Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Fail-Safe Chart
- Constant speed control mode and vehicle-to-vehicle distance control mode:
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.
TEXT IN ILLUSTRATION*1 Cruise Control Indicator Light
(Constance speed control mode)*2 Cruise Control Indicator Light
(Vehicle-to-vehicle distance control mode)Vehicle Condition Auto Cancel Condition Fail-safe Deactivation Condition - Cruise control indicator light blinks
- A warning message is displayed
- "Pong" warning sound is heard
- Open or short in stop light switch circuit
- Problem with vehicle speed signal
Cruise control system is turned off and back on again using the cruise control switch (ON-OFF button). - Vehicle-to-vehicle distance control mode:
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.
TEXT IN ILLUSTRATION*1 Vehicle-to-vehicle Cruise Control Indicator Light Vehicle Condition Auto Cancel Condition Fail-safe Deactivation Condition - Vehicle-to-vehicle cruise control indicator light blinks
- A warning message is displayed
- "Pong" warning sound is heard
- Problem with millimeter wave radar sensor
- Beam axis of millimeter wave radar sensor deviates
- Communication stop between skid control ECU and driving support ECU assembly
Power switch is turned off and back on (READY) again. - Vehicle-to-vehicle distance control mode:
If any of the following auto cancel conditions are detected while the dynamic radar cruise control system is controlling vehicle speed, the system maintains the stored vehicle speed in memory and cancels control of vehicle speed by the dynamic radar cruise control system.
TEXT IN ILLUSTRATION*1 Vehicle-to-vehicle Cruise Control Indicator Light Vehicle Condition Auto Cancel Condition Fail-safe Deactivation Condition - Vehicle-to-vehicle cruise control indicator light blinks
- A warning message is displayed
- "Pong" warning sound is heard
- There is dirt on millimeter wave radar sensor
- Wipers operating on HI setting
- Millimeter wave radar sensor sensitivity reduced because of bad weather such as rain, fog, snow, or sandstorm
Cruise control system is turned off and back on again using the cruise control switch (ON-OFF button). - Constant speed control mode:
If the following auto cancel condition is 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.
Vehicle Condition Auto Cancel Condition Fail-safe Deactivation Condition Cruise control indicator light on Vehicle speed is lower than stored speed by approximately 16 km/h (10 mph) or more Cruise control switch is pushed -/SET - Constant speed control mode and vehicle-to-vehicle distance control mode:
If the following auto cancel condition is detected while the dynamic radar cruise control system is controlling vehicle speed, the system maintains the stored vehicle speed in memory and cancