Engine Control Module Terminal Arrangement
ECM CONNECTOR A I32P}
ECM CONNECTOR A I32PI
*1: USA*2:818C1 engine*3:A,/T*4: 818C1, 818C5 engines
female terminals
NOTEr Standard battery voltageis 12 V.
{cont'di
LG22A
TerminalWireTerminal nameDescriptionSignal
YELlNJ4 (No. 4 FUEL INJECTOR)Drives No. 4 fuel iniector.With engine running: pulses2BLUlNJ3 (No.3 FUEL INJECTOR)Drives No. 3 fuel injector.
3REDlNJ2 (No.2 FUEL INJECTOB)Drives No.2 fuel injector.
BRNlNJl (No. 1 FUEL INJECTOR)Drives No. l Iuel iniector.
5GRN/REDS 02SHTC (SECONDARY
HEATED OXYGEN SENSORHEATER CONTROL)
Drives secondary heated oxygensensor heater,With ignition switch ON (ll)i battery volrageWith fully warmed up engine runningiduty controlled
6ORN/BLKP O2SHTC {PRIMARY HEAIEDOXYGEN SENSOB HEAIERCONTFOL)
Draves primary heated oxygensensor heater,With ignition swirch ON (ll): battery voltageWith lully warmed up engine running:duty controlled
84G RNI/ELVTS (VTEC
SOLENOID VALVE)Drives VTEC solenoid valve.With engine at low rpm: 0 VWith engine at high rpm: battery voltageIBRN/BLKLG1 (LOGIC GROUND)Ground for the ECM control circuit.Less than 1.0 V at alltimes10BLKPGl (POWER GROUND)Ground for the EC[, power circuit.Less than 1.0 V at all times't'lYEUBLKIGPl {POWER SOURCE)Power source for the ECMcontrolcircuit.With ignition switch ON 1ll): battery voltageWith ignition switch OFF| 0 V
12BLI(8LUIACV(IDLE AIR CONTROL VALVE}Drives IACV.With engine running: about 6 V 10 V(depending on engine speed)
REDPCS (EVAP PURGE CONTROLSOLENOID VALVE)Drives EVAP purge controlsolenoid valve.Wilh engane running, engine coolant above154"F (68'C): duty controlled
GRN/BLUFLR (FUEL PUMP RELAY)Drives fuel pump relay.0 V for two seconds after turning ignitionswitch ON (ll), then battery voltage
17B LVBEDACC (fuC CLUTCH RELAY)Drives A,/C clulch relay.With compressor ON: 0 VWith compressor OFFt baftery voltage
18GRN/ORNMIL (I\4ALFUNCTION
INDICATOR LAMPiDrives MlL.With MIL turned ON:0 VWjth MIL turned OFF: battery vottage
19*,WHT/GRNALTC (ALTERNATOR
CONTROL)Sends alternator control signal,With fully warmed up engine runninglbattery voltageDuring driving with small electrical load: 0 V
20YEUGRNICM (IGNITION CONTROLMODULE)Sends ignition pulse.With ignition switch ON (ll): battery voltageWith engine running: about'10 V(depending on engine speed)22BRN/BLKLG2 (LOGIC GROUND)Ground forthe ECM controlcifcuit.Less than 1.0 V at all times8LKPG2 (POWEfl GROUND)Ground for the ECM power circuit.Less than 1.0 V at all times
24YEUELKIGP2 (POWER SOURCE)Power source for the ECMcontrolcircuit,With ignition switch ON {lli: battery voltageWith ignition switch OFF: 0 V
25*3WHT/BLKVREF (REFERENCE VOLTAGE)Provides reference voltage toother control units,With ignition swirch ON (ll): about 5 VWath ignition switch OFF: 0 V
26. 'PNK/8LU
IAB SOL (INTAKE AIR BYPASSCONTROL SOLENOID VALVE)Drives IAB conlrol solenoidWith engrne running, engrae speed betow5,750 rpm: battery voltageWith engine running, engine speed above5,750 rpm: 0 V
27* IGRNFANC (BADIATOR FANCONTROL)Drives radiator fan relay.With radiator {an running: 0 VWith radiator Ian stopped: battery voltage
2ABLU2WBS (EVAP BYPASSSOLENOID VALVE)Drives EVAP bypass solenoidWith ignition switch ON (ll): battery vottage
29LT GRNVSV (EVAP CONlROLCANISTER VENT SHUT VAVLE)Drives EVAP control canister ventshut valve.Wilh ignilion switch ON lll): banery votrasc
1 1-39
Fuel Tube/Ouick-Connect Fittings
Prgcautions
!@@ Do not smoke while working on the fuel
sysiem. K€ep open flames away from your work area.
