1999 HONDA CIVIC ABS

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Page 293 of 2189

HONDA CIVIC 1999 6.G Workshop Manual System Description
Vacuum Connections (contdl
D16Y8 engine l99 - 00 modetsl:
(]-i PAIMARY HEATEO OXYGEN SENSOR {PRIMARY HO2S,SENSOR 1)..2r SECONOARY HEATEO OXycEN SENSOB ISECONDARYHO2S, SENSOR 2li3)

Page 295 of 2189

HONDA CIVIC 1999 6.G Workshop Manual System Description
Vacuum Connections (contd)
Dl6Y7 angin6 (97 coup.: KL mod€l, sedan: KL (LX) model,,9g modet):
i1] PRIMARY HEATED OXYGEN SENSOR (PRIMARY HO2S,SENSOR 1)E) SECONDARY HEATED OXYGEN

Page 296 of 2189

HONDA CIVIC 1999 6.G Workshop Manual Dl6Y7 engins (99 - 00 modelsl:
PRIMARY HEATED OXYGEN SENSOR {PRIMARY HO2S,
SENSOR 1)iiconoanv neareo oxYGEN sENsoR ISECoNDARY
HO2S, 9ENSOR 2)MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
ENGINE COOLANT TEM

Page 297 of 2189

HONDA CIVIC 1999 6.G Workshop Manual I
a
System Description
Vacuum Connections (contd)
816A2 engine:
@ EvApoRATtvE EMtsstoN tEvAp) puRGE coNTRoLSOLENOID VALVE@ PURGE JoINT€t EvApoRATtvE EMtsstoN (EVApt coNTRoL caNtsTERQA EVAPORATIVE E

Page 311 of 2189

$HONDA CIVIC 1999 6.G Workshop Manual System Description Electrical Connections (99 - 00 Models except D16Y5 engine with M/Tl (contdl UFTSENSOR L ABS CONTROL UNIT CONI{ECTOR- BLX _r "* \ sEnucE cSEcKCONNECOR 11-42 aLul- _--r ".* "to$

Page 352 of 2189

HONDA CIVIC 1999 6.G Workshop Manual lf the inspection for a particular code requires voltage or resistance checks at the ECM/PCM connectors, remove the right
kick panel. Pull the carpet back to expose the ECM/PCM. Remove the ABS control

Page 354 of 2189

HONDA CIVIC 1999 6.G Workshop Manual Probable Cause List lFor th€ DTC Chart, see page 11-971*: 99 - 00 models
Probable GausePageSystem
11 1-107Engine Control Module (ECM)/Powertrain Control Module (luM)
PGM-Fl main relay
l^^iti^n cwe

Page 355 of 2189

HONDA CIVIC 1999 6.G Workshop Manual 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

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

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