1999 HONDA CIVIC Brake

PCM CONNECTOR B {25P)
Wire side of {emale terminals
CONNECTOR B (25P)',
*1i USA model*2: A/T (D16Y7, Dl6Yg engine)*3: CVT (D16Y5 engine)*4: M and Dl6Y7 engane*5: Except A.rT and 016Y7 engine*6: A,/T (D16Y8 engine)*7r CVT (D16Y5 engine) and D16Y8 engine*8: '96 D16Y8 engine (coupe),'97 D16Y8
models, sedan: KL model),'98 Dt6Y5
engine,'99 00 Dl6Y5 1M/Ti engine
*9: D16Y5 engine*10: M/T (D16Y5 engine)*11: Except M/T {D16YS engine}*12i D16Y5, D16Y8 engine* 13: D16Y8 engine*14: D16Y7 engine*15: '97 Dl6YTengine (coupe: KL model, sedan: KL (LX) model)''98D16Y7 engine (cont,d)engine (coupe: allengine,'98 D16Y8
FCMNOTE: Standard battery voltage is 12 v'
erminalTnumoer
Wirecotol
TerminalnameDescriptionSignal
1LS_ (LINEAR SOLENOID
VALVE - SIDE)
Ground for linear solenoid valveWii-ignnion switctr oN {ll}: pulses
2REDLS+ (LINEAR SOLENOIDVALVE + SIDE)
-Drii6l linear solenoid valveWith ignilion switch uN (lll: pulses
3BLU/YEL
SHA {SHIFT CONTROLSOLENOID VALVE A)
-Drives shift control solenoid valve AWith engine running in 2nd,3rd gears:
battery voltageWith engine running in 1st,4th gears:
about 0 V
4GRN/BLKLC B (LOCK'UP CONTROL
SOLENOID VALVE B}Drives lock up control solenoid
valve B.
With lock-up ONI battery voltage
With lock-up OFF:0 v
5YELLC A (LOCK.UP CONTROLSOLENOID VALVE A)Drives lock up controlsolenoidWith lock-uP ON: baftery voltage
With lock-up OFFi 0 V
8PNKATPD3 (NT GEAR POSI.
TION SWITCHi
Detects Py'T gear Position switch
signal.
In [D31 position: 0 V
ln ;y other position: battery voltage
1lGRN^lr'HT
SHB (SHIFT CONTROLSOLENOID VALVE B)DnGs shift conttol solenoid valve BWith engine running in 1st,2nd: battery
vo|taqeWith;ngine running in 3rd,4th: about 0 V
12WHT/REDSLU (INTERLOCK CON
TBOL UNIT)
-DlivEilite'lock control,rnit.With ignition switch ON (ll) and brake
pedal depressed: 0 V
13GRN/BLK
D4 IND (D4 INDICATORLIGHT)
Drives D4 indicator light.With Pll indicator lrght turneo urr: oarterv
voltaoeWith ld indicator light turned OFF: 0 v
14WHTNMSG {MAINSHAFTSPEED SENSOR GROUND)
GZiiI'for mainshaft speed sensol
With engine running: Pulses
In E position: 0VIn any other position: battery voltage
REDNM {MAINSHAFT SPEED
SENSOR)
Detects mainshaft speed sensor
srgnal.
ATPR {M GEAR POSI
TION SWITCH)
Detects M gear Position switch
signal
't1BLUATP2 {A/T GEAR POSITION SWITCH)
Detects A/T gear Position switch
signal.
In E position: 0VIn any other position: battery voltage
22GRNNCSG (COUNTERSHAFT
SPEED SENSOR GROUND)Ground for countershaft speed
sensor.
23BLUNC (COUNTERSHAFT
SPEED SENSOR)
Detects countershaft speed sensor
signal.
