1999 HONDA CIVIC no. 25

PGM-FI System
I
a
a
Ch6ck the PO2SHTC circuit:1. Start engine and keep enginerpm at idle.2. At the engine wire harness,measure voltage betweenPrimary HO2S (Sensor 1) 8Pconnector terminal No. 1 terminal and body ground.
Check for an open in the wire(PG linellMeasurc voltage between PrimaryHO2S (Sensor 1) 8P connector ter-minals No. l and No.2.
ls there morethan 5 V?
Repair opon in the wi.o bEtwoonthe HO2S.nd G101 (located atth.rmonat housingl.
ls there more than 5 V?
Substitule a known-good ECM.nd .echeck. lt 3ymptom/indica-tion 906! rwry, roplace the origi-nal ECM,Check lor a short in the wire
{PO2SHTC line):1. Turn the ignition switch OFF.2. Disconnect ECM connector A(32P)trom the ECM.3. Check for continuity betweenECM connector terminal 46and body ground.
Ropair 3hort in tho wire betwoenthe ECM {46} and the Prim.ryHO2S lson3or 11.
Check for an open in the wire(PO2SHTC linel:Check for continuity betweenECM connector terminal 46 andthe Primary HO2S (Sensor 1)8Pconnector terminal No. 1.
Repair opsn in the wir6 botweenECM {A6} .nd the Primary HO2Slsonror 1).
Substituto a known-9ood ECMand rech6ck. lf symptom/indica-tion goes away, replace the origi-nal ECM.
Heated Oxygen Sensor (HO2S) Heater (Dl6Y5 engine with M/Tl (cont'd)
(From page 11-161)PRIMARY HO2S (SENSOR 1} 8P CONNECTOR {Cl45I
PO2SHTC{BtK/WHT)
PO2SHTCIALK/WHTI
ECM CONNECTOR
female terminals
11-162
\.
!
\
A {32P}
o
6I9l roIt
12t3l5t61't8t9a221 232a
252'2aEito,1| ---

PGM-FI System
Knock Sensor (KSl ('96 - 98 D16Y5 engine with CW and'96 - 98 D16Y8
engine)
Forr-l I,3,.""""
tool indicates Diagnostic Trouble Code (DTC) P0325: A malfunction in the circuit of the Knock sensor
DIAPHRAGM
ECM/PCM CONNECTOR D {16PI
KS 2P CONNECTOR (Cl371
KS(RED/BLUI
KSIRED/BLU)
The MIL has bgen roportsd on.DTC PO:t25 is stored.
Problom veiilication:1. Do the ECM/PCM Reset Proce-oure,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 tor at least 60 sec-onds.
Intermittenl fsilu16, 3y3l6m b OKat thi3 timg lteat drivo mav banoc63saryl.Chock tor poor conneclioni orloose wire3 b€twccn C137 {knocklen3or (KS)l and ECM/PCM.
ls DTC P0325 indicated?
Check for a short in tho wire {KSlinel:1. Turn the ignition switch OFF.2. Disconnect the knock sensor2P connector,3. Discon n ect the ECM/PCMconnector O (16P).
4. Check for continuity betweenECM/PCM connector termi-nals D6 and body ground.
Reo.ir 3hort in the wire betweenECM/PCM {DG) .nd knock 3.n-
Chock for an open in the wire(KS linel:Check for continuity betweenECM/PCM connector torminal D6and knock sensor 2P connectorterminal No. l.
Ropair open in the wire bgtweonECM/PCM lD6l and knock sen-3('t.ls there continuity?
Substitute a known-good knocksensor and recheck.
Rsplace th. o.igin.l knock s€nsor.
Substitute a known-good ECM/PCM end recheck. lf 3ymptom/indication goes rway, replacerhe original ECM/PCM.
Wire side of female terminals
1\
I
tert
,_-
eslnini
,--tl
le oI temrlsal€
121
189't01t12
13l4t5t6
11-170

