1996 HONDA CIVIC Eld

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

Electrical Load Detector (ELDI {'96 - 98 Models,'tn - 00 D16Y5 engine with M/T}
The scan tool indicates Diagnostic Trouble code (DTC) P1297: A low voltage problem in the Electrical Load
Detector (ELD) circuit.
ELD 3P CONNECTOR (c35'rl
l-- ,ll l2l3l--f ..
ao (GRN/REDI
Y
ECM/PCM CONNECTOR O I16PI
Wire side of female terminals
Problem verification:'!. Do the ECM/PCM Reset Pro-
cedure.2. Sta rt the engine
3. Turn on headlightslntermittent tailure, sYstem is OK
at this time. Check for Poor con-
nection3 or loose wires at C131
tlocated under righl side of da3h).
C354 (ELDIand ECM/PCM.
ls DTC P1297 indicated?
Ch.ck lor short in the ELD:
Measure voltage between body
ground and the ELD 3P connector
terminal No.3.
ls there approx.4 5 V?
Check for a short in tho wile (EL
linel:1. Turn the ignition switch OFF'
2. Disconnect the ECM/PCM con
nector D (16P)
3. Check for continuity between
body ground and ECM/PCM
connector terminal D16
R6pair short in the wire between
ECM/PCM (D161and ELD.
Substitute a known-good ECM/
PCM and recheck lf symplom/
indication goes awaY, rePlace
the original ECM/PCM
ra
11-179

PGM-Fl System
Elestrical Load Detector |ELD) t'glf - 00 Models except D16y5 engine with M/Tl
The scan tool indicates Diagnostic Trouble Code (DTC) P'1297; A low voltage probtem in the Electrical LoadDetector (ELD) circuit.
ELD 3P CONNECTOR tC354)
EL{GRN/REOI
ECM/PCM CONNECTOB A I32PI
Wire side of lemale terminals
Problem verilication:1. Do the ECM/PCM Reset Pro-cedure.2. Sta rt the engine.3. Turn on headlights.
Inlermittont failur6. systom i3 OKat this time, Chock tor ooor con-nestions or loose wires at C131(locrted undor ight side ot d.shl,C354 (ELDI and ECM/PCM.
Check for short in th6 ELD:Measure voltage between bodyground and the ELD 3P connectorterminal No.3.
ls there approx. 4.5 V?
Check to. a short in the wne (ELlinel:'L Turn the ignition switch OFF.2. Disconnect the ECM/PCM con-nector A (32P).
3. Check tor continuity betlveenbody ground and ECM/PCMconnector terminal A30.
Repair short in the wile betweenECM/PCM lA30) and ELD.ls there continuity?
Sub3titute a known-good ECM/PCM and rech€ck. It symptom/indication goes away. replacethe o.iginal ECM/PCM.
1 1-180

Elestrical Load Detector (ELD) f96 - 98 Models''99 - 00 D16Y5 engine with M/T)
ThescantoolindicatesDiagnosticTroubleCode(DTC)P1298:AhighvoltageproblemintheElectricalLoad
Detector (ELD) circuit
ELD 3P CONNECTOR {G's'I
Wire side ol female terminals
EL IGFN/REDI
Problom vcrificttion:
1. Do the EcM/PClVl Reset Pro-
cedure,2. Start the engine.
3. Turn on headlights.lntarmitt..rt l.ilur., ryttcm b OK
.t thia tim. Ch.ck lor Poo' con-
nections or looaa wir.3 at C131
lbcd.d und.r right ide ol dalhl'
Gl5a {EU)} .nd ECM/PCIYI
ls DTC P1298 indicated)
Ch.ck lor tn oPan in tho wir'
(lGl linol:1. Turn the ignition and head'
liohts OFF2. D]""onn""t the ELD 3P con_
nector-3. Turn the ignition switch ON {ll)'
4. Measure voltage between body
ground and the ELD 3P connec
tor terminal No. '1.
R.oair ogan in tha wira Mw"n
ru". rs ltTEnrlton SP SelSOn
t?.5 A, fu!. in th. undcr-dr3h
tu3e/r.l!Y box .nd ELD.
Chcck lor tn oP.h in thc wire
{GND lincl:1. Turn the ignition switch and
headlights OFF.
2. Disconnect the ELD 3P con_
nector'3. Check for continuity between
body ground and the ELD 3P
connecto. terminal No 2
Raprir opcn in the wira bstwt€n
ELD conncctor lnd G/O2.
Ch.ck lor !n oplo in tha wirc IEL
lin.l:Check for continuity between the
ELD 3P connector terminal No 3
and ECM/PCM connector termi
nal D'16.
Rapaii opcn in the wira b€tw"n
ECM/FCM (I)161 .nd th. ELD'
Ch.d( fo. r m.llunction in thc ELD:
1. Reconnect the ELD 3P con'
2. Start th€ engine and allow it
to idle.3. Wh ile measuring voltage
beNveen ECM/PCM connector
terminals D16 and A9, turn
the headlights on {low).
Does the voltage droP?
Sub3titut. . known_good ECM/
PCM .nd rcch.ct. lt sYmptom/
indication goas away/ iapllc'
thc origin.l ECM/PCM
wire side of lemale termrnals
Wire side of Iemale terminals
t'a
)
1 1-181

