Charging System; Battery Under Charged - Honda BF135A Manual

f. CHARGING SYSTEM

• BATTERY UNDER CHARGED

Is the alternator belt tension correct
(Inspection: P. 3-29)?
YES
Start the engine and let it idle to warm up.
Measure the voltage between the battery
terminals when the engine speed is 3,000
min -1 (rpm).
Is the voltage between the terminals 13.5V
or above?
NO
Check for open circuit in the IG line.
1 Turn the ignition switch OFF and discon-
nect the alternator 4P connector.
2 Measure the voltage between the No. 2
(Yellow/Red) terminal of the alternator 4P
connector and the engine ground.
Alternator
harness side 4P
connector
Viewing from terminal side
Is there the battery voltage with the ignition
switch ON?
Yes
Check for open circuit in the BAT line.
1 Turn the ignition switch OFF and discon-
nect the alternator 4P connector.
2 Measure the voltage between the No. 1
(White/Black) terminal of the alternator
4P connector and the engine ground.
Alternator
harness side 4P
connector
Viewing from terminal side
Is there the battery voltage with the ignition
switch ON?
Yes
Disassemble and service the alternator (P.
6-9).
2-30
NO
YES
NO
NO
BF135A•BF150A
Adjust the alternator belt tension (P. 3-29).
Replace the battery.
Replace or repair the wire harness (Open in
the wire between the alternator and No. 5
fuse).
Replace or repair the wire harness (Open in
the wire between the alternator and the igni-
tion switch).