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Battery charging system
2 -Battery charging system
Checking the battery charging system
To check the current flow in the charging circuit, use the "DDS" tester, which is equipped with an inductive clamp-type
amperemeter.
Follow the instructions given in the paragraph
A negative value means that charging system is not powering the loads and a significant amount of current must be
supplied by the battery, which is discharging at the time of the measurement.
Or it is possible to use a multimeter (Sect. 6 - 13,
battery terminals, select the DC scale on the instrument and check for the presence of 14.5 V ±0.5 at an engine speed of
3000 rpm.
Important
If polarity is reversed when clamping the ammeter onto the cable, the sign of the readings will also be reversed, giving
rise to incorrect diagnosis.
Recharging the battery
Examine the label on the battery showing the check intervals in order to determine when to test the voltage.
Charge the battery if the open circuit voltage is lower than 12.8 V. Leaving the battery discharged for more than one
month could damage it. Check the battery charge with a voltmeter.
Always check the condition of the battery before recharging and 1 to 2 hours afterwards.
Important
Pay careful attention to recharging times. Stop charging immediately if the battery becomes too hot to the touch. Leave
"Checking the battery charging
DDS diagnosis
instrument): connect the multimeter probes to the
system" (Sect. 6 - 2).
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