The fuel tube/quick-connect fittings assembly connectsthe in-tank tuel pump with the fuelfeed pipe. For remov-
ing or installing the fuel pump and fuel rank, it is neces,sary to disconnect or connect the quick-connect fittings.
Pay attention to following:
r The fuel tube/quick-connect fittings assembly is not
heat-resistanU be careful not to damage it during weld-ing 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 fittings assembly if it came
into contact with electrolyte or something similar.
. When connecting or disconnecting the fuel tube/quick-
connect fittings assembly, be careful not to bend or
twist it excessively. Replace it if damaged.
A disconnected quick-connect fitting can be reconnected,
but the retainer on the matlng pipe cannot be reused once
it has been removed from the pipe. Replace the retainer
when- Replacing the fuel pump.- Replacing the fuel feed pipe.- It has been removed trom the oiDe.- lt is damaged.
RETAINER
I
Disconnection
t!!@ Do not smokc white working on the fuel
system. Keep open flames away from your wotk area.
'L Relievefuel pressure (see page 11-118).
2. Check the fuel quick-connect fittings tor dirt, andclean iI necessary.
3. Hold the connector with one hand and press down
the retainer tabs with the other hand, then pull the
connector off.
NOTE:
. Be careful not to damage the pipe or other parts.
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 pipe; once
removed, the retainer must be replaced with a
new one.
LOCKING PAWL
RETAINER TAB
CONNECTOR
Press down,
4,Check the contacl area of the pipe for dirt and dam,
a9e.- lf the surface is dirty, clean it.- lf the surface is rusty or damaged, replace the fuelpump or fuel feed pipe.
(cont'd)
1 1-1 15
PIPE
The fuel supply system co
high pressure fuel pump, t
fuel pressure regulator. f
damper, and fuel delivery i
delivers pressure-regulated
cuts the luel delivery when
Fuel Supply System
System Description
consists of a fuel tank, in-tank
r, PGM-Fl main relay, fueffilter,
. fuel injectors, fuel pulsation
y and return lines. This system
ed fuel to the fuel injectors and
rn thq engine is not running.
Fuel Pressure
Relieving
Before disconnecting fuel pipes or hoses, release pres-
sure from the system by loosening the 12 mm banjo
bolt on top ol the fuel filter.
Do not smok€ while working on the tuel system,
Keep open flames or sparks away from you. work
arga.
Be sure to relieve fuel pressure while the ignition
swiich is ofl,
Make sure you have the anti theft code for the
radio, then write down the frequencies for the
radio's preset buttons.
Disconnect the battery negative cable from the bat-
tery negative terminal.
Remove the fuelfill cap.
Use a box end wrench on the 12 mm banjo bolt at
the fuel filter while holding the fuel filter with another
wrench.
Place a rag or shop towel over the '12 mm banjo
bolt.
Slowly loosen the 12 mm banjo bolt one complete
tu rn.
1 1-1 18
I
NOTE| Replace the washers whenever the 12 mm banjo
bolt is loosened or removed.
lnsDection
1. Relieve fuel pressure.
2. Remove the 12 mm banjo bolt from the fuel filter
while holding the fuel tilter with another wrench.
Attach the fuel pressure adapter bolt, 12 mm and
the special tool.
