EA3-x NTC 0x0AB(0) LOA Controlled Shutdown
NTC Overview
NTC 0x0AB.0 LOA Controlled Shutdown
Description:
SF049A Loss of Assist Manager tries to avoid system shutdown when safe sensor redundancy is still in tact. However, in the event that conditions do not allow continued operation, it is LoaMgr’s responsibility to request system shutdown.
Diagnostic Overview:
LoaMgr includes many calibrations used to determine correct system response. Some of them can be given values to intentionally trigger this fault. LoaMgr reacts instantly because all debounce operations are assumed to happen in outside functions that feed intputs to LoaMgr.
Typical Fault Response: F3 Notification Only
The diagnostic is set to an F2. The fault is intended to produce shutdown of the system and apply damping to control handwheel kick.
Probable Sources (Most to Least Probable):
•One of LoaMgr’s “Independent Signals” inputs has a runtime value that matches up with one of the “Response” calibrations whose cal value is set to 4.
• One of LoaMgr’s “Independent Signals” inputs is receiving an initial value has a value that matches up with one of the “Response” calibrations whose cal value is set to 4.
Initialization | |
Periodic | |
Event | X |
Date | Revision | Initials |
3/27/2015 | Initial Release | Kevin Derry |
Description of Unusual Event setting NTC | Root Cause / Explanation |
Date | FDD & Rev | Modifications to Diagnostic Function |
3/27/2015 | SF049A v1.0.0 | Initial Implementation |
Algorithm Changes / Lessons Learned / Revision Log