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Home >> Lexus >> 2011 >> GS 450h >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Dynamic Radar Cruise Control System (Diagnostics - Introduction) >> Dynamic Radar Cruise Control System >> Road Test >> Road Test
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Road Test

HINT: 

The dynamic radar cruise control system has 2 cruise control modes: the constant speed control mode and vehicle-to-vehicle distance control mode.

  1. INSPECT SET SWITCH 
    Fig 1: Inspecting SET Function
    GTY103539Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Turn the cruise control main switch on.
    2. Drive at a speed of between 45 and 140 km/h (27 and 87 mph).
    3. Press the cruise control main switch to SET / COAST.
    4. Check that the vehicle cruises at the desired speed.
  2. INSPECT "+" SWITCH 
    Fig 2: Checking Cruise Control Switch Functions
    GTY108148Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Turn the cruise control main switch on.
    2. Drive at a speed of between 45 and 140 km/h (27 and 87 mph).
    3. Press the cruise control main switch to SET / COAST.
    4. Check that vehicle speed increases while the cruise control main switch is pushed to RES / ACC, and that the vehicle cruises at the set speed when the switch is released.
    5. Constant speed control mode:

      Momentarily press the control switch to SET / COAST, and then immediately release it. Check that the vehicle speed decreases by about 1.6 km/h (1 mph) (Tap-down function).

  3. INSPECT "-" SWITCH 
    Fig 3: Inspecting SET Function
    GTY103539Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Turn the cruise control main switch on.
    2. Drive at a speed of between 45 and 140 km/h (27 and 87 mph).
    3. Press the cruise control main switch to SET / COAST.
    4. Check that vehicle speed decreases while the cruise control main switch is pressed to SET / COAST, and the vehicle cruises at the set speed when the switch is released.
    5. Constant speed control mode:

      Momentarily press the control switch to SET / COAST, and then immediately release it. Check that the vehicle speed decreases by about 1.6 km/h (1 mph) (Tap-down function).

  4. INSPECT CANCEL SWITCH 
    Fig 4: Inspecting CANCEL Function
    GTY103545Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Turn the cruise control main switch on.
    2. Drive at a speed of between 45 and 140 km/h (27 and 87 mph).
    3. Press the cruise control main switch to SET / COAST.
    4. When operating one of the following, check that the cruise control system is canceled.
      • Depressing the brake pedal
      • Moving the shift lever to any position except D (6th, 5th and 4th gears)
      • Turning the cruise control main switch off
      • Pulling the cruise control main switch to CANCEL
  5. INSPECT RES (RESUME) SWITCH 
    Fig 5: Checking Cruise Control Switch Functions
    GTY108148Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Turn the cruise control main switch on.
    2. Drive at a speed of between 45 and 140 km/h (27 and 87 mph).
    3. Press the cruise control main switch to SET / COAST.
    4. Cancel the cruise control system by performing any of the operations below.
      • Depressing the brake pedal
      • Moving the shift lever to any position except D (6th, 5th and 4th gears)
      • Pulling the cruise control main switch to CANCEL
    5. After the cruise control main switch is pressed to RES / ACC at a driving speed of more than 40 km/h (25 mph), check that the vehicle restores the speed before the cancellation.

      HINT: 

      RESUME function in vehicle-to-vehicle distance control mode only: The stored vehicle speed is retained even if the vehicle speed goes below 40 km/h (25 mph) once. The previously stored vehicle speed can be resumed by pushing the cruise control main switch to RES / ACC when the vehicle speed returned to approximately 40 km/h (25 mph) or more.