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1.6 TROUBLESHOOTING
Symptom
Probable Cause Solution Reference
Engine Does Not
Start
(Starter Does Not
Run)
No fuel
Air in the fuel system
Water in the fuel system
Fuel pipe clogged
Fuel filter clogged
Excessively high viscosity fo fuel or engine oil
at low temperature
Fuel with low cetane number
Incorrect injection timing
Injection nozzle clogged
Injection pump malfunctioning
Seizure of crankshaft, camshaft, piston,
cylinder or bearing
Compression leak from cylinder
Improper valve timing
Piston ring and cylinder worn
Excessive valve clearance
Battery discharged
Starter malfunctioning
Key switch malfunctioning
Wiring disconnected
Replenish fuel
Vent Air
Change fuel and
repair or replace fuel
system
Clean
Clean or change
Use specified fuel or
engine oil
Use specified fuel
Adjust
Replace
Replace
Repair or Replace
Replace head
gasket, tighten
cylinder head screw,
glow plug and nozzle
holder
Correct or replace
timing gear
Replace
Adjust
Charge
Repair or replace
Repair or replace
Connect
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1.8.4
1.8.4
1.8.4
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5.1.1
1.8.8
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2.2.4.f
2.3.3.d
1.8.7
6.1
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Engine Revolution
Is Not Smooth
Fuel filter clogged or dirty
Air cleaner clogged or dirty
Fuel leak due to loose injection pipe retaining
nut
Injection pump malfunctioning
Incorrect nozzle injection pressure
Injection nozzle stuck or clogged
Clean or change
Clean or change
T ighten retaining nut
Replace
Replace
Replace
1.8.4
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5.1
5.2.1
5.2.3
Either White or Blue
Exhaust Gas Is
Observed
Excessive engine oil
Piston ring and liner worn or ring stuck
Incorrect Injection timing
Deficient compression
Reduce to specified
level
Repair or replace
Adjust
Check the cylinder
compression
pressure and top
clearance
1.8.1
2.3.3.d
5.1.1
2.1.1
Either Black or Dark
Exhaust Gas Is
Observed
Overload
Low grade fuel used
Fuel filter clogged
Air cleaner clogged
Deficient nozzle injection
Lesson load
Use specified fuel
Clean or change
Clean or change
Replace nozzle
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1.8.8
Deficient Output Incorrect injection timing
Engine’s moving parts seem to be seizing
Injection pump malfunctioning
Deficient nozzle injection
Compression leak
Gas leak from exhaust system
Air cleaner dirty or clogged
Adjust
Repair or replace
Replace
Replace nozzle
Check the
compression
pressure and repair
Repair or replace
Clean or replace
5.1.1
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5.1
5.2.2
2.1.1
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