ENGINE
M6060, M7060, WSM
1-S1
1. TROUBLESHOOTING
This "TROUBLESHOOTING" shows only mechanical failures. The failures related to the common rail system
(CRS), refer to the diagnosis manual (DM) for common rail system engine (9Y120-02440).
Symptom Probable Cause Solution
Reference
Page
The engine does not
start
No fuel Fill up the fuel –
Air in the fuel system Bleed the air G-44
Water in the fuel system Change the fuel and
repair or replace the
fuel system
G-29
The fuel pump is damaged Replace –
The fuel hose is clogged Clean or replace G-29
The fuel filter is clogged Replace G-35
The viscosity of fuel at low temperature is too
high
Replace the specified
fuel
G-14
The cetane number of fuel is low Replace the specified
fuel
G-14
Fuel leakage because of loose injection pipe
retaining nut
Tighten the retaining
nut
1-S32
The injector is clogged Replace 1-S35
The supply pump is damaged Replace 1-S41
Seizure of the crankshaft, camshaft, piston or
bearing
Repair or replace –
Compression leakage from the cylinder Replace the head
gasket
Tighten the cylinder
head screw
1-S38,
1-S39
Incorrect valve timing Examine the timing
gear
1-S50
Piston ring and cylinder are worn out Replace 1-S53,
1-S69,
1-S70,
1-S76
Incorrect valve clearance Adjust valve
clearance
1-S12
The starter does not
operate
Discharged battery Charge or replace 8-S9
Starter is damaged Repair or replace 8-S17,
8-S56,
8-S59
The key switch is damaged Replace –
The connection of the wires is incorrect Examine or correct –
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