no. 25 HONDA CIVIC 1999 6.G Workshop Manual

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Alternator Control System Test {USA}: '99 - 0O models, except Dl6Y5 {M/T} engine
NOTE: Before testing, check proper operation ofthe ELD by confirming with the MIL (see section 11)'
BATTERY
CAUTION: Be sura lo use a voltmeter
with its plus te.minal conneqted io bat-
tery plus and it3 minus tgrminal to ths
4P connoctot tomrinal No. 2.
Wire side of
female terminals
c(WHT/GRNI
wire side offemale terminals
ALTERNATOR.P CONNECTOR
ECM/PCM CONNECTOR C 13lPI
ECM/PCM CONNECTOR C (31PI
(cont'd)
23-117
Check lor a sho.t in the circuit
{ALTC line):1, Beconnect the 4P connector
to the alternator.
2. Start the engine, and turn the
headlights (high beam) ON.
3. Measure voltage between the
4P connector terminal No. 2
and the Positive terminal of
the battery.
ls there 1 V or less?
Chcck for rn opon in the wire(ALTC lin6l:1. Turn the headlight and igni-
tion switch OFF
2. Disconnect the 31P connector
trom the ECM/PCM.
3. Check for continuity betlveen
the ECM/PCM 31P connectorterminal No. 2 and alternator
4P connector terminal No. 2
Repair opcn in the wire botweon
the alternstoi.nd ECM/PCM.ls there continuity?
Check tor short in the wire IALTC
line):1. Turn the headlight and igni-
tion switch OFF2. Disconnect the 31P connector
from the ECM/PCM.
3. Check for continuity between
the ECM/PCM 31P connector
terminal No. 2 and body
ground.
Substitute a known'good ECM/
PCM, and recheck.It prscribed voltagg is now avail'
abl€, replace tho original ECM/
PCM.
Raoair short in the wite between
the alle.nator and ECM/PCM,
1235618I10
/11611lo191 zo2122
23252621?82930JI
ALTC Wire side of(WHT/GRN) female terminals
o

Gharging System
Rear Bearing Replacement
1. Pull offthe rear bearing,
. Make sure the tips of the bearing puller jaws arethin enough to fit between the bearing and theslip rings.
. Do not reuse the bearing.
SLIP RINGSBEARING PULLER
Use a hand press to install the new bearing. Applypressure only on the inner race to avoid damaging
the bearino.
REAB BEARING
23-124
Alternator Reassembly
1. Push the brushes in, then insert a pin or drill bit(about 1.8 mm diameter) to hold them there.
Heat the rear bearing seat in the rear housing asdescribed on page 23-121. After heating, continueimmediately with assembling before the rear bear-ing seat cools completely,
Put the rear housing/stator assembly and drive-endhousing/rotor assembly together. tighten the fourthrough bolts and pull out the pin.
REARSTATOR ASSEMBLY
After assembling the alternator, turn the pulley byhand to make sure the rotor rotates smoothlv andwithout noise.
BRUSHES
THROUGH BOLT
Iq
%*z
BRUSH AOCESS HOI."E

Gauge Assembly
(Wnh lachomolgr)
I cNfldt--]I CONTRoL II MODULE
I 0cM) :
tvl
i.ll
|
-i;,
i
TURN SIGNAUHAZAROWARNINGswtTcH
Circuit Diagram {cont'd)
Fh"lurous @)- BLrcwHT + BLKryEL
fi'Sfvrous 16r.- veLPAGE
RIGHT
V
IGR&ryE
LEFT
V
I
No.s (104)FUSE
V
IBEO/GRN
lru
8LU4RE0
ABSCONTROLUNIT
-rl
eLui'rvrr
G401G402G401G442
23-132

Vehicle Speed Sensor (VSSI
Troubleshooting
Before testing, inspect the No. 15 (7.5 A) fuse in the under-dash fuse/relay box.
TEST HARNESSOTLAJ _ PT3O2OAREO TEST HARNESSCLIP
PROTECTIVETAPE
TEST HARNESSOTLA' . PT3O2OA
(To next page)
Test the BLK wire:1. Disconnect the 3P connectorfrom the vehicle speed sensor(vss).
2. Connect the test harness(07LAJ PT30200) only to theengine wire harness,3. Connect the RED test harnessclip to the positive probe of a
4. Check for continuity betweenthe RED test harness clip andbody ground.
Repair opon in the BLK wireb€twe€n the VSS and G101.ls there continuity?
Te3t the BLK/YEL wire:1. Connect the WHT test harnessclip to the positive probe of avoltmeter, and connectthe REDtest harness clip to the negativeprobe.2. Turn the ignition switch ON {ll).
Repair open in iho BLK/YEL wirebetween the VSS and the under-d6sh tuse/relav box.
vss
GRN TEST HARNESS
RED TEST HARNESS
WHT TEST HARNESS CLIP
23-140