Vvith ignition switch ON (ll), and front
wheels rotating: Pulses
24YELATPD4 {M GEAF POSI-
TION SWITCH)
Detects M gear Position switch
signal.
ln E position:0 VIn any other position: 5 V
25LT GRNATPNP (A"/T GEAR POSITION SWITCH)
Detects A/T gear Position switch
srgnal,
In E orE position:0 V
In any other position: battery voltage
!a
11-89

ECM/PCM CONNECTOR D I16P)
Wire side ot female terminals
ECM/PCM CONNECTOR D l16P)NOTE: Standard battery voltage is 12 V
Te.minalnumb€r
Wirecolor
Terminaln!meDor.riptionSignal
RED/BLKTPS (THROTTLE POSITION
SENSOR}
Detects TP sensor signal.With throttle fully open: about 4.8 V
With throttle fully closedl about 0.5 V
REDA/VHTECT {ENGINE COOLANTTEMPERATURE SENSORDetects ECT sensor signalWith ignition switch ON{ll): about 0.1 - 4 8 v
(depending on engine coolant lempe ratu re)
3RED/G RNMAP {MANIFOLD ABSO'LUTE PRESSURE SENSOR}Detects MAP sensor signal.With ignition switch ON(ll): about 3 V
At idle: about 1.0 V
{depending on engine speed)
YEUREDVCCl (SENSOR VOLTAGE)Power source lor MAP sensor.With ignition switch ON (ll): about 5 v
With ignition switch OFF: 0 V
5GRNMHTBKSW {BRAKE SWITCHIDetects brake switch signalWith brake pedal released: 0 v
With brake pedal depressed: baftery voltage
6*?RED/BLUKS {KNOCK SENSOR}Detects KS signal.With engine knocking: Pulses
1
PHO2S (PRIMARY HEAT-ED OXYGEN SENSOR,SENSOR 1)
Detects Primary heated oxygen
sensor (sensor 1l signal
With throttle fullv opened from idle with
Iully warmod up engine: above 0.6 V
With throttle quickly closed: below 0.4 v
LABELDetects LABEL resistanceWith engine r!nning:about 0.3 - 4.9 V
8RED//ELIAT (INTAKE AIR TEM-PERATURE SENSOR)
Detects IAT sensor signal.With ignition switch ON (ll): about 0 1 -
4.8 V {depending on intake air temperature)
9*lWHT/BLKEGRL iEGR VALVE LIFT
SENSOR)
Detects EGR valve lift sensor signalAt idle without vacuum: about'1 2 V
With 27 kPa (2OO mmHg,8 in. Hg): about 4 3 V
10YEUBLUVCC2 (SENSOR VOLTAGE)Provides sensor voltage,With ignition switch ON(ll): about 5 V
With ignition switch OFF:0 V
11GRN/BLKSG2 (SENSOR GROUND}Sensor ground.Less than 1.0 V at alltimes
12G RN,4/1r'HTSG1 (SENSOR GROUND)Ground for MAP sensor.Less than 1.0 V at alltimes
GRN/BLK*1?SHO25G (SECONDARY
HEATED OXYGEN SEN'
SOR, SENSOR 2 GROUND)
Ground for secondary heated oxy-
gen sensor (sensor 2).
14WHT/REDSH02S (SECONDARY
HEATED OXYGEN SEN'soR, sENsoR 2)
Detects secondary heated oxygen
sensor (sensor 2) signal.With throftle fully opened lrom idle with
fully warmed up engine: above 0.6 V
With throttle quickly closed: below 0.4 V
15|3. *15LT GRNPTANK {FUEL TANK PRES.
