1998 HONDA INTEGRA turn signal

PGM-FI System
Crankshaft Speed Fluctuation {CKF) Sensor
lT13a6l Tje scan tool indicates Diagnostic Trouble Code (DTC) P'1336: lntermittent interruption in the Crankshaft Speed: Fluctuation {CKF) sensor orcurt.
The scan tool indicates Diagnostic Trouble Code (DTC) P1337: No signal in the Craqkshatt Speed Fluctuation (CKF)
sensor circuit.
DescriDtion
The diagnostic system has a pulser rotor on the crankshaft and a pulse pick-up sensor on the engine block. The ECM mon-
itors the crankshaft speed tluctuation based on the CKF sensor signal, and judges that an engine misfire occurred it the
lluctuation goes beyond a predetermined limit.
CKF SENSOR CONNECTOR IC 110)
T:lr+T
IJI',Icrr e -f-fcxr na
{BLU/RED} (D lwHr/REDI
Terminal side of male termanals
- The MIL has beon.ooorted on.- DTC P1336 and/or P1337 arostoaed.
Problem vo.itication:1. Do the ECM Reset Proced!re.2. Start the engine.
lntermittent feilure, swtem is OKat ihis timo. Chcck for ooor oon-noctions or loose wir* ei C110(CKF sonsor) and ECM.
Check for an open in tho CKF sen-sor:1. Turn the ignition switch OFF.2, Disconnect the CKF sensor con-
3. Measu re the resistancebetween the CKF sensor 2Pconnector terminals No. 1 andNo.2.
ls there 1.6 - 3.2 kO?
Check lor . short in tho CKF sen-30t:Check for continuity betweenbody ground and the CKF sensor2P connector terminals No. 1 andNo.2 individually.
ls there continuity?
(To page 11-91)
1 1-90
T:]lf -rl11 2|
TTcKF P /6 6 CKF M
relul Y\Z twxvneotneot ,-- | L

JP1681 | The scan tool indicates Diagnostic Trouble Code (DTC) P1681: A low voltage problem in the A/T Fl signal A
circuit.
P1682 | The scan tool indicates Diagnostic Trouble Code {DTC) Pl682: A high voltage problem in the A//T Fl signal A
circuit.
]TtOgOl fh" scan tool indicates Diagnostic Trouble Code (DTC) P1686: A low voltage problem in the A"/T Fl signal B
ctrcutt.
lFt Ogt-l fh" scan tool indicates Diagnostic Trouble Code (DTC) P1687: A high voltage problem in the A"/T Fl signal B
crrcurt.
ECM CONNECTOR C {31PI
IGRN/BLU)
Wire side of female terminals
TCM CONNECTOR {22P) {C419}Wire side of female terminals
2!a5't0
tl1213 tatat6It1a19 ,/
AFSB I I AFSA
{GRYI T- _IIGRN
@)o
2311to21 ;'15 15 17 13 13
E./ zl za
G-\
AFSIGR
\-
a
AFlGl
I
sBl
L]
r@!I AFSA
| {GRN/lRt ltl
iFSGRIA[/BLUt
12 3 a 5 6 7 89
tz /'tt //t't /ts zo
to ,/
DTC P1681, P1682, P1686 end/or P'1687 are stored.
Problem verificetion:1. Do the ECM Reset Procedure.2. orive the car for several milesso that the transmissionupshifts and downshifts severarlrmes.
Intormittent lailure. system is OKat thi3 tim€. Check tor ooo. con-nections or loo3o wir6s al C419{TCM} .nd ECM.
ls DTC P1681, P1682, Pl686and/or P1687 indicated?
Check tor a short in th6 wires{AFSA, AFSB linel:1. Turn the ignition switch OFF.2, Disconnect the 22P connectorfrom the TCM.3. Disconnect the ECM conn6c-tor C (31P).
4. Check for continuity betweenbody ground and ECM con-nector terminal C28 (C27)*.
Rcoair 3hort in tho wiros betweenECM lC28 or C27*l rnd TCM.ls there continuity?
Check fo. an open in the wiresIAFSA, AFSB lines):Check for continuity between ECMconnector terminal C28 (C27)* andTCM 22P connector terminal No. 7(No.6i*.
Repai. opsn in the wiros bdtweenECM lC28 or C27'l and TCM.
Subsiiiutg a known-good ECMend r6ch€ck. lf 3ymptom/indica-tion goes away, repl.c6 the origi-nal ECM.
":DTC P1686 or Pl687 (NT Fl sisnal 8l
1 1-95

