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Home >> Lexus >> 2008 >> IS F >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Cruise Control >> Dynamic Radar Cruise Control System >> Road Test

Road Test

  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.
      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.
        Fig 1: Identifying Cruise Control Main Switch Operating Directions - SET Function
        G04951406Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect the + (ACCEL) function
      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
        Fig 2: Identifying Cruise Control Main Switch Operating Directions - (ACCEL) Function
        G04951407Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      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 (1.0 mph), vehicle-to-vehicle distance control mode. increases by 5 km/h (3 mph)

    3. Inspect the - (COAST) function
      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
        Fig 3: Identifying Cruise Control Main Switch Operating Directions - (COAST) Function
        G04951406Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      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 0 mph), vehicle-to-vehicle distance control mode decreases by 5 km/h (3 mph).

    4. Inspect the CANCEL function
      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
        Fig 4: Identifying Cruise Control Main Switch Operating Directions - CANCEL Function
        G04951409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        • Depressing the brake pedal
        • The shift lever is moved from D to N or M
        • Selecting the D3, D2 or D1 range with the shift lever in D
        • Turning the main switch off
        • Pulling the cruise control main switch to CANCEL
    5. Inspect the RES (RESUME) function.
      Fig 5: Identifying Cruise Control Main Switch Operating Directions - RES (RESUME) Function
      G04951407Courtesy 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.