How To Troubleshoot - Mitsubishi S 12 R User And Maintenance Manual

Chapter 9
TROUBLESHOOTING

How to Troubleshoot

Starters Do Not Crank or Crank Slowly, Resulting in Start Failure
Table 9-1 Starters Do Not Crank or Crank Slowly, Resulting in Start Failure
Problem
Electrical
system
Start
Lubricating
failure
system
Fuel
system
Engine
mechanical
Starters Crank, But Engine Does Not Start
Problem
Fuel
system
Engine
does not
start
Air intake
system
Engine
mechanical
9-2
Cause
Blown fuse
Faulty wire connection between bat-
tery and starter switch
Faulty wire connection between bat-
tery, starters and starter switch
Insufficiently charged battery
Specific gravity of battery fluid too low
Faulty battery
Faulty starter or starter relay
Oil viscosity too high
Air in fuel system
Low fuel level
Clogged fuel filters
Faulty fuel feed pump
Faulty fuel injection pump
Faulty moving parts(Interference
between valves and pistons, or for-
eign items in cylinders)
Table 9-2 Starters Crank, But Engine Does Not Start
Cause
Empty fuel tank
Damaged fuel pipe
Loose fuel pipe connection
Improper fuel
Dust or water mixed in fuel
Clogged fuel filters
Faulty fuel feed pump
Faulty fuel injection pump
Clogged air cleaner
Compression pressure low
(damaged cylinder liner, piston
or piston ring, or faulty valve seat
or nozzle packing seal)
Remedy
Change fuse.
Connect wire correctly.
Connect wire correctly.
Inspect and adjust V-belt tension.
Refer to "Inspection of V-belt and
Adjustment of Belt Tension"
Charge battery.
Install new battery.
Consult a Mitsubishi dealer.
Use appropriate engine oil. Refer to
"Engine Oil" (4-4).
Bleed fuel system.Refer to
tem" (3-1).
Add fuel.
Change fuel filters.
Refer to "Changing Fuel Filters"
Consult a Mitsubishi dealer.
Consult a Mitsubishi dealer.
Consult a Mitsubishi dealer.
Remedy
Add fuel, and bleed fuel system. Refer to
"Fuel System" (3-1).
Consult a Mitsubishi dealer.
Tighten connection. Consult a Mitsubishi
dealer
Use proper fuel. Refer to
Remove dust or water from fuel tank.
Refer to "Cleaning Fuel Tank"
Replace fuel filters. Refer to
Fuel Filters" (6-5).
Consult a Mitsubishi dealer.
Consult a Mitsubishi dealer.
Clean pre-cleaner. Refer to
and Inspecting Air Cleaner Element" (6-
12).
Consult a Mitsubishi dealer.
(6-2).
"Fuel Sys-
(6-5).
"Fuel" (4-2).
(6-4).
"Changing
"Cleaning