Engineering Analysis · Closed
ELECTRONIC STABILITY CONTROL
Manufacturer: Toyota Motor Corporation
This investigation led to a recall
NHTSA links this probe to recall campaign 10V176000.
Read the recall: what is defective and the free fix →What NHTSA is examining
On April 28, 2010, Toyota Motor North America submitted a Defect Information Report (NHTSA Recall No. 10V-176) to NHTSA describing a problem in the Vehicle Stability Control (VSC) system in approximately 50,000 Model Year (MY) 2003 Toyota Sequoia vehicles.According to the report the centering position of the Steering Angle Sensor (SAS) in the MY 2003 vehicles may not be stored correctly due to a logic problem with the Skid Control Computer programming.The VSC system uses the information from the SAS to calculate the driver's intended vehicle direction.This information is cross referenced to sensors that tell the system which direction the vehicle is actually going and the system will, if it determines a variance indicating the vehicle is in a over-steer or under-steer condition, reduce throttle control and apply braking to make a correction in vehicle direction towards what the system believes is the driver's intended path.Toyota dealers will replace the Skid Control Electronic Control Unit in recalled vehicles.Toyota has indicated to NHTSA that it does not believe that inappropriate activations of the VSC system present an unreasonable risk to safety because it believes the activations are rare and tend to occur at low speeds when the vehicle is fully controllable and that the activations do not last more than a few seconds.Based on interviews with complainants ODI believes that the majority of the inappropriate activations of the VSC system occur when turning at low…
Vehicles under investigation
Source: NHTSA Office of Defects Investigation records, updated daily. An investigation is not a determination that a defect exists; many probes close without a recall.