Komatsu PC88MR-10 Shop Manual page 618

40 Troubleshooting
Troubleshooting by failure code (Display of code)
No. Cause
Open circuit in wiring
harness
6
(wire breakage or
defective contact of
connector)
Defective engine
7
controller
*: Refer to "Troubleshooting method for open circuit in wiring harness of pressure sensor system" of "General
information on troubleshooting".
Circuit diagram related to charge pressure sensor
40-130
Procedure, measuring location, criteria, and remarks
If no failure is found by above checks, wiring harness probably has open
circuit. (*)
a To check open circuit in GND line
If no failure is found by above checks, engine controller is defective.
(Since this is an internal defect, troubleshooting cannot be performed.)
PC88MR-10