Knock sensor (Ks) r99 - 00 D16Y5 engine with cw, '99 - 00 D16Y8 engine and
816A2 engine
The scan tool indicates Diagnostic Trouble Code (DTC) P0325: A malfunction in the circuit of the Knock Sensor
{KS}.
OIAPHRAGM
ECM/PCM CONNECTOR C (31P)
KS 2P CONNECTOR (C1371
KS
Wire side of female terminals
t
The MIL has been reported on.
DTC m325 is stored
Problem verification:1. Do the ECM/PCM Reset Pro
cedure,2. Start the engine Hold the
engine at 3,000 rpm with no
load (in Park or neutral) until
the radiator fan comes on,
then let it idle.
3. Hold the engine at 3.000 -
4,000 rpm for at least 60 sec'
onds.
lntermittent failure, system is OK
at thi3 time lt€3t drive maY b€
nocessaryl.Chsck tor poor connections or
loose wiros at C137 {knock sen'
sor {KSll and ECM/PCM.
ls DTC P0325 indicated?
Ch€ck for a short in tho wire (KS
linel:1. Turn the ignition switch OFF.
2, Disconnect the knock sensor
1P connector.3. Check for continuity between
ECM/PCM connector termi_
nals C3 and body ground.
Repri. short in the wiro bqtwecnECM/PCM lc3l and knock 3ensor.ls there continuity?
Check for an open in lhe wire
{KS linc):Check for continuity between
ECM/PCM connector terminal C3
and knock sensor connector ter-
minal No. 1.
Replir open in the wire bdtweon
ECM/PCM {Ctl and knock sensor'
SubstitLrte a known'good knock
sensor and recheck,
Replace tho otiginal knock sensor.
substitute a known-good ECM/PCM and recheck. ll symptom/indication goes awaY, rePl6co
tha o.iginal ECM/PCM.
Wire side of female terminals
ECM/PCM CONNECTOR
11-171

PGM-FI System
tFos3sl
tFffi6l
tPr361 I
fPfi62l
fFr38il
tF13s2-l
Crankshaft Position/Top Dead Genter/Gylinder Position (CKP/TDC/CYP) Sensor
('96 - 98 Models, '!n - 00 D16Y5 engine with M/Tl
The scan tool indicates Diagnostic Trouble Code (DTC) P0335: A malfunction in the Crankshaft position (CKp)
sensor circuit.
The scan tool indicates Diagnostic Trouble Code (DTC) P0336: A range/performance problem in the CrankshaftPosition (CKP) sensor circuit.
The scan tool indicates Diagnostic Trouble Code (DTC) P1361: Intermittent interruotion in the Too Dead Center(TDC) sensor circuit.
The scan tool indicates Diagnostic Trouble Code {DTC) P1362: No signal in the Top Dead Center (TDC} sensorcircuit.
The scan tool indicates Diagnostic Trouble Code (DTC) P1381: Intermittent interruption in the Cvlinder Position{CYP) sensor circuit.
The scan tool indicates Diagnostic Trouble Code {DTC) Pl382: No signal in the Cylinder Position (CYP} sensorcircuit.
Description
The CKP Sensor determines timing for fuel injection and ignition of each cylinder and also detects engine speed. The TDCSensor determines ignition timing at start-up (cranking) and when crank angle is abnormal. The Cyp Sensor detects theposition of No. 1 cylinder for sequential fuel injection to each cylinder. The CKP/TDC/CYP Sensor is built into the distribu-ror.
NOTE: lf DTC P1359 is stored atthesametime as DTC P0335. P0336, P1361, Pl362, P1381 and/or P1382, troubteshoor DTCP1359 first, then recheck for those DTCS. Ot6y5 6ngine: Dt6y7, ot6y8 enqin6s:
SENSORBOTOR
TDCSENSORCKPSENSORSENSORROTORSENSORROTORSENSORROTORROTORROTOR
DISTRIBUTOR 1OPcoNNECTOR tC120tTDC P
- The MIL hrs been reported on.- DTC P0335, P0336, P1361,P1362, P1381 and/or Pl382 6restored,
Problem verification:1. Do the ECM/PCM Reset Proce-dure.2. Stan the engine.
Intermittent hilu.e, system b OKat this time. Check tor poor con-n€ctions or 10036 wiros at C120{distributor} and ECM/PCM.
ls DTC P0335, P0336, P1361, P1362,P1381 and/or P'l382 indicated?
Check for an open in the CKP/TDC/CYP sensor:1. Turn the ignition switch OFF.2. Disconnect the distributor 10P
3. Measure resistance betweenthe terminals of the indicatedsensor (*see table).
Replace the distributor ignitionhousing (soe section 23).ls there 350 - 700 0?
CYP M {BLK}
SENSORDTCSENSORIERMINATECMfCMTERMINATCOLOR
CKPP033s
m336
2c2BLU
6c12
TDCP1361
P1362
3GRN
7cl3RED
CYPP!381
P't382
c4YEL
8c148LK11-172

