Harness connectors HONDA CIVIC 1996 6.G Workshop Manual

Engine RemovaUlnstallation
Removal
@@
1.
. Make sure iacks and salety stands are placed ploperly
and hoist brackets are attached to the correct posi-
tions on the engine.
. Make sure the vehicle will not roll off stands and fall
while you are working under it.
CAUTION:
. Use fender covers to avoid damaging painted sur-face.
. Unplug the wilin9 connectors caretully while holdingthe conngstor portion to avoid damage,. Mark all wiring and hosos to avoid misconnoction.
Also, be sure that they do not contact other wiring or
hoses or interfere with other parts,
Secure the hood as open as possible.
Disconnect the battery negative terminal first. thenthe positive terminal. Remove the battery.
Remove the strut brace (B'16A2 engine).
8 x 1 .25 mm24 N.m {2.4 kgl.m, 17 lbf.ft}
Disconnect the battery cables from the under-hood
fuse/relay box and battery positive terminal.
STRUT BRACE
UNDER.HOODFUSE/RELAYBOX
BATTERY CABLES
5-2
ECM/PCM
(
5. Remove the battery and battery base.
8 x 1.25 mm24 N.m (2.4 kgf.m, 17 lbf ftl
7.
Disconnect the connectors from the ECM/pCM.
Disconnect the main wire harness connector.
MAIN WIRE HARNESSCONNECTOR

13. Remove the throftle cable by loosening the locknut,
then slip the cable end out of the accelerator link-
age.
NOTE;
. Take care not to bend the cable when removing
it. Always replace any kinked cable with a new
one.
. Adjust the throttle cable when installing (see sec-
tion 1 1).
D16Y7 engine:
D16Y5, D16Y8, B16A2 engines:
LOCKNUT
LOCKNUT
14,Disconnect the connectors from the PCM.
Remove the grommet and wire harness clamps,
then pull out the ECM/PCM connectors
6x1.0mm
16. Remove the mounting bolt and lock bolt, then remove
the power steering (P/S) pump belt and pump
NOTE: Do not disconnect the P/S hoses.
816A2 engine:
Remove the adjusting bolt and mounting boits,
then remove the P/S pump belt and pump
(cont'd)
5-5
AOJUSTING

13. Remove the upper radiator hose' heater hose and
water bYPass hose
WATEREYPASSHOSEUPPERRADIATORHOSE
14.
HEATERHOSE
Remove the engine wire harness connectors and
wire harness clamps from the cylinder head and the
intake manifold.
o Four fuel injector connectors
. Engine coolant temperature (ECT) sensor con-
nector
a
a
a
ECT switch connector
ECT gauge sending unit connector
Throttle position sensor connector
Manitold absolute pressure (MAP) sensor con-
nector
Primary heated oxygen sensor (primary HO2S)
connector
Secondary heated oxygen sensor (secondary
HO2S) connector (D16Y7 engine)
Exhaust gas recirculation (EGR) valve lift sensor
connector (D16Y5 engine)
. VTEC solenoid valve connector (Dl6Y5, D16Y8
engrnes)
. VTEC pressure switch connector (D16Y5. D16Y8
engrnes,
. ldle air control (lAC) valve connector
15.Remove the spark plug caps and distributor from
the cylinder head.
Remove the uPPer bracket.
NOTE:
. Use a jack to support the engine before the
upper bracket is removed.
. Make sure to place a cushion between the oil
pan and the jack.
12 x 1.25 mm
74 N.m {7.5 kgf m.
sil lbl.ftl
UPPERBRACKET
'17. Remove the cylinder head cover'
CYLINDERHEAD COVER
(cont'd)
6-29

WATER BYPASS
HOSE
14. Remove the upper radiator hose, heater hose and
water bvpass hose.
HEATER
Remove the engine wire harness connectors and wlre
harness clamps from the cylinder head and the intake
manifold.
Four fuel injector connector
Engine coolant temperature (ECT) sensor connec-
tor
ECT gauge sending unit connector
ECT switch connector
ldle air control (lAC) valve connector
Manifold absolute pressure (MAP) sensor connec-
tor
Throttle position sensor connector
Primary Heated oxygen sensor (Primary HO2S)
connecror
VTEC solenoid valve connector
15.
a
a
a
a
a
\
16.
17.
Remove the spark plug caps and distributor form
the cylinder head.
Remove the upper bracket.
NOTE:
. Use a jack to support the engine before removing
the upp€r bracket is removed.
. Place a cushion between the oil panandthejack.
12 x 1.25 fin74 N.m 17.5 kgtm,
UPPER BRACKET
18. Remove the cylinder head cover.
{cont'd)
6-69

