Honda Civic Service Manual page 1588

Charging System
Troubleshooting (cont'd)
Alternator Control System Test (USA): ,96 - 98 modets, ,99 _ 00 Dl6y5 (M/Tl engine
NorE: Before testing. check proper operation of the ELD by confirming with the MrL
{see section r 1).
BATTERY
CAUTION: Be 3ure to use a voltmot€.
with its plus terminal connected to b.t-
tery plus and its minus terminal to the
{P connectoi tgmrinal No. 2.
c
{WHT/GRNt
Wire side oI
female terminals
ALTERNATOR
.P CONNECTOB
Check for a 3hort in the circuit
IALTC linel:
1. Reconnect the 4P connector
to the alternator,
2. Stan 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 1V or less?
Check for rn opon in tha wire
(ALTC linol:
1 . T u r n t h e h e a d l i g h t a n d i g n i -
tion switch OFF.
2. Disconnect the 32P connector
trom the ECM/PCN4.
3. Check tor continuity between
the ECM/PCM 32P connector
terminal No. 19 and alternator
4P connector terminal No. 2.
Bspair open in thg wire lrstween
the rhern.tor .nd ECM/PCM.
Check for short in the wire (ALTC
linel:
1 . T u r n t h e h e a d l i g h t a n d i g n i
tion switch OFF.
2. Disconnect the 32P connector
trom the ECM/PCM.
3. Check tor continuity between
the ECM/PCM 32P connector
t e r m i n a l N o . 1 9 a n d b o d y
g r o u n d .
Subslitute a known-good ECM/
PCM, .nd .och6ck.
It p.escribod vohago i! now avail-
able, replace the original ECM/
PCM.
Ropair 3hort in the wiro betweon
the ahe.nator and ECM/PCM.
ECM/PCM CONNECTOR A I32PI
'I
a
1 8
I
1 0 1 1
1 2 1 3 1 4 1 5
1 7 1 8
t 9
7
20 2'l
22 21
26 27 30
Wire side of
female terminals
ALTC
(WHT/GRNI
c
{WHT/GRNI
ALTERNATOR
Wire side oI
female terminals
( [ l
T
1 2
1
ECM/PCM CONNECTOB A (32PI
I 2 3
4 7 8 9 1 0 t 1
1 2 1 3 1 4 1 5 1 6
1 7
1 8
20 21 22
23
21
26 27
30
Wire side of
I
AITC
femate terminats
A
(WHT/GRN|
23-116