PGM-FI System
l-Fos3sl
tFos36l
tF1361 l
Fr362-1
tF13sil
Crankshaft Position/Top Dead Center/Cylinder Position (CKP/TDC/CYPI Sensor
f99 - 00 Models except D16Y5 engine with M/T)
The scan tool indicates Diagnostic Trouble Code (DTC) P0335: A malfunction in the Crankshaft Position (CKP)
sensor circuit.
The scan tool indicates Diagnostic Trouble Code (DTC) P0336: A range/performance problem in the Crankshaft
Position (CKP) sensor circuit.
The scan tool indicates Diagnostic Trouble Code (DTC) P1361: Intermittent interruption in the Top Dead Center
{TDC) sensor circuit.
The scan tool indicates Diagnostic Trouble Code {DTC) P1362: No signal in the Top Dead Center (TDC) sensor
circuit.
The scan tool indicates Diagnostic Trouble Code (DTC) P1381: Intermittent interruption in the Cylinder Position(CYP) sensor circuit.
lTiaSt The scan tool indicates Diagnostic Trouble Code (DTC) P1382; No signal in the Cylinder Position (CYP) sensor: circuil.
DoscriDtion
The CKP Sensor determines timing for fuel injection and ignition of each cylinder and also detects engine speed. The TDC
Sensor determines ignition timing at start-up (cranking) and when crank angle is abnormal. The CYP Sensor detects the
position of No. 1 cylinder for sequential fuel injection to each cylinder. The CKP/TDC/CYP Sensor is built into the distribu-
tor.
NOTE; lf DTC P1359 is stored at the same time as DTC P0335, P0336, P1361. P1362, P1381 and/or P1382, troubleshoot DTC
P1359 first, then recheck for those DTCS. D16Y5 engino:
SENSORROTOR
TDGSENSORCKPSENSOBTDCSENSOBCKPSENSOBCYPs€NsonBOTORROTORBOTONROTOR ROTOR
D16Y7, D16Y8 ongine:
(To page 11-175)
1-174
- The MIL has been reportod on.- DTC P0335, P0336. P1361,P1362, P1381 rnd/or P1382.restored.
Problem verific{tion:1. Do the ECM/PCM Reset Proce-dure.2. Start the engine.
Intormittcnt failure, systom b OKat thb time. Check to. poor con-nections or loose wires at C120(dktributorl and ECM/PCM.
ls DTC P0335, P0336, P1361, P1362,P1381 and/or Pl382 indicated?
Check tor an open in the CKP/TDC/CYP 3enior:1. Turn the ignition switch OFF.2. Disconnect the distributor 10Pconnector,3. Measure resistance betweenthe terminals of the indicatedsensor (*see table).
Replrce the distributor ignitionhou3ing (!ee section 231.ls there 350 700 0?
SENSORDTCSENSORTEBMINAIECM/PCMTERI\,4INAICOLOR
CKPP0335
P0336
2c88LU
6c9
TDCP1361
P1362
3c20GRN
7c21BED
CYPP1381
P1342
c29YEL
Ic30BLK

Electrical Load Detector (ELDI {'96 - 98 Models,'tn - 00 D16Y5 engine with M/T}
The scan tool indicates Diagnostic Trouble code (DTC) P1297: A low voltage problem in the Electrical Load
Detector (ELD) circuit.
ELD 3P CONNECTOR (c35'rl
l-- ,ll l2l3l--f ..
ao (GRN/REDI
Y
ECM/PCM CONNECTOR O I16PI
Wire side of female terminals
Problem verification:'!. Do the ECM/PCM Reset Pro-
cedure.2. Sta rt the engine
3. Turn on headlightslntermittent tailure, sYstem is OK
at this time. Check for Poor con-
nection3 or loose wires at C131
tlocated under righl side of da3h).
C354 (ELDIand ECM/PCM.
ls DTC P1297 indicated?
Ch.ck lor short in the ELD:
Measure voltage between body
ground and the ELD 3P connector
terminal No.3.
ls there approx.4 5 V?
Check for a short in tho wile (EL
linel:1. Turn the ignition switch OFF'
2. Disconnect the ECM/PCM con
nector D (16P)
3. Check for continuity between
body ground and ECM/PCM
connector terminal D16
R6pair short in the wire between
ECM/PCM (D161and ELD.
Substitute a known-good ECM/
PCM and recheck lf symplom/
indication goes awaY, rePlace
the original ECM/PCM
ra
11-179