3. Stan the engine. Measure the tuel pressure with the
engine idling and the vacuum hose of the fuel pres-
sure regulator disconnected from the fuel pressure
regulator and pinched. lf the engine will not start,
turn the ignition switch ON (ll), wait for two sec-
onds, turn it off, then back on again and read the
tuel pressure.
Pressuro should be:
Bl8Bl engire:
270 - 320 kP. (2.8 - 3.3 kgl/cm' .40 - 47 psi)
818C1, 818C5 engines:
320 - 370 kPa (3.3 - 3.8 kgt/cm' . 47 - g psi)
12 mm
FUEL FILTER
Reconnect vacuum hose to the fuel pressure reguta_ror.
Pressure should be:
818B1 engin€:
250 - 290 kPa (2.5 - 3.0 kgt/cm,, 36 - 4,:t p3i)818C1, B18C5 onginss:
260 - 310 kPa (2.7 - 3.2 kgl/cm,, 38 - 46 psi)
FUEL PRESSURE GAUGE07406 - 004{xr0r
ADAPTER BOIT, i2 mmt90008-PD6_010)
lf the fuel pressure is not as specified, first check the fuelpump (see page 11-123). tf the fuet pump is OK, checkthe following:
. lf the fuel pressure is higher than specified, inspecttor:- Pinched or clogged fuel return hose or line.- Faulty fuel pressure regulator (see page l l _121).. lf the fuel pressure is lower than specified, inspectfor:- Clogged fuel fitter.- Faulty fuel pressure regulator (see page .ll-.121).
- Fuel line leakage.
Fuel Injectors
Rsplac€msnt
!@E oo not smoke during the work. Keep openflames away from your work area.
1. Relieve fuel pressure (see page 1l- g).
2. Disconnect the connectors from the fuel injectors.
3. Disconnect the vacuum hose and fuel return hosetrom the tuel pressure regulatot.
NOTE: Place a rag or shop towel over the hosesbefore disconnecting them.
4. Loosen the retainer nuts on the fuel rail and harnessholder.
Disconnect the fuel rail,
Remove the fuel injectors from the intake manifold.
CUSHIONFINGR.place.
12 N.m11.2 kgt m,I tbfftl
SEALRINGReplace.
VACUUM
FUEL PRESSURE
Testing
@G Do not smoke during the test. Keep opon
flames away lrom your work ar€a.
1. Attach a fuel pressure gauge to the service port of
the tuel filter (see page 11-118).
Pr€ssurs should be:
8188l €ngine:
27O - 320 kPa 12.8 - 3.3 kgl/cmr. 40 - 47 psil
818C1, 818C5 engines:
320 - 370 kPa (3.3 - 3.8 kgrf/cm,, 47 - 54 psi)
{with tho fuol pfossure regulatot vacuum hose dis-
connected and pinchsd)
FUEL PRESSURE GAUGE074t 6 - 004{1001
ADAPTER BOIT, 12 mm(9txt08-PD6-0101
Reconnect the vacuum hose to the fuel pressure
regulator.
Check that the fuel pressure rises when the vacuum
hose from the fuel pressure regulator is disconnect-
ed again.
lf the fuel pressure did not rise, replace the fuelpressure regulator.
VACUUM
FUEL PRESSURER€place.
AA
,il
I
I
Replacem6nl
@ Do not smoke while working on tucl sys-
tem. Keep open flamc away from your work area.
1. Place a shop towel under the fuel pressure regula-
tor, then relieve fuel pressure (see page 11-1'18).
2. Disconnect the vacuum hose and fuel return hose.
3. Remove the.two 6 mm retainer bolts.
NOTE:
. Replace the O-ring.
o When assembling the fuel pressure regulator,
apply clean engine oil to the O-ring and assem-
ble it into its proper position, taking care not to
damage the O-ring.
r1
i
i
11-121
rr*
Fuel Supply System
Fuel Filter
Replacement
Do not smoke while working on fuel system. Koop
open flame away from your work atea.
While replacing the fuel filter, be qaretul to keep a
sate distanco between battery terminals and any
tools.
