1994 HONDA INTEGRA electrical

System Description
Electrical Connections
PGM.FI MAII{ RELAY
- rc2l L
IllLii |
ril.i--r {a/Tl
To BAOIATOR FAt!RETAY, CONDENSERFAI{ RELAY
To A/C SWITCH
FUEL INJ€CTORS
@
DATALIIIKco t{EcToR
fUELPUMP
A/C CLUTCH RELAY
FUSES
O BATTERY I1OO AI*
@ oPTroN t50 alr
o rG {50 A).
@ sroP. HoBN {2O Al*
@ BACK UP (7.5 Al*
@ No. 3 INTERIOR LIGHT {7.5 A)
O Ecu (EcMt (1s A)'
@) No. 24 ACG (ALTI 0Gl{15 A: 81881 sngin6,2OA:818C1 6n9ine)
@ No. 15 BAcK-uP LlcHTs llo Al
@ No. 13 REAR DEFROSTER RELAYHEATER MOTOR RELAYCOOLING FAN MOTOR RELAY I7.5 A}
O No. l8 STARTER SIGNAL 17.5 A)
*: UNDER-HOOD FUSE/RELAY BOX
11-12
A/T GEAR

System Description
Electrical Connections (cont'd)
wt{T/GRl{
wL?/nEor
181881 cngr|.lYEUREDtBl8cl .nerEt Flll---------------- YEr/wI{ri | |- YvHrnEr -l | i|AP sEIrsoF I-cn AvHrr ll_l
rHriRED, fl--fwl
Jftfi:]ff*-, I
, REDI'ELGRI{/BLU
YEL/BLURED/8U(GR]I/BLU
cl13 HO2S
cl11
ECT SEI{SOR
IAT SET{SOR
cl19
ALTERI{ATOF
c120
{E
cl15
1E
WHT/GRT{
WHT/REDr
c131
".rro*.fl..Fl
- ll PnEssunE I- atK' 1l swrcH I
cl to
tclrl
11-14
(To psge 1 l -15)

System Description
Electrical Connections (cont'dl
BLI(/YEL
oRI{r
il ".t ttlenn __JlF-----l
ll r Brx_Ll swrcH Ic423 ! caor -L
e s-ot
c405
eaurvxr Jr BLK -l
1-G401 :-
SERVICE CHECKCOIIIIECTOR
DATA LINKcorrttIEcToR
- c40aBRN/BLK fLT BLU IWHT/RED {
BTKiYEL-JT---l
oR 1 ----l I vss IBLK' {l I
c't 16
v:r-,sr-* -J l-----]".*,".u {l
'o" uo.u. I
lA18a1 ongine,
lB18C1 6ngin€)
11-16

System Description
Electrical Connections (cont'dl
160 Al fioo Al
sToP. HORI{ t20 Al
wnrneo
J
,*rr"a* -l
c216wHr/8ru TIYEL/WHT --L
c214wHvem {
auryet{
oR nED -l
-alx {
I "rti'f_ c218
G20r
wxrneo {
"a*,"ao {
c44t)*utwxr
{wHriRED --l
or-rrv:r- {c551-{
nft C4. Af,: Ca13 f- 8rr(/nED -l
- surwxr -{
I{o. 3 lttTERlOR LIGHT
l|5^.llll.n'i'20r!|.c1q*,
o. la STARTERstGI{At- t7.5 Al
No. 15 8ACK-UP LIGHISt10 al
{To ptg€ 11-19,
1 1-18
el3t Fw{T/GRr{ _-]
cR ^i|Hrl 1

PGM-FIIOLE CONTROLFUEL SUPPLY
INTAKEAIR€MtsstoNCONTROLSELECTRICALLOAODETECTOR
VARIAEIE VALVETIMINC & VALVELIFT ELECTRONICcoNTRO|-SOLENOID
VARIABLE VALVETIMING & VATVEI-IFT ILECTRONICcottTR0tPffESSURE
KNOCKstNsoRFISIGNALFISIGNAT
IOLE AIRc0NTR0r-OTHERIOLECONTROLS
FUELINJECTOR
OTHERFUELSUPPTY
| 1"70s3811.74r 1-76t 1-7611-8211-78| 1-102r 1-97t 1-1 15ll129
Er6t-- -------16l-/-----..Efl-o_,.''\
\.-r-l-t l0 t----i-\t2t I/ --i-\
\-!-/
l22 l/-- j--\t23 l-/--.i-\-t 30 l-,--T-\
\.--r-z
t3r t-/-.--\
\.---l
[|-/----\I 16 t-/ _-i- \
@
@
o@
o@@
oQ)
@a,@@
o@@
@o
o
(JJ
@@@o@
11-3

