Troubleshooting - Typical faults
Symptom
JS1-H Steer by Wire Operational Status
Cause/Solution
Operator Notification suddenly becomes active
during normal machine operation.
Joystick is in Safe State.
Machine is still operable but at limited
performance.
Force Feedback may be deactivated.
Turn the machine off and on again.
Button not working
Hardware problem.
Not necessarily detected as dysfunctional circuit.
Joystick needs to be replaced.
Imprecise steering behavior
Mis calibrated Sensors.
Joystick needs to be replaced.
Joystick sporadically activates Operator
Notification after starting the machine.
Joystick is in Safe State.
Machine is still operable but at limited
performance.
Force Feedback may be deactivated.
Turn the machine off and on again.
Joystick always activates Operator Notification
after starting the machine.
Hardware problem identified by power-on self-
test.
Joystick needs to be replaced.
Direction Light always on
Hardware problem.
Joystick needs to be replaced.
Horn always on
Hardware problem.
Joystick needs to be replaced.
GPS-based Auto-Drive always off.
Hardware problem.
Joystick needs to be replaced.
Light is always on high beam.
Hardware problem.
Joystick needs to be replaced.
Terms and abbreviations
Abbreviation
Meaning
AgPL
Agriculture Performance Level (followed by a letter a to e)
B10d
Specifies the number of cycles at which 10% of components have failed dangerously
CFF
Common cause failure
DC
Diagnostic Coverage
EHD
Electro-Hydraulic Dual
EOS
Embedded Operating System
FIT
Fault Insertion Testing
FMEDA
Failure Modes, Effects and Diagnostic Analysis
HFT
Hardware Fault Tolerance
MSK
Modular Safety Kernel
MTTFd
Mean Time to Dangerous Failure
N/A
Not applicable
NC
Not Connected
OPN
Operator Notification
PCBA
Printed Circuit Board Assembly
PFH
Probability of Failure per Hour
PL
Reached Performance Level (followed by a letter a to e)
PVED-CLS
Actuator for the electro-hydraulic steering system from Danfoss
SBW
Steer-by-Wire
SFF
Safe Failure Fraction
SIL
Safety Integrity Level
User and Safety Manual
PLUS+1® JS1-H Steer by Wire
Appendix
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©
Danfoss | December 2022
AX436683569858en-000101
