40 Troubleshooting SEN00458-01
114E-3 Series
17
S-10 Fuel consumption is excessive 1
*1: Code [559/CA559] and code [2249/CA2249] in E-mode
*2: Code [144/CA144] and code [145/CA145] in E-mode
General causes why fuel consumption is excessive
q Leakage of fuel
q Defective condition of fuel injection (fuel pressure, injection timing)
q Excessive injection of fuel
Causes
Fuel leakage inside head cover
Fuel leakage from fuel filter, piping, etc.
Defective feed pump oil seal
Defective supply pump plunger
Defective common rail pressure
Defective spray by injector
Defective operation of injector
Defective coolant temperature sensor, wiring harness
Questions
Confirm recent repair history
Degree of use of machine Operated for long period EE E
Condition of fuel consumption
More than for other machines of same model QQQ
Gradually increased QQ
Suddenly increased QQ
There is external leakage of fuel from engine w
Combustion is irregular w
Engine oil level rises and oil smells of diesel fuel ww
Check items
When exhaust manifold is touched immediately after starting engine, temperature of some
cylinders is low
w
Low idle speed is high Q
Torque converter stall speed or pump relief speed is high Q
Exhaust smoke color
Black QQ Q
White Q
Troubleshooting
Remove head cover and inspect inside directly q
Inspect feed pump oil seal directly q
Carry out troubleshooting according to “No-pressure feed by supply pump (*1)” in E-mode q
When a cylinder is cut out for reduced cylinder mode operation, engine speed does not
change
q
If spill hose from injector is disconnected, much fuel spills q
Carry out troubleshooting according to “Abnormality in coolant temperature sensor (*2)” in
E-mode
q
Confirm with INSITE or with monitoring function on applicable machine side q
Remedy
Correct
Correct
Replace
Replace
Correct
Replace
Replace
Replace
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