ldle Control System
Problem verification:'1. Do the ECM Feset Procedure.2. Sta rt the engine.
ldle Air Control (lAG) Valve
The scan tool indicates Diagnostic Trouble Code (DTC) P1508: A problem in the ldle Air Control (lAC) valve
crrcurt.
The IAC Valve changes the amount of air bypassing the throttle body in response to a current signal from the Eclvl in
order to maintain the proper idle speed.FTom AIB To INTAKECLEANER MANIFOLD
IAC VALVE CONNECTOR IC116}
YES
WIRE SIDE OF FEMALE TERMINALS
ECM CONNECTOR A {32PI
Check for an open or short in thewire IIACV line):1. Turn the agnition switch OFFand reconnect the IAC valve
2. Disconnect the ECM connector A (32P).
3. Turn the ignition swatch ON (ll).
4. M easu re voltage betweenbody ground and ECM connector terminal A12.
IACV {8LK/BLU}
tacv{BLK/BI-UI
The MIL has been reoorted on.OTC Pl508 is stored.
lntermittent failure, svstem is OKat this time. Check for ooor con-nections or loose wires at C116{lAC valvel and ECM.
ls DTC P1508 indicated?
Check tor an open in lhe wirellGPl line):1. Turn the ignition switch OFF.2. Disconnect the IAC valve con
3. Turn the ignition switch ON (ll).
4. Measure voltage betlveen bodyground and the IACV connectorterminalNo.2.
Repair open in the wire betweenIAC valve and PGM-FI main relav-ls there battery voltage?
Repair open or shon in the wi.ebetween ECM {A12l and lAc valve.ls there battery voltage?
Check the IAC velve function:Momentarily connect ECM con-nector terminals A12 and A10with a jumper wire several times.
Does the IAC valve click?
Substitute a known-good ECMand rocheck. lf symptom/indica-tion goes away. replace the origi-nal ECM.
','*',,'Llu.9', I l112 15 16 17 1a1o20/
l--12u1 z"-if1za-2"' . '1 .
910
t-r '21
Wire side of female terminals
JUMPER WIRE
1-100

This signals the ECM when the Alternator (ALT) is charging.
Alternator (ALT) FR Signal
Check lor a short in th€ wire {ALTF line):1. Oisconnect the ALT GRN 4P(3P)* connector from the ALT.2. Turn the ignition switch ON {ll).3. Measure voltage between ECMconnector terminals C17 and A9.
ECM CONNECTORSA t32Pt
LG1
c 13lPl
ALT F(WHT/FEDI
Wire side of female terminals
ALT GRN 4P CONN€CTOR {C119}
JUMPER WIRE
Wire side of female terminals
ALT GRN 3P CONNECTOB {C119)*
JUMP€RWIRE
Wire side ot female terminals
12 15 t6 rr t8 19I
?
oALT F(WHT/REOI
23aI10
t112t3t5l6r819 ,/21
./,/,/2a29
[,ALT FIWHT/RED)
12339
11 12l517 tla19 ,/21
Inspection of ALT FR Signal.
Check for a shon in the wire {ALTF line):1. Turn the ignition switch OFF.2. Disconnecl the negative baatery cable from the battery.3. Disconnect the ECM connectorc (31P).
4. Check for continuity betweenbody ground and ECM con-nector terminal C17.
ls there approx.5 V?
Check the operation ofthe ALT:1. Turn the;Onition switch OFF-2. Reconnect the ALT GRN 4P(3P)* connector to the ALT.3. Start the engine. Hold theengine at 3,000 rpm wkh noload {in Park or neutral) untilthe radiator fan comes on,then let it idle.4. Measure voltage bet/veen ECMcon nector termina ls C17 and A9.
Ropair short in the wir6 betweenth6 ECM (C17) and the ALT.
Substitute a known-good ECMand recheck. It prescribed voltagGis now available, replace th€ origi-nal ECM.
Does the voltage decrease whenheadlights and rear defogger areturned on?ALT FR signal is OK.
Check tor an open in the wire {ALTF line):1. Turn the ignition switch OFF-2. Disconnect the negative bat-tery cable from the battery.3. Disconnect the ECM connector C (31P).
4. Disconnect the ALT GRN 4P(3Pi* connector from the ALT.5. Connect the ALT GRN 4P (3p)*
connector terminal No. 4 (No.'l)* to body ground with a
6. Check for continuity betweenbody ground and ECM connector terminal C17.
Ropair open wire bstw€an theECM {C17} and rhe ALT.ls there continuity?
ri Canada
11-101

