Komatsu PC88MR-10 Shop Manual page 827

No. Cause
Open or short circuit in
5
wiring harness
Open circuit in wiring
harness
6
(Wire breakage or
defective contact of
connector)
Pump controller is
7
defective.
PC88MR-10
Procedure, measuring location, criteria, and remarks
a If no failure is found by check on cause 4, this check is not required.
1. Turn starting switch to OFF position.
2. Remove diode D01.
3. Disconnect connector CP02, and connect T-adapter to each female side.
a Swing lock switch OFF position
Between CP02 (female) (101) and D01 (female) (7)
Resistance
Between D01 (female) (3) and CP02 (female) (115)
a If no failure is found by check on cause 4, this check is not required.
1. Turn starting switch to OFF position.
2. Disconnect connectors D01, CP02, and V03, and connect T-adapters to
each female side.
Between D01 (female) (3) and V03 (female) (1)
Resistance
Between each of CP02 (female) (115), (117), (120)
and V03 (female) (2)
If no failure is found by above checks, pump controller is defective.
(Since this is an internal defect, troubleshooting cannot be performed.)
40 Troubleshooting
Troubleshooting by failure code (Display of code)
Max. 1 z
20 to 60 z
Max. 1 z
Max. 1 z
40-339