PGM-FI System
Elestrical Load Detector (ELDI ('99 - 00 Models except D16y5 engine with M/Tl
The scan tool indicates Diagnostic Trouble code (DTCI Pl298: A high vottage problem in the Etectrical LoadDetector (ELD) circuit.
ELD 3P CONNECTOR (65/0
EL {GRN/REOI
Wire side of fernale terminals
ELD 3P CONNECTOR (CA54I
TIr l2l3l
I crvo
(o) (BrKr
Y
Wire side of lemale terminals
ECM/PCM CONNECTORSA (32P1
Wire side of lemaleEI- IGRN/RED)terminals
ECM/PCM CONNECTORS
A {32P)
Problem ve.itication:1. Do the ECN4/PCM Reset pro
cedure.2. Start the engine.3- Turn on headiights.Inte.mittent teilu.e, svstem is OKat this lime. Chock for Door con-nections or loose wires at Ci31{located under Jight side otdaihl, C354 (ELD) and ECM/PCM.
ls DTC P1298 indicated?
Check for an open in the wire{lG1 line}:1. Turn the ignition and head-lights OFF.2. Disconnect the ELD 3P con
3. Turn the ignition switch ON (ll).4. Measure voltage between bodyground and the ELD 3P connec-torterminalNo. 1.
Repair opon in tho wiro batwe€nNo. 15 ALTERNATOR Sp SENSOR{7.5 A} fuse in th6 undor-dashIuse/reley box and ELD.
ls there battery voltage?
Check for an open in the wiro{GND linel:1. Turn the ignition switch andheadlights OFF.2. Disconnect the ELD 3P connector.3. Check for continuity betweenbody ground and the ELD 3Pconnector terminal No. 2,
Repair open in the wire bstwoenELD connsctor and Gia02.
Check ,or an open in the wire IELlinel:1. Disconnect the ECM/PCM con-nector A (32P).2. Check for continuity betweenthe ELD 3P connector terminalNo. 3 and ECM/PCM connec-tor terminal A30.
Chock fo. a malfunction in the ELD:'1. Reconnect the ELD connectorand ECM/PCM connectorA (32P).
2. Stan the engine and allow itto idle.3. While measuring voltagebetween ECM/PCM connectorterminals A30 and B2O, turnthe headlighrs on ow).
ls there continuity?
Repsir op€n in the wire betweenELD connector and ECM/PCM.
Substitute a known-good ECM/PCM and recheck. lf symptom/indication goes away. replacelh6 original ECM/PCM.
Does the vokage drop?
Wire side of f€male terminals
11-182

I
Fuel Tube/Ouick-Gonnect Fittings
Precautions
!@ Do not smoke while working on the fuel
system, Keep open flames away from your work a.ea'
The fuel tube/quick-connect fittings assembly connects
the in tank fuel pump with the fuel feed pipe. For remov-
ing or installing the fuel pump and fuel tank, it is neces-
sary to disconnect or connect the quick-connect fittings.
Pay attention to lollowing:
. The fuel tube/quick-connect fittings assembly is not
heat-resistant; be careful not to damage it during
welding or other heat-generating procedures
. The fuel tube/quick-connect fittings assembly is not
acid-proof; do not touch it with a shop towel which
was used for wiping battery electrolyte. Replace the
fuel tube/quick-connect fitlings assembly if it came
into contact with electrolyte or something similar.
. When connecting or disconnecting the fuel tube/
quick connect liltings assembly, be careful not to
bend or twist it excessively. Replace it if damaged
A disconnected quick-connect fitting can be reconnecled,
but the retainer on the mating pipe cannot be reused
once it has been removed from the pipe. Replace the
retatner wnen
. Replacing the fuel pump.
. Replacing the fuel leed pipe.
. lt has been removed lrom the PiPe.. lt is damaged.
ACCESS PANEL
I
Disconnestion
!@ Do not smoke while working on the luel
system. Keep open llames away lrom youl work area.
1. Relieve fuel pressure (see pages 11'230,2311.
2. Check the tuel quick-connect tittings for dirt, and
clean if necessary.
3. Hold the connector with one hand and press down
the retainer tabs with the other hand, then pull the
connector off.
NOTE:
o Be carelul not to damage the pipe or other pans
Do not use tools.
. lf the connector does not move, keep the retainer
tabs pressed down, and alternately pull and push
the connector until it comes off easily.
. Do not remove the retainer from the pape; once
removed, the retainer must be replaced with a
new one.
LOCKING PAWL
BETAINER TAB
CONNECTOR
Check the contact area o{ the pipe for dirt and dam-
age.
. lf the surface ls dirty, clean it.
. lf the surface is rusty or damaged, replace the
fuel pump or fuel feed piPe.
4.
(cont'd)
11-227
PIPE

