Yanmar EF-494T - Checkpoints of electrical equipment; Alternator; Instrument panel; Key switch

10 ELECTRIC EQUIPMENT 10 ELECTRIC EQUIPMENT
EF494T TM 06/2011 edition
214
10.2.3 Checkpoints of electrical equipment
2. Alternator
Generator 40A: 119620-77201
The alternator has a built-in IC regulator. The alternating
current produced by the alternator is rectified into direct
current.
1. Do not reverse polarity between the IG and L terminals.
2. Do not make short-circuit between IG and L terminals.
3. Do not remove the battery terminals and the B terminal
when the alternator is running.
Check of alternator coupler without removing B terminal
With removal of IG and L terminal couplers
Instrument panel
Panel assy. Inst.: 1A7780-56502
When the key switch is turned to ON, charge lamp (1) turns
on. Turning the key switch further to SATRT, the engine
runs and the charge lamp turns off after a while.
(1) Charge lamp
6. Key switch
See. ■ Electric equipment 10.1.1 “12. Key switch”..
Range
Measuring point
Status
Result
Tester probe
+
Tester probe
-
DCV
B
Chassis
grounding
Starter
switch
"OFF"
Approx. 12 V
Range
Measuring point
Status
Result
Tester probe
+
Tester probe
-
DCV
[1]
Chassis
grounding
Starter
switch "ON"
Approx. 12 V
DCV
[2]
Chassis
grounding
Starter
switch "ON"
Approx. 12 V
Wire side coupler
B terminal
IG and L
terminal