Midtronics Inc. 7000 Monroe Street Willowbrook, IL 60527
www.midtronics.com
23
Chapter 3: Applications (Apps)
DSS-7000
Charging System Test Results
The Charging System Test results are displayed on screens 2
and 3. Screen 4 displays a summary of the entire System Test.
Tap Print to print the test results or Email to email the results
to the customer. To return to the Home Screen, tap Done.
Test Results - Starter
Decision
Action
NORMAL
The starter voltage is normal and the
battery is fully charged.
LOW VOLTAGE
The starter voltage is low and the battery
is fully charged.
CHARGE
BATTERY
The starter voltage is low and the battery
is discharged. Fully charge the battery
and repeat the starter system test.
REPLACE
BATTERY
(If the battery test result was (REPLACE
or BAD CELL.) The battery must be
replaced before testing the starter.
LOW CRANKING
AMPS
The starter voltage is high but the
cranking amps are low.
NO START
The engine didn’t start and the test was
aborted.
CRANKING
SKIPPED
The tester didn’t detect the vehicle’s
starting profile and skipped the Starter
Test.
Test Results - Alternator
Decision
Action
NORMAL
The output from the alternator is normal.
NO OUTPUT No output detected. Check the belts to ensure
the alternator is rotating with the engine
running.
√
Check all connections to and from the
alternator, especially the connection to
the battery. Clean or replace cable if
necessary and retest.
√
If the belts and connections are in good
working condition, replace the alternator.
(Older vehicles use external voltage
regulators, which may require only
replacement of the voltage regulator.)
LOW
OUTPUT
The alternator is not providing enough current
to power the system’s electrical loads and
charge the battery.
√
Check the belts to ensure the alternator is
rotating with the engine running.
√
Check the connections from the alternator
to the battery. If the connection is loose
or heavily corroded, clean or replace the
cable and retest.
HIGH
OUTPUT
The voltage output from the alternator to
the battery exceeds the normal limits of a
functioning regulator.
√
Check for loose connections and a
normal ground connection. If there are
no connection problems, replace the
regulator.
The normal high limit of a typical automotive
regulator is 14.5 volts +/–0.5. Refer to the
manufacturer specifications for the correct
limit, which may vary by vehicle type.
Diode Decisions
Decision
Action
EXCESSIVE
RIPPLE
One or more diodes in the alternator are not
functioning or there is stator damage, which is
shown by an excessive amount of AC ripple
current supplied to the battery.
√
Make sure 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.
OPEN
PHASE
Replace the alternator.
OPEN
DIODE
SHORTED
DIODE
