nsxb23100a.pdf

Charging System
Troubleshooting
If the charging system light is on, or the battery is dead or low, test the following items in the order listed:
1. Battery (see page 23-68)
2. Charging System Light
3. Alternator/Regulator
Charging System Light Test
Does the charging system light
come on?
Start the engine.
Does the charging system light
go off?
Turn the ignition switch off.
Disconnect the 4-P connector
from the alternator.
Turn the ignition switch ON (II).
WHT/BLU wire is OK; perform
alternator/regulator test (see page
23-102).
Does the charging system light
come on?
(To page 23-101)
Charging system light circuit is
OK.
Disconnect the ABS control unit
(C237), EPS control unit (C251),
and the integrated control unit
(C401), as applicable. If the
charging system light stays on,
repair the short to ground in the
WHT/BLU wire.
Turn the ignition switch ON (II).

(From page 23-100)
Turn the ignition switch off.
Check fuse No. 2 (15 A).
Is the fuse OK?
Disconnect the 4-P connector
from the alternator.
Turn the ignition switch on.
Check for voltage in the YEL wire
at the IG terminal of the 4-P con-
nector.
Is there battery voltage?
Ground the WHT/BLU wire at the
L terminal of the 4-P connector.
Does the charging system light
come on?
Perform alternator/regulator test
(see page 23-102).
Replace the fuse.
L (WHT/BLU)
IG (YEL)
View from
terminal side
Repair open in the YEL wire.
Check for a blown charging
system light bulb. If the bulb is
OK. repair open in the WHT/BLU
wire.