S-100
03-M Series, WSM
DIESEL ENGINE
Magnet Switch Continuity Test
1. Check the continuity across the
C
terminal (1) and the
B
terminal
(2) with a circuit tester, pushing in the plunger.
2. If not continuous or if a certain value is indicated, replace the
magnet switch.
0000010771E
(2) Alternator
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
Q
• Be careful not to touch the rotating engine parts while
engine is running.
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 13.8 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.
0000010745E
(3) Glow Plug
Glow Plug Lead Terminal Voltage
1. Turn the key switch to the “
GLOW
(or
PREHEAT
)” position, and
measure the voltage with a circuit tester between the lead
terminal and the engine body.
2. If the voltage differs from the battery voltage, the wiring harness
or main switch is faulty.
0000010725E
(1)
C
Terminal
(2)
B
Terminal
Regulating voltage at no
load
Factory spec.
13.8 to 14.8 V at 25 °C
(77 °F)
Voltage
Main switch key at
GLOW
(or
PREHEAT
)
Approx. battery voltage
KiSC issued 08, 2012 A