Troubleshooting
Self-diagnostic Procedures (cont'dl
':818C1 engine
a lf codes other than those listed above are indicated, verifv the code. lf the code indicated is not listed above, replace
rhe ECM.
a The MIL may come on, indicating a system problem when, in fact, there is a poor or intermittent electricalconnection.
First, check the electrical connections, clean or repair connections it necessary.
o The MIL and @ indicator light may light simultaneously when the Diagnostic Trouble Code (DTC) 6, 7 or 17. Check
the PGM-Fl system according to the PGM-Fl system troubleshooting, then recheck the l!! indicator light. ll it lights,
see page 14-5O, 51.
a The MIL does not come on when there is a malfunction in the A/T Fl signal or Electrical Load Detector (ELDI circuits.
However, it will indicate the codes when the Service Check Connector is shorted.
DIAGNOSTIC
TROUBLE
CODE (DTCISYSTEM INDICATEDPsge
oENGINE CONTROL MODULE IECM)11-42
,lHEATED OXYGEN SENSOR IHO25)1 1-46
aMANIFOLD ABSOLUTE PRESSURE {MAP SENSOR)11-52
4CRANKSHAFT POSITION (CKP SENSOR)1 1-56
oENGINE COOLANT TEMPERATURE (ECT SENSOR)11-58
THROTTLE POSITION (TP SENSOR}11-60
ITOP DEAD CENTER POSITION (TDC SENSORI1 1-56
9No. 1 CYLINDER POSITION (CYP SENSOR)1 1-56
10INTAKE AIR TEMPERATURE (IAT SENSOR)11-62
13BAROMETRIC PRESSURE (BARO SENSOR}1|-64
14IDLE AIR CONTROL (IAC VALVE}11-42
tcIGNITION OUTPUT SIGNAL11-66
toFUEL INJECTOR1't-102
17VEHICLE SPEED SENSOR {VSSI11-68
20ELECTRICAT LOAD DETECTOR (ELD)'t 1-70
21VARIABLE VALVE TIMING & VALVE LIFT ELECTRONIC CONTROL SOLENOID
VALVE {VTEC SOLENOID VALVE)'6-36
22VARIABLE VALVE TIMING & VALVE LIFT ELECTRONIC CONTROL PRESSURE
SWITCH (VTEC PRESSURE SWITCHI-6-38
23KNOCK SENSOR {KS}-11-7 4
30A/T FI SIGNAL A11-76
3'rA/T FI SIGNAL B1 1-76
4'lHEATED OXYGEN SENSOR (HO25} HEATER11-47
43FUEL SUPPLY SYSTEM1 1-50
11-36

How to Read Flowcharts
A flowchrrt is dasigned to be us€d fiom start to final repair. lt's like a map showing you the shortest distanco. But be-
ware: if you go off tho "map" anywhere but a "stop" symbol, you can easily get lost
l6rffil Desclibas the conditions or situation to start a troubleshooting flowchart.(bold tyDo)
|TeTiONl Asks you to do something; pedorm a test, set up a condition etc'
<:6Eei6io-fr\> Asks you about the result of an action, then sends you in the appropriste troubleshooting direction.
I-SJTFI The snd of a series ot actions and decisions, describes I tinal repair action and aomotimea diracts
(bold typel you to 8n garlier part of the tlowchart to confirm your repair'
NOTE:
a Tha tarm ,,lntormittgnt Failure" is used in these chans. lt simply means a system may have had a failur6, but it chocks
out OK !t this time. lf th6 Msltunction Indicator Lamp (MlL) on ihe dash does not come on, check for poor connections
or loose wires at all connectors rolated to the cilcuit that you are troubleshooting (see illustration b6low).
a Most ot tho troublashooting flowchans have you reset the Engine Control Module (ECM) and try to duplicate the Disg-
nostic Troubls Cod6 (DTC). lf the problem is intermittent and you c8n't duplicat€ the cod6, do not continus through
the flowchart, To do so will only rosult in confusion and, possibly, a ne€dlessly replaced ECM
a ,,opon,'and ,,short,, are common electrical terms. An open is a break in a wir6 or at a conn€ction. A short is an
accidontal connaction ot a wir€ to ground or to another wire. In simple electronics, this usually means som€thing won't
work at all. In complex electronics (like ECM's), this can sometimes mean something wolks, but not the way it's sup-
poSad to,
a il th6 olectricsl readings are not as specified when using the test harness, check the test harness connoctions bsfore
procooding.
LOOSE
11-39

PGM-FI System
Manifold Absolute Pressure (MAP) Sensor
fxai - lfil1 The Malfunction Indicator Lamp (MlL) indicates Diagnostic Trouble Code (DTC) 3: An electrical
-:- -?- problem in the Manifold Absolute Pressure (MAPI Sensor circuit.
The MAP sbnsor converts manitold absolute pressure into electrical signals and inputs the ECM.
OUTPUTVOLTAGE
600 700
(in. Hsl GAUGEREADIIIO{mft Hg)
YEL/RED lBlSBl onginc)YEL^YHT lBlaCl .ngin.l | + I
{+l
SENSOR
1.5
- Tho MIL has boon roportod on.- Wirh tho SCS rhort connoctorconnectod lsoo pags 11-34),codo 3 b indicatsd.
Do the ECM Reset Procedure {soepage 11-35).
Intormittont tailuro, lystom ir Ol(at thls timo {tort drivo may bsnocessary).Chack to? Door connocllon oiloosa wiroa 6t C223 {locltod atright shock tow6rl, C'l 14 (MAP
sonaorl and ECM.
ls the MIL on and does it indi-cate code 3?
Turn the ignition switch OFF.
Disconnect the 3P connector tromthe MAP sensor,
Turn the ignition switch ON.
{To page 11-53)
11-52