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Follow the guideline below, when performing any troubleshooting. If you cannot resolve the
problems by this troubleshooting guide, contact our authorized distributor or our engineering
section to request the repair.
Symptom
Presumable Cause
Action
E
ng
ine
do
es
no
t s
tart
Starter motor does not
drive or speed is low
1.
Battery Isolator is OFF
2.
Battery output is weak
3.
Battery is deteriorated
4.
Battery terminal is OFF or loose
5.
Battery terminal is corroded
6.
Power Switch or relay is
defective
7.
Starter motor is defective
8.
ECU (Engine Controller) is
defective
1.
Turn Battery Isolator to ON
2.
Check / battery liquid/ or
Charge
3. Change battery
4. Fix / Tighten terminal
5. Clean terminal
6. Ask our distributor to repair
7. Ask our distributor to repair
8. Ask our distributor to repair
Starter motor drives
but engine does not
start
1. Fuel is insufficient
2. Fuel filter is clogged
3. Gauze filter is clogged
4. Water is interfused in fuel line
5. Air is interfused in fuel line
6. Poor piping connection to
external fuel tank
7. Fuel tank selector lever
(3-way valve) position is
wrong
8. Fuel cut solenoid (motor) does
not work
1. Add fuel
2. Clean / Change fuel filter
3. Clean / Change gauze filter
4. Drain water in water
separator, fuel filter or fuel
tank
5. Extract the air
6. Check piping connection
7. Check lever (3-way valve)
8-1. Check / Change fuse
8-2. Check / Change fuel cut
solenoid
<Ambient temperature
falls down below zero>
1. Fuel is frozen
2. Water in fuel line is frozen
3. Pre-heater is defective
1.
Use winterized fuel
2.
Drain water in fuel line
3.
Ask our distributor to repair
Engine starts but stalls
immediately
1. Fuel filter is clogged
2. Gauze filter is clogged
3. Water is interfused in fuel line
4. Air is interfused in fuel line
5. Poor piping connection to
external fuel tank
6. Air filter element is clogged
7. Lubricant oil is insufficient
1. Clean / Change fuel filter
2. Clean / Change gauze filter
3. Drain water in water
separator, fuel filter or fuel
tank
4. Extract the air
5. Check piping connection
6. Check / Change air filter
element
7. Supply lubricant oil
Engine oil pressure is low
1. Lubricant oil is insufficient
2. Oil filter is clogged
3. Oil Pressure switch is
defective
4. Wrong oil is used
1. Supply lubricant oil
2. Change oil filter
3. Ask our distributor to repair
4. Change to proper kind and
viscosity oil
Summary of Contents for DGA12DM
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Page 49: ...45 13 Generator Circuit Diagram ...
Page 50: ...46 14 Engine Circuit Diagram ...
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Page 52: ... 2021 ...