TM 5-3805-280-24-1
Diagnostic Information
Boom Up Pressure Switch
Arm In Pressure Sensor
Learning Switch
Operational Function
Senses boom up pilot pressure
Senses arm in pilot pressure signal.
To start engine speed learning
signal.
function.
Control Problems
No electrical signal sent to engine
No electrical signal sent to engine
Engine speed learning function
and pump controller.
and pump controller.
does not operate.
Machine Symptoms
No regenerative function during
HP (high power) mode does not
For an open circuit, engine
boom up and arm in.
function. Arm speed slow when
speed control system operates
normally. Engine speed learning
control cannot be actuated. For a
short circuit, learning control is
actuated when key switch is
turned ON.
Laptop Computer with
--
06 Service Code is displayed
--
Excavator Diagnostic
Software Self-Diagnostic
Functions
Laptop Computer with
Monitor No. 20, Pressure switch.
Monitor No. 5, Arm Roll-In Pilot
Monitor No. 28, Engine learning
Excavator Diagnostic
Pressure.
control.
Software Monitoring
Function
Harness Check
--
--
--
Notes
Switch needed for arm regenerative
Sensor needed for HP mode and
--
operation.
arm regenerative operation.
Description of Operation
See Arm Regenerative Valve
See Arm Regenerative Valve
See Engine Speed Learning
Operation in Group 9025-05.
Operation in Group 9025-05 and HP
Control Circuit Operation in
(High Power) Mode Speed Control
Group 9010-05.
Circuit Operation in Group 9010-05.
9025
15
6
Continued on next page
TX,15,GG2238
1913AUG985/10
6-95
