Troubleshooting - Acura 3.5 RL Manual

Troubleshooting

If the charging system light does not come on or does not go off, or the battery is dead or low, test the following items in
the order listed below:
1. Battery (see section 23)
2. Charging System Light (see below)
3. Alternator/Regulator (see page 4-27)
Charging System Light Test
Check the No. 20 (7.5 A) fuse in
the under-dash fuse/relay box.
Is the fuse OK?
Check for an open in the L circuit:
1. Disconnect the 4P connector
from the alternator.
2. Ground the No. 3 terminal of
the 4P connector.
3. Turn the ignition switch ON (II).
Does the charging system
light come on?
Disconnect the No. 3 terminal
of the 4P connector from the
ground.
Does the charging system
light go off?
Check for a short to body ground
in the L circuit:
1. Turn the ignition switch OFF.
2. Disconnect the ABS control
unit (C447) and passenger's
multiplex control unit (C401),
as applicable.
3. Turn the ignition switch ON (II).
Does the charging system
light stay off?
Check for short in control unit(s):
1. Turn the ignition switch OFF.
2. Reconnect the ABS control
unit connector.
3. Turn the ignition switch ON
(II), and check the charging
system light.
Did the light stay off when you
turned on the ignition switch
after connecting ABS control unit
connector?
Substitute a known-good ABS
control unit, and recheck.
Replace the fuse.
Check for a blown charging sys-
tem light bulb. If the bulb is OK,
repair the open in the WHT/BLU
(To page 4-26)
Turn the ignition switch OFF, and
repair the short to ground in the
WHT/BLU wire.
Substitute a known-good pas-
senger's multiplex control unit,
and recheck.
ALTERNATOR
4P CONNECTOR
Wire side of
female terminals