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Home >> Lexus >> 2008 >> RX 400h AWD >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Cruise Control >> Dynamic Laser Cruise Control System >> Road Test
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Road Test

  1. PROBLEM SYMPTOM CONFIRMATION 

HINT:

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

  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 -/SET.
    4. After releasing the switch, check that the vehicle cruises at the set speed.
    Fig 1: Identifying Cruise Control Main Switch Direction
    G04951406Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Inspect the + (ACCELERATION) 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 -/SET.
    4. Check that vehicle speed increases while the cruise control main switch is pushed to +/RES, and that the vehicle cruises at the newly set speed when the switch is released.
    5. Momentarily push the cruise control main switch +/RES and then immediately release it. 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 (CANADA) or 5 mph (USA).

    Fig 2: Identifying Cruise Control Main Switch Direction
    G04951407Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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 -/SET.
    4. Check that vehicle speed decreases while the cruise control main switch is pushed to -/SET, and the vehicle cruises at the newly set speed when the switch is released.
    5. Momentarily push the cruise control main switch to -/SET, and then immediately release it. 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 (CANADA) or 5 mph (USA).

    Fig 3: Identifying Cruise Control Main Switch Direction
    G04951406Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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 -/SET.
    4. When performing one of the following, check that the cruise control system is cancelled and that the normal driving mode is reset.
    • Depressing the brake pedal
    • Moving the shift lever to any position except D
    • Turning the main switch OFF
    • Pulling the cruise control main switch to CANCEL
    Fig 4: Identifying Cruise Control Main Switch Direction
    G04951409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Inspect the RES (RESUME) 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 -/SET.
    4. Cancel the cruise control system according to any of the above operations (other than turning the main switch OFF).
    5. After pushing the cruise control main switch to +/ RES at a driving speed of more than 40 km/h (25 mph), check that the vehicle drives at the set speed.

HINT:

The stored vehicle speed is retained even if 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 when vehicle speed returned to approximately 40 km/h (25 mph) or more.

Fig 5: Identifying Cruise Control Main Switch Direction
G04951407Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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