engine connectors HONDA INTEGRA 1994 4.G User Guide

PGM-FI System
Engine Control Module (ECM)
lB18B1 ongino onlyl
The Malfunction Indicator Lamp(MlL) n6v6. com6s on lovon follwo socondal aftor ignition istumed on.
lurn the ignition switch ON.
Inspect No. 15 {BACK-UP LIGHT}l1O A) luse in the underdashtuse/relay box.ls the low oil pressure light on?
- R€placo No. 'l5
IBACK-UP LIGHT)llo Al fuso.- Ropair short inYEL wiro botwoonNo. 15 (BACK-UP
LIGHT) {10 A) fusoano gauge 6$om-blv.
Turn lhe ignition switch OFF.
ls the fuse OK?
Connecl the test harness betweenthe ECM and connectors (seepag€ 11-37).Repair opon in YEL wiio botw6onNo.'15 IBACK-UP LIGHTI 110 A)luso and gaug6 assombly.
Turn the ignition switch ON.
- RsDlaco tho MIL bulb.- Ropair opon in GRN/ORN wi.ebetwoen ECM {A13} andgaug€ a$6mbly.
ls the MIL on?
Measure voltage between body
Oround and the tollowing termi-nafs individuallv: 423, 424.
Ropah op6n in BLK wirolsl bo-tw6en ECM and GlOl llocatod atthormostat housing) that hadmoro than 1.0 V.
ls there less than 1.O V?
Substituto a known-good ECMand rochgck, lf symptom/indica-tion go€s away, roplaco tho origi-nal ECM.
NOTE: lf this svmptom is intermittent. check for a loose fuse No. 15 (BACK
UP LIGHT, 1OA) in the under-dash Juse/relay box, a poor connection at ECM
terminal A13, or an intermittent open in the GRN/ORN wire between the ECM(A13) and the gauge assembly.
I A13
I| | o oooo oooooooo I oooo oooo I ooooool ooooooooooo I
G 10'l
11-42

Th. ll.lfunction Indicltor Lamp
lMlll at!y3 on o. cornaa on alt6ltwo aacond!.
Connect the SCS short connectorto th6 sorvice check connector(see page 11-34).
Turn the ignition switch ON.
Go to iolfdiagnostic Proceduros(se€ pago 11-34).Does the MIL indicate anv Oi-agnostic Trouble Code (DTC)?
Romove th€ SCS shon connectorlrom the service ch€ck connector.
Turn the ignition switch OFF.
Try to start the engine.
Connect the test harness betweenthe ECM and connectors (see
page 11-37).
Turn the ignition switch ON.
Measure voltage botween D4 (+ )terminal and D22 { - ) terminal.
connect the SCS shonconnector to servlcecheck connector.ls there approx. 5 V?
Ropair shon to body g.ound inBRN/WHT wire betwoon th6 ECMlD4) end sorvlco chock connocto?.Measure voltage be_tween D4 {+} terminaland body ground.
- R6pair open in BRN/WHT witobotwoon EcM lD4) and s6rv-ice chock connactor.- Repoir opon in BLK wiro bo-twoon 36rvi@ chock connectoaand G4Ol.
ls there approx. 5 V?
InsDoct ECU {ECM) 115 A) tuse inth6 undeFhood luse/relav box.
- Rsolaco ECU {ECM} (15 Allus€.- R6pair shon in YEL/WHT wilobotw6on ECU lEcMl 115 A)fuso and PGM-FI main rolay.
Remove the scs shortConnector from theservice check con-nector.
ls the luss OK?
NOTE:
a When there is no code stored, the MIL willstay on if the service check con-
nector is shorted.
a tf this svmotom is intermittent, check for:
- A loose ECM fuse (15A) in the under-hood tuse/relay box
- A loose No. 24 fuse (ACG) (ALT) ( 1 5A: B1 8B 1 engine, 2OA: B18C 1 en-
gine) in the under-dash fuse/relay box- An intermittent short in the BRN/WHT wire between the ECM (D4) and
the service check connector- An intermittent oDen in the BLK wire between the service check con-
nector and G4O1- An intermittent shon in the GRN/ORN wire between the ECM (A 13) and
the gauge assembly.- An intermittent short in the YELMHT wire between the ECM (D19) and
the MAP sensor- An intermittent short in the YEL/BLU wire between the ECM (D20) and
the TP sensor
o ooooo ooo ooo o loooooooo liii:$A$.Ps,l o oo ooo ooooo
o oooo ooo o o ooo I oooooooooooooooooo
D4 (+)
l"oo,o'.
D22 t-l
uu,l
'NOTE: After repair, disconnect the SCS ShortConnsctor, test drive the car, and recheckthe MIL
lor a code.
(cont'd)
(To page 1 'l -44)lTo page 1 1-44)
11-43