Fuel Supply System
Fuel Tank {cont'dl
39 - (xt models:
Replac6ment
o
@ Do not smoke whire working on fuer system. Ke€p open frama away trom your work area.
1. Relievethefuel pressure (see pages 11-230,23'll.
2. Remove the seat cushion lsee section 2O).3, Remove the access panel fromthefloor.
4. Disconnectthe2P (C565) and3P(CS64) connectors and 6p (C569) connecror.5. Disconnect the hose and quick-connect fiftings (see pages 1l-226,22j),6. Jack up the vehicle, and support it with jackstands.
7. Removethefuel hose joint protector and heat shield.8. Removethedrain bolt. and drainthefuel intoan aporoved container.9 Disconnect the hoses (see page 11-226). Slide back the clamps. then twist hoses as you pull, to avoid damagtng rnem.10. Place a jack, or other support, under the tank,11. Remove the strap nuts, and let the straps fallfree,'12. Removethefuel tank. lf itsticks onthe undercoat applied to its mount, carefully pry itoffthe mount.13. Install thedfain boltwith a new washer. then coat the d rain bolt with Noxrust 124B,Allowthe Nox.ust drv for 20 min-utes.
14. Installthe remaining parts in the reverse order of removal,
Replace.
DRAIN BOLT,19 N.m (5.0 kgf.m, 36lbf.ft)
11-242

Glutch Pedal
Adjustment
NOTE:
. To check the clutch interlock switch and clutch
switch, see section 23.
. The clutch is self-adjusting to compensate for wear.
CAUTION: lf there is no clearance between the mas-
ter cylinder pislon and push rod, the release bearing
is held against the diaphragm spring, which can
result in clutch slippage 01 other clutch problems.
1. Loosen locknut A, and back off the clutch switch (or
adjusting bolt) until it no longer touches the clutch
peoar.
2. Loosen locknut C, and turn the push rod in or out to
get the specified stroke {@} and height (@) at tne
clutch pedal.
3. Tighten locknut C.
4. Thread in the clutch switch {or adiusting bolt) until
it contacts the clutch pedal.
9002)
Turn the clutch switch (or adjusting bolt) in an addi-
tional 3/4 to 1 full turn.
Tighten locknut A.
Loosen locknut B on the clutch interlock switch.
Measure the clearance between the floor board and
clutch pedal with the clutch pedal fully depressed.
Release the clutch pedal 15 - 20 mm {0.59 - 0.79 in)
from the fully depressed position and hold it there.
Adjust the position of the clutch interlock switch so
that the engine will start with the clutch pedal in
this position.
Thread the clutch interlock switch an additional in
3/4 to 1 full turn.
Tighten locknut B.
LOCKNUT B9.8 N.m (1.0 k91.m,7.2 lbt.tt)
INTERLOCK SWITCI{
J
'lL
5.
7.
8.
9.
10.
ASSIST SPRING
-Atl
CLUTCH SWITCH
lo. ADJUSTING BOLTI
LOCKNUT A9.8 N'm (1.0 kgI.m, 7.2 lbf,ft)
LOCKNUT C18 N.m {1.8 kql.m, 13lbf.ft}
@ (STROKE at PEDAL): 130 - 140 mm (5.12 - 5.51 in)
@ (TOTAL CLUTCH PEDAL FREE PTAYI: 12 - 21 mm (0.47 - 0.83 in) includethepedal play 1 10 mm (0.04 - 0.39 in)
@ (CLUTCH PEDAL HEIGHT): ']65 mm {6.50 in) to the floor
@ (CLUTCH PEDAL DISENGAGEMENT HEIGHT): 83 mm (3.27 in) minimum to the floor
12-4