Fuel Gauge
Gauge/Sending Unit Test
!@ Do not smoke while working on tho fuel
system. Keep open tlame away trom your wotk atea.
NOTE: Refer to page 23-133 for the fuel gauge system
circuit.
'1. Check the No. 25 (7.5 A) fuse in the under-dash fuse/
relay box before testing.
2. Remove the access panel from the floor.
ACCESS PANEL
Disconnect the 3P connector from the fuel gauge
sending unit.
Connect the voltmeter positive probe to the No. 2
terminal and the negative probe to the No. I termi-
nal, then turn the ignition switch ON (ll).
There should be between 5 and 8 V.
. lf the voltage is as specified, go to step 5.
. lf the voltage is not as specified. check for:- an open in the YEUBLK or BLK wire.- poor ground (G552).
Turn the ignition switch OFF.
Attach a jumper wire between the No. 1 and No. 2
terminals, then turn the ignition switch ON (ll).
)\
23-142
1.Check that the pointer of the fuel gauge starts mov-
ing toward the "F" mark.
CAUTION: Turn the ignition switch OFF before thepoinier reaches "F" on ihe gauge dial. Failure to do
so may damage the fuel gauge.
NOTE: The fuel gauge is a bobbin (cross-coil) type,
hence the fuel level is continuously indicated even
when the ignition switch is OFF, and the pointer
moves more slowly than that of a bimetaltype.
. lf the pointer of the fuel gauge does not move at
all, replace the gauge.
. lf the gauge is OK. inspect the fuel gauge send-
ing unit.
Remove the fuel gauge sending unit as shown.
Japan-produced
USA, Canada-produced

J
9. lMeasure the resistance between the No 1 and No. 2
terminals at E {EMPTY), 112 \HALF FULL) and F
(FULL) by moving the lloat.
USA, Canada-produced {Ceramic board type):
Too ot lhe workbench (Bottom of the fuel tank)
ll the resistance readings are beyond the range. replace
the fuel gauge sending unit
Float PositionE1t2F
Resistance (0)105 - 10829.5 - 35.53.5-5
Jaoan-Ploduced (Wire-wound typel:
Float PositionE1/2F
Resistance (O)105 - 11025.5 - 39.5
Low Fuel Indicator Light Test
NOTE: For the low fuel indicator circuit diagram, refer to
the gauge assembly circuit diagram (see page 23'2311.
1. Check the No. 25 (7 5 A) luse in the driver's under
dash fuse/relay box before testing
2. Park the vehicle on level ground.
3.
4.
Drain the luel into an approved container. Reinstall
the fueltank drain bolt with a new washer.
Add less than 4L (1 1 U.S Gal, 0.9 lmp Gal) of fuel,
and turn the ignition switch ON (ll). The low fuel
indicator light should come on within four minutes'
. lf the light comes on within four minutes, go to
step 8.
. lf the light does not come on within four min-
utes, go to step 5.
Remove the access panel lrom the Iloor'
Turn the ignition switch OFF, then disconnect the
fuel tank sending unit 3P connector.
Connect the fuel tank sending unit 3P terminals No'
1 and No. 3 with a jumPer wire
. lf the light comes on, replace the fuel gauge
sending unit (see Page 23 1421
. lf the light does not come on, check for:
- An open in the GRN/YEL wire between the
fuel gauge sending unit and the fuel gauge
- A blown bulb.- A poor ground (G552)
6.
1.
female terminals
8. Add 4L {1.1 U.S. Gal, 0 9 lmp Gal) of fuel The light
should go off within four minutes.
23-143

Interlock System
Control Unit Input Test
1. Disconnect the 8P connector from the interlock con-trol unit.
2. Inspect the connector and socket terminals to besure they are all making good contact.. lf the terminals are bent, loose or corroded, repairthem as necessary, and recheck the system.. lf the terminals look OK, make the followinginput tests at the connector.- lf a test indicates a problem, find and correctthe cause, then recheck the system.- lf all the input tests prove OK, substitute aknown-good control unit, and recheck the sys-tem. lf the check is OK, the control unit mustbe faulty; replace it.
NOTE: lf the shift lock solenoid clicks when theignition switch is turned ON {ll) and you step on thebrake pedal (with the shift lever in E), the shift locksystem is electronically normal; if the shift leve.cannot be shifted from E], test the Aff gear position
switch, park pin switch, and see section 14.
Key Interlock System:
CavityWireTest condition
Reconnect the 8P connector to the interlock control unit.
Shift Lock System:
Cavity WifsTest condition
INTERLOCKCONTROL UNIT
Test: Desired result
Test: Dgsired result
Wire side offemale terminals
Possible cause if result is not obtained
Possible cause if result is not obtained
WHT/BLU
lgnition switch turned toACC (lland key pushed inCheck for voltage to groundiThere should be baftery voltage.Blown No. 48 (30 A) fuse in the underhood fuse/relay boxBlown No. 33 (7.5 A) fuse in the underdash fuse/relay boxFaulty steering lock assemblylkey interlock solenoid)An open in the wire
5WHT
BLKUnder all conditionsCheck for continuity to ground:There should be continuity.
' Poor ground (G401, G402). An open in the wire
6BLK./BLUShift lever in ElCheck for continu;ty to ground:There should be continuity.Poor ground (G401, G402)Faulty Ay'T gear position switchAn open in the wire
2YELlgnition switch ON lll)Check for voltage to ground:There should be banery voltage.
. Blown No. 25 (7.5 A) fuse in the under,dash fuse/relay box. An open in the wire
3YEUBLK
lgnition swirch ON (ll)Check for voltage to ground:There should be baftery voltage.Blown No. 25 (7.5 A) fuse in the under-dash fuse/relay boxFaulty shift lock solenoidAn open in the wire
6BLI(BLUShift lever in ICheck for voltage to ground:There should be 1 V or less.Poor ground (G401, G402)Faulty A,/T gear position switchAn open in the wire
7WHT/RED
lgnition switch ON lll)Brake pedaldepressedCheck for voltage to ground:There should be 1 V or less.Blown No. 52 (15 A) Iuse in the underhood fuse/relay boxFaulty PCMFaulty brake switch (see section 1l)Faulty throttle position {TP) sensor(see section 1'l )An open in the wire
lgnition switch ON (ll)Brake pedalandaccelerator depressed atthe same time
Check for voltage to ground:There sho(Jld be battery voltage.
23-146

