CranKing Volts low
the cranking voltage is below normal limits, troubleshoot the starter motor with the manufacturer’s
recommended procedure.
CranKing Volts not deteCted
the cranking voltage is not detected.
5.6.4.
if the cranking voltage is normal, press ‘enter’ to begin charging system test.
5.6.5.
Press the ‘enter’ key to view the following screen.
5.6.6.
Press the ‘enter’ key, one of the following three results will be displayed along with the actual
reading measured:
low Charging Volts when test at idle
The alternator is not providing sufficient current to the battery. Check the belts to ensure the alternator
is rotating with the engine running. if the belts are slipping or broken, replace the belts and retest.
check the connections from the alternator to the battery. if the connection is loose or heavily corroded,
clean or replace the cable and retest. if the belts and connections are in good condition, replace the
alternator.
Charging systeM norMal when test at idle
the system is showing normal output from the alternator, no problem is detected.
high Charging Volts when test at idle
the voltage output from the alternator to the battery exceeds the normal limits of a functioning regulator.
check to ensure there are no loose connections and that the earth is connected properly. if there
are no connection issues, replace the regulator. since most alternators have the regulator built in,
this will require replacement of the alternator. the normal high limit of a typical automotive regulator is
14.7 volts +/- 0.05. Check manufacturer specifications for the correct limit, as it will vary by vehicle type
and manufacturer.
5.6.7.
following the charging system at idle, press ‘enter’ for the charging system with accessory loads.
turn on the heater blower to high, high beam headlights and rear demister.
do not
use cyclical loads
such as air conditioning or windscreen wipers.
5.6.8.
When testing older model diesel engines, the operator needs to run up the engine to 2500rpm for
15 seconds. the ‘run engine up’ instruction screen will appear:
5.6.9.
Press ‘enter’ to look for the amount of ripple from the charging system to the battery. one of these two
testing results will be displayed along with the actual testing measured.
ripple deteCted norMal
diodes function well in the alternator/stator.
eXCess ripple deteCted
one or more diodes in the alternator are not functioning or there is stator damage. check to ensure the
alternator mounting is fixed securely and that the belts are in good shape and functioning properly. If the
mounting and the belts are good, replace the alternator.
5.6.10. Press the ‘enter’ key to continue testing the charging system with accessory loads. one of the following
3 results will be displayed along with the actual measured results.
Charging systeM low when test with aCCessory loads
The alternator is not providing sufficient current for the system’s electrical loads and the charging current
for the battery. check the belts to ensure the alternator is rotating with the engine running. if the belts are
slipping or broken, replace the belts and retest. check the connections from the alternator to the battery.
if the connection is loose or heavily corroded, clean or replace the cable and retest. if the belts and
connections are in good working condition, replace the alternator.
crAnKinG Volts
XX.XXV loW
crAnKinG Volts
no detected
mAKe sure All
loAds Are off
Alt. idle Volts
XX.XXV loW
Alt. idle Volts
XX.XXV normAl
Alt. idle Volts
XX.XXV HiGH
turn on loAds
And Press enter
run enGine uP to
2500 rPm 15 sec.
riPPle detected
XX.XXV normAl
no riPPle
detected
riPPle detected
XX.XXV HiGH
Alt. loAd Volts
XX.XXV loW
Press enter for
=cHArGinG test=
or
Original Language Version
© Jack sealey limited
bt2015 | issue:1 17/10/17