1997 HONDA CIVIC Diffe

c105
ffi
C10,1(Canadal
I rlz 3l
16lwHrsEo. -l
I2 BLK/YEL IftlwHri BLUIl'l
cl t3
D
c123
ffil3 4l
c104
l1 2l
l-f.l
c102
F1+..rl1 2 3l
ffl'wHnr€D" --.l
ItrERlxBLa__llo."llBurntotl-l
c101
C11il
ffi
c137
a
c108
ffi
c107
ffi
c106
ffi
c302
tu
c138
A
v
FTBtKiBLtr__llZTYEuBLKi l
NOTE: oDifferent wires with the same color have been given a number suffix to distinguish them (for example, YEUBLKl
and YEUBLK'are not the same).
O: Related to Fuel and Emissions Svstem.a
(cont'd)
11-73
- Connector with male terminals (double outline): View from terminal side
- Connector with female terminals (single outline): View from wire side
.1'BLKYEL6WHT/BLU
eBLKI1YEUGRN
3YEUREO89BLKryVFT5lYEUBLKI10BLK,ryEL
BLK^/EL:d)GBN/BLK'2BLK/YELGRN/8LK'3BLK,YELGRN/BLK'rljGRN/BLK'ELKTYEL12BLI(YELrtGFN/BLK'!l

c122
A,g
l-iln'eo*r,vHr__-ll[lcRNiBLitl]l
cl17
r'trTl
16lBLK,-__-llO BLX,\,E[ |
16l Btu/wil-
c112
ffi
Cliro
o
C1'11
ffi
l6l-ciN/YEL' _-l
NOTE: . Different wires with the same color have been given a number suffix to distinguish them (for example, YEUBLK1
and YEUBLK'are not the same).
O: Related to Fuel and Emissions System,- Connector with male terminals (double outline): View from terminal side
- Connector with female terminals (single outline): View from wire side
c'54*1
frl zlsl
fflErKwH---llOlBLr I
f6lGrrunEp -l
11-75

v1s8l7l6le t0r l!21
' S€cuitAr.h Sysi.m
cL5lwithod cruir. cort?oll
c510 ta/T)
;--F--trt2l
w
l-T - --l
l. - I
elz5{with crui* codrol)
r'ffitr
13 rl
lElwHT"cRN I
YELf,ED/BLK.!
- Connector with male terminals (double outline): View from terminal side
- Connector with female terminals (single outline): View from wire side
Different wires with the same cotor have been given a number suffix to distinguish them (for example, YEUBLKl
and YEUBLK'are not the same).
O; Related to Fuel and Emissions System
Dt!
t-
NOTE: o
a
a(cont'd)
11-77
t213t5
5
14i!aL(LTATU
1
Et0t1,/ ./ie /1Al,/ 20
2a
9t0l213111 /l61718
!t
t1t
23I7a9
101112t3/lr5l/18 t9
12
YEL
YEL3LK2

c130
I10
l112131,4t5ta11t8t9
ct3r
1lz3lt/X61789to
cr34 tEcM/PCM-C)cr35 lPCM-Dr:cr35lPcl|.D,€
ca32
lr 2 3.1
IiGTNiBN Ill
l5l-wxr,nol]ll:a BLX vHI I
NOTE; . Different wires with the same color have been given a number suffix to distinguish them (for example, YEUBLK1
and YEUBLK, are not the samel.
O: Related to Fuel and Emissions Svstem.- Connector with male terminals (double outline): View from terminal side
- Connector with female terminals (single outline): View from wire side
lrl2l
lll* -_-l
tn Bs I
c1a
lr 2l
f.fil
,bl onrrwlrl.lftlBLrwHri-Flirx,lvHJ l]-l
c,|52 tEcM/PCM-Al
\-a
't/3l-1.51
/tgto 'lt12l3
2at6IE e t|0111'12ItItIt[l
11-79

System Descriptions
System Connectors lFuel Pump]
('9!, - 00 models 6xcept Dl6Y5 ongino with M/T)
\(
I
c568
ffi
c565
E
c792
Different wires with the same color have been given a number suffix to distinguish them (for example, YEUBLKIand YEVBLK, are not the same).
O: Related to Fuel and Emissions System.- Connector with male terminals (double outline): View from terminal side- Connector with female terminals (single outline): View from wire side
c793
fr
NOTE: o
a
a
1 1-80