Key Interlock Solenoid Test
Remove the driver's dashboard lower cover and
knee bolster (see section 20)
Disconnect the 7P connector from the main w're
harness.
3. Check Ior continuity between the terminals in each
kev oosition according to the table'
4. Check that the key cannot be removed with power
and ground connected to the No. 7 and No 6 termi-
nals
. lf the key cannot be removed. the key interlock
solenoid is OK.
. lf the key can be removed, replace the steering
lock assembly (the interlock solenoid is not avail-
able seParatelY).
1.
Terminal
i*i,r"
- - --\7
lgnition
switch
ACC fl)
Key pushed ino--o
Key releasedo--o
Shift Lock Solenoid Test
't.Remove ths front console (see section 20)'
Disconnect the shift lock solenoid 2P connector'
Connect battery power to the No. 1 terminal and
ground to the No. 2 terminal of the solenoid momen-
Iarrry.
NOTE: Do not connect power to the No 2(-) termi-
nal (reverse polarity) or you will damage the diode
inside the solenoid
Check that the shift lock releases when the release
lever is pushed, and check that it locks when the
release lever is released
lf the solenoid does not work, replace the solenoid'
23-147

Interlock System
Park Pin Switch Test
1, Remove the front console (see section 2Ol.
Disconnect the 4P connector from the park pinswitch.
Check for continuity between the No. 3 and No. 4terminals with:- the shift lever any position other than E, or- the push button pushed in E.There should be continuity.
Check for continuity between the No. 3 and No. 4terminals with the shift lever in E and the push but-ton released. There should be no continuiw. lf nec-essary, replace the park pin switch.
NOTE: Park pin switch 4p connector No. 1 and No.2terminals are lor Ay'T gear position console light.refer to the circuit diagram on page 23-1S0.
23-14A

Test conditionTest: Desired resultPossible cause it result is not obtainedCavity
AIYEL
lgnition switch ON (ll)Check for voltage to ground:
There should be banerY voltage.
. Blown No.25 (7.5 A) fuse in the
under dash fuse/relay box
. An open in the wire
A2RED/BLK
Combination light
switch ON and dash
lights brightness
control dial on full
bright
Check for voltage between
RED/BLK and RED terminals:
There should be batterY voltage.
Blown No. 30 {7.5 A) fuse in the
under-dash tuse/relay box
Faulty combination light switch
Faulty dash lights brightness
controller
An open in the wireA3RED
BLUShift lever in P or ICheck for continuity to ground:
There should be continuitY
NOTE: There should be no
continuity in anY other Position.
. Faulty A/T gear Position switch
. An open in the wire
A10GRNShift lever in E or E
A11REDShift lever in E
412WHTShift lever in E
A13BLK/BLU
Shift lever in E
NOTE: Don't depress
the brake pedal.
A9
YEL+ ]lgnition switch ON (ll)
and shift lever in any
position except Pi
Check for voltage to ground:
There should be battery voltage for
two seconds after the ignition
switch is turned ON (ll), and then
less than 'l V.
Faulty TCM*', PCM*3
Faulty PCM*r
An open in the wire
GRN/err*'
lgnition switch ON {ll)
and shift lever in anY
position except E
A8BLKUnder all conditionsCheck for continuitv to ground:
There should be continuitY.
. Poor ground (G401, G402)
. An open in the wire
414LT GRN
lgnition switch ON (ll)Check for voltage to ground:
. There should be baftery voltage*'
. There should be about 5 V*r
Faulty TCM*', ECM/PCM*'
Faulty PCM*1
An open in the wire
*2: CVT ('96 - 98 models)*3r CVT ('99 - 00 modelsl
23-153