Komatsu PC88MR-10 Shop Manual page 624

40 Troubleshooting
Troubleshooting by failure code (Display of code)
No. Cause
Defective engine controller
8
Circuit diagram related to throttle sensor
40-136
Procedure, measuring location, criteria and remarks
If no failure is found by above checks, engine controller is defective.
(Since this is an internal defect, troubleshooting cannot be performed.)
Reference
1. Turn starting switch to OFF position.
2. Insert T-adapter into connector CE03.
3. Turn starting switch to ON position.
4. Operate fuel dial and perform troubleshooting.
Between CE03 (42) and (41) Power supply 4.75 to 5.25 V
Voltage
Between CE03 (51) and (41) Sensor output 0.4 to 4.5 V
PC88MR-10