Komatsu PC58UU-3, Руководство по ремонту

Страница: 317 / 528

20-302
PC58UU-3
TROUBLESHOOTING
ACTIONS OF SELF-DIAGNOSIS FUNCTION AND PROBLEMS IN
MACHINE
Displayed
code
Troubled system Contents of trouble
24 Engine speed sensor system
1) Disconnection in wiring harness
2) Defective rotation sensor or improper installation of it
3) Defective controller
31 Boom potentiometer system
1) Disconnection in wiring harness (1 of 3)
2) Short circuit between wiring harnesses (2 of 3)
3) Short circuit with chassis ground in wiring harness
4) Defective potentiometer
5) Defective controller
32 Arm potentiometer system
34 Offset potentiometer system
41 PPC hydraulic lock solenoid system
1) Short circuit of (+) side of solenoid with chassis ground
2) Short circuit in solenoid
3) Contact of (+) side of solenoid with wiring harness on ground side
4) Defective relay R2
5) Defective controller
42 LEFT offset stop solenoid system
1) Short circuit of (+) side of solenoid with chassis ground
2) Disconnection in (+) side of solenoid
3) Short circuit in solenoid
(When internal resistance of solenoid is lowered extremely)
4) Disconnection in solenoid
5) Contact of (+) side of solenoid with wiring harness on ground side
6) Defective controller
48 Traveling accelerator solenoid system
1) Short circuit of (+) side of solenoid with chassis ground
2) Disconnection in (+) side of solenoid
3) Short circuit in solenoid
(When internal resistance of solenoid is lowered extremely)
4) Disconnection in solenoid
5) Contact of (+) side of solenoid with wiring harness on ground side
6) Defective controller
51 Boom RAISE stop EPC solenoid system
1) Disconnection in solenoid
2) Short circuit in solenoid or short circuit of solenoid with chassis ground
3) Disconnection of wiring harness on (+) side of solenoid or short circuit of it with
chassis ground
4) Defective controller
52 Arm IN stop EPC solenoid system
1) Short circuit of (+) side (K24) of solenoid with chassis ground
2) Short circuit in solenoid or short circuit of solenoid with chassis ground
3) Disconnection of wiring harness or short circuit of it with chassis ground
4) Defective controller
54 TVC-EPC solenoid system
1) Disconnection in solenoid
2) Short circuit in solenoid or short circuit of solenoid with chassis ground
3) Disconnection of wiring harness on (+) side of solenoid
4) Defective controller
61 Valve open system
1) Bucket edge entered emergency stop area (actually) or controller recognized
by mistake that bucket edge entered emergency stop area.
2) Defective controller
62 Controller power source
1) When power is not input to controller
2) When source voltage of controller is above 17.68 V or below 8.58 V
3) Defective controller
64 Sensor power source system
1) Short circuit of sensor power source output
2) If sensor power source voltage is above 4.79 V, voltage is above 5.44 V.
3) Defective controller
71 Motor drive relay (accelerator) system
1) Short circuit of (+) side of relay coil with chassis
2) Disconnection in (+) side of relay coil
3) Disconnection in relay coil or short circuit of it
4) Defective controller
E-MODE
(6)