wsm wg972-e4 Workshop Manual page 115

WG972-E4, WSM
Alternator on Unit Test
(Before testing)
• Before alternator on unit test, check the battery terminal
connections, circuit connection, fan belt tension, charging
indicator lamp, fuses on the circuit, and abnormal noise from the
alternator.
• Prepare full charged battery for the test.
NOTE
• Be careful not to touch the rotating engine parts while
engine is operating.
Keep safety distance from the engine rotating parts.
1. Start the engine.
2. When the engine is operating measure the voltage between two
battery terminals. If the voltage is between 14.2 V and 14.8 V,
the alternator is operating normally.
3. If the results of alternator on unit test are not within the
specifications, disassemble the alternator and check the each
component part for finding out the failure. See the
"DISASSEMBLING AND ASSEMBLING" and "SERVICING" for
alternator.
Regulating voltage at no
Factory specification
load
1-S24
ENGINE
14.2 to 14.8 V
-1
at 5000 min (rpm),
25 °C (77 °F)
9Y1211108ENS0032US0
KiSC issued 07, 2015 A