ldle Control System
Alternator (ALTI FR Signal
This signals the ECM when the Alternator (ALT) as charging.
D9 l+)
Inspection ot ALT FR Sign.l.
Connect the tost harness betweenthe ECM and connectors. Discon-nect "D" connector from themain wire harnoss only, not theECM lsee page 11-37).
Turn the ignition switch ON.
Measure voltage between D9 (+ )terminal and A26 {-}terminal.
Sub{inno s known-good ECMand redrack. It pro.ctibod volt gola now availablg, ropllco tha orlg-inal ECM.
ls there approx. 5 V?
Turn the ignition switch OFF.
Reconnect "D" connector to themain wire harness,
Start tho engino. Hold the engine
!L3,099 rpm with no load (A/T in
LN] or El position, M/T in neutral)until the radiator tan comes on,rhen let it idle.
Measuro voltage between Dg (fl
terminal and 426 (- I terminal.
Does the voltage decreasewhen headlights and .eardelogger are turned on?Turn ths ignition switch OFF.
ALT FR rignal is OK.
o oo oo o ooooo
ooooooooooo
Voh.go?
ooooooooooo
ooooooooooo
1 1-86
(To page 1 1-87)
=-

Rapl!c!ment
@ oo not smoko during tho work. Keep open
fllma3 lway from your wolk aloa.
1. Retieve tuel pressure {see page 1 1-10O).
2. Disconnect the connectors trom the fuel iniectors.
3. Disconnect the vacuum hose and fuel return hosa
from the fuel pressure regulatol.
NOTE: Place a r8g or shop towel over the hoses be-
for6 disconnecting them.
4. Loosen the retainer nuts on the Juel rail and harness
holder.
Disconnect the tuel 18il.
Remove the fuel injectors from the intake manifold.
5.
6.
cusHloNRINGReplace.
FUEL
7.
t'.
9.
10.
13.
14.
16.
11.
Slide new cushion rings onto the luel iniectors.
Coat new O-rings with clean engine oil and put them
on the fuel injectors.
Insen the injectors into the tuel rail tirst.
Coat new seal rings with clean engine oil and press
them into the intake manifold.
Install the Juel iniectors and fuel rail assembly in the
intake manilold.
CAUTION: To plovont damage to th€ O-dngs, instsll
tho fuol inioctors in tho fuol r8il first, thon install th€m
in the intaks mEnitold.
12. Align the center line on the connector with the mark
on the fuel rail.
FUEI. RAIL
MABKI'{GS
Install and tighten the retainer nuts
Conn€ct the vacuum hose and tuel retuln hose to
the fuel pressure regulator.
lnstall the connecto.s on the fuel injectors.
Turn the ignition switch ON, but do not operate the
starte.. After the tuel pump runs for approximately
two seconds, the tuel pressure in the fuelline rises.
ReDeat this two or three times, then check whether
there is any fuel leakage
11-105

