JBM 52233 Bedienungsanleitung Seite 10

SYSTEM TEST:
1. Select "SYSTEM
from the main menu.
2. Turn off all vehicle accessory
loads such as light, air con-
ditioning, radio, etc. Before
starting the engine.
3. When the engine is started, one of the three results
will be displayed along with the actual reading me-
asured.
CRANKING VOLTS NORMAL
The system is showing normal
draw. Press «ENTER» to per-
form the charging system test.
CRANKING VOLTS LOW
The cranking voltage is below
normal limits, troubleshoot the
starter with manufacturers re-
commended procedure.
CRANKING NOLTS NOT DE-
TECTED
The cranking voltage is not de-
tected.
4. Press «ENTER» to begin charging system test.
PRESS ENTER FOR
CHARGING TEST
5. Press the «ENTER» key, one of the three results
will be displayed along with the actual reading me-
asured.
HIGH CHARGING
WHEN TEST AT IDLE
The voltage output from the al-
ternator to the battery exceeds
the normal limits of a functioning
regulator.
Check to ensure there is no loose connection and the
ground connection is normal. If there is no connection
issue, replace the regulator. Since most alternators
have the regulator built-in, this will require you to re-
place the alternator. The normal high limit of a typical
automotive regulator is 14.7 volts +/- 0.05. Check ma-
nufacturer specifications for the correct limit, as it will
vary by vehicle type and manufacturer.
CHARGING SYSTEM NORMAL
WHEN TEST AT IDLE
The system is showing normal
output from the alternator. No
problem is detected.
LOW CHARGING
WHEN TEST AT IDLE
The alternator is not providing
sufficient current to the battery.
SYSTEM TEST
TEST"
xx.xx V
TURN OFF LOADS
START ENGINE
CRANKING VOLTS
xx.xx V NORMAL
CRANKING VOLTS
xx.xx V LOW
CRANKING
VOLTS
NOT DETECTED
MAKE SURE ALL
LOADS ARE OFF
VOLTS
ALT. IDLE VOLTS
xx.xx V HIGH
ALT. IDLE VOLTS
xx.xx V NORMAL
VOLTS
ALT. IDLE VOLTS
xx.xx V LOW
Check the belts to ensure the alternator is rotating with
engine running. If the belts are slipping or broken, re-
place 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 re-
test. If the belts and connections are in good condition,
replace the alternator.
6. Press «ENTER» for the
charging system with acces-
sory loads.
Turn on the blower to high (heat), high beam headli-
ghts, and rear defogger. Do not use cyclical loads such
as air conditioning or windshield wipers.
7. When testing older model
diesel engines, the users
need to run up the engine to
2500 rpm for 15 secs.
8. Press «ENTER» to read the ripple from the char-
ging system to the battery. One of the three testing
results will be displayed along with the actual tes-
ting measured.
RIPPLE DETECTED NORMAL
Diodes function well in the alter-
nator / starter.
NO RIPPLE DETECT
Ripple is not detected.
EXCESS RIPPLE DETECTED
One or more diodes in the al-
ternator are not functioning or
there is stator damage. Check to ensure the alternator
mounting is sturdy and that the belts are in good shape
and functioning properly. If the mounting and belts are
good, replace the alternator.
9. Press the «ENTER» key to continue the charging
system with accessory loads. One of the three re-
sults will be displayed along with the actual testing
measured.
CHARGING SYSTEM HIGH WHEN TEST WITH AC-
CESSORY LOADS
The voltage output from the al-
ternator to the battery exceeds
the normal limits of a functioning
regulator.
Check to ensure there are no loose connections and
that the ground connection is normal. If there are no
connection issues, replace the regulator. Since most
alternators have the regulator built-in, this will require
you to replace the alternator.
· 10 ·
TURN ON LOADS
PRESS ENTER
RUN ENGINE UP
TO 2500RPM
15 SEC
RIPPLE DETECTED
xx.xx V NORMAL
NO RIPPLE
DETECT
PRESS ENTER
RIPPLE DETECTED
xx.xx V HIGH
ALT. LOAD VOLTS
xx.xx V HIGH