2000 HONDA CIVIC o ring

Troubleshooting
Eng ine/P_owertrain Control Module Term inal Arrangement
('99 - 00 Models except Dl6Y5 engine with M/Tl (cont,d)
ECM/PCM CONNECTOR C {31P)Wire side of female terminalsNOTE;Standard
*1;4"/T lD16Y7, D16Y8 ensinel
43: CVI(016Y5 engine)'4: D16Y5, D16Y8, 81642 engin€
ECM/FCM CONNECTOR C 13lPI
is 12 V.
Sig.al
lBLK4/VHTPO2SHTC (PNIMARY HEATEOOXYGEN SENSOB HEATES CONTROL)
Drivss primary hoated orygen sensofWith ignition switch ON (lr)rbanery volageWrh fJly warned up €ngir. ru..i19: duty.oaro ed
2WHT/GFNALTC (ALTESNATOB CONTSOL)Sends aliernalo. control sig nal,With fullywa.med upengine ronning; banery vohaseDuring d.iving with smallelect.icatioad; O V38ED/BLUK5 (KNOCK SENSOR)with sngine knocking: pulses
5WHT/REDATTF {AITEFNATOR FR SIGNAL'Detects slternaror FR si9n.l.With tullywarmed up engine running:O V- batteryvortage(dependingon erectficat toad)
WHT/8LKEGRL (EGN VAIVE LIFTSENSOR)Dete.ts EGR valve lrft sensorsignat.
GRN,4r'l/flTSGl ISENSOE GBOUND)Groond fo. MAP s€nsor.L€ss rhan 1.0 v at alltimes88luCKPP (CKP SENSOR P SIOE'With engine running: pulses9CKPM {CKP SENSOR M SIDEIGround for CKP sensor.
BLU/BLKwlvl (wEc PREssuSE swtTcllSIGNAI)D€tocts VTEC pfessure switch signat,With €ngine at low enginospeed:0VWith engin€ at high engino speed : banery vo ttaae
16PHO25 (PRII\,1AFY HEATEDOXYGEN SENSOR, SENSOR 1)Oetects primary heated oxygen s6nsor lsen-With lhrottle f!l1y open€d from idtewith tuly,wa.med !p engin€: Ebove 0.6 VWilh thronl€ quickly closed: b€tow 0.4 V
FED/GRNMAP (I\,4ANIFOLD ASSOLUIEPFESSUSE SENSOB}Dotocrs i,4AP sensor signsl.With ignitioh switch ON (ll):about 3 VAt idlei6boul 1.0 V (depending on engine speed)18GBN/8LKSG2 (SENSOR GSOUND)Less than 1.0 V aralttimes'19YEUNEDVCCl (SENSOR VOLTAGEIPowersourcero MAPsenso..With ignition swilch ON {ll):about 5 VWirh iqnition switch OFF]0 V20GNNIDCP (TDC SENSOB P SIDEIWith ongine running: pulses218EDTDCI\,I (TDC SENSOR M SIOE)Ground lor TOC aensor.22BTU/NEDCKFP (CKF SENSOR P SIDE)With engine running: p!lses
23VSS {VEHIClE SPEED SENSOR)Wilh ignrt|on swich ON rllr snd lront wl-ee' rotating.cycles 0 V about 5V or baneryvottage
25BED/YELIAT ONTAKE AIF TEi,4PEBA.TUEE SENSOR)Detects IAT senso. signat.With ignition switch ON (ll): about 0.1 4.8 Vldepending on i.take air ternpe.atu re)
268ED,ryVHTECT (ENGINE COOLANTTEI\,I.PESATUBE SENSOR)Oelects ECT sensor signal.With ignirion swirch ON {ll):about0.1 -4.8 V(depending on engine coolant temperatu re)
21NED/BLKTPS (THROTTLE POSITION SEN,SOF)Detects TP sensor signal.Wilh th.onle fully op€n: about 4.a VWith rhronle f!lly closed: about 0.5 V
2aYEVBLUVCC2 (SENSOR VOLTAGE)Provides s6nsor voltag€.With ignirion swirch ON (tt):about 5VWith ignilion swiich OFF:0 V29YELCYPP (CYP SENSOR P SIDE)Wilh €ngrne running: pruses3oBLKCYPM (CYP SENSOR M SIDE]G,ound for CYP sonsor.J1WHT/FEDCKFM (CKF SENSOB M SIDE)Ground fo. CKF sonsorsign6i.
