Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Fail-safe Chart

FAIL-SAFE CHART

HINT:

If any of the following auto cancel conditions are detected while the dynamic radar cruise control system is controlling vehicle speed, the system clears the stored vehicle speed and cancels control of vehicle speed by the dynamic radar cruise control system.

Automatic Cancel Control

Constant Speed Control Mode:

Auto Cancel Condition

Warning

Fail-safe Deactivation Condition

Multi-information Display

Master Warning Light

Cruise Control Indicator

Warning Buzzer

Open or short in stop light switch circuit

Cruise Control Malfunction Visit Your Dealer

Illuminates

Does not illuminate

Sounds

Dynamic radar cruise control system is turned off and back on again using the cruise control main switch.

  • Problem with stop light switch input circuit
  • Problem with cruise control main switch cancel circuit
  • Malfunction in the electronically controlled brake system
  • Communication stop between skid control ECU (brake booster with master cylinder assembly) and hybrid vehicle control ECU

Cruise Control Malfunction Visit Your Dealer

Illuminates

Does not illuminate

Sounds

Power switch is turned off and back on (IG) again.

If the following condition occurs, the hybrid vehicle control ECU cancels control of vehicle speed by the dynamic radar cruise control system (stored vehicle speed is maintained):

  • Vehicle speed is less than approximately 40 km/h (25 mph) while driving with the dynamic radar cruise control system controlling vehicle speed

-

Does not illuminate

Illuminates

-

+RES switch is pushed.

Malfunction in hybrid control system

-

Illuminates

Does not illuminate

-

Dynamic radar cruise control system is turned off and back on again using the cruise control main switch.

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

-

Does not illuminate

Illuminates

-

-SET switch is pushed.

  • VSC operates while driving with dynamic radar cruise control system controlling vehicle speed
  • TRAC operates for a certain period of time while driving with dynamic radar cruise control system controlling vehicle speed.
  • TRAC is turned off
  • VSC is turned off
  • Drive start control is performed

-

Does not illuminate

Illuminates

-

+RES switch is pushed.

Vehicle-to-vehicle Distance Control Mode:

Auto Cancel Condition

Warning

Fail-safe Deactivation 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 Malfunction Visit Your Dealer

Illuminates

Does not illuminate

Sounds

Dynamic radar cruise control system is turned off and back on again using the cruise control main switch.

Malfunction in hybrid control system

-

Illuminates

Does not illuminate

-

Dynamic radar cruise control system is turned off and back on again using the cruise control main switch.

If either of the following conditions occurs, the hybrid vehicle control ECU cancels control of vehicle speed by the dynamic radar cruise control system (stored vehicle speed is maintained):

  • Vehicle speed is less than approximately 40 km/h (25 mph) while driving with the dynamic radar cruise control system controlling vehicle speed
  • A preceding vehicle is not detected when follow-up control is being performed at a vehicle speed of approximately 40 km/h (25 mph) or less

-

Does not illuminate

Illuminates

Sounds

+RES switch is pushed.

  • Malfunction in the millimeter wave radar sensor assembly
  • Beam axis of millimeter wave radar sensor assembly misaligned
  • The electric parking brake system is malfunctioning
  • Problem with stop light switch input circuit
  • Brake hold system malfunction

Cruise Control Malfunction Visit Your Dealer

Illuminates

Does not illuminate

Sounds

Power switch is turned off and back on (IG) again.

If the following condition occurs, the hybrid vehicle control ECU cancels control of vehicle speed by the dynamic radar cruise control system (stored vehicle speed is maintained):

  • Millimeter wave radar sensor assembly becomes dirty

Radar Cruise Control Unavailable Clean Sensor

Illuminates

Does not illuminate

Sounds

The condition returns to normal (the resume function can be operated after fail-safe is deactivated).

If any of the conditions listed below occurs, the hybrid vehicle control ECU cancels control of vehicle speed by the dynamic radar cruise control system (stored vehicle speed is maintained):

  • Millimeter wave radar sensor assembly sensitivity reduced because of bad weather such as rain, fog, snow, or sandstorm
  • Brake control by the dynamic radar cruise control system is temporarily unavailable
  • The beam axis of the millimeter wave radar sensor assembly is being aligned
  • The forward recognition camera is temporarily unavailable
  • A system check is being performed after the engine has started*1

Radar Cruise Control Unavailable

Illuminates

Does not illuminate

Sounds

The conditions return to normal (the resume function can be operated after fail-safe is deactivated).

  • VSC operates while driving with cruise control system controlling vehicle speed
  • TRAC operates for a certain period of time while driving with cruise control system controlling vehicle speed
  • TRAC is turned off
  • VSC is turned off
  • Drive start control is performed
  • Electric parking brake is applied

-

Does not illuminate

Illuminates

-

+RES switch is pushed.

If any of the following conditions occur while the vehicle stopped, the hybrid vehicle control ECU cancels control of vehicle speed by the dynamic radar cruise control system:

  • Open or short in stop light switch circuit
  • Malfunction in the millimeter wave radar sensor assembly
  • Beam axis of millimeter wave radar sensor assembly misaligned
  • Brake hold system malfunction
  • Problem with cruise control main switch cancel circuit
  • Millimeter wave radar sensor assembly sensitivity reduced because of bad weather such as rain, fog, snow, or sandstorm
  • Millimeter wave radar sensor assembly becomes dirty
  • Brake control by the dynamic radar cruise control system is temporarily unavailable
  • The beam axis of the millimeter wave radar sensor assembly is being aligned
  • The forward recognition camera is temporarily unavailable
  • A system check is being performed after the engine has started*1

Cruise Control Fault Press Brake to Deactivate Visit Your Dealer

Illuminates

Does not illuminate

Sounds

The conditions return to normal (the resume function can be operated after fail-safe is deactivated).

If any of the following conditions occur while the vehicle is stopped, the hybrid vehicle control ECU cancels control of vehicle speed by the dynamic radar cruise control system:

  • The driver seat belt is unfastened
  • The driver door is opened
  • The vehicle is parked for a long period of time
  • The vehicle is stopped on a steep hill
  • A preceding vehicle is not detected

Radar Cruise Control Unavailable Press Brake to Resume Driving

Does not illuminate

Illuminates

-

The conditions return to normal (the resume function can be operated after fail-safe is deactivated).

    Dtc Check / Clear

    Freeze Frame Data

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