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Nexteer Confidential

LOA Controlled Shutdown Overview
NTC 0x0AB.0

FDD: SF049A

Description:

SF049A Loss of Assist Manager(LoaMgr) 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:  

1. • –LOA Based Systems 

1. • • •Response for this diagnostic is F2.
        

Probable Sources (Most to Least Probable):

1. • –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.