- GB.11-V1 -
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.
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 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 replace 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.
7.
Following the charging system
at idle, press
«ENTER»
for the
charging system with
accessory loads. Turn on the blower to high (heat),
highbeam headlights, and rear defogger. Do not use
cyclical loads such as air conditioning or windshield
ALT. IDLE VOLTS
××.××V LOW
ALT. IDLE VOLTS
××.××V NORMAL
ALT. IDLE VOLTS
××.××V HIGH
TURN ON LOADS
AND PRESS ENTER
