Komatsu PC88MR-10 Shop Manual page 908

40 Troubleshooting
Troubleshooting of electrical system (E-mode)
No. Cause
Ground fault in wiring
harness
8
(Contact with ground
circuit)
Pump controller is
9
defective.
Circuit diagram related to PPC lock solenoid
40-420
Procedure, measuring location, criteria, and remarks
a If no failure is found by check on Cause 1, this check is not required.
1. Turn starting switch to OFF position.
2. Remove fuse No. 3.
3. Disconnect connectors S14, D01, V01, and R12, and then connect T-
adapter to male side of S14 or female side of V01.
Between ground and V01 (female) (1) or R12
(female) (5)
Between ground and R12 (female) (3) or S14
Resistance
(male) (2)
Between S14 (male) (1) and ground
If no failure is found by above checks, pump controller is defective.
(Since this is an internal defect, troubleshooting cannot be performed.)
Min. 1 Mz
Min. 1 Mz
Min. 1 Mz
PC88MR-10