BarrSlides_FINAL_SCRUBBED.pdf?utm_content=bufferb9206&utm_medium=social&utm_source=twitter

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AGAIN: FAILED TO REVIEW MONITOR CPU!The critical “monitor CPU” that checks the main CPUhas never been independently reviewed! Toyota doesn’t even have a copy of the source code! NASA didn’t review that critical system component eitherESP-B2 source code was not provided to NASA!?Barr Group has reviewed Denso’s ESP-B2 source code! Monitor CPU for 2005-2009 Camry L4 (and some other models)44Barr Chapter RegardingToyota’s Monitor CPU
MONITOR CPU IS LAST LINE OF UA DEFENSEBut ESP-B2 monitor CPU could have included a proper UA defense:! IF (driver is braking & throttle is not closing) THEN reset ECMSomething is not right with the main CPU when that happens!Resets of main CPU barely noticeable at speed (brief rpm drop)! CRITICAL to ending UA in vehicles with potential vacuum lossPer car cost to add this safety feature is $0.00 (it’s just bits)! There was enough memory and CPU bandwidth for these instructions! All of the required electrical inputs and outputs were already present! In line with E-Gas Level 3 recommendations45Barr Chapter RegardingToyota’s Monitor CPU
Page 3 and 4: BOOKS BY MICHAEL BARR1ed: 1999; 2ed
Page 5 and 6: MY REVIEW OF TOYOTA’S SOURCE CODE
Page 7 and 8: ELECTRONIC THROTTLE CONTROLfdadg7
Page 9 and 10: SAFETY-CRITICAL SYSTEMSNot all embe
Page 11 and 12: SUMMARY OF 2005 CAMRY L4 CONCLUSION
Page 13 and 14: NASA DID NOT RULE OUT UA BY SOFTWAR
Page 15 and 16: 15ETCS SOFTWARE MALFUNCTION
Page 17 and 18: TOYOTA’S OPERATING SYSTEM (OSEK)1
Page 19 and 20: MEMORY CORRUPTION AND TASK DEATH0Bi
Page 21 and 22: SOFTWARE CAUSES OF MEMORY CORRUPTIO
Page 23 and 24: TOYOTA’S SPAGHETTI CODETOY-MDL049
Page 25 and 26: STACK ANALYSIS FOR 2005 CAMRY L4OSE
Page 27 and 28: TOYOTA’S MAJOR STACK MISTAKESToyo
Page 29 and 30: TOYOTA FAILED TO COMPLY WITH STANDA
Page 31 and 32: TOYOTA FAILED TO COMPLY WITH STANDA
Page 33 and 34: NASA’S SOFTWARE AREAS OF CONCERNN
Page 35 and 36: LAYER 1: MIRRORING OF CRITICAL VARI
Page 37 and 38: UA VIA MEMORY CORRUPTIONTask X deat
Page 39 and 40: LAYER 2: DTCs AND FAIL-SAFE MODESNA
Page 41 and 42: TOYOTA’S DEFECTIVE WATCHDOG DESIG
Page 43: TOYOTA FAILED TO REVIEW MONITOR CPU
Page 47 and 48: TOYOTA’S INADEQUATE SOFTWARE PROC
Page 49 and 50: NASA SOUGHT WHAT BARR GROUP FOUND
Page 51 and 52: INDIVIDUAL TASK DEATH OUTCOMES(Watc
Page 53 and 54: UA FOREVER IF BRAKE ON AT TASK DEAT
Page 55 and 56: OTHER SIMILAR INCIDENT CRITERIAVehi
Page 57: TOYOTA’S EXPERT HAS NOT REBUTTEDM

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