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11.2.2 Troubleshooting Alternator, Overvoltage
Overvoltage is
detected.
Measure sensing voltage
(190- 277 volts) at controller
fuse block V7 and V8. Is
sensing voltage high?
No
If sensing voltage is
low or correct, check
voltage on all phases.
Is voltage balanced
on all windings?
No
Test stator windings.
See Section 11.7, Stator
Assembly Winding Test.
190 Section 11 Alternator Component Testing and Adjustment
Troubleshoot
Yes
controller with
voltage regulator.
Troubleshoot
Yes
controller with
voltage regulator.
TP-6953
7/19
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