ldle
Air
Gontrol System
Gonditioning Signal
\
This signals the ECM when there is a demand for cooling from the air conditioning system'
ECM CONNECTORS
a l32Pl
LGl(BRN/BLKI
c t31Pt
ACSIBLU/REDI
wire side of femal€ torminals
;
L
LGI
JUMPERWIRE
ACS IBLU/REDI
Check lor.3hort in thG wira(ACS lino):1. Turn the ignition switch OFF.2. Disconnect the A/C pressure
switch connector and A/Cdiode connector,3. Turn the ignition switch ON (ll).
4. Measu re voltage betwo€nECM connector terminals C5and A9.
Ch.ck to.. rhorl in th. wir. IACSlincl:1. Turn the ignition switch OFF.2. Disconnect the ECM connec-tor C (31P).
3. Ch6ck {or continuity betwe€n
body ground tnd ECM con-nector terminal C5.
lsthere approx.5 V?
Rapair rhort In tho wira batwaon
th. EcM {c5l and thc A/c pre.-
sur. rwitch ot A/C diod.,
- Subtlilut I known{ood Ecttllnd raahack. lf prtactibad voft-
rgo ir now avaihbla, tcplacalh. originll ECM.- Saa tha air condhiond in.plction 1... r.ction 221.
Check lor an opan in th€ wi.a(ACC lin.l:'1. Turn the ignition switch OFF.2. Reconnect th6 A,/C pressure
switch connector and A/Cdiode connector.3. Turn the ignilion switch ON (ll).
4. Momentarily connect ECMconnector terminals A'17 andAg wkh a iumper wire severaltimes,
(To page 11"103)
IBRN/BLKI
Ial,/l l8 I r0 I rl
12't516 11alrslzo ,/ l4l a3 | 2.
aa2621zel dt
IBLK/REDI
11-102
\

(From page t 1'102)
Ch6ck {or an op6n in the wireIACC linel:Mo m enta rily connect the A/Cclutch relay 4P connector termi-nal No. 4 to body ground with a,umper wire several times.
ls there a clicking noise fromthe A,/C compressor clutch?
ls there a clicking noise fromthe 4,./C compressor clutch?See air conditione. insoection{s€e section 22).
Repai. op6n in the wire betwe€ntho ECM lA17l and the A/C clutch
Check tor the oparation of theA/C:1. Start the eogine.2. Turn the blower switch ON.3. Turn the !y'C switch ON.
Check lor sn open in th6 wireIACS line):Measure voltage between ECMconnector terminals C5 and A9,
Air conditioning signal i3 OK.Repafu open in the wire betweenthe ECM {C5} and th€ A/C D.es-sure switch or A/C diode.
ls voltage less than 1.0 V?
- Substitute e known-good ECM.nd .echeck. lf 3ymptom/indi-cation goes away, rcplaco th€original ECM.- 56€ the air conditionor inspcc-tion {3eo soction 221.
UNDER HOOD FUSE/RELAYBOX 9P CONNECTOR tC216)
JUMPERWIREACC {SLK/RED)Wire side of temale- terminals
A {32P)
LGl(BRN/BLKI
ECM CONNECTORS
Wire side of female terminals
c (31P)
ACS{BLU/RED}
I
'1.1-103

ldle Control System
Check lor a 3hon in the wiro IATPPN linel:1. Turn the ignition switch OFF.2. Disconnect the 10P connectorfrom the gauge assembly.3. Disconnect the 26P connectorfrom the TCM.4. Turn the ignition switch ON (ll).
5. Mea su re voltage betweenECM connector terminals C29and A9.
Automatic Transaxle {A/T) Gear Position Signal
1 1-106r.
This signals the ECM when the transmission is in Park or neutral.
(To page 11-107)
Check the oparation ot the A/Tg6ar posilion switch:1. Turn the ignition switch ON (ll).
2. observe the A/T shitt position
indicator and select each Posi'tion separately.
560 the A/T go.r position indice-tor inroection lseo section 141.
Check tor r 3hort in tho wiro (ATP
PN lino):1. Iurn the ignition switch OFF.2. Disconnect the ECM connec-tor C (31P).
3. Check for continuity betweenbody ground and ECM con'nector terminal C29.
ls there approx.5 V?
Rcpair short in the wir6 batwoentho ECM lc29l and the gauge
6er$lv.
Substitute a known-90od ECMand rccheck. lf prescribed volt-ago is now avail.ble, rcplacc thooriginal ECM.
,PN
GRN/
LGIIBRN/BLKI
ATP PN
ILT GRN/BLKI
Wire side of temale terminals
12355It0
11 1213t319
2A29/,a
I ArP
d llr (
Il/BLKI

{From page 11-'106)
Check tor an op€n in the wiro {ATpPN lin€):Turn the ignition switch OFF.Fgconnect the 10P connectorto the gauge assembly.Reconnect the 26P connectorto the TCM.stan the engine.M€asure voltage between ECMconnector termanals C29 andAg with the transmission inE position.
- Ropair open in th6 wiro bo-twoen tho ECM {C291 and thogru96 a3sgmbly.- Repair open in GRN wir. bo-twaan thc gauga !srembly.nd tho A/T g.ar po3itiongwitch.
ls there less than 1.0 V?
Chod( for an opon in tho wir6 (ATPPN linel:Measure voltage between ECMconnector terminals C29 and A9with the transmission in E] posi,tron.
R.psir op.n in GRN/WHT wirob€twcan th. gaugc rsr.mbly andthc A/T ge.r po.ition 3whch.
ls there less than 1.0 V?
A/T g6er position signal i3 OK.
a l32P)LGl{BRN/BLKI
Wire side of female terminals
ATP PN{I-T GRN/BLKI
11-107