Page 334 of 1395
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
www.emanualpro.com
Page 335 of 1395
TDCP (GRN)
CYPP (YEL}
TDCM (REDI
'98 - 00 models:
'98 model:DISTRIBUTOR 1OPCoNNECTOR (C121)
CYPM IBLKI
Terminal side of male terminals
'99 - 00 modelr:DISTRIBUTOR 8PcoNNECTOR {C121)
TDC M (RED}
Terminal side of male terminals
CKP P
{BLU)
'98 modeliTDC P {GRNI
CKP MIWHT)
TOC P
IGRNI
CYP P(YEL)
(RED)
CYP M(BLKI
M
female terminals(cont'd)
1 1-133
TDC P (GNN}
CYP P IYEL}
CYP M IBLKI
SENSORDTCSENSORERMINAT):'99 mode
ECM/PCMIERMINAIWIRECOLOR
CKPP0335P0336
1 t2)c8BLU
8 (6)c9
TDCP1361Pl362
2 (3)c20GBN
9 (7)c21RED
CYPP]381P]382
3 (4)c29YEL
10 {8)c30BLK
ECM/PCM CONNECTOFS C {31P)
The MIL ha3 been reoorted on.DTC P0335. P0336, P1361,P1362. P1381 andlor P13V arestor€d,
Problem verification:1. Do the ECM/PCM Reset Procedure.2. Start the engine.Intermittant tailure, svstom is OKat this time. Check for poor con-nections or loose wirgs al C121{distributo.l .nd at the ECM/PCM.
ls DTC P0$5, m$6, Pl361, P1362,P1381 and/or Pl382 indicated?
Check for an open in th6 CKP/TDC/CYP sensor:1. Turn the ignition switch OFF.2. Disconnect the distributor 10P(8P)* connector.3, Measure resistance betweenthe terminals of the indicatedsensor {see table).
Rephce the distributor ignitionhouaing l3e9 3oction 4).ls there 350 700 0?
Check for a short in the CKP/TDC/CYP s€nsor:Check for continuity to bodyground on both terminals of theindicated sensor individually (see
table).
Replaco tho distributor ignitionhousing lsee soction tll.
Check for an op€n in th6 wiresICKP/TDC/CYP linesl:1. Reconnect the distributor 10P(8P)* connector.2. Disconnect ECM/PCM connec-tor C (31P).
3. Measure resistance betweenthe terminals of the indicatedsensor on the ECM/PCM connector (see table).
Repair open in the indicated sen-sor wires lsee t.ble).ls there 350 700 O?
(To page 11-134)
':'99 - 00 models
www.emanualpro.com
Page 340 of 1395
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
Page 342 of 1395
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
Page 343 of 1395
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
Page 347 of 1395
(From page 11-144)
Check for a shorl in the wires(CKF lines):Check lor continuity betweenbody ground and ECM/PCM connector terminal C22.
Repair short in tho wire betweenthe ECM/PCM {C221 and rh. CKFls there continuity?
Substitute a known-good ECM/PCM and recheck. lf svmptom/indication goes away. replacethe original ECM/PCM.
ECM/PCM CONNECTOR C (31PI
Wire side of female terminals
CKF P{BLU/RED)
11-145
www.emanualpro.com
Page 354 of 1395
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
Page 356 of 1395
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
