1999 HONDA CIVIC Alternator

Charging System
Alternator Replacement
NOTE: Remove the alternator from below the vehicle.
'1. Make sure you have the anti-theft code for theradio, then write down the frequencies for theradio's preset buttons ('99 - 00 models).
2. Remove the battery negative cable, then disconnectthe positive cable.
3. Disconnect the 4P (or 3P) connector from the alter-naIor.
TERMINAL NUT7.85 N.m (0.8 kgf.m, 5.79lbf.ftl
{ }: Cansd.
4. Remove the terminal
the B terminal.
nut and the WHT wire from
23-120
5. Remove the adjusting bolt and through bolt nut,then remove the alternator belt from the Dullev.
UPPER MOUNTBRACKET BOLT44 N.m 14.5 kgt.m, 33 lbl.ftlALTERNATORAD.'USTING BOLT24 N.rh l2.a kgf.m, 17 lbtft)
ALTERNATORBOLT
a4 N.m 14.5 kstm.33lbf'ftl
LOWER MOUNTBRACKET BOLTSa4 N.m l{.5 kgf.m,33lbfft)
Pull out the alternator through bolt, then removethe alternator.
lf necessary, remove the mount bracket bolts. andthe upper and lower mount brackets
Adjust the alternator belt tension after installation(see page 23-125).
Enter the anti-theft code for the radio, then enter thecustomer's radio station presets ('99 - 00 models).
7.

Charging System
Rectifier Removal (cont'd)
Separate the rear housing from the stator/rectifier
assembly by removing the four screws and the ter-minal nut.
TERMINAL NUT
Unsolder the rectifier from the stator leads,. To avoid damaging the diodes with heat, pinch
the stator leads between pliers to carry heat off,and apply the soldering iron only long enough toseparate the leads from the rectifier.. Use a 100 W soldering iron.
STATOR SOLDERING
7. Install the new rectifier in the reverse order of removal.. Apply the soldering iron only long enough toensure a good connection so the heat will notdamage the diodes.
a Use only a rosin core type solder or solder joints
will corrode.
6.
SOLDERING
23-122
Rectifier Test
NOTE: The diodes are designed to allow current to pass
in one direction while blocking it in the opposite direc-tion. Since the alternator rectifier is made up of ninediodes, each diode must be tested for continuity in bothdirections with an ohmmeter that has diode checkinocapability; a total of 18 checks.
1. Check for continuity in each direction between- the B and P terminals.- the B'and P terminals.- E {ground) and the P terminals.
All diodes should have continuity in only one direc-UOn.
lf any of the diodes fails, replace the rectifier assem-bly, (Diodes are not available separately.)

JRotor Slip Ring Test
1. Check the resistance betlveen the slip rings
There should be 1 8 - 3 0 ohms
. lf resistance meets the specification, go to step 2.
. lf resistance does not meet the specification,
reolace the alternator'
SLIP BINGS
2. Check that there is no continuity between the slip
rings and the rotor or rotor shaft.
3. lf the rotor fails either continuity check, replace the
alternator.
Stator Test
'1. Check that there is continuity between each pair of
leads.
CORE
Check that there is no continuity between each lead
and the coil core.
lf the coil fails either continuity check, replace the
alternator.
ROTOR SHAFT
LEADS
1.
Alternator Brush InsPection
Separate the drive-end housing from the rear hous-
ing as described on page 23-121
Separate the rear housing from the stator/rectifier
assembly by removing the four screws and the ter-
minal nutfrom the rear housing {see page 23-121}
lvleasure the length of the brushes with vernrer
calrpers.
Alternator Brush Length:
O Standard {NEW} @ Service Limit
19.0 mm (0.75 in) 1 5.0 mm (0 20 in)
lf the brushes are less than the service limit, replace
them.
23-123

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

It -Alternator Belt Inspection and Adiustment
Deflection Method:
Apply a force of 98 N (10 kgl,22lbll, and measure the
deflection between the alternator and the crankshaft pul-
ley.
Detlection | 8.0 - 10.5 mm (0.31 - 0.41 in)
NOTE: On a brand-new belt {one that has been run for less
than five minutes). the deflection should be 6.0 - 8.5 mm
(0.26 - 0.33 in) when first measured. If the belt is worn or
damaged, replace it.
CRANKSHAFTPULLEY
lf adiustm€nt is necossary:
1. Loosen the lower mounting nut and the upper mount-
ing bolt.
2, Move the alternator to obtain the proper belt tension,
then retighten the upper mounting bolt and the lower
mounting nut to the specified torques.
3. Recheckthe deflection ofthe belt.
24 N.m (2.4 kgl m,
Belt T€nsion Gauge Method:
Following the gauge manufacturer's instructions. attach
the soecial tool to the belt, and measure the tension.
Tension 340 - 490 N (35 - 50 kgf,77 - 110lbf)
NOTE: On a brand-new belt {one that has been run for less
than five minutes), the tension should be 540 -740 N
(55 - 75 kgf, 121 - 165 lbf) when first measured. lf the belt
is worn or damaged, replace it.
PULLEY BELT TENSION GAUGE
07JGG - 0010104
It adiustment is necossary:
1, Loosen the lower mounting nut and the upper mount-
ing bolt.
2. Move the alternator to obtain the proper belt tension.
then retighten the upper mounting bolt and the lower
mounting nut to the specified torques
3. Recheck the tension of the belt
23-125