SURE SENSOR)
Detects fueltank prgssure sensor'With fuelfill caD opened: about 2.5 V
16*1GRN/RED
EL (ELD)Detects ELD signal.With parking lights turned on at idle: about
2.5 - 3.5 VWith low beam headlights turned on at
idle: about 1.5 - 2.5 V
*1: USA model*2r A/T (D16Y7, D16Y8 engine)*3: CVT (D16Y5 engane)*4: A,/T and Dl6Y7 engine*5: Except A/T and D16Y7 engine*6: A"/T (D16Y8 engine)i7: CVT (Dl6Y5 engine) and Dl6Y8 engine*8: .96 D16Y8 engine (coupei,'97 D16Y8 engine
models, sedanr KL model),'98 016Y5 engine,
engine, '99 - 00 D16Y5 (M/T) engine
*9: D16Y5 engine*10: M/T (D16Y5 engine)*11: Except M/T (Dl6Y5 engine)* 12r D16Y5. D16YB engine*13: D16Y8 engine*14: Dl6W engine*15: '97 D16Y7 engine (coupe: KL model, sedan: KL lLX) model),'98D16Y7 engine:(coupe: all'98 D16Y8
(cont'd)
1 1-91

Troubleshooting
Engine/P_o,wertrain Control Module Terminal Arrangement('99 - 00 Models except Dl6Y5 engine with M/Tl
ECM/PCM CONNECTOR A (32P)Wire side ot temale terminalsNOTE:Standard battery voltage is l2 V
ECM/PCM CONNECTOR A I32PI
Sign!l
3BLU2WSS (EVAP 8YPAsS SOLENOIDDrives EVAP bypass solenoid vatve,With gn'tion swnch ON (lll banery votlage
LT GRN/I/VIITVSV {EVAP CONTNOL CANISTERVENTSHUTVALVE]Drives EVAP controt ca n isrer v€nt shutWilh ignilion switch ON {tl): b€ttery vottage
8LU/GNNC8S (CRUISE CONTSOL SIGOown shift signal inpot lrom c.uise conrrolWhen crurss control is used:purses
68ED/YELPCS {EVAP PURGE CONTROLSOTENOIOVALVE)Drives EVAP purge conrrol sotenoid vatve.With engine running, engine cootant, betow r54.F (6a,C):
With engine.unning, €ngine coolant, abov€ 154.F(68'C): duty conlrolled
YELATPD {AT GEAR POSITIONSWITCH)ootects A/T gear posnion swilch s,gnar.In otherthan @ posilion: Apprcx. 5 V
8BLK,IflHTSO2SHTC (SECONDARY HEATED OXYGEN SENSOS HEATEFCONTFOL)
Drives sscondary h€ared oxygen senso.Wilh isn,rion swirch ON (ll):banery votraseWith lully warm6d dp€ngire runn'ng:dury controled
LT GRNATPNP (AT GEAF POSITIONSWITCH)oereds A/T 9€a r position switch signat.In Parr or neulrsl:0 VIn anyother position approx.5 v
t088NSCS (SERVICE CHECK SIGNAL)Oetects ssruice check connecror signal(the signalcausing a OTC indication)with rh€ t6rminal connected: 0 vWith the rerm ina I disconneded: abour 5 V of ban€ry
GNN/BIKD4IND (D4INDICATON]Drives Oa indicaio. lighr.With D4 indicator lightturned ON: O VWith D4 indicator lightturned OFF: battery vo ttageG8N/YETFTF (FUEL PUI\,4P SELAY)Orivos tuel pump relay,0V for two s€conds lfrer turnrng rgnilior swtcn ON(ll), then batt€ry voltage11BTI(REDACC (Al/C CTUTCH SELAY)Drives A./C clutch reray.With compressor ON:O VWilh comp.ssor OFF; battery vottage18GFN/OFNMI! (A,IAIFUNCTION INDICA.TOF LIGHT)With MlLturned ON:0 VWith l\,llL tornod OFF|batrery votrsge198tuNEP (ENGINE SPEED PUTSEIOulputs6ngine speed pulse,Wilh engin6.unning: putses
20GFNFANC {SADIATOR FAN CONTnoL)Orives radiarortan relay.Wirh r.distor t6n running:OVWith radiatortan stopped: banery vottage21ELUA/ELK LINESends and r€ceives s.an lool signal.With ignition switch ON (ll):p!ts€s
22'lBLUATP L {AT GEAS POSITIONswtTcH)Oelocis A"/T gear posirion switch siSnat.In othfflhan E position: Apprcx. 5 V
23SHO25 (SECONOARY HEATEDOXYCEN SENSOR, SENSOF 2)Detects secondsry hoar€d oxygen sensorWith lhronle f! lly or'6ned from idte with fu ywarmod up engine: above 0.6 vWiih th.onl6 quickb, closd:below 0,4 V24STS ISTAFTEN SWITCH SIGDebcrs staner switch signat.Wirh srarterswitch ON (tttJ: batteryvottogeWith sraftsr cwirch OFF:0 V26GFNPSPSW iPlS PNESSURESWITCII SIGNAL)Derecrs PSP switch signat.Atidle with steoring wheolin srraightahead position: O VAt idl6with steering wheetal fult lock: barery vo ttags27BLU/REOACS (AJC SWITCH SIGNALJOer*ts ,ay'C swirch signat.Wiih ty'C switch ON;0VWilh Ay'C switch OFF|aboor 5VWHT/REDSLU iINTERLOCK CONTROIUNIT)Drivos interloct control unit.With ignltion switch ON (ll)and brake pedaldepresed: batlory volrage29LT GRNPTANK (FUEL TANK PFESSUEESENSOR)Oer6ds lu€l tank pr€ssura sonsor signat.Wilh ig.rrrd swirch ON rttr and fuetti

cap ooen6d.
