TROUBLESHOOTING
n
TEST 6
Output current test
Disconnect the wiring from the “B” terminal of the alternator, and
connect an ammeter (60 A or higher) between the wires and the terminal.
Start the engine. Then immediately increase the engine speed to 2,500 to 3,000
rpm and quickly read the maximum value shown by the ammeter. Note that
all loads on the electrical system should be “ON” when this test is made.
70% or less of nominal
output
I
70% to 90% of nominal
output
90% or more of nominal
output
Normal function of alternator Alternator is normal
1 TEST 7
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Output current test (recheck)
Check for poor contact of the wiring between the “B”
terminal of the alternator and the positive (+) terminal of the battery.
After slightly discharging the battery make TEST 6 once again.
I I
Less than 90% of nominal
More than 90% of nominal
output
output
Remove the alternator from
the engine and check it.
1
Alternator is normal
NOTE
Make TEST 8 if it is necessary after finishing TESTS 6 and 7.
1 TEST8
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Regulated voltage test
(See p.8-76.)
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I
Electronic voltage regulator
is normal
I
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Malfunction of alternator
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8-19
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