(From page 1 1-124)
Raise engine speed to above6,000 rpm.
Disconnect the 2P connector tromthe IAB control solenoid valve.
Turn the ignition switch OFF.
Check for continuity to ground onthe PNK/BLU wire.
Ropair short to g.ound
at PNK/BLU wiro bo-two6n ECM {A17) andtho 2P connector.
ls there continuity to ground?
Substituto a known-good ECMand racheck. It symptom goos
swsy, roplace tho original ECM.
{From pago 1 1-124}
Repsir op6n in YEL/BLKwiro botwoon tho 2Pconnector and FGM-FImain relaY.
ls there battery voltage?
Turn the ignition swirch OFF.
Connect lhe test harness betweenthe ECM and connectors lseepage 11-37).
Turn the ignition switch ON andconnect a lumper wke betweenECM (A17) terminal and ECM
{A26) terminal.
Ropaiiopon inP K/BLUwiao botwoen ECM
lAl7l and tho 2P con-nectot.
Ooes the solenoid valve clickwhen the jumper is con-nected?
Sub3titute a known-good ECMand rechock. lf symptom/indica-tion goos away, r6place tho origi-nal ECM.
Check lor vacuum at #'l3 vacu-um hose.
IAB control syst6m is OK.
11-125

Conneci the Test Hs.ngs6 "A"
and "O" connectors to thg TCM.
Start the engine and warm it upto normal ope.ating t€mpsratuG(the rsdiator fan comes on).
Measurgthe voltage between the05 and A25 or A26 terminals.
Rlplir opsn or rhort in BED/WHTwira botwaan tra D5 torr nC lndtha ECT lanaor.
ls the voltago less th6n lV?
Ch.ct tor loora TCM co.rmcror..It nocgallry, sublthuta a known-good TCM .nd rechrck.
14-69

4. Check that the hole in the adiuste. in perfectly
aligned with the hole in the shift cable. There are two
holes in the end of the shitt cable, They are posi-
tioned 9Oo apart to allow cable adiustment in 1/4
lurn Incremenls.
ADJUSTER
CableI oo snonCableToo LongExactAlignment
5. It not perfectly aligned, loosen the locknut on the
shift cable and adjust as required.
6. Tighten the locknut to 7 N.m (O.7 kgf.m, 5lbf.ft).
7. Install the lock pin on the adiuster. lf you feel the
lock pin binding as you reinstall it, the cable is still
out of adjustment and must be readjusted.
8. Move the selector to each gear and verify that the
automatic transaxle gear position indicator tollows
the automatic transaxle gear position switch.
9. Start the engine and check the shift lever in all gea.s.
lf any gea. does not work properly, refer to
troubleshooting on page 14-86 thru 89.
1O. lnsert the ignition key into the key cylinder on the
shift indicator panel, ve.ify that the shift lock lever
is released,
CAUTION:
a All SRS electrical widng harn€sses are covar€d with
yollow insulation.
a Before disconnecting any part of ths SRS wire har-
ness, connect the shon connectors (see page 23-701.
a R€place the entire affected SRS halnass asssmbly it
it has an op€n circuit or damaged wiring.
@ tu"t" sure lifts a.e placed properly ls66
ssction 1).
Start the engine. Stritt to @ position to see if the
reverse gear engages. lf so, refer to troubleshoot-
ing on page 14-86 thru 89.
Wilh the engine off, remove the center console {see
section 20).
Shilt to N position. then remove the lock pin from
the cable adjuster.
'1.
/
''fidlfr
I
t+@
\/ \
CABLE-.'.-_--l../ADJUSTER
]H
@
@
@
Adjustment
14-171

Troubleshooting
Reference Ghart
. Any abnormality must be correctsd before continuing the test.. Because of the precise measurgments needed, use a multimeter when testing.
Before performing any troubleshooting procedures check:. Fus€s .r No. 35120 A), *1 No. 33 (20 A), ), No. 13(7.5A). Grounds No. G401, G201, G'151, G101. Cleanliness and tightness of all connectors*1: In the under-hood fuse/relay box*2: In the under-dash fuse/relay box
SYMPTOMREMEDY
Radiator fan does not run 8t all.Perform the procedures in the flowchan (see page 22-8).
Condenser fan does not run at all.Perform the procedures in the flowchart (see page 22-10).
Both fans (radiator and condenser) do not
run for engine cooling, but they both run
with the Ay'C on.
Perform the procedures in the flowchan (see page 22-12).
Eoth fans do not run at all.Perform the procedures in the flowchart (see page 22-13).
Compressor clutch does not engage.Perform the procedures in the flowchart (see page 22-14).
Ay'C system does not come on
{compressor and both fans}.Perform the procedures in the flowchart (see page 22-16).
22-7

