THIS HAS HAPPENED SEVERAL TIMES AT FREEWAY SPEEDS ON FREEWAYS. THIS ISSUE OCCURS WHEN USING ADAPTIVE CRUISE CONTROL IF THE VEHICLE ENCOUNTERS A PANIC STOP SITUATION AND DETERMINES IT IS UNABLE TO AUTONOMOUSLY STOP IN TIME. WHEN THE COLLISION WARNING ACTIVATES AND THE DRIVER USES THE BRAKES, THE ADAPTIVE CRUISE CONTROL DISENGAGES…
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THIS HAS HAPPENED SEVERAL TIMES AT FREEWAY SPEEDS ON FREEWAYS. THIS ISSUE OCCURS WHEN USING ADAPTIVE CRUISE CONTROL IF THE VEHICLE ENCOUNTERS A PANIC STOP SITUATION AND DETERMINES IT IS UNABLE TO AUTONOMOUSLY STOP IN TIME. WHEN THE COLLISION WARNING ACTIVATES AND THE DRIVER USES THE BRAKES, THE ADAPTIVE CRUISE CONTROL DISENGAGES THE AUTONOMOUS BRAKING AND BRAKING IS REDUCED UNTIL THE BRAKE PEDAL TRAVELS A SIGNIFICANT AMOUNT. THIS INCREASES THE STOPPING DISTANCE AND MAY CAUSE AN ACCIDENT. THE BEHAVIOR OF THE ADAPTIVE CRUISE CONTROL SHOULD BE CHANGED SO THAT A DRIVER APPLYING THE BRAKES DISENGAGES ADAPTIVE CRUISE CONTROL ACCELERATION (IF ACTIVE) BUT DOES NOT DISENGAGE ADAPTIVE CRUISE CONTROL BRAKING (IF ACTIVE). I HAD A 2005 JAGUAR WITH ADAPTIVE CRUISE CONTROL AND IT DID NOT EXHIBIT THIS BEHAVIOR.
NHTSA ODI #11023392
Official recalls
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NHTSA investigations
1
DP22005 · Pedestrian Alert Sounds
Opened Jan 27, 2023 · Closed Aug 7, 2023
Status: closed (inferred from source dates) · Electrical System:propulsion System
NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that have a gross vehicle weight rating of 4,536 KG or less or are defined as low-speed vehicles. The standard became fully applicable to all such vehicles manufactured on or after March 1, 2021.On January 27, 2023, NHTSA opened Defect Petition (DP) 22-005 to evaluate the subject matter described in the petition. On June 24, 2023 and as supplemented on June 25, 2023, the petitioner notified NHTSA he was withdrawing his petition. The petitioner indicated that, based on his review of data, there is no justification for asserting potential benefits that could be derived from actions sought by my petition. Based on the petitioner's withdrawal, DP22-005 is closed. Closure of this DP does not represent a determination by NHTSA regarding the subject matter of the petition.
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