Magneti Marelli 007950006900 Owner's Manual page 15

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 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.
6. Press «ENTER» for the charging system with
accessory loads. Turn on the blower to high
(heat), high beam headlights, 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 charging system to the battery.
One of the three testing results will be displayed along with the actual testing
measured.
RIPPLE DETECTED NORMAL
Diodes function well in the alternator / starter.
NO RIPPLE DETECT
Ripple is not detected.
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ALT. IDLE VOLTS
xx.xx V LOW
TURN ON LOADS
PRESS ENTER
RUN ENGINE UP
TO 2500RPM 15
DETECTED
xx.xx V NORMAL
NO RIPPLE DETECT
PRESS ENTER
15
SEC
RIPPLE