30GRN/FEOEr (ELOIWith parking lighlsrurned on ar idteiaboui 2.5- 3.S VWirh low beam he€dlig hts turnqd on ai idts: aboul 1.52.5 V32GRN/'WHTAKSW (BFAKE SWITCH)Detets brak€ swrtch signEt,With brake pedal r6l€ased:0 VWhh brake pedaldepres*d: battery voltEse'1:A./T (D16Y7, D16Y8 engine)*2: rvt/T13: CVT (D16Y5 engine)
11-92

PGM-FI System
System Description
CKP/TDC/CYP Sensor
MAP Sensor
IAT SensorTP SensorEGR Valve Lift Sensor*'Primary H02SSecondary HO2SVSSBARO SensorELD*'KS€Starter SignalALT FR SignalAir Conditioning SignalA/T Gear Position SignalBattery Voltage {lGN.1}Erake Switch SignalPSP Switch SignalFuel Tank Pressure Sensor*iVTEC Pressure Switch*5Clutch Switch Signal*6Countershaft Speed SensornBMainshaft Speed Sensorrs
-\
----t /
F;ilrr j"-----fi-tri-'r.;l
Fb"t."'i" d" c;;il
F,h"'c;;tr*".io";-l
@."r.l"sc;;ll
EaM/PcM B""k-p F"""till
r\
-:/
Fuel IniectorsPGM-Fl Main Belay {Fuel Pump)MILIAC Valve!y'C Compressor Clutch RelayRadiator Fan Relay*,Condenser Fan RelayALT*'lcMEVAP Purge Control Solenoid
Primary HO2S HeaterSecondary H02S HeaterEGR Control Solenoid Valve*rEGR valve*6EVAP Bypass Solenoid Valve*'EVAP Control Canister Vent Shut
VTEC Solenoid Valve*5DLCLock-up Control Solenoid Valve*aShift Control Solenoid Valve*3Linear Solenoid Valve*3
*1: Dl6Y5 engine*2: USA model*3: CW (D16Y5 ensine), D16Y8 engine and 81642 ensine*4: '96 D16Y8 engine lcoupe),'97 Dl6Y7 engine (coupe: KL model, sedan: KL (LX) model),'97 D16Y8 engine {coupe: all models, sedan: KLmodel),'98-all models,'99'all models,'00-all models+5: D16Y5, D16Y8,816A2 engine*6: M/T (D16Y5 enginei*7: CVT 1D'l6Y5 engine)+8: A/T (D16Y7, D16Y8 engine)*9: '96 D16Y5 engine,'96 D16Y7 engine,'96 Dl6Y8 engine (sedan),'97 D16Y5 engine,'97 Dl6Y7 engine (coupe: KA, KC models, sedan:KA, KC, KL (LX) models, hatchback: all models),'97 D16Y8 engine (sedan: KA, KC modelsi
PGM-FI Sy3lem
The PGM-Fl system on this model is a sequential multipon fuel injection system.
Fuel iniector Timing and Duration
The ECM/PCM contains memories for the basic discharge durations at various engine speeds and manifold air flow rates.
The basic discharge duration, after being read out from the memory. is further modified by signals sent from various sen-
sors to obtain the final discharge duration.
ldle Air Control
ldle Air Control Valve llAC Valve)
When the engine is cold. the A,/C compressor is on, the transmission is in gear, the brake pedal is depressed, the P/S load
is high, or the alternator is charging, the ECM/PCM controls current to the IAC Valve to maintain the correct idle speed.
lgnition Timing Control
. The ECM/PCM contains memories for basic ignition timing at various engine speeds and manifold air flow rates.
lgnition timing is also adjusted for engine coolant temperature.
. Aknockcontrol system was adopted which sets the ideal ignition timing for the octane rating ofthegasoline used.*3
Othgr Control Funqtions
1. Starting Control
When the engine is started, the ECM/PCM provides a rich mixture by increasing fuel injector duration.
