Komatsu BR380JG-1E0, Shop Manual, Page: 418 / 841

40 Troubleshooting SEN02089-01
BR380JG-1E0
7
Phenomena considered to be failures and troubleshooting Nos.
No. Phenomena considered to be failures
Troubleshooting
Indication
of code
E-mode H-mode S-mode
Phenomena related to user code, error code, or failure code
1 User code is displayed on machine monitor
Accord-
ing to
indicated
code
2
When failure history is checked, error code is displayed in electri-
cal system
3
When failure history is checked, error code is displayed in
mechanical system
Phenomena related to engine
4 Engine does not start easily (It always takes time to start) S-1
5
Engine does
not start
Engine does not crank E-1 S-2 a)
6
Engine cranks but exhaust smoke does not come
out
S-2 b)
7
Exhaust smoke comes out but engine does not
start
S-2 c)
8 Engine speed does not rise sharply S-3
9 Engine stops during operation E-2 H-2 S-4
10 Engine does not rotate smoothly S-5
11 Engine lacks output (or lacks power) H-1 S-6
12 Exhaust gas color is bad (Incomplete combustion) S-7
13 Oil is consumed much or (exhaust gas color is blue) S-8
14 Oil becomes dirty quickly S-9
15 Fuel is consumed much S-10
16
Coolant contains oil (or coolant spurts back or coolant level goes
down)
S-11
17 Oil pressure drops S-12
18 Oil level rises (Water or fuel is mixed in oil) S-13
19 Coolant temperature becomes too high (overheating) S-14
20 Abnormal sound comes out S-15
21 Vibration is excessive S-16
22 Engine does not stop
23 Automatic warm-up function does not work E-3
24 The engine preheater does not operate E-4
Phenomena related to work equipment and travel
25 Speed or power of whole work equipment and travel is low H-1 S-6
26 Engine speed lowers extremely or engine stalls H-2 S-4
27 All work equipment stops suddenly E-5
28 Work equipment and travel systems do not work H-3
29 Abnormal sound comes out from around hydraulic pump H-4
30 Fine control performance or response is low H-5