veritication:L Do the ECM/PCM Reset Pro-cedure.2. Start the engine, and warm itup to normal operating tem-perature.
Int€rmittent failure, systom is OKal lhis timo. Check lor poor con-nections or looro wirca at C132(lAc vrlvel and .t rho EcM/PcM.
ls DTC P1508 indicated?
Chock tor an open in the wir6llGPl linel:1. Turn the ignition switch OFF.2. Disconnect the IAC valve 2Pconnector,3. Turn the ignition switch ON (ll).4. Measure voltage between bodyground and the IAC valve 2Pcon nector termina I No, 2.
Repair opon in the wira botwoonthe IAC valve and tho PGM-FImain aalay.
Check tor an open or short in thewire (IACV linel:1. Turn the ignition switch OFFand reconnect the IAC valve2P connector.2. Disconnect ECM/PCM con-nector B {25P).3. Turn the ignition switch ON {ll}.4. Measure voltage betweenbody ground and ECM/PCMconnector terminal 823.
Ropair open or short in thg wirebetween tho ECM/FCM lB23l andthe IAC valve.
ls there battery voltage?
Check the IAC valve func,tion:Momentarily connect ECM/PCMconnector terminals 823 and 82with a jumper wire several times.
Does the IAC valve click?
Subslitute . known-good ECM/PCM .nd rechock. lf symptom/indication goes aw.y, replac.th€ original ECM/PCM.
ldle Air Control (lAC) Valve {cont'd}
'98 - 00 models:
IAC VALVE 2P CONNECTOR {C132I
F rcpt*l tYELrBLxlI2/'-- rf)
Y
Wire side ot fem.le terminals
ECM/PCM CONNECTOR B (25PI
Wire side of female torminals
258
9'to1l13t7
1920212223
tAcv(BLK/BLUIv
PG1{BLKI
12 | t3 4 58
910 111317
1920 | 121)22
tAcv(BLK/
BLU)JUMPER WIRE
www.emanualpro.com

Air Conditioning Signal
This signals the EcM/PcM when there is a demand for cooling from the air conditioning system.
'97 modol:
Wire side of lemale terminals
PCM CONNECTOR C (31PI
ACS IBLU/RED)
PCM CONNECTOR A (:TIPI
(cont'd)
1 1-1 55
Chock for a shorl in thc wiro(ACS linol:1. Turn the ignition switch OFF.2. Disconnect the A/C pressure
switch 2Pconneclor.3. Turn the ignition switch ON (ll).,1. [Ieasu re voltage betweenPCM connector terminals C5
and A9.
Check for . .hon in the wire IAGSlinel:1. Turn the ignition switch OFF.2. Disconnect PCM connector C(31P).
3. Check for continuity betweenbody ground and PCM con-nector torminal C5.
Reoaii short in tho wire b€twoenrh6 PCM (Csl and the A/C pres-
3urc 3witch.
- Subcdtrte a known{ood PCMand recheck. lf pr6actibed volt-age is now av{ilable, roplacethe origind PCM,- Soe the eir conditionor in3p€c-lion lsee soction 221.
Check tor an opon in the wite(ACC lino):1. TLrrn the ignition switch OFF.2. Roconnect the A/C pressure
switch 2P connector.3. Turn the ignition switch ON (ll).
4. Momenta rily connect PCMconnector terminals A9 and417 with a iumper wire sev'eraltimes,
Wire side of female terminals
JUMPER WIRE
(To page 11-156)Wire side oI Iemale terminals
www.emanualpro.com