2. Fuel Pump Control
. When the ignition switch is initially turned on, the ECM/PCM supplies ground to the PGM-Fl main relay that sup-plies current to the fuel pump for two seconds to pressurize the fuel system.. When the engine is running, the ECI\4PCM supplies ground to the PGM-FI majn relay that supplies current to the fuel
oumo.
. When the engine is not running and the ignition is on, the ECM/PCM cuts ground to the PGM-FI main relay which
cuts current to the fuel pump.
11-104
INPUTS
ENGINE CONTROL MODULE (ECMY
POWERTRAIN CONTROL MODULE (PCM) OUTPUTS

PGM-FI System
Vehicle Speed Sensor (VSSI ('96 - 98 Models,'99 - 00 D16Y5 engine with M/Tl
@The scan tool indicates Diagnostic Trouble Code (DTC) P0500: A malfunction problem in the Vehicle SpeedSensor (VSS) circuit Iexcept A!/T (D16Y7, D16Y8 engine)1.
The scan tool indicates Diagnostic Trouble Code (DTC) P0501: A range/performance problem in the VehicleSpeed Sensor (VSS) circuit [A,rT {D16Y7, D16Y8 engine)].
ECM/PCM CONNECTORS
A {32P} LG.t
VSS IBLU/WHT}
Wire side ot temale terminals
LGI(BRN/8LK}
The MIL has been reDorted on.DTC P0500 or P0501 is stored.
Problem verification:1- Test drive the vehicle.2. Check the vehicle speed withthe scan tool.
Intermittent tailure, system is OKat this time. Check tor Door con-nections or loose wires at C117{VSSland ECM/PCM.
ls the correct speed indicated?
Check for an open in the ECM/PCM:1. Turn the ignition switch OFF.2. Elock the rear wheels and setthe parking brake.3. Jack up the front of the vehicleand support it with safetystands.4. Turn the ignition switch ON (ll).
5. Block the right tront wheel andslowly rotate the left front
6, Measure voltage between theECM/PCM connector termi-nals C18 and A9.
Subslitute a known-good ECM/PCM and recheck. lf symptom/indic.tion goes away, replace theorisinal ECM/PCM.
Does the voltage pulse 0 Vand 5 V?
Check tor a short in ihe ECM/PCM:1. Turn the ignition switch OFF.2. Disco n n ect the ECM/PCMconnector C (31P).
3. Turn the ignition switch ON {ll).4. Block the right front wheeland slowly rotate the left front
5. Measure voltage between theECM/PCM connector terminalsC18 and A9.
Substitute a known-good ECM/PCM and recheck. lI symptom/indication goes away. replacethe original ECM/PCM.
Does the voltage pulse 0 Vand s V?
- Repair short in the wirebetwGen ECM/PCM {C18} endvss, TcM.- Repair open in the wirebetween ECM/PCM {Cl8} andvss.- lf wire is OK, test the VSSlsee section 23).
{BRN/BLK}
239l0lt
121611t8t9202321
2A2930
c {31P}
I38191o
tl12ialr5i6l10./
I2356a9l011
12l3l5t61tl8t920222a
27202930
12910
t2l13l.l7I l,/ 1,/231r.lslt., ),rlL
VSS {BLU/WHT}
11-176

fFosoo-l
lFosoil
Vehicle Speed Sensor (VSS) ('99 - 00 Models except Dl6Y5 engine with M/T)
Thescantoo|indicatesDiagnosticTroub|ecode(DTc)Po5o0:Ama|functionproblemintheVehic|espeed
Sensor (VSS) circuit lexcept A//T (D16Y/, D16Y8 engine)l'
Thescantoo|indicatesDiagnost|cTroub|eCode(DTC)Po5o1:Arange/performanceprob|emintheVehicle
SDeed Sensor {VSS) circuit tA,/T (D16Y7, D16Y8 engine)1.
ECM/PCM CONNECTORS
B {25P)
I
t
Wire side ol lemale terminals
ECM/PCM CONNECTORS
B E5PI
The MIL has been reported on
OTC P0500 or P0501 is stored.
Problem veritication:1. Test-drive the vehicle.
2. Check the vehicle speed with
the scan tool
lntermitt6nt failure, sYstem is OK
at thb time. Check tor Poor con-
nections or loose wir6 at C117
{vss} .nd ECM/PCM
ls the correct sPeed indicated?