IJNOER,DASHFUSE/RELAY BOX
GAUGELIGHTS
l3wx4 l
CHARGINGSYSTEMLIGHT0.4w)
Gircuit Diagram
UNDEN HOOD FUSE/RELAY BOXIJ
N0.30 (7.54)FUSE
f7
I
tlRED/BLK BEO/BLK
l"l"8LK BLU
IJ
l'"^*
I
t-
G401G402
__l
tE2
IFED/BLU
CRUISECONTROTUNIT
fl ,,1:
tH
I c12
IFFD
VDASH LIGHTSBRIGHTNESSCONTROLLEF
l"'WHT/BLU
vALTERNATOR
(With shifi-up indicatd lighl)(wi1h cruise conlrcl system)

In the "OHMS" range, the DVOM will measure
resistance between two points along a circuit.
Low resistance means good continuity.
Diodes and solid-state devices in a circuit can
make a DVOM give a false reading. To check
a reading, reverse the leads, and take a
second reading. lf the readings differ, the
component is affecting lhe measurement.
Jumper Wire
Use a jumper wire to bypass an open circuit.
A iumper wire is made up ot an in-line fuse
holder connected to a set of test leads. lt
should have a five amoere fuse. Never
connect a jumper wire across a short circuit.
The direct battery short will blow the fuse.
Short Finder (Short Circuit Locater)
Short finders are available to locale shorts to
ground. The short tinder creates a pulsing
magnetic field in the shorted circuit whlch you
can follow to the location of the short. lts use
is explained on page 15.
SHORT FINDER
To ordei any test equipment shown above,
contact your local tool supplier. For a list of
suppliers and tool numbers, refer to Honda
Required Special Tools and Equipment
Service Bulletin.
How To Use This Manual
Test Equipment (cont'd)
oa
Troubleshooting Precautions
Before Troubleshooting
1. Check the main fuse and the fuse box.
2. Check the battery for damage, state of
charge, and clean and tight connections.
CAUTION:
. Do not quick-charge a battery unlers
the battery ground cable has been
disconnected, or you will damage the
alternator diodes.
. Do not attempt to crank the engine wlth
the ground cable disconnected or you
will severely damage the wiring.
While You're Working
1. Make sure connectors are clean, and have
no loose terminals or receptacles.
2. Make sure lhat connectors without wire
seals are packed with dielectric (silicone)
grease. Part Number: 08798-9001 .
Pack wllh dlelectrlc (sillcons) greass
When connecting a connector, push it until it"clicks" into place.
Do not pull on the wires when
disconnecting a connector. Pull
only on the connector houslngs.
Most circuits Include solid-state
devlces. Test the voltages In these
circuits only with a lo-megaohm or
higher impedance digital multlm6ter.
Never use a test light or analog meter
on chcuits that contain solld-state
devices. Damage to the devices
may result.
oo

Fuse
NumberAmpsPageFuse Name
(RR WIPER
RR WASHER)
i R HiL HIGH BEAM | 10
L H/L HIGH BEAM
| (PAIV RR-L)
i (P/vv RR-R)
(rGN CO|L)
10I (P,^/V AS)
Component or Circuit Protected
Not used
Not used
Rear wiper, Security system (option)
(Vehicles pre-wired for accessory security system)
'10r 1n-2
I
| 1 10-12i Right headlight, DRL control unit (Canada)
Lett headlight, DRL control unit (Canada)
I ro-rsSecurity system (option)
| 120-2 | Left rear window motor
Right rear window motor
lgnition coil ('98-'00 models except GX)
| 120-1 | Front passenger's window motor
i (PiW DH)| 20 1 12O I Driver's window motor
TURN LIGHTSHazard warning switch
FUEL PUMP
(SRS UNIT)
PGM-FI main relav, SRS unit
(cRUrsE CoNTROL)
/KtrVt trSS\
Stereo radio tuner ('96-'98 USA: LX, EX, and HX),
Cruise control main switch, Keyless door lock
control unit ('99-'00 models with keyless entry)
15ALTERNATOR
SP SENSOR
l-a10-4I ELD unit, Gauge assembly, TCM (96-'98 CW, PGM-FI
16I RR DEF RELAY7.510-8I Rear window defogger ('96-'98 models), ABS control
I unit. Power mirror switch ('99-'00 models except GX)
i-HEATER r/C
I RELAY
Power mirrors ('96-98 models and all GX models),
Air delivery, Blower controls, AilC compressor
controls, Fans
I (RUNNING LIGHT
I RELAY)
1 7.5 1
tl
I DRL control unit (Canada)
i BACK-UP LTGHTSi Back-up lights
(RUNNING LIGHT)DRL control unit (Canada)
I R H/L LOW BEAM'10 l11o-12Right headlight
I L H/L LOW BEAM | 101110-12 | Left headlight
(cont'd)
(SRS)SRS unit
6-1