Komatsu PC88MR-10 Shop Manual page 748

40 Troubleshooting
Troubleshooting by failure code (Display of code)
No. Cause
Ground fault in wiring
harness
6
(Contact with ground
circuit)
Pump controller is
7
defective.
Circuit diagram related to solenoid power supply
40-260
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. Turn the battery disconnect switch to OFF position.
3. Remove wire from terminal R03.
4. Disconnect connectors F02 and CP02, and connect T-adapters to female
side of CP02 and male side of F02.
Between ground and CP02 (female)(116), (118),
(121), or F04 (male) (2)
Resistance
Between ground and F02 (male) (1) or terminal
R03 (M)
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
PC88MR-10