Testing With Electrical Load At 2,000 Rpm - Matco Tools MBT1015 User Manual

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MBT1015 rev-C
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4. Press
Fig.52
5. If either minimum or maximum charging volts are not within the voltage range
limits then it will display one of the screen as below (Fig.49 & 50) and it will
prompt you to check the charging system for the fault.
Results: Low charge
At 3,000 rpm,
No load Test:
Min. >13.3V: 13.2V
Check for loose belt
and the alternator.
[Enter] to Load
6. Just press

Testing with electrical load at 2,000 RPM

As more electrical accessories, such as lights, rear demister, heater, car stereos,
etc. were used; the electro-motive force decreases and this will allow more
amperage from the alternator to flow into the battery to compensate for the added
load. This test is to check the alternator's behavior during loading.
key will show the results of the test (Fig.52):
Results: Good
At 3,000 rpm,
No load Test:
Average Charging
Volts: 14.2V
[Enter] to Load Test.
Fig.53
key if you need to printout the results.
User's Manual Versio18.08
Results:High charge
At 3,000 rpm,
No load Test:
Max. <15.0V: 15.6V
Check alternator
and the regulator.
[Enter] to Load
Fig.54