ldle Control System
lgy"t9!"_"ring Pressure (PSPI Switch Signal
('96 - 98 Models, '99 - 00 DlGy5 engine witn fU/f) (USAI
This signals the ECM/ PCN4 when the power steering load is high.
ECM/PCM CONNECTORS
PSP SWITCH 2P CONNECTOR
PSP SW IGRNI
JUMPER l--L I IwfRE -2/
GND (BLKI
Wire side ol female terminais
Inspection o{ PSP switch signal.
Check for an opon in the wire {PSPSW linelr1. Turn the ignition switch ON (ll).2. Measure voltage betweenECM/PCM connecror termi-nals A9 and C16.
Check lor an open in the wire (PSPSW line):1. Turn the ignition switch OFF.2. Disconnecl the PSP switch 2p
3. Turn the ignition switch ON (ll).4. At the harness side, connectthe PSP switch 2P connectorterminals No. l and No.2with a jumper wire.5. Measure voltage betweenECM/PCM connector terminalsAg and C16.
ls there lessthan 1.0 V?
- Repair open in the wirobetween the ECM/PCM lc16land the PSP switch.- Repair open in BLK wirebetwoen the PSP switch andG101.
ls there less than 1.0 V?Check the operation of the PSPswitch:'1. Start the engine2. Turn steering wheel to full
3- Measu re voltage betweenECM/PCM connector terminalsA9 and C16.
ls there battery voltage?
PSP switch signel is OK.
Wire side oI temale terminals
11-212
(To page 11'2'13)

Emission Control System
Evaporative Emission (EVAP) Gontrols (cont'd)
'99 - 0O models only:
The scan tool indicates Diagnostic Trouble Code (DTC) P0451: The Fuel Tank Pressure sensor circuit range/oerformance Droblem.
ECM/PCM CONNECTORS
wire side ot femare terminars sG2 IGRN/BLK)
FUEL TANKPRESSURESENSOR
VACUUMPUMP/GAUGE,0 - 30 in.Hg
FUEL TANKPRESSURE SENSORASSEMBLY
EVAP TWOWAY VALVE
IJ
tl'
Ths MIL has been reDortgd on.DTC m/$1 i3 stored.
Check the tuel tank pros3ure ser|-sor:1. Do the ECM/PCM Reset Proce-dure.2. Remove the tuellill cap.3. Turn the ignition switch ON (ll).4. N4onitor the FTP Sensor volt-age with the Honda PGMTester, or measure voltagebetween body ground andECN4/PCM connector terminalsA29 and C18.
ls there approx. 2.5 V7
Check tho tuel tank pressure !on-soa:1. Remove the fuel tank (seepage 11 2421.2. Remove the fuel tank pres-sure sensor assembly fromthe fueltank.3. Connect the fuel tank PressureSensor sub-harness 6P con-nector to the access panelside connector,4. Disconnect the hose betweenthe EVAP two way valvg andthe fuel tank pressure sensor atthe EVAP two way valve end.5. Connect a vacuum pump tothe open end ofthat hose.6. Turn the ignition switch ON (ll).7. Monitor the FTP Sensor volt,age with the Honda PGMTester, or measure voltagebetween ECM/PCM connectorterminals A29 and C18, andcarefully pump vacuum on thehose one stroke at a time.8. The voltage sho!ld smoothlydrop from the stading approx.2.5 V down to approx. '1.5 V.STOP applying vacuum whenthe voltage drops to approx. 1.5V or damage to the fuel tankpressure sensor may occur.
Does the voltage drop toapprox. 1.5 V and hold?
Sub3titute a known-good ECM/PCM and r6check. It symptom/indicltion 90e3 aw.y, replac\. th€original ECM/PCM.
A (32P)
A973X - 041 -
xxxxx
11-274

Electrical Troubleshooting ('gg - 00 Models)
Troubleshooting Flowchart - A/T Gear position Switch (Short)
NOTE: Record all freeze data before you troubleshoot.
Po$ible Cause
' Short in A/T go.r positionswhch wire. Faulty A/T goar position switch
NOTE: Code P1705 (5)the PCM received twoinputs at the same time.
is caused whengear position
PCM CONNECTORS
LGl (BRN/BLK) LG2 (BRN/BLKI
Wire side of femaleterminals
B {25P1 llD (16P1
. OBD ll Scan Tool indicrtB CodeP1?05.. Solt-diagno3i3 E indicatorlight blink. tive times.
Observo the A/T Gear PositionIndicetori1. Turn the ignition switch ON fit).2. Observe the lVT gear positionindicator, and shift each posi,!on separately.
Does any indicator stay onwhen the shift lever is not inthat position?
The sFtom is OK at thi3 time.Check the wi.e harness for dam-aga.
Do all gear position indicatorsgo out?
Moasure ATP R Voltage:1. Shift to all positions otherthanE.2. Measure the voltage betweenthe DG and 82O o( 822 terfii-nats.
Check tor short in the wirebatwoen tha DB terminal and theA/T go.r porhion switch or A/Tg6ar po3ition indicator, andchock for opon in the wiresbetween the B20 and B22 t€rmi-n.ls and body ground (G10 . tfwir€c rro OK, chsck fo. loo3e tel-ftinal fit in the FCM connectors. llnoceisary, substiiute e known-good FCM and r€check.
ls there battery voltage?
To page 14-85
\
14-84