Troubleshooting
Tips and Precautions
Before Troubloshooting
a Check applicable fuses in the appropriate fuse/relay
DOX.
a Check the battery for damage, state of charge, and
clean and tight connections.a Check the alternator belt tension.
CAUTION:
a Do not quick-charg€ a battery unless the batteryground cabla has be€n disconnoctsd. oth€rwisoyou will damage the alternator diodss.a Do not att6mpt to crank the engine with the bat-tery ground cable loosely connectsd or you will se-vorsly damag€ tho widng.
a The original radio has a codod thatt plotection ci.-cuit. Be sul€ to got tho customor's code numbet
before- disconnecting th€ battery.- lomoving tho No. 32 (7.5 Al tuso f.om the
under-hood tuse/lelay box.- removing tho radio.
Aflor s€lvic€. reconn€ct powet to tho radio and
turn it on. Whon the word "CODE" is displayed,
€nt€l the customer'E s-digit codo to .astore ladio
operation.
Handling Connectors
a Make sure the connectors are clean and have no loose
wire terminals.
a Make sure multiple cavity connectots are packed withgrease (except watertight connectors).a All connectors have push-down release type locks.
LOCKII{G TAA
LOCKING TAB
a Some connectors have a clio on their side used to at-
tach them to a mount bracket on the body or on
another component. This clip has a pull type lock.
a Some mounted connectors cannot be disconnected
unless you first release the lock and remove the con-
nector from its bracket.
LOCKINGPAWL ONOTHERHALF OFPull toorsengageCONNECTORBRACKET
23-3
a Never try to disconnect connectors by pulling on thei.
wires; pull on the connector halves instead.
a Always reinstall plastic covers.
Belore connecting connectors, make sure the lermi-
nals are in Dlace and not bent.
a Check tor loose retainer and rubber seals.
RETAINER
a The backs of some connectors are oacked with
grease. Add grease if needed. It the grease is contami-
nated, reDlace it.
(cont'd)

Connector ldentification and Wire Harness Routing
How to ldentity ConnoctolS:
ldentification numbers have been assigned to all connectors. The number is preceded by the letter ,,C,, for connecrors,"G" for single ground terminals ot "f" hr single non-ground terminals.
Location
HamessEngino CompartmontDarhboardOthors (Floor, Door,
Trunk, Rootl
Starter cablesT1, T2, and (E
Battery ground cableG1 and O
Engine ground cable AT3
Engine ground cable BT4
G3
Under-hood ABS fuse/relav box cableT5 and (D
Engine wire harnessC101 through C134
Tl Ol and T102
G 101
A/C wire harnessCl 5'l through C156
G151
ABS modulator unit wir€ harnessC161 through C168
Engine companment wire ha.nessC3O'l through C32O
G301
Main wire hatnessC2O1 through C223
G2Ol and G2O2
C4O1 through C449
G401
Rear wire harnessC501 through C536
G501, G502 and G5O3
DashboSrd wire harnessC551 through C569
G551
Driver's door wire harnessC601 through C612
Front passenger's door wire harnessC626 through C634
Left rear door wire harness (Sedan)C651 through C654
Right rear door wire harness (Sedan)C656 through C659
Roof wire harnessC661 through C667
Heater sub-harness AC671 through C677
Heater sub-hatness BC681 through C684
ABS sub-harnessC7O1 through C7O6
G7O1, G702 and G703(Sedan)
Tailgate wire harness (Hatchback)C751 through C756
Spoiler sub-ha.ness (Hatchback)C761 through C763
Rear window defogger ground wire(Hatchback)c77'l
G771
SRS main harnessC8O1 through C8O7
G801
23-13