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40 Troubleshooting
S-10 Fuel consumption is excessive
General causes why fuel consumption is excessive
Leakage of fuel
q
q
Defective condition of fuel injection (fuel pressure, injection timing)
q
Excessive injection of fuel
Confirm recent repair history
Degree of use of machine
Condition of fuel
consumption
There is external leakage of fuel from engine
Combustion is irregular
Engine oil level rises and oil smells of diesel fuel
When exhaust manifold is touched immediately after starting engine, temperature of some
cylinders is low
Low idle speed is high
Torque converter stall speed or pump relief speed is high
Color of exhaust gas is
Remove head cover and inspect directly
Inspect feed pump oil seal directly
Carry out troubleshooting according to "No-pressure feed by supply pump (*1)" indicated by code
When a cylinder is cut out for reduced cylinder mode operation, engine speed does not change
If spill hose from injector is disconnected, much fuel spills
Carry out troubleshooting according to "Abnormality in coolant temperature sensor (*2)" indicated
by code
Confirm with monitoring function
*1: Displayed failure codes [CA559] and [CA2249]
*2: Displayed failure codes [CA144] and [CA145]
PC130-8
Operated for long period
More than for other machines of same model
Gradually increased
Suddenly increased
Black
White
SEN04125-02
Causes
E E
E
Q
Q
Q
Q Q
w
w
w
w
w
Q Q
Q
q
q
q
q
q
Remedy
1
Q Q Q
Q
Q
Q Q
q
q
q
19
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Troubleshooting
