Mechanical Diagnosis 13-3
TG-VI, μP-IV, μP-V or μP-VI:
Unit switch ON and LCD ON but
engine will not crank
Batteries discharged Replace or lights come recharge battery
Defective Preheat/Start switch Replace switch
Defective starter solenoid Replace solenoid
Corroded battery connections Clean and tighten
Defective starter Repair starter
Water in cylinders Check for hydrostatic lock. Remove glow plugs
(or injectors) and turn engine slowly
Starter motor turns but engine does
not crank
Starter clutch defective Replace
Engine cranks but fails to start Fuel solenoid not energised Check 8D, 8DP circuits and fuel relay;
Check for correct YAN screen setting in
Super Guarded menu of μP-IV, μP-V and μP-VI
controllers
Fuel solenoid valve defective or
stuck
Replace
Injection nozzles defective Repair or replace nozzles
Injection pump defective Replace pump
Engine oil pressure switch open Replace engine oil pressure switch
Glow plugs (or air heater) defective Replace defective glow plugs (or air heater)
No fuel or wrong fuel Fill with proper fuel
Fuel pump defective Replace pump
Air in fuel system Bleed air
Compression low Overhaul engine
Incorrect timing Adjust timing
Air cleaner clogged Replace air filter
Exhaust plugged Clear exhaust system
Defective high pressure cutout Replace high pressure cutout switch
CONDITION POSSIBLE CAUSE REMEDY
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