1999 HONDA CIVIC fuse

lgnition System
Circuit Diagram :'98-00 models
UNDER HOOD FUSUFELAY BOX'x'E;;;;-;;;;l /; l-*;- Ecw.cM
ffiwFnBLK<-wHr\9-
Y
tlBTKTYEL YEUGRN
IGN]TIONswtTcHUNDER,DASHFUSE/BELAY BOX
YEt
J
BLK
J
FED
+
*1 :H TACHI*2 :TEC
9 *IBLU'
23-104

Jlgnition Control Module (lCMl Input Test
NOTE:
. See section 1'l when the malfunction indicator lamp
(MlL) turned on.
. Perform an input test for the ignition control module
(lCM) after finishing the fundamental tests for the
ignition system and the fuel and emissions systems
1. Remove the distributor ignition (Dl) cap, the distrib-
utor ignition (Dl) rotor and the leak cover (TEC).
2. Disconnect the wires from the lCM.
HITACHI:
BLK/YEL
TEC:
Turn the ignition switch ON (ll). Check for voltage
between the BLK/YEL wire and body ground.
There should be battery voltage.
. lf there is no battery voltage, check the BLK/YEL
wire between the under-dash fuse/relay box and
rhe lcM.
. lf there is battery voltage, go to step 4.
Turn the ignition switch ON (ll). Check for voltage
between the wire*r and body ground
There should be battery voltage.
. lfthere is no battery voltage, check:
- the ignition coil.
- the wire*1 between the ignition coil and the
tcM.
. lf there is battery voltage, go to step 5
*1: BLU'wire (HITACHI)
WHT/BLU wire (TEC)
Disconnect the EcM/PCM connector A (32P). Check
for continuity on the YEUGRN wire between the
ECM/PCM and the lCM.
There should be continuity.
Check for continuity on the YEUGRN wire to body
ground.
There should be no continuity.
Check for continuity on the BLUl wire between the
test tachometer connector and the ICM
There should be continuitY.
Check for continuity on the BLUl wire to body ground.
There should be no continuity.
lf all the tests are normal, replace the ICM
7.
23-109

Charging System
Component Location Index
UNDER.HOOD FUSE/RELAY BOX/*Has replaceable ELECTRICAL LOAD II DETECTOR (ELD) UNIT '
Troubleshooting, page 23-1 14Replacement, page 23-120Bectifier Removal, page 23,121Rectifier Test, page 23-122Rear Bearing Replacement, page 23-j24
*ELD unit: USA
CHARGING SYSTEM LIGHT(ln the gauge assembly)Test, page 23- l14
BATTERYTest, page 23-91
ALTERNATOR BELTInspection and Adjustment, page 23-t25
[]
23-112

Circuit Diagram
IJNDER HOOD FUSEi RELAY BOX
-
BATTERY
LGNlTIONSWITCH
I
,'-F\I BAT I Gl /
\l_/
I
GRN/RED
I
N0.41 (80A) ,-a No 42 (40A)
ECM/PCM
f7
IWHT/RED
CHARGINGSYSTEMLIGHTI
TWHTi BLU
1323-1
ALTERNATOF

Charging System
Troubleshooting
lf the charging system light does not come onthe order listed below:
1. Baftery (see page 23-91)
2. Charging system light
3. Voltage
4. Alternator control system (USA)
5. Alternator/regulator
Charging Systom Light Test
or does not go off, or the battery is dead or low, test the following items in
ALTERNATOR 4P CONNECTORIUSA)
Wire side offemale terminals
IG(8LK/YEL}
ALTERNATOR 3P CONNECTORlC.nadal
Wre side oftemale terminals
[ ]: Canada
23-114
Charging Svstem Light Check-l :lvlake sure the charging systemlight comes on.
Check for a blown No. 15 t7.5 A)fuso .nd a blown charging sys-tom light bulb. ll the fuse .ndbulb .re OK, ropair the open inth6 WHT/BLU wi16.
Does the charging systemlight come on?
Charging System Light Chec*-2:Start the enoine.
Does the charging systemlight go off?
Volta96 ChecklMeaslre the voltage at the No. 1lNo. 2l terminal of the 4P [3Plcon-nector with the ignition switch ONflr).
R6p.ir the op6n in the BLK/YELwire b€twsen tho altornator andund€r-dash tuso/.glay box.
ls there battery voltage?

IJCircuit Diagram
UNDER DASHIGNIT ON SWITCH FUSEIRELAY 8OX
6 |-;;;;lii "ir"'t*Tl-l
BLK yEL -J
GRN
III
I
\.7VECM/PCM
ENG NECOOLANTlEMPERATURE (ECT)SWTCHfclosed : Above 'l
L r99"F (93"C) _l
BLKTRED
I
I
1,,*"_
T-'
IBtK
I
I
G201
UNDER.HOOD FUSElRELAY BOX
No 41 (8041 No 42 (40A)

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)

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