2017 LK

INTELLIGENT SPEED LIMITER (ISL) CONTROLS

WARNING

The Intelligent Speed Limiter (ISL) is a driving aid only. Driving with due care and attention, and in a manner which is safe for the vehicle, its occupants and other road users, remains the driver’s responsibility. The driver should still observe all other road signs, road markings, and situations that are not detected or recognized by the traffic sign recognition system.

WARNING

In certain conditions, such as a steep downhill gradient, the vehicle's speed may exceed the set speed limit. Driver intervention may be required as engine braking is unable to maintain or reduce the vehicle's speed.

NOTES

The ISL is not available when cruise control is in operation.

  1. LIM.

  2. SET+.

  3. -.

  4. CANCEL.

  5. RES.

The ISL works in conjunction with the traffic sign recognition system and the navigation system to restrict the maximum vehicle speed. The maximum speed, is set based on the information received from both these systems. If the system cannot determine a valid maximum speed, ISL is deactivated and the Automatic Speed Limiter (ASL) is activated. See AUTOMATIC SPEED LIMITER (ASL) CONTROLS.

To switch the ISL on, press the LIM button on the center console. Depending on vehicle status, either the ASL or the ISL information lamp is displayed in the instrument panel. If ASL is displayed, press and hold the CANCEL button on the steering wheel. The ASL information lamp is replaced with the ISL information lamp to confirm that ISL has been selected. See INTELLIGENT SPEED LIMITER (ISL) (AMBER).

The ISL does not operate until activated. To activate the ISL, press the SET+ button or the RES button on the steering wheel. Detected speed limits are displayed as icons in the instrument panel and Head-Up Display (HUD). See HEAD-UP DISPLAY (HUD).

NOTES

The ISL can also be switched on and off via the Driver Assistance instrument panel menu. If cruise control is in operation, this option is grayed-out in the instrument panel. See INSTRUMENT PANEL MENU.

If the ISL detects a speed limit lower than the current vehicle speed, the system automatically slows the vehicle to meet the speed limit. Pressing the RES button on the steering wheel increases the rate of deceleration.

If the ISL detects a speed limit higher than the current vehicle speed, the system allows the driver to accelerate up to meet the speed limit. Pressing the RES button on the steering wheel increases the rate of acceleration.

To suspend ISL operation, press the CANCEL button on the steering wheel. To resume ISL operation, press the RES button or the SET+ button on the steering wheel.

When ISL is active, vehicle speed may increase in certain conditions, e.g., when traveling downhill. If the vehicle’s speed rises by more than 2 mph (3.5 km/h) above the ISL detected speed limit, a warning message is displayed in the message center. If the vehicle’s speed rises by more than 5 mph (7 km/h) above the ISL detected speed limit for 4 seconds, a chime also sounds.

The ISL detected speed limit can be overridden if rapid acceleration is required. Rapid acceleration is also known as kickdown. See AUTOMATIC TRANSMISSION.

If kickdown is required, the vehicle accelerates past the ISL detected speed limit. When the vehicle's speed drops below the ISL detected speed limit, any speed limitations are reapplied.

The ISL detected speed limit can be adjusted, if required, to control the vehicle’s speed at just above or below the detected speed limit. To adjust the detected speed limit:

  1. Press the SET+ button to raise the maximum vehicle speed 1 mph (1.5 km/h) above the detected speed limit. The maximum increase available is 6 mph (10 km/h) above the detected speed limit. Press and hold the SET+ button to raise the maximum vehicle speed directly to 6 mph (10 km/h) above the detected speed limit.

  2. Press the - button to lower the maximum vehicle speed 1 mph (1.5 km/h) below the detected speed limit. The maximum decrease available is 6 mph (10 km/h) below the detected speed limit. Press and hold the - button to lower the maximum vehicle speed directly to 6 mph (10 km/h) below the detected speed limit.

WARNING

Speed limiters are convenience features only. Speed limiters do not remove the driver’s responsibility to adhere to the legal speed limit.

NOTES

Any adjustments to the ISL detected speed limit are lost if ASL is activated, or the vehicle’s ignition is switched off.

If the traffic sign recognition system cannot determine a valid speed limit, it displays - - -. If this occurs, the ISL remains set at the last known valid speed limit. If the traffic sign recognition system is unable to detect a valid speed limit within a short period of time, the ISL is deactivated. If this occurs, the ASL is activated.

ISL limitations:

The following ISL operating limitations apply:

  1. ISL performance and accuracy is only as good as the information provided to it by the traffic sign recognition system. See TRAFFIC SIGN RECOGNITION.

  2. ISL performance and accuracy is only as good as the information provided to it by the navigation system. Always make sure the system is operating correctly, and has the latest software. See MAP UPDATES.

  3. The maximum speed limit recognized by the ISL is 80 mph (130 km/h). For any detected speeds above this figure, the ISL sets an unlimited maximum speed.

  4. The minimum speed limit recognized by the ISL is 19 mph (30 km/h). For any detected speeds below this figure, the ISL sets a speed limit of 19 mph (30 km/h). The message LIMITER SET SPEED ABOVE SPEED LIMIT is displayed in the message center.