Komatsu 170-3 Series Shop Manual page 145

TROUBLESHOOTING
Causes
170-3 SERIES
1.If the following error codes are displayed, carry out
the troubleshooting in "EA mode" or "EB mode". (If
any of the following error codes is not displayed, they
are not probably the cause of the trouble. In this
case, inspect the other devices for the cause.)
[514][E-73]: Abnormality in fuel rail actuator
[112] [E-83]: Abnormality in timing rail actuator
[318][E-93]: Abnormality in fuel pump actuator
S-1
12-106-1