Charging Voltage Inspection
Check the battery condition (see Charging Condition In-
Warm up the engine to obtain actual alternator operating
Check that the ignition switch is turned off, and connect
the hand tester [A] to the battery terminals [B].
Special Tool - Hand Tester: 57001-1394
Start the engine, and note the voltage readings at var-
ious engine speeds with the headlight turned on and
then turned off (To turn off the headlight, disconnect
the headlight connector on the headlight unit.).
readings should show nearly battery voltage when the
engine speed is low, and, as the engine speed rises, the
readings should also rise. But they must be kept under
the specified voltage.
Tester (+) to
25 V DC
Turn off the ignition switch to stop the engine, and discon-
nect the hand tester.
If the charging voltage is kept between the values given in
the table, the charging system is considered to be working
If the charging voltage is much higher than the values
specified in the table, the regulator/rectifier is defective
or the regulator/rectifier leads are loose or open.
If the charging voltage does not rise as the engine speed
increases, then the regulator/rectifier is defective or the
alternator output is insufficient for the loads. Check the
alternator and regulator/rectifier to determine which part
Tester (–) to
ELECTRICAL SYSTEM 16-39
14.2 ∼ 15.2 V