1999 HONDA CIVIC alternator charging system

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.)

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)

Charging System
See PowerDistribution,pag6 10.
UNDER-HOODFUSE/RELAYBOX
FUSE 15ALT€IIIAIONsP SEII|SOF7.5A
I
t
USA
' BLKAVHTBLKI"VI/HT
-)l,------J
vtEw 50
See PowerDistribution,page 10-5.
* = 96-98rAllmodelsexcept 01685'99 '00: D16Y5 withi.4/T** = '96'98: All models'99r00: D16Y5 witht\4/T, D1685
BATTERY
ALTERNATOR
See PowerDiskibution,page 10.
FUSE 41BATTEFY804
T101
L-----
ELECTFICALLOADDETECTOR(ELO) UNIT
'l
;l
:l
:l;l
:l
tl,l
:l
:l
G1!
- -I POWER-I -. ^ "'.1 , I rnlrn or
(.A1e)Y '(' C17)c2[ : cs
i ELD unit input i ietCrHe! ' ! coNrRoLI I MODULEI Art€rnator : lllerlato.r I (PCM or
i controrsrsnar i t",fl?il"' a:"^y]L- ----,1- - - - J Pq_oro 3'
*. B,'"',1; :.i
i:1E15_'_
_. i
GFN/FED
r i6
GFN/RED
A30
f D16)WHT/REO*Fi
See Ground IDistribution, Ipage 14-5. I
YT
L]
' ""- PHA|O
,.^;?f, :('c;3)T BLXYEL
I i 'r", ".o II'HT/ ll ' U,zscnrl :-' oi .l
, L : (c'r9ill-_- 'c11" 2)u
l9nitionrnput
LOaO
Ground ourpur
22