TROUBLESHOOTING
III
-+
BATTERY
t
I
Run-down battery
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I
TEST 1
With the engine at curb idle, measure the voltage at the “B”,terminal
of the alternator. Next, measure the voltage at the “B” terminal
when the engine speed is increased to about 2,000 rpm, and compare that
1 measurement with the measurement during idling.
1 Is voltage higher at 2,000 rpm?
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I
I
$
Go to TEST 6.
1
TEST 2
With the engine stopped and the ignition switch in the “ON” position, measure
the voltage at the “L” terminal of the alternator. In other words, check whether
or not field current flows.
1
I
Go to TEST 6. ~~
t0
TEST 5.
TEST 3
Short-circuit the “B” terminal and the “R” terminal of the alternator with a
jumper wire, and then repeat TEST 2.
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oto1v
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1 to3V
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Poor ignition
switch ground
1
TEST 4
Remove the connector from the alternator, and then check for continuity
between the “L” and “R” terminals of the alternator.
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Continuity (35 to 100 52)
No continuity
Malfunction of the regulator,
or (t) side brush is grounded
Malfunction of the regulator
CAUTION
While engine is running (alternator generating power), make sure that
Lterminal is not grounded. If Ltenninal is grounded, auxiliary diode
will be short-circuited and no voltage will be available at Lterminal, so
no power will be generated. Therefore, CHARGE lamp will remain lit.
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