Lexus Japan has released a video demonstrating the stability control update:
This video was accompanied by a press release which details the exact circumstances that caused the stability control issues discovered by Consumer Reports last week:
The following conditions combine to cause the problem:
- In the GX 460 and Land Cruiser Prado, heavy components, such as the fuel tank, are located on the left side, and in left-hand drive versions, the left side is made even heavier because of the presence of the driver.
- For vehicles with certain tires (on 18-inch wheels) and equipped with the Kinetic Dynamic Suspension System and VSC, the activation of the VSC may not be sufficient in certain circumstances due to the setting of the VSC program.
- Circumstances may require advanced driving skills, such as sharp turns of the steering wheel in high-speed conditions or negotiating a curve to the right at excessive speeds.
All of these circumstances came together to form a “perfect storm”—here’s a screenshot that shows the visible difference in stability:
Considering the complexity and company pressure, Toyota did an excellent job in responding to this issue: sales stoppage, issue verification, issue resolution—all in the course of a week.
The full press release is included after the jump.
TMC Announces Remedy for Vehicle Stability Control in Lexus GX 460 and Toyota Land Cruiser Prado
Toyota City, Japan—Toyota Motor Corporation (TMC) announces its remedy for the problem concerning the Vehicle Stability Control (VSC) program in its Lexus GX 460 and certain Land Cruiser Prado vehicles.
In circumstances in which advanced driving skills are required, such as when a driver of the involved vehicle sharply turns the steering wheel in high-speed conditions, or when the driver negotiates a curve at excessive speeds, the vehicle could slide sideways, due to the insufficient activation of the VSC.
The following conditions combine to cause the problem:
– In the GX 460 and Land Cruiser Prado, heavy components, such as the fuel tank, are located on the left side, and in left-hand drive versions, the left side is made even heavier because of the presence of the driver.
– For vehicles with certain tires (on 18-inch wheels) and equipped with the Kinetic Dynamic Suspension System (KDSS*) and VSC, the activation of the VSC may not be sufficient in certain circumstances due to the setting of the VSC program.
– Circumstances may require advanced driving skills, such as sharp turns of the steering wheel in high-speed conditions or negotiating a curve to the right at excessive speeds.
As a remedy, Toyota will update the VSC program to enhance the effectiveness of the VSC so that the risk of the vehicle sliding, even to the point that it is almost sideways, will be reduced.
Vehicles involved are as follows:
– GX 460: Approx. 13,000 units in total Approx. 9,400 units in the United States, approx. 1,000 units in Russia, approx 1,000 units in Oman
– Land Cruiser Prado: Approx. 21,000 units in total (only left-hand drive vehicles with KDSS and VSC) Approx. 4,400 units in Oman, approx. 4,000 units in Russia, approx. 1,500 units in the United Arab Emirates. No right-hand drive units have this problem.
In total, approximately 34,000 units worldwide are involved. In North America, Toyota Motor Sales, U.S.A., Inc. (TMS) and Toyota Canada Inc. (TCI) each announced a voluntary recall on April 19 (local time). As for other regions and countries involved, such as in Europe and the Middle East, TMC will work to implement similar measures as soon as possible.
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