Acura 2002 RSX Service Manual page 71

Charging System
Charging Gircuit Troubleshooting (cont,d)
Alternator Control System Test (K20A3
engrnel
1. Check for proper operation of the ELD by checking
t h e M I L ( s e e p a g e 1 1 - 3 ) .
2. Disconnect the starter subharness 8p connector.
3. Start the engine, and turn the headlights (high
b e a m ) O N .
4. Measure voltage between the starter subharness
8P connector terminal No. 3 and the positive
terminal of the batterv.
5 .
o .
C {WHT/GRNI
STARTER SUB.HARNESS 8P CONNECTOR
Wire side ol female terminals
ls there 1 V or less?
YES-Go to step 8.
NO Go to step 5.
Turn the headlights and ignition switch OFF.
Disconnect ECM/PCM connector B (24p).
BATTERY
4-30
I
7. Check for continuity between ECM/PCM connector
terminal 818 and body ground.
ECM/PCM CONNECTOR A I24P}
1
2 3
4
5
U
6
8 9 10
13
4 5
1 l
'18
f-t
21 22 23
ACGC {WHT/GRN)
Wire sade of lemale terminals
lsthere continuity?
YES Repair a shon in the wire between the
alternator and ECM/PCM.t
NO Substitute a known-good ECIM/PCM, and
recheck {see page l1-6}.
lf prescribed voltage is now available, replace the
original ECM/PCM. t
8. Turn the headlights and ignition switch OFF.
9. Disconnect ECN4/PCM connector B (24p).
10. Check for continuity between ECM/pCM connector
terminal 818 and starter subharness 8p connector
terminal No. 3.
t,
ACGC (WHT/GRN)
ECM/PCM CONNECTOR B (24P}
2
3
4
5
U
6
B
s
10
'13
J
11
1Bl./
n
21 22
23
24
\l
TI
C (WHT
5 6 7
STARTER SUB.HARNESS 8P CONNECTOR
Wire side of female terminats
ls there continuity?
YES Repair the alternator (see page 4-36).1
NO- Repair an open in the wire between the
alternator and ECM/PCM. I
/GRNI