11-94

3.
5.
6.
1.
Fuel Cut-off Control
. During deceleration with the throttle valve closed, current to the fuel injectors is cut off to improve fuel economy at
speeds over the following rpm:. D16Y5 engine (M/T):850 rpm. D]6Y5 engine (CVT), D'16Y8 engine (USA M/T): 920 rpm
. Dl6Y8 engine (USA A,/I), D16Y7 engine (USA A,/T);910 rpm
. D16Y8 engine (Canada M/T), D16Y7 engine (canada): 990 rpm
' D16Y8 engine (Canada M/T): 1,000 rpm
. 816A2 engine: 970 rpm
. Fuel cut-off action also takes place when engine speed exceeds 6,900 rpm (D16Y5, D16Y7 engine; D'16Y8 engine:
7,000 rpm. 816A2 engine: 8.100 rpm), regardless of the position of the throttle valve, to protect the engine from
over-rewing. With '99 Dl6Y7 engine (A,/T) and '99 D16Y8 engine (A./T), the PCM cuts the fuel at engine speeds over
5,000 rpm when the vehicle is not moving.
IVC Compressor Clutch Relay
When the ECM/PCM receives a demand for cooling from the air conditioning system, it delays the compressor from
being energized, and enriches the mixture to assure smooth transition to the A,/C mode
Evaporative Emission (EVAP) Purge Control Solenoid Valve*'
When the engine coolant temperature is above 154'F (68'C). the ECM/PCM controls the EVAP purge control solenoid
valve which controls vacuum to the EVAP purge control canister.
Evaporative Emission (EVAP) Purge Control Solenoid Valve*a
When the engine coolant temperature above 154"F (68"C), intake air temperature above 32"F (0'C) and vehicle speed
above 0 mile (0 km/h) or [Ay'C compressor clutch on and intake air temperature above 160"F (41'C)], the ECM/PCM
controls the EVAP purge control solenoid valve which controls vacuum to the EVAP purge control canister.
Exhaust Gas Recirculation (EGR) Control Solenoid Valve*?
When EGR is required for control of oxides of nitrogen (NOx) emissions. the ECM controls the EGR control solenoid
valve which supplies regulated vacuum to the EGR valve
Alternator Control
The system controls the voltage generated at the alternator in accordance with the electrical load and driving mode,
which reduces the engine load to improve the fuel economy.
ECM/PCM Fail-safe/Back-up Functions
1. Fail safe Function
When an abnormality occurs in a signal from a sensor, the ECM/PCM ignores that signal and assumes a pre-pro-
grammed value for that sensor that allows the engine to continue to run.
2. Back-uD Function
When an abnormality occurs in the ECM/PCM itself, the fuel injectors are controlled by a back-up circuit independent
of the system in order to permit minimal driving.
3. Self diagnosis Function lMalfunction Indicator Lamp (MlL)l
When an abnormality occurs in a signal from a sensor, the ECM/PCM supplies ground for the lvllL and stores the DTC
in erasable memory. When the ignition is initially turned on, the ECM/PCM supplies ground for the MIL for two sec-
onds to check the MIL bulb condition.
4. Two Trip Detection Method
To prevent false indications, the Two Trip Detection Method is used for the HO2S, fuel metering-related. idle control
system, ECT sensor, EGR system and EVAP control system self-diagnostic functions. When an abnormality occurs,
the ECM/PCM stores it in its memory. When the same abnormality recurs after the ignition switch is turned OFF and
ON 0l) again, the ECM/PCM informs the driver by lighting the MlL. However, to ease troubleshooting, this function is
cancelled when you jump the service check connector. The MIL will then blink immediately when an abnormality
occurs,
5. Two (or Three) Driving Cycle Detection Method
A "Driving Cycle" consists ot starting the engine. beginning closed loop operation, and stopping the engine. lf misfir-
ing that increases emissions is detected during two consecutive driving cycles, or TWC deterioration is detected dur-
ing three consecutive driving cycles, the ECM/PCM turns the MIL on. However, to ease troubleshooting, this function
is cancelled when you jump the service check connector. The MIL will then blink immediately when an abnormality
occurs.