PGM-Fl System
Elestrical Load Detector |ELD) t'glf - 00 Models except D16y5 engine with M/Tl
The scan tool indicates Diagnostic Trouble Code (DTC) P'1297; A low voltage probtem in the Electrical LoadDetector (ELD) circuit.
ELD 3P CONNECTOR tC354)
EL{GRN/REOI
ECM/PCM CONNECTOB A I32PI
Wire side of lemale terminals
Problem verilication:1. Do the ECM/PCM Reset Pro-cedure.2. Sta rt the engine.3. Turn on headlights.
Inlermittont failur6. systom i3 OKat this time, Chock tor ooor con-nestions or loose wires at C131(locrted undor ight side ot d.shl,C354 (ELDI and ECM/PCM.
Check for short in th6 ELD:Measure voltage between bodyground and the ELD 3P connectorterminal No.3.
ls there approx. 4.5 V?
Check to. a short in the wne (ELlinel:'L Turn the ignition switch OFF.2. Disconnect the ECM/PCM con-nector A (32P).
3. Check tor continuity betlveenbody ground and ECM/PCMconnector terminal A30.
Repair short in the wile betweenECM/PCM lA30) and ELD.ls there continuity?
Sub3titute a known-good ECM/PCM and rech€ck. It symptom/indication goes away. replacethe o.iginal ECM/PCM.
1 1-180

Elestrical Load Detector (ELD) f96 - 98 Models''99 - 00 D16Y5 engine with M/T)
ThescantoolindicatesDiagnosticTroubleCode(DTC)P1298:AhighvoltageproblemintheElectricalLoad
Detector (ELD) circuit
ELD 3P CONNECTOR {G's'I
Wire side ol female terminals
EL IGFN/REDI
Problom vcrificttion:
1. Do the EcM/PClVl Reset Pro-
cedure,2. Start the engine.
3. Turn on headlights.lntarmitt..rt l.ilur., ryttcm b OK
.t thia tim. Ch.ck lor Poo' con-
nections or looaa wir.3 at C131
lbcd.d und.r right ide ol dalhl'
Gl5a {EU)} .nd ECM/PCIYI
ls DTC P1298 indicated)
Ch.ck lor tn oPan in tho wir'
(lGl linol:1. Turn the ignition and head'
liohts OFF2. D]""onn""t the ELD 3P con_
nector-3. Turn the ignition switch ON {ll)'
4. Measure voltage between body
ground and the ELD 3P connec
tor terminal No. '1.
R.oair ogan in tha wira Mw"n
ru". rs ltTEnrlton SP SelSOn
t?.5 A, fu!. in th. undcr-dr3h
tu3e/r.l!Y box .nd ELD.
Chcck lor tn oP.h in thc wire
{GND lincl:1. Turn the ignition switch and
headlights OFF.
2. Disconnect the ELD 3P con_
nector'3. Check for continuity between
body ground and the ELD 3P
connecto. terminal No 2
Raprir opcn in the wira bstwt€n
ELD conncctor lnd G/O2.
Ch.ck lor !n oplo in tha wirc IEL
lin.l:Check for continuity between the
ELD 3P connector terminal No 3
and ECM/PCM connector termi
nal D'16.
Rapaii opcn in the wira b€tw"n
ECM/FCM (I)161 .nd th. ELD'
Ch.d( fo. r m.llunction in thc ELD:
1. Reconnect the ELD 3P con'
2. Start th€ engine and allow it
to idle.3. Wh ile measuring voltage
beNveen ECM/PCM connector
terminals D16 and A9, turn
the headlights on {low).
Does the voltage droP?
Sub3titut. . known_good ECM/
PCM .nd rcch.ct. lt sYmptom/
indication goas away/ iapllc'
thc origin.l ECM/PCM
wire side of lemale termrnals
Wire side of Iemale terminals
t'a
)
1 1-181