Sakai SV540 Series, Shop Manual

Page: 243 / 306

9-035
TROUBLESHOOTING
2-4-3. No charging
Reference Fig.: 2-4-1
Check point Check/Cause Action
1. Alternator After starting engine, measure voltage between alternator
terminal BATTERY wire and chassis ground.
Standard voltage : At least intermediate engine speed,
27 to 29 V or more
If voltage is lower than standard, alternator is faulty.
If voltage is normal and battery is not charged, battery is
faulty.
•
•
•
Replace alternator or
battery.
2-4-4. Grid heater does not work (Engine starting performance is bad in cold weather)
Reference Fig. : 2-4-1
Check point Check/Cause Action
1. Grid Heater when starter switch is ON, measure voltage between grid
heater inlet wire WR and chassis ground.
Standard voltage : 24 V or more
If voltage is normal, grid heater is faulty.
•
•
Replace grid heater.
2. Grid Heater Relay
(1) when starter switch is ON, measure voltage between
grid heater relay terminal 2 inlet wire GB and chassis
ground.
Standard voltage : 24 V or more
(2) when starter switch is ON, measure voltage between
grid heater relay terminal 3 inlet wire L and chassis
ground.
Standard voltage : 24 V or more
(3) when starter switch is ON, measure voltage between
grid heater relay terminal 5 outlet wire WR and chassis
ground.
Standard voltage : 24 V or more
If above items (1) and (2) are OK and item (3) is NG, grid
heater relay is faulty.
•
Replace grid heater
relay.
3. Harness Connecting
Between Terminals
Measure resistance of harness connecting between
terminals.
Standard resistance : 10 Ω or less
If resistance is abnormal, harness is faulty.
(NOTICE)
If any abnormality is found in shielded twisted wires,
repair is not approved. Be sure to replace them.
•
•
•
Repair or replace
harness.