Lexus NX: Fail-safe Chart

FAIL-SAFE CHART

Constant Speed Control Mode:

Condition

Multi-information Display

Master Warning Light

Cruise Control Indicator

Warning Buzzer

When the following condition(s) occurs while the vehicle is in motion during cruise control, the system clears the set vehicle speed and cancels cruise control.

  1. When the vehicle running speed has fallen below the lower speed limit (approximately 30 km/h [20 mph])

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Does not illuminate

Illuminates

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When the following condition(s) occurs while the vehicle is in motion during cruise control, the system clears the set vehicle speed and cancels cruise control. Cruise control is prohibited until the power switch is turned off.

  1. Malfunction in hybrid control system

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Illuminates

Does not illuminate

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When the following condition(s) occurs while the vehicle is in motion during cruise control, there is a possibility of overloading or an overly high set vehicle speed and such. Clear the set vehicle speed and cancel cruise control (can be reset).

  1. Vehicle speed is less than set vehicle speed by approximately 16 km/h (10 mph) or more

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Does not illuminate

Illuminates

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When the following condition(s) occurs while the vehicle is in motion during cruise control, the system clears the set vehicle speed and cancels cruise control. Cruise control is prohibited until the power switch is turned off.

  1. Open or short in stop light switch circuit
  2. Malfunction in stop light switch input circuit
  3. Malfunction in cruise control cancel circuit
  4. Malfunction in the electronically controlled brake system
  5. Communication malfunction between skid control ECU (brake booster with master cylinder assembly) and hybrid vehicle control assembly

Cruise Control Malfunction Visit Your Dealer

Illuminates

Does not illuminate

Sounds

When the following condition(s) occurs while the vehicle is in motion during cruise control, cruise control (set vehicle speed is held) is canceled.

  1. VSC operates
  2. TRAC operates for a certain period of time
  3. Parking support brake operates
  4. Drive start control is performed
  5. Electric parking brake is applied
  6. TRAC/VSC is turned off
  7. Pre-collision system operates

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Does not illuminate

Illuminates

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Automatic Cancel Control

Vehicle-to-Vehicle Distance Control Mode:

Condition

Multi-information Display

Master Warning Light

Cruise Control Indicator

Warning Buzzer

When the following condition(s) occurs while the vehicle is in motion during dynamic radar cruise control, the system clears the set vehicle speed and cancels cruise control. Cruise control is prohibited until the power switch is turned off.

  1. Malfunction in hybrid control system

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Illuminates

Does not illuminate

-

When the following condition(s) occurs while the vehicle is in motion during dynamic radar cruise control, the system clears the set vehicle speed and cancels cruise control. Cruise control is prohibited until the power switch is turned off.

  1. Open or short in stop light switch circuit
  2. Malfunction in stop light switch input circuit
  3. Malfunction in cruise control cancel circuit
  4. Malfunction in the electronically controlled brake system
  5. Communication malfunction between skid control ECU (brake booster with master cylinder assembly) and hybrid vehicle control ECU
  6. Malfunction in the millimeter wave radar sensor assembly
  7. Beam axis of millimeter wave radar sensor assembly misaligned
  8. Malfunction in brake hold system

Cruise Control Malfunction Visit Your Dealer

Illuminates

Does not illuminate

Sounds

When the following condition(s) occurs while the vehicle is in motion during dynamic radar cruise control, the system clears the set vehicle speed and cancels cruise control. Control is prohibited until the dynamic radar cruise control system is turned off and turned on again. Also, cruise control is prohibited until system returns to normal from the following condition.

  1. Millimeter wave radar sensor assembly dirty
  2. Forward recognition camera dirty

HINT:

It is possible that the system has entered fail-safe mode due to snow or water on the front grille.

Radar Cruise Control Unavailable See Owner's Manual

Illuminates

Does not illuminate

Sounds

When the following condition(s) occurs while the vehicle is in motion during dynamic radar cruise control, the system clears the set vehicle speed and cancels cruise control. Control is prohibited until the dynamic radar cruise control system is turned off and turned on again. Also, cruise control is prohibited until system returns to normal from the following condition.

  1. When vehicle-to-vehicle distance measurement is extremely unstable due to bad weather
  2. Brake control by the dynamic radar cruise control system is temporarily unavailable
  3. Malfunction in the forward recognition camera or the forward recognition camera is temporarily unavailable

Radar Cruise Control Unavailable

Illuminates

Does not illuminate

Sounds

When the following condition(s) occurs while the vehicle is in motion during dynamic radar cruise control, cruise control (set vehicle speed is held) is canceled.

  1. VSC operates
  2. TRAC operates for a certain period of time
  3. Parking support brake operates
  4. Drive start control is performed
  5. Electric parking brake is applied
  6. TRAC/VSC is turned off
  7. Pre-collision system operates

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Does not illuminate

Illuminates

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When the following condition(s) occurs while the vehicle is stopped on hold, cruise control is canceled. (w/ Full-Speed Range Following Function)

  1. Open or short in stop light switch circuit
  2. Malfunction in stop light switch input circuit
  3. Malfunction in cruise control cancel circuit
  4. Malfunction in the electronically controlled brake system
  5. Communication malfunction between skid control ECU (brake booster with master cylinder assembly) and hybrid vehicle control assembly
  6. Malfunction in the millimeter wave radar sensor assembly
  7. Beam axis of millimeter wave radar sensor assembly misaligned
  8. Malfunction in brake hold system
  9. When vehicle-to-vehicle distance measurement is extremely unstable due to bad weather
  10. Brake control by the dynamic radar cruise control system is temporarily unavailable
  11. Malfunction in the forward recognition camera or the forward recognition camera is temporarily unavailable

Cruise Control Fault Press Brake to Deactivate Visit Your Dealer

Illuminates

Does not illuminate

Sounds

When the following condition(s) occurs while the vehicle is stopped on hold, cruise control is canceled. (w/ Full-Speed Range Following Function)

  1. Driver seat belt is unfastened
  2. Driver door is opened
  3. Vehicle is stopped for a long period of time
  4. Vehicle is stopped on a steep hill

Radar Cruise Control Unavailable Press Brake to Resume Driving

Does not illuminate

Illuminates

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