(cont'd)
1 1-1 05
.1.

PGM-FI System
(From page'11-111)
Check loi an open in the wires(lGP linesl:1. Disconnect the lueliniector andIAC valve connectors.2. Turn the ignition switch ON (ll).
3, Measu re voltage betweenbody ground and ECM/PCMconnector terminals 81 andBg individually.
- Repair open in the wiro(3)between ECM/PCM lBl, B9land PGM-Fl main relay.- Check tor poor connectionsor loose wires al the PGM-FImain relav.- Test tho PGM-FI main rehy(3.e page 11-237).
ls there battery voltage?
Check tor an open in the wires(PG, LG lines):1. Reconnect the fuel iniectorand IAC valve connectors.2. Measure voltage betweenbody ground and ECM/PCMconnector terminals 82, 810,820 and 822 individually.
Repair open in the wirels)between ECM/PCM and G 101llocated ai the l6ft side of thointaks m.nifoldl thrt h.d morethan 1.0 V.
ls there lessthan 1.0 V?
Check for a short in the wires
{VCCI, VCC2 lin6s}:Measure voltage between bodyground and ECM/PCM connectorterminals C19 and C28 individually.Check toa a 3hort in s 3ensor:While measuring voltagebetween body ground and ECM/PC[/t connector terminals C19and C28 individually, disconnectthe 3P connector of each sensorone at time:. MAP sensor. TP sensor. EGR valve. Fueltank pressure sensor
ls there approx.5 V?
Reoair short in lhe wire betwe.enMAP 3ansor, TP sensor, EGRvalve, Fuel tank pres3ure 3ensorand ECM/PCM {Cl9, C28).
ls there approx. 5 V?
Substiiute a known-good ECM/PCM and racheck. ll symptom/indicetion goes eway, replaceth6 original ECM/PCM.Replace tho sansor that had.pprox. 5 V.
Engine Control Module/Powertrain
('99 - 00 Model except Dl6Y5 (M/Tl
Module (ECM/PCM)
(cont'd)
Control
engine)
ECM/PCM CONNECTOR B {25P)
LG1 (BRN/BLKI
Wire side of female terminals
ECM/PCM CONNECTOR C (31P)
female terminalsvcc2IYEL/BLUIvccl{YEL/RED)
Wire side of female terminals
11-112

Primary Heated Oxygen Sensor {Primary HO2SI (Sensor 1)
t('96 - 98 Models except Dl6Y5 engine with M/Tl
The Heated Oxygen Sensor (HO2S) detects the oxygen content in the exhaust gas and signals the ECM/PCM. In operation,
the ECM/PCM receives the sjgnals from the sensor and varies the duration during which fuel is injected To stabilize the
sensor,s output, the sensor has an internal heater. The Primary HO2S (Sensor 1) is installed in the exhaust manifold.
HO2S:
VOLTAGE {VI
The scan tool indicates Diagnostic Trouble Code (DTC) P0131; A low voltage
Oxygen Sensor (H02S) (Sensor 1) circuit.
R|cH-AIR- - LEANFUELRANO
problem in the Primary Heated
SENSOR
ztRcoNlA
The MIL has be€n teported on.DTC P0131 is siorcd.
Problom verificalion:1. Do the ECM/PCM Reset Pro'
cedure.2. Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on,3. Test-drive with the A/T in Eposition (M/T in 4th gear)
4. Check the Primary HO2S(Sensor 1) output voltage with
the scan tool during accelera-
tion using wide open throttle.
lntcrmift€nt failura, 3Y3tem is OKat this tims. Check for Poor con-nections or loo3e wi.o3 at C123(Primlry HO2S, 3sn3or 1) and
ECM/PCM,
(To page 1I-140)
{cont'd)
1 1-139

Primary Heated Oxygen Sensor (Primary- Fjq?S) (Sensor 1l
('99 - 0b Models exiept D16Y5 engine with M/T)
TheHeatedoxygensensors(Ho2S)detecttheoxygencontentintheexhaustgasandsigna|stheEcM/PcM'|noperation,
the EcM/pcM receives the signars from the sensor and varies the duration during which fuel is injected. To stabilize the
sensor,soutput,thesensornasaninternaIheater.ThePrimaryHo2S(sensorl)isinsta|ledinexhaustmanifo|d(D16Y8.
81642 engine: exhaust PiPe A)
SENSORTERMINALSVOLTAG€ (VI
HEATERTERMINALS
The scan tool indicates Diagnostic Trouble Code (DTC) P0131: A low voltage
Oxygen Sensor (HO2S) (Sensor 1) circuit
RICH+ AIR- - LEANFUELRATIO
problem in the Primary Heated
HEATER
- The MIL has been t€Ported on.- DTC P013'l is stored.
Problem veritication:1. Do the ECM/PCM Reset Pro-
2. Start the engine. Hold the
engine at 3,000 rpm wrth no
load (in Park or neutral) until
the radiator fan comes on
3. Check the PrimarY HO2S
lSensor 1) output voltage wath
the scan tool during accelera
tion using wide open throttle
lntermittont f.ilure, 3ystem i3 OK
at thi3 time. Check tor Poor con'
nections or loose wires el C123
{Primary HO2S, Sensor 1) and
ECM/PCM.
Does the voltage stay at 0 5 v
or less?
Check the fuel pressLlre (see Page11,109).
(To page 11 142)(cont'd)
11-141

Primary Heated Oxygen Sensor (Primary HO2SI (Sensor 1)
('96 - 9b Models except Dl6Y5 engine with M/Tl
PHO29IWHT}
The scan tool indicates Diagnostic Trouble Code (DTC) P0132: A high voltage problem in the Primary Heated
Oxygen Sensor (Primary H02S) (Sensor'l) circuit.
PRIMARY HO2S (Sonso. 'll 4P CONNECToR
tc123t
sG2IGRN/BLKI
Wire side ot female terminals
ECM/PCM CONNECTOR D I16PI
JUMPER WIRE
PHO2S (WHT}SG2 IGRN/BLKI
Wire side of tem6le terminals
Probl€m verification:1. Do the ECM/PCM Reset Pro-
cedure.2. Start the engine. Hold the
engine at 3,000 rpm with no
load (in Park or neutral) until
the radiator fan comes on
3. Test-drive with the A/T in Eposition (M/T in 4th gear)
4. Check the PrimarY HO2S(Sensor 1) oLltPut voltage with
the scan tool during decelera'tion using completely closed
throttle.
Int.rmittont fiilur., system it OK
at thb timo. Chock for Poot con-
nections or loo3a wir63 at Cl23
lPrimarY HO2S, SensoJ 1l .nd
ECM/PCM.
Does the voltage stay at 1.0 V
or more?
Check for an open in the Primary
HO2S:1. Turn the ignition switch OFF.
2. Disconnect the Primary HO2S(Sensor 1) 4P connector'
3. Connect the PrimarY HO25
lSensor l) 4P connector termi-
nals No. 1 and No. 2 with a
4. Turn the ignition switch ON (ll).
5. Check the PrimarY H02S(Sensor 1i outPut voltage with
the scan tool.
lsthere 1.0 V or more?
Check for an open in the wiro
{PHO2S line):1. Turn the ignition switch OFF.
2. Connect EcM/PcM connector
terminals D7 and D11 with ajumper wrre,3. Turn the ignition switch ON lll)4. Check the PrimarY HO2S(Sensor 1) output voltage withthe scan tool,
Replir open in tho wirc b€twccnECM/PCM lo?) and Prim!.Y
HO2S lsonsor 1).ls there 1.0 V or more?
Substitute a known-good ECM/PCM and recheck. lf 3ymptom/indicetion goos awey, roplacethe oliginal ECM/PCM.
11-143

PGM-FI System
Primary Heated Oxygen Sensor (Primary HO2SI (Sensor 1)
('99 - 00 Models except D16Y5 engine with M/T)
The scan tool indicates Diagnostic Trouble Code (DTC) P0132: A high voltage problem in the primary HeatedOxygen Sensor (Primary HO2S) {Sensor I ) circuit.
