Pre-Crash Safety System Fail-Safe Chart

Restraints. Lexus Is250, Is220D. Gse20 Ale20
Pre-Crash Safety. Lexus Is250, Is220D. Gse20 Ale20

Pre-Crash Safety System -- Fail-Safe Chart



HINT:
The pre-crash safety fail-safe function and details are indicated in the table below.

Cause
Warning message
Fail-safe Operation
Conditions to return to normal condition
A malfunction exists in part of pre-collision safety system
"CHECK PCS SYSTEM " to "PCS NOT AVAILABLE NOW"
Depending on malfunction part, pre-crash safety seat belt or brake assist system may stop operating*2
Repair malfunctioning part
Radiator grille or millimeter wave radar sensor is dirty
"PCS NOT AVAILABLE NOW"
Depending on dirty part, pre-collision seat belt or brake assist system may stop operating*2
Clean radiator grille or millimeter wave radar sensor
Pre-crash safety sensor cannot detect possible crash object because of bad weather, such as snow
"PCS NOT AVAILABLE NOW"
Depending on dirty part, pre-crash safety seat belt or brake assist system may stop operating*2
Sensor can detect an object
Overheating prevention function of seat belt control ECU operates*1
"PCS NOT AVAILABLE NOW"
Pre-crash safety seat belts
Temperature of seat belt goes down, and seat belt control ECU becomes operative
*1: The overheating prevention function operates when the seat belt control ECU detects a rise in seat belt temperature because of excessive seat belt operation.
*2: The pre-crash safety seat belts operate only with sudden braking.