Komatsu PC88MR-10 Shop Manual page 688

40 Troubleshooting
Troubleshooting by failure code (Display of code)
No. Cause
Short circuit in wiring
5
harness
Defective engine
6
controller
Circuit diagram related to intake air temperature sensor
40-200
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
2. Disconnect connectors J1 and P55 and connect T-adapter to female side
of connector J1.
a Check by using multimeter in continuity mode.
Between J1 (female) (6) and each pin other than
Resistance
pin (6)
If no failure is found by above checks, engine controller is defective.
(Since this is an internal defect, troubleshooting cannot be performed.)
Min. 1 Mz
PC88MR-10