Dynamic Radar Cruise Control System Fail-Safe Chart

Cruise Control System. Lexus Gs430, Gs300. Uzs190 Grs190
Cruise Control. Lexus Gs430, Gs300. Uzs190 Grs190

  1. Constant speed control mode and vehicle-to-vehicle distance control mode:

  1. Vehicle-to-vehicle distance control mode:

  1. Vehicle-to-vehicle distance control mode:

  1. Constant speed control mode and vehicle-to-vehicle distance control mode:

Dynamic Radar Cruise Control System -- Fail-Safe Chart



Constant speed control mode and vehicle-to-vehicle distance control mode:
If the following conditions are detected while the dynamic radar cruise control system is in operation, the system clears the stored vehicle speed in the ECM and cancels the dynamic radar cruise control operation.
Lexus Gs430, Gs300. Uzs190 Grs190.Cruise Control.Cruise Control System.Dynamic Radar Cruise Control System Fail-Safe Chart

Vehicle Condition
Auto Cancel Condition
Fail-safe Deactivation Condition
  1. CRUISE main indicator light blinks
  2. Master warning light comes on
  3. "Check Cruise System" is displayed
  4. "Pong" warning sound is heard
  1. Open or short in stop light switch circuit
  2. Problem with vehicle speed signal
  3. Problem with throttle position sensor and motor
Turn cruise control main switch ON again

Vehicle-to-vehicle distance control mode:
If the following conditions are detected while the dynamic radar cruise control system is in operation, the system clears the stored vehicle speed in the ECM and cancels the dynamic radar cruise control operation.
Lexus Gs430, Gs300. Uzs190 Grs190.Cruise Control.Cruise Control System.Dynamic Radar Cruise Control System Fail-Safe Chart

Vehicle Condition
Auto Cancel Condition
Fail-safe Deactivation Condition
  1. CRUISE main indicator light blinks
  2. Master warning light comes on
  3. "Check Cruise System" is displayed
  4. "Pong" warning sound is heard
  1. There is problem with millimeter wave radar sensor
  2. Beam axis of millimeter wave radar sensor deviates
Turn cruise control main switch ON again

Vehicle-to-vehicle distance control mode:
If the following conditions are detected while the dynamic radar cruise control system is in operation, the system maintains the stored vehicle speed in the ECM and cancels the dynamic radar cruise control operation.
Lexus Gs430, Gs300. Uzs190 Grs190.Cruise Control.Cruise Control System.Dynamic Radar Cruise Control System Fail-Safe Chart

Vehicle Condition
Auto Cancel Condition
Fail-safe Deactivation Condition
  1. Master warning light comes on
  2. "Clean Radar Sensor" is displayed
  3. "Pong" warning sounds is heard
There is dirt on millimeter wave radar sensor.
Recover from condition on left (RESUME operation is possible after recovery.)
  1. Master warning light comes on
  2. "Cruise not Available" is displayed
  3. "Pong" warning sound is heard
  1. Wiper switch is in HI position
  2. ECT-SNOW switch is ON
  3. Millimeter wave radar sensor is least sensitive because of bad weather such as rain, fog, snow and sandstorms
  1. Recover from condition on left (RESUME operation is possible after recovery)
  2. Turn cruise control main switch ON again

Constant speed control mode and vehicle-to-vehicle distance control mode:
If the following conditions are detected while the dynamic radar cruise control system is in operation, the system clears the stored vehicle speed and cancels the dynamic radar cruise control operation.
HINT:
In the vehicle-to-vehicle distance control mode, the stored vehicle speed in the ECM is maintained.

Vehicle Condition
Auto Cancel Condition
Fail-safe Deactivation Condition
CRUISE main indicator light goes off
  1. Vehicle speed is lower than low speed limit (approx. 40 km/h (25 mph)) while running with cruise control system in operation
  2. Vehicle speed is lower than stored vehicle speed by 16 km/h (9.9 mph) or more while running with cruise control system in operation
  1. Turn cruise control main switch ON again*1
  2. Push the cruise control main switch to RESUME/ACCEL*2
HINT:
*1: Constant speed control mode
*2: Vehicle-to-vehicle distance control mode