• Result of the start voltage test
Result Results displayed Analysis
High starting voltage when the test is
performed with the engine at idle ALT. IDLE VOLTS
xx.xx V HIGH Check that the connections are good. If everything
is properly connected, replace the regulator.
Normal starting voltage when the test
is performed with the engine at idle ALT. IDLE VOLTS
xx.xx V NORMAL No problem detected. Normal operation of the
alternator.
Low starting voltage when the test is
performed with the engine at idle ALT. IDLE VOLTS
xx.xx V LOW
The alternator does not provide enough power to
the battery. Check the belts, and ensure that the
alternator is running when the engine is on. If the
belts slip or are broken, replace them and re-test.
Check the connection between the alternator and
the battery. If the connection is bad, clean or
replace the cable and re-test. If the alternator belts
and connection are in good condition, replace the
alternator.
5. The tester will prompt to «TURN ON CONSUMERS AND PRESS ENTER». Turn on the heater to maximum (heat), full
beam lights and rear headlights. Do not switch on cyclic loads such as air conditioning or windscreen wipers.
6. When the test is done, run the engine at 2500 rpm for 15 seconds.
7. Press «ENTER», the undulation of the charging system is visible. One of the three test results is displayed:
Result Results displayed Analysis
Normal undulation detected RIPPLE DETECTED
xx.xx V NORMAL
The diodes are working in the alternator/starter
No undulation detected NO RIPPLE DETECT
PRESSEZ ENTER
No undulation detected Alternator malfunction.
Replace it.
High undulation intensity RIPPLE DETECTED
xx.xx V HIGH
One or more diodes are not working or are da-
maged. Make sure that the alternator support is
properly positioned and that the timing belts are
working properly. If so, replace the alternator.
8. Press «ENTER» to continue the charging system test with the consumers running (lights, heating ...).
• Charging system test result with consumers running
Examples Results displayed Analysis
High starting voltage when the test is
carried out with consumers in operation ALT. LOAD VOLTS
xx.xx V HIGH
The alternator output voltage is abnormally high.
Check that there are no connection problems. If
not, replace the alternator.
Normal starting voltage when the test
is performed with the consumers in
operation
ALT. LOAD VOLTS
xx.xx V NORMAL The alternator output voltage is normal. No
problems are detected.
Low starting voltage when the test
is performed with the consumers in
operation
ALT. LOAD VOLTS
xx.xx V LOW
The alternator does not provide enough current
for charging the electrical system and the battery.
Check the alternator belts, and make sure the
alternator is running when the engine is running.
If the timing belts slip or are broken, replace the
timing belts and re-test. Check the connection
between the alternator and the battery. If the
connection is bad, clean or replace the cable and
re-test. If the belts and connection are in good
condition, replace the alternator.
9. Press «ENTER» when the system test is complete. Turn o all consumers (heating, lights, etc.). Press «ENTER» to
obtain the test results. Use the buttons to read the complete results.
10
DBT 350 EN
Translation of the original instructions
