Lexus LS460 Owners Book page 181

When there is a malfunction in the system
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Warning lights and/or warning messages will turn on or flash. (P. 707, 717)
Depending on the condition, the parking brake indicator light may flash.
Usage in winter time
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See "Winter driving tips" for parking brake usage in winter time. (P. 308)
NOTICE
When parking the vehicle
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Before you leave the vehicle, set the parking brake, shift the shift lever to "P" and
make sure that the vehicle does not move.
When the system malfunctions
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Stop the vehicle in a safe place and check the warning messages.
When the parking brake cannot be released due to a malfunction
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Use the parking brake release tool to manually release the parking brake.
(P. 731)
Driving the vehicle with the parking brake set will lead to brake components over-
heating, which may affect braking performance and increase brake wear.
2-1. Driving procedures
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