The fuel filter should be replaced whenever the fuel
pressure drops below the specified value I27o - 32O kPa,
2.8 - 3.3 kgf/cm', 40 - 47 psi (B18C'1, B l8C5 enginesi 320- 370 kPa (3.3 - 3.8 kgtcm' ,47 - 54 psi) with the fuel
pressure regulator vacuum hose disconnected and
pinchedl aiter making sure that the tuel pump and the
fuel pressure regulator are OK.
Place a shop towel under and around the fuelfilter.
Relieve fuel pressure {see page 11-1'18}.
Support the fuel filter with a wrench, as shown,
then remove the 12 mm banjo bolt and the tuel feed
pipe lrom the fuelfilter.
Remove the fuel filter clamp and fuel filter.
lnstall the new fuel filter in the reverse order of
removal, and note these items:
. When assembling, use new washers as shown.
. Clean the tlared joint of high pressure hoses
thoroughly before reconnecting them.
\,,
9.8 N.m {1.0 kgf.m,7.2 tbf.frl
WRENCH
12 mm BANJO BOLT33 N.m 13.4 kgf.m. 25 lbl.ftl
37 N.m (3.8 kgf.m,27 lbf.ft)
CAUTION:
a Do not 3pill brakefluid on the vehicle; it may damege
th€ paid; if brake fluid do63 contact th€ paint. wa3h
it otf immediately with water.
a Plug the end of the clutch pipe and reservoir hose with
a shop towel to prevent brake fluid from coming out.
1. Remove the brake fluid trom the clutch master
cylinder reservoir with a syringe,
2. Disconnect the clutch pipe and reservoir hose from
the clutch master cylinder.
Remove the clutch master cylinder.
NOTE: Do not spill braketluid ontheclutch master
cylinder damper.
CLUTCH PIPE15 N.m {1 .5 kgf'm,11 lbt.Ir)
5.
cLulcHMASTERCYLINDER
Install the clutch master cylinder in the reverse or-
der of removal.
NOTE: Bleed the clutch hydraulic system {see page
I z-ol.cturcHMASTERCYLINDER
Pry out the cotter pin, and pull the pedal pin out of
the yoke. Remove the nuts.
NUTS13 N.m {1.3 kgt.m,9 rbf.ftl
PEOAL PIN
-6rl(P/N 08798-90021
Clutch Master Cylinder
Removal/lnstallation
2-5
T
fi
;ill
Slave Cylinder
Removal/lnstallation
CAUTION:
a Do not spill brakelluid onthe vehicle; it may dameg€
the paint; if brake fluid does coniaqt the paint, wash
it otf immodiaioly wilh w8ter.
a Plug the end of the clutch pipe with a shop towel to
prevent brake fluid from coming out.
-6|1, Super High Temp Urea Grease (P/N
4==? 08798- 9OO2).-='aii^5Fi: Brake Assembly Lube or equivalent rubber
grease.
1. Disconnect the clutch pipe from the slave cylinder.
2. Remove the slave cylinder from the clutch housing.
12-6
-Gl
lP/N 08798
Install the slave cylinder in the reverse order of
removal.
NOTE: Make sure the boot is installed on the slave
.wlin.larCLUTCH PIPE15 N.m 11.5 kgt.m, 11 lbf.ttl
SLAVE CYLINDER
*9002t
I x 1.25 rnm22 N.m 12.2 kgl.m,16 lbl.lt)
.'....-..-:::-9!!!!!i
{Brake Assembly '
Lube)
Bleed the clutch hydraulic system.
a Attach a hose to the bleeder screw, and suspend
the hose in a container ot brake fluid.
a lvlake sure there is an adequate supply ot fluid at
the clutch master cylinder, then slowly pump the
clutch pedal until no more bubbles appear at the
bleeder hose.
a Refill the clutch master cylinder with fluid when
done.
a Use only DOT 3 or 4 brake tluid.
We recommend Genuine Honda Super Duty
DOT 3.
a Confirm clutch operation. and check for leaking
fluid.