2-31
BF135A•BF150A
• ALTERNATOR INDICATOR LINE INSPECTION
Start the engine.
Does the alternator indicator
light go OFF?
• Check the alternator indica-
tor light bulb. Replace the
bulb as necessary.
• If the bulb is normal, replace
the alternator indicator light.
End of inspection (Good)
Replace or repair the wire har-
ness (Short in the wire
between the ECM and the
alternator).
YES
Check the No. 5 (15A) fuse.
Is the fuse normal?
Yes
YES
NO
NO
NO
No
YES
Disassemble and service the
alternator (P. 6-9).
NO
YES
YES
YES
Disassemble and service the
alternator.
• Check for short circuit in the
wire harness of the No. 5
(10A) fuse load line. Replace
or repair the main harness if
necessary.
• Replace the No. 5 (15A)
fuse.
Replace or repair the wire har-
ness (Open in the wire
between the ECM and alter-
nator).
Substitute a known-good ECM
and recheck.
Check for open circuit in the
wire harness (White/Blue)
between the ECM and the
alternator.
Is the wire harness normal?
Turn the ignition switch ON.
Does the alternator indicator
lightcome ON?
NO
NO
Check for open circuit in the L
line.
1 Stop the engine and discon-
nect the alternator 4P con-
nector.
2 Connect the No. 4 (White/
Blue) terminal of the alterna-
tor 4P connector to the body
to short using a jumper wire.
Does the alternator indicator
light come ON with the ignition
switch ON?
Check for short circuit in the L
line.
1 Stop the engine and discon-
nect the alternator 4P con-
nector.
Does the alternator indicator
light come ON with the ignition
switch ON?
Alternator
harness side 4P
connector
Viewing from
terminal side
Check the alternator indicator
light.
Is the alternator indicator light
normal?