Failure Code [Ca731] Eng Bkup Speed Sens Phase Error - Komatsu Galeo PC800-8 Shop Manual

SEN00791-02

Failure code [CA731] Eng Bkup Speed Sens Phase Error

Action code Failure code
E15 CA731
Contents of
• There is phase error in engine Bkup speed sensor circuit.
trouble
Action of
• Controls the engine with signal from engine Ne speed sensor.
controller
Problem that
• Engine stops during operations. (When engine Ne speed sensor is also defective)
appears on
• Engine cannot be started while stopping. (When engine Ne speed sensor is also defective)
machine
Related
information
Possible causes
Defective engine Ne speed
and standard 1
sensor system
value in normal
Defective engine Bkup
state
2
speed sensor system
16
Eng Bkup Speed Sens Phase Error
Trouble
(Engine controller system)
Cause
Engine Ne speed sensor may be defective. Carry out troubleshooting
for failure code [CA689].
Engine Bkup speed sensor may be defective. Carry out troubleshooting
for failure code [CA778].
Standard value in normal state/Remarks on troubleshooting
40 Troubleshooting
PC800, 850-8