Komatsu PC88MR-10 Shop Manual page 638

40 Troubleshooting
Troubleshooting by failure code (Display of code)
No. Cause
Defective ambient
6
pressure sensor
Defective engine
7
controller
Circuit diagram related to ambient pressure sensor
40-150
Procedure, measuring location, criteria, and remarks
a If no failure is found by checks on causes 1 to 5 and failure is found by
check on cause 6, sensor is defective.
1. Turn starting switch to OFF position.
2. Insert T-adapters into connector J1 or PAMB.
3. Turn starting switch to ON position.
Between J1 (16) and (59), or between
Voltage
PAMB (3) and (2)
If no failure is found by above checks, engine controller is defective.
(Since this is an internal defect, troubleshooting cannot be performed.)
Sensor
0.3 to 4.7 V
output
PC88MR-10