Troubleshooting Flowchart - Inhibitor Solenoid
NOTE: Record all treeze data betore you troubleshoot
Po$ibls Cause
. Dbconnected solenoid hatness
connedor' Short or opon in inhibitor sole'
noid wire. Faultv inhibitor solenoid
SOLENOID HARNESS8P CONNECTOR
Terminal side of male terminals
. OBD ll Scan Tool indic.td Code
P1882.. Selt-di.gnGis E indicator lighl
indic.tos Code 33.
Mea3ure Inhibhor Solenoid Resid-
ance at the sol€noid Harness
Connector:1. Disconnect the 8P connector
from the solenoid harness
connector.2. Measure the reslstance
betlveen the No 5 terminal of
the solenoid harness connec-
tor and body ground.
ls the resistance 11.7 - 21 0 0?
Check Inhibitor Solenoid lor a
Short Circuii:1. Disconnect the B (22P) con-
nector from the TCM.
2. Check for continuity between
the B1 terminal and bodygro!no.
Repair rhort in the wire ltetwegn
the 81 dnd the bodY ground.
Mea$rr€ Inhibitor Solenoid ResBt'
anoe:1. Connect the 8P connector to
the solenoid harness connec_
IOr.2. Measure the resistance
between the Bl and bodyground.
Reoair loose terminal or open in
the wire betwean the 81 and the
solenoid hame3s connector'ls the resistance 11.7 - 21.0 O?
Ch6ck for loose TCM connectors.
ll necessary, substhule a known_good TCM and techeck.
Wire side of female terminals
14-253

Troubleshooting Flowchart - PH-PL Control Linear Solenoid
NOTE: Record all freeze data before you troubleshoot.
Possibls c.use
. Oisconn6dod solenoid harness
conn6ctol. Short or ooen in PH-PL controllinear solenoid wire. F.ulty PH-PL cont.ol linear sole-noid. ODen in VB SOL wire. Op€n in PGl and PG2 wires orpoor ground lG101l
PCM CONNECTORS
Wire side of female terminals
LGT IBRN/BLKILG2 IBRN/BLK)
(cont'd)
B (25P1 D {16P}
. OBD ll Scan Tool indicates
Codo P1873.. sslt-disgnosis E indicltor lightindicates Code 31.
Mo.surevB SOL Vohagg:1. Turn the ignition switch OFF.
2. Disconnect the 8 (25P) and D(16P) connectors from the
PCM,3. Turn tho ignition switch ON (ll),
4. Measure the voltage between
the D5 and 820 or 822 termi-nals,
Ropair open or shod in the wiJe
bstwaon tho D5 terminal and the
under-dalh tuso/relay box.
Check the Ground Circuh:1. Turn the ignition switch OFF2. Check tor continuity betweenthe terminals 82 and 822 andbetween terminals 810 and820.
Fepair open in tho wiro b€tw€entho torminds 82, 810, 820, and
822 and G101. Repair Poorground (G1011.
(BRN/BLX)
Fo page 14-274
PCM CONNECTOR B (25P|
14-273

Troubleshooting Flowchart - Start
NOTE: Record all freeze data before you troubleshoot'
Clutch Control Linear Solenoid
PCM CONNECTORS
Wire side of lemale terminals
LGl (BRN/BLKI
(cont'd)
14-215
Po$ible Cause
. Disconnected solenoid harness
connedol. Short or open in sta.t clutch
control linear solenoid wiro. Faulty 3tart clutch conttol lin€ar
solenoid' Ooen in VB SOL wire. Open in PGI and PG2 wires or
poor ground {G101)
B l25P) -- o l16P)
'OBD ll Scan Tool indicates
Code Pl879.. self-diagnosis E indicstor light
indicates Code 32.
Measure VB SOL Voltag6:
1. Turn the ignition switch OFF
2. Disconnect the B {25P) and D(16P) connectors {rom the
PCM.3. Turn the ignition switch ON (ll).
4. Measure the voltage between
the D5 and 820 or 822 termi-
nals,
Reprir opon or short in the wire
between the D5 terminal and the
undei-d.sh luse/relaY box.ls there battery voltage?
Check the Ground Ciicuit:'1. Turn the ignition switch OFF.
2. Check for continuity between
the terminafs 82 and 922 and
between terminals 810 and
820.
Rep.ir open in the wire betwesn
the terminab 82, 810, 820. tnd
822 and G101. RePair Poorground lG101l.
ls there continuity?
LGl IBRN/BLK)
To page 14-276
PCM CONNECTOR B {25PI