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WSM U15-3
5) Check battery voltage at B-terminal of wireharness coupler.
If no battery voltage, check the fuse and continuity of wireharness.
6) Alternator B-terminal check
1)Measure the voltage between the alternator's termi-
nal B and the body ground. Make sure the measure-
ment is 12 V or so. If the measured voltage is lower
than this, it means that the battery capacity may be
low or that the wire connections before the alternator
may be loose.
2)Next start the engine and measure the voltage being
generated while the alternator is running. For this,
measure the voltage between the alternator's termi-
nal B and the body ground. Make sure the measure-
ment goes up to 14 V or so (alternator-generated
voltage). If the measurement is still the battery volt-
age (12 V or so), it means that the alternator or the
regulator may be in trouble.
7) P-terminal check
P-terminal signal indicates the alternator speed.
This pulse signal is sent to the auto release controller terminal (CN-310-1) to detect the engine rotating
condition.
Alternator assembly
II-170
IC regulator
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