PRIMARY HO2S ls€n3or 1' 4PCONNECTOR(c123t
PHO2SIWHTI
Wire side of temale terminals
ECM/PCM CONNECTOR C 131PI
sG2(GRN/
BLK)
SG2 IGRN/8LK}
Ware side of female terminals
The MIL has been reported on.OTCP0132 is stored.
Problem vorificalion:1. Do the ECM/PCM Reset Procedure,Start the engine. Hold theengane at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on.Check the Primary HO25{Sensor lioutput voltage withthe scan tool during decelera-taon using completely closedthrottle.
Intermittent tailure, systom k OKat this time. Chock tor poor con-nections or looso wir* at Cl23(Primaly HO2S, Sonsor 1) andECM/PCM.
Check lor an open in the PrimaryH02S:1. Turn the ignition switch OFF.2. Disconnect the Primary HO2SlSensor 1)connector.3. Connect the Primary H02S(Sensor 1)4P connector terminals No. 1 and No. 2 with a
4. Turn the ignition switch ON (ll).5. Check the Primary H02S{Sensor l) output voltage withthe scan tool.
ls there 1.5 V or more?
Check lor an open in th€ wire(PHO25 lin€l:1. Turn the ignition switch OFF.2. Connect ECM/PCM connectorterminals C16 and C18 with ajumper wire.3. Turn the ignition switch ON {lli.4. Check the Primary HO2S(Sensor 1i output voltage withthe scan tool,
Roptir op.n in tho wire betweonECM/PCM lCl6l and Prim.ryHO2S lsensor 11.
ls there 1.5 V or more?
Subsiitute a known-good ECM/PCM and r.check. lf symptom/indication goos away, replecethe original ECM/PCM.
11-144

Primary Heated Oxygen Sensor (Primary HO2S) (Sensor 1l
The scan tool indicates Diagnostic Trouble Code (DTC) P0133: A slow response problem in the Primary Heated
Oxygen Sensor {Primary H02S) (Sensor 1) circuit.
The scan tool indicates Diagnostic Trouble code (DTC) Pl163: A slow response problem in the Primary Heated
Oxygen Sensor (Primary HO2S) (Sensor 1)circuit
Description
By controlling the airlfuel ratio with a Primary Ho2S {Sensor 1) and a secondary HO2S {Sensor 2), the deterioration of the
primary HO2S (Sensor 1) can be evaluated by its feedback period. when the feedback period of the Ho2s exceeds a cer-
tain value during stable driving conditions, the sensor will be judged as deteriorated
when deterioration has been detected during two consecutive trips. the MIL comes on and DTC P0133 or P1163* will be stored'
NOTE: tf DTC P0131, P0132 and/or P0135 are stored at the same time as DTC P0133, troubleshoot those DTCS first' then
troubleshoot DTC P0133. lf DTC Pl 162, P1168 and/or P1169 are stored at the same time as DTC P1163, troubleshoot those
DTCS first, then recheck for DTC Pl163.
Possible Cause
o Primary HO2S (Sensor 'l) Deterioration
o Primary HO2S Heater (Sensor 1)Deterioration
. Exhaust system leakage
Troublsshooting Flowchart
tFol3al
I P1163
- The MIL has been reported on- DTC P0133 and/or Pl163* is
stored,
Problem Verilication:1. Do the ECM/PCM Reset Pro
cedure-2. Connect the scan tool
3. Start the engine. Hold the
engine at 3,000 rpm with no
load (in Park or neutral) until
the radiator fan comes on
4. Connect the SCS service con-
nector.5. Test-drive u nder Iollowing
conditions.- 55 mph (88 km/h) steadyspeed- A/f in D position {M/T in
5th gear)
Until readiness code comes
lntermittent failure, 3Y3tem i3 OK
at thi3 time. Ch.ck lol Poor con-
ncctions or loosc wiros at C123
{C145)! lPrimary HO2S, Sensor 1l
and ECM/PCM.
Replace th6 Prim.ry HO2S (Sen'
sor 11.
*: P'l163 (D16Y5 engine with M/T)
11-145