Check for an open in the ECM/
PCM:1. Turn the ignition switch OFF.
2. Block the rear wheels and set
the parking brake
3. Jack uP the front ofthe vehicle
and support it with safety
stands.4. Turn the ignition switch ON (ll).
5. Block the right front wheel and
slowly rotate the left front
6, Measure voltage between the
ECM/PCM connector termi_
nals C23 and 820.
Substituto a known'good ECM/
PcM and rech€ck. ll sYmptom/
indic€tion goes awaY, lsplace the
original ECM/PCM.
Does the voltage Pulse 0 V
and 5 V or battery voltage?
Check for a short in the ECM/
PCM:1. Turn the ignition switch OFF.
2. Disco n n ect the EcM/PcM
connector C (31P).
3. Turn the ignition switch ON (ll)
4. Block the right front wheel
and slowly rotate the left front
5. Measure voltage between the
ECM/PCM connector terminals
C23 and 820.
Substiiute . known-good ECM/
PCM and r6check. lf symptom/indication goes awaY, rePlace
the origin.l ECM/PCM.
Does the voltage Pulse 0 V
and 5 V or battery voltage?
- Reoair short in the wire
between ECM/PCM {C23} and
vss. TcM.- Repai. open in the wire
between ECM/PCM {C231 andvss.- lf wire is OK, tesr the VSS
{see sestion 23).
Wire side oI female terminals
11-177

1.After the engine starts, the lAc valve opens for a certain time. The amount of air is increased to raise the idle speed
about 150 - 300 rpm.
When the coolant temperature is tow, the IAC valve is opened to obtain the proper fast idle speed. The amount of
bypassed air is thus controlled in relation to the engine coolant temperature'
IOLE SPEED
lrpml
176
80
ENGI ECOOLANI TEMPERATURE
t" Fl
toc)
ll
't.Whentheid|espeedisoutofspeciiicationandthescantoo|doesnotindicateDiagnosticTroub|ecode(DTc)P0505
or P1508. check the following items:
. Adiust the idle speed {see page 11-220}
. Starter switch signal (see page 11-202)
. Air conditioning signal (see page l1-204)
. ALT FR signal (see Page 11-2081
' Brake switch signal (see page 11-210)
. PSP switch signal (excapt Canada model) (see page 11-212)
. A,/T gear position signal {see section 14, Dl6Y5 engine (CVT):
page 11-216). Clutch switch signal (D16Y5 engine with M/T) (see page 11-218)
. Hoses and connections
' IAC valve and its mounting O-rings
lf the above items are normal, substitute a known-good IAC valve and readjust the idle speed (see page 11-220)
|ftheid|espeedsti||cannotbeadjustedtospecification(andthescantoo|doesnotindicateDTcP0505orP]50S)
after IAC valve replacement. substitute a known-good ECM/PCM and recheck. lf symptom goes away, replace the
original ECM/PCM.

ldle Control System
Brake Switch Signal ('96 - 98 Models, '99 - 00 Dl6YS engine with M/Tl
This signals the ECM/PCM when the brake pedal is deoressed.
LGlBKSW(GRN/WHTI
D {16P)
Wire side of female t€rminals
Inspection of Brake Switch Signal.
Are the brake lights on withoutdepressing the brake pedal?
Depress the brake pedal.
Inspect the HORN (15 A) fuse inthe under-hood fuse/ relay box.Do the brake lights come on?
- Repair short in the wirebetween the brake 3whch andrhe HORN 115 At lu3e.- Replace the I|oRN 17.5 A) tus€.
Repair open in the wirebetween the brake switch andthe HORN 115 Al fuse.Inspect th6 br.ke switch {s6€section l9l.Check tor an open in the wireIBKSW line):1. Oepress the brake pedal.2. Measure voltage betweenECM/PCNI connector terminalsAg and D5 with the brake pedaloepresseo.
Repair open in the wire b€tweenthe ECM/PCM {Dsl and the brakeswitch.
ls there battery voltage?
Brakc switch sign.l is OK.
ECM/PCM CONNECTOFS
A (32PtIBRI\v
,la678101112I
121311151617t8192022232aI9101112
25212Aa3013141516
11-210