
6. Press «ENTER» to return to the home screen. Press «ENTER» again to access the main menu.
TEST OF THE ALTERNATOR CHARGING SYSTEM
1. Press «SYSTEM TEST» the following screen appears :
CUT CONS.
START ENGINE
2. Make sure all vehicle consumers are switched o (lights, air conditioning, radio etc.).
3. Start the engine. One of these three results appears :
Examples Screen display Analysis
Voltage below 9.6 V START VOLTS
x.xxx V LOW The starting voltage is not correct. The battery must
be replaced.
Voltage above 9.6 V START VOLTS
x.xxx V NORMAL The starting voltage is normal.
No undulation START VOLTS
NO UNDULATION The starting voltage is not detected.
Repeat the test.
1. If the start voltage is normal, press «ENTER» to continue the test.
2. Keep the engine running Check that all the accessories of the vehicle are o then validate.
3. One of the 3 results is displayed :
• Result of the start voltage test
Examples Results displayed Analysis
High starting voltage when the test is
performed with the engine at idle
ALT. VOLTS ADJUST
xx.xx V UP Check that the connections are good. If every-
thing is properly connected, replace the regulator.
Normal starting voltage when the test
is performed with the engine at idle
ALT. VOLTS ADJUST
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. VOLTS ADJUST
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.
4. Press «ENTER» to continue charging circuit test with accessories.
5. The tester asks «SWITCH CONSUMERS ON AND PRESS ENTER». Turn on the heater to maximum (heat), high and
rear headlights. Do not switch on cyclic loads such as air conditioning or windshield wipers.
6. Run the engine at 2500 rpm for 15 seconds.
7. Press «ENTER», the ripple intensity of the load cell appears. One of the two results is displayed :
Results found Screen display Analysis
Normal undulation intensity
VOLTAGE REDR OK
xx.xx V NORMAL
OR
VOLTAGE REDR DEF
The diodes are working in the alterna-
tor/starter
High undulation intensity TENSION REDR OK
xx.xx V HIGH
One or more diodes do not
do not work or are damaged. Make
sure that the alternator support is
properly positioned and that the timing
belts are working properly. If so, re-
place the alternator.
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DBT 400 EN
Translation of the original instructions
8