Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM1000000018WR5
Model Year Start: 2018 Model: Sienna Prod Date Range: [11/2017 -           ]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: FAIL-SAFE CHART; 2018 - 2020 MY Sienna [11/2017 -        ]

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.

1. Automatic Cancel Control

Constant Speed Control Mode:

Auto Cancel Condition

Warning

Fail-safe Deactivation Condition

Multi-information Display

Master Warning Light

Warning Buzzer

Open or short in stop light switch circuit

Check Cruise Control System

Illuminates

Sounds

Dynamic radar cruise control system is turned off and back on again using the cruise control main switch (ON-OFF button).

If the following condition occurs, the ECM 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

Sounds

Cruise control main switch is pushed to +RES

Malfunction in SFI system

-

Does not illuminate

-

Dynamic radar cruise control system is turned off and back on again using the cruise control main switch (ON-OFF button).

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

-

Does not illuminate

-

Cruise control main switch is pushed to -SET
  • Vehicle stability control system operates while driving with dynamic radar cruise control system controlling vehicle speed
  • TRC system operates for a certain period of time while driving with dynamic radar cruise control system controlling vehicle speed.
  • TRC is turned off
  • VSC is turned off
  • Drive start control is performed

-

Does not illuminate

-

Cruise control main switch is pushed to +RES
  • Problem with stop light switch input circuit
  • Problem with cruise control main switch cancel circuit
  • Malfunction in the vehicle stability control system
  • Communication stop between skid control ECU (brake actuator assembly) and ECM

Check Cruise Control System

Illuminates

Sounds

Ignition switch is turned off and back to ON again.

Vehicle-to-vehicle Distance Control Mode:

Auto Cancel Condition

Warning

Fail-safe Deactivation Condition

Multi-information Display

Master Warning Light

Warning Buzzer

Open or short in stop light switch circuit

Check Cruise Control System

Illuminates

Sounds

Dynamic radar cruise control system is turned off and back on again using the cruise control main switch (ON-OFF button).

Malfunction in SFI system

-

Does not illuminate

-

Dynamic radar cruise control system is turned off and back on again using the cruise control main switch (ON-OFF button).

If either of the following conditions occurs, the ECM 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

Sounds

Cruise control main switch is pushed to +RES
  • Malfunction in the millimeter wave radar sensor assembly
  • Beam axis of millimeter wave radar sensor assembly misaligned
  • Problem with stop light switch input circuit
  • Problem with cruise control main switch cancel circuit

Check Cruise Control System

Illuminates

Sounds

Ignition switch is turned off and back to ON again.

If the following condition occurs, the ECM 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

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 ECM 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

Radar Cruise Control Unavailable

Illuminates

Sounds

The conditions return to normal (the resume function can be operated after fail-safe is deactivated).
  • Vehicle stability control system operates while driving with cruise control system controlling vehicle speed
  • TRC system operates for a certain period of time while driving with cruise control system controlling vehicle speed.
  • TRC is turned off
  • VSC is turned off
  • Drive start control is performed

-

Does not illuminate

-

Cruise control main switch is pushed to +RES