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Road Test

WARNING: This page is about a different car, the 2009 Lexus IS 350 and 2009 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
  1. PROBLEM SYMPTOM CONFIRMATION 

    HINT: 

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

    • The vehicle-to-vehicle distance control mode is always selected when starting up the dynamic radar cruise control system.
    • Operation of the constant speed control mode is the same as that for a conventional cruise control system.
    1. Inspect the SET function.
      Fig 1: Checking Cruise Control Switch Functions
      GTY140007Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Turn the main switch on.
      2. Drive at the required speed (43 km/h (27 mph) or higher).
      3. Push the cruise control main switch to - (COAST)/SET.
      4. After releasing the switch, check that the vehicle cruises at the set speed.
    2. Inspect the ACCELERATION function.
      Fig 2: Checking Cruise Control Switch Functions
      GTY139857Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Turn the main switch on.
      2. Drive at the required speed (43 km/h (27 mph) or higher).
      3. Push the cruise control main switch to - (COAST)/SET.
      4. Check that vehicle speed increases while the cruise control main switch is pushed to + (ACCEL)/RES (RESUME), and that the vehicle cruises at the newly set speed when the switch is released.
      5. Push the cruise control main switch to + (ACCEL)/RES (RESUME) and then release it immediately. Check that vehicle speed increases* (tap-up control).

        HINT: 

        *: Constant speed control mode: increases by 1.6 km/h (1 mph); vehicle-to-vehicle distance control mode: increases by 5 km/h (3 mph)

    3. Inspect the - (COAST) function.
      Fig 3: Checking Cruise Control Switch Functions
      GTY140007Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Turn the main switch on.
      2. Drive at the required speed (43 km/h (27 mph) or higher).
      3. Push the cruise control main switch to - (COAST)/SET.
      4. Check that vehicle speed decreases while the cruise control main switch is pushed to - (COAST)/SET, and the vehicle cruises at the newly set speed when the switch is released.
      5. Push the cruise control main switch to - (COAST)/SET, and then release it immediately. Check that vehicle speed decreases* (tap-down control).

        HINT: 

        *: Constant speed control mode: decreases by 1.6 km/h (1 mph); vehicle-to-vehicle distance control mode: decreases by 5 km/h (3 mph).

    4. Inspect the CANCEL function.
      Fig 4: Inspecting CANCEL Function
      GTY103545Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Turn the main switch on.
      2. Drive at the required speed (43 km/h (27 mph) or higher).
      3. Push the cruise control main switch to - (COAST)/SET.
      4. When performing any one of the following, check that the cruise control system is canceled and that the normal driving mode is reset.
        • Depressing the brake pedal
        • The shift lever is moved from the D to the N position or the transmission is shifted to the 3rd, 2nd, or 1st gear with the shift lever in the S position
        • The transmission is shifted to the 3rd, 2nd, or 1st gear with the shift paddle switch.
        • Turning the main switch off
        • Pulling the cruise control main switch to CANCEL
    5. Inspect the RES (RESUME) function.
      Fig 5: Checking Cruise Control Switch Functions
      GTY139857Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Turn the main switch on.
      2. Drive at the required speed (43 km/h (27 mph) or higher).
      3. Push the cruise control main switch to - (COAST)/SET.
      4. Cancel the cruise control system by performing any of the above operations (other than turning the main switch off).
      5. After pushing the cruise control main switch to + (ACCEL)/RES (RESUME) at a driving speed of more than 40 km/h (25 mph), check that the vehicle resumes the speed set prior to the cancellation.

        HINT: 

        The stored vehicle speed is retained even if vehicle speed drops below 40 km/h (25 mph) once. The previously stored vehicle speed can be resumed by pushing the cruise control main switch to + (ACCEL)/RES (RESUME) when vehicle speed returned to approximately 40 km/h (25 mph) or more.