Troubleshooting
Troubleshooting Procedures (cont,dl
ECM/PCM Data
By connecting the OBD ll scan tool or the Honda pGM Tester to the l6p data link connector (DLC), various data can beretrieved from the EcM/PcM. The items Iisted in the table below conform to the sAE recommended practice.The Honda PGM Tester also reads data beyond that recommended bv SAE.understanding this data wil help to find the causes of intermittent fairures or engine probrems,
NOTE:
' The "operating values" given below are approximate values and may be different depending on the environment andthe individual vehicle.. Unless noted otherwise, "at idle speed,, means idling with the engine completely warmed up, Ay'T in position @ or E],M/T in neutral, and the Ay'C and all accessories turned off.
(
DataDescriptionOperating ValueFreeze Data
Diagnostic
Trouble Code(DTC)
lf the ECM /PCM detects a problem, it will store it as acode consisting of one letter and four numbers.Depending on the problem, an SAE-defined code (poxxx)or a Honda-defined code (Plxxx) will be outDut to therester.
lf no problem is detected,
there is no output.
YES
Engine SpeedThe ECM/PCM computes engine speed from the signalssent from the Crankshaft Position sensor.This data is used for determining the time and amount offuel injection,
Nearly the same as
tachometer indication.YES
Vehicle SpeedThe ECM/PCM converts pulse signals from the VehicleSpeed Sensor (VSS) into speed data.Nearly the same as
speedometer indicationYES
Manifold
Absolute
Pressure {MAP)
The absolute pressure caused in the intake manifold bvengine load and speed.With engine stopped:
Nearly the same as atmo-
spheflc pressure
At idle speed:
24 - 31 kPa (180 - 280
mmHg, 7.1 - 11.0 inHg)
YES
Engine Coolant
Temperature
(ECT)
The ECT sensor converts coolant temperature into volt_age and signals the ECM/PCM. The sensor is a thermistorwhose internal resistance changes with coolant temDera_ture. The ECM/PCM uses the voltage signals from theECT sensor to determine the amount of iniected fuel.
With cold engine:
Same as ambient temper,
ature and IAT
With engine warmed up:
176 - 194.F (80 - 90.C)
YES
Heated Oxygen
Sensor {HO2S)(Primary,
Sensor 1)(Secondary
Sensor 2)
The Heated Oxygen Sensor detects the oxygen contentin the exhaust gas and sends voltage signals to theECI\4/PCM. Based on these signats, the ECM/pCM con_trols the airlfuel ratio. When the oxygen content is high(that is, when the ratio is leaner than the stoichiometricratio), the voltage signal is lower.When the oxygen content is low (that is, when the ratiois richer than the stoichiometric ratio), the voltage signalis higher.
0.0 - 1.25 V
At idle speed:
about 0.1 - 0.9 V
NO(Sensor 1)
1 1-86

Emission Control System
Exhaust Gas Recirculation (EGR) System (D16yS engine)
Doscription
The EGR system is designed to reduce oxides of nitrogen emissions (NOx) by recirculating exhaust gas through the EGRvalve and the intake manifold into the combustion chambers. lt is composed of the EGR valve. EGR vacuum conrrot vatve.EGR control solenoid valve. ECM and various sensors.The EcM contains memories for ideal EGR valve lifts for varying operating conditions, The EGR valve lift sensor detectsthe amount of EGR valve lift and sends the information to the ECM. The ECM then compares it with the ideat EGR valve liftwhich is determined by signals sent from the other sensors. lf there is any difference between the two. the EcM cuts cur-rent to the EGR control solenoid valve to reduce vacuum applied to the EGR valve.
EGR CONTROLCVT: SOLENoID vALvE
EGN VALVE LIFT SENSOR
BLK
I
I
11-254

J
Transaxle
cf utch .""""" 12'1
Manual Transmission ............"'.'..".'...'. 13-1
Automatic Transmission ........ "........ " ". 1 4-1
Differential ... 15-1
Driveshafts ." 16-1