Lexus ES manuals

Lexus ES: Fail-safe Chart

FAIL-SAFE CHART

Automatic Cancel Control

(a) When the vehicle is being driven in constant speed control mode and any of the following malfunctions occur, control of vehicle speed by the dynamic cruise control system is canceled.

Auto Cancel Condition

Multi-information Display

Master Warning Light

Cruise Control Indicator

Warning Buzzer

Set Vehicle Speed

Hint

Open or short in stop light switch circuit

Cruise Control Malfunction Visit Your Dealer

Illuminates

Does not illuminate

Sounds

Cleared

-

Malfunction in stop light switch input circuit

Malfunction in cruise control cancel circuit

Malfunction in the electronically controlled brake system

Communication malfunction between skid control ECU (brake booster with master cylinder assembly) and hybrid vehicle control ECU

Malfunction in hybrid control system

-

Illuminates

Does not illuminate

-

Cleared

-

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

-

Does not illuminate

Illuminates

-

Cleared

Set vehicle speed can be set again.

Vehicle speed is less than approximately 30 km/h (20 mph)

-

Does not illuminate

Illuminates

-

Maintained

-

VSC operates

TRAC operates for a certain period of time

Electric parking brake is applied

TRAC is turned off

VSC is turned off

Pre-collision system operates

(b) When the vehicle is being driven in vehicle-to-vehicle distance control mode and any of the following malfunctions occur, control of vehicle speed by the dynamic cruise control system is canceled.

Auto Cancel Condition

Multi-information Display

Master Warning Light

Cruise Control Indicator

Warning Buzzer

Set Vehicle Speed

Hint

*1: w/ Parking Support Brake System

*2: for Speedometer with Imperial Units for Main Scale

Open or short in stop light switch circuit

Cruise Control Malfunction Visit Your Dealer

Illuminates

Does not illuminate

Sounds

Cleared

-

Malfunction in stop light switch input circuit

Malfunction in cruise control cancel circuit

Malfunction in the millimeter wave radar sensor assembly

Beam axis of millimeter wave radar sensor assembly misaligned

Malfunction in brake hold system

Millimeter wave radar sensor assembly dirty

Radar Cruise Control Unavailable See Owner's Manual

Illuminates

Does not illuminate

Sounds

Cleared

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

Forward recognition camera dirty

Millimeter wave radar sensor assembly performance reduced because of bad weather such as rain, fog, snow, or sandstorm

Radar Cruise Control Unavailable

Illuminates

Does not illuminate

Sounds

Cleared

-

Brake control by the dynamic radar cruise control system is temporarily unavailable

Forward recognition camera is temporarily unavailable

System check after engine start is being performed*2

Malfunction in hybrid control system

-

Illuminates

Does not illuminate

-

Cleared

-

VSC operates

-

Does not illuminate

Illuminates

-

Maintained

-

TRAC operates for a certain period of time

Parking support brake system is performed*1

Drive start control is performed

Electric parking brake is applied

TRAC is turned off

VSC is turned off

Pre-collision system operates

(c) If any of the following conditions are met when the vehicle is stopped while in vehicle-to-vehicle distance control mode, control of the vehicle by the dynamic radar cruise control system will be canceled.

Auto Cancel Condition

Multi-information Display

Master Warning Light

Cruise Control Indicator

Warning Buzzer

*1: for Speedometer with Imperial Units for Main Scale

Open or short in stop light switch circuit

Cruise Control Fault Press Brake to Deactivate Visit Your Dealer

Illuminates

Does not illuminate

Sounds

Malfunction in cruise control cancel circuit

Malfunction in the millimeter wave radar sensor assembly

Beam axis of millimeter wave radar sensor assembly misaligned

Malfunction in brake hold system

Millimeter wave radar sensor assembly dirty

Millimeter wave radar sensor assembly performance reduced because of bad weather such as rain, fog, snow, or sandstorm

Brake control by the dynamic radar cruise control system is temporarily unavailable

Forward recognition camera is temporarily unavailable

System check after engine start is being performed*1

Driver seat belt is unfastened

Radar Cruise Control Unavailable Press Brake to Resume Driving

Does not illuminate

Illuminates

-

Driver door is opened

Vehicle is stopped for a long period of time

Vehicle is stopped on a steep hill

A preceding vehicle is not detected

Electric parking brake is applied

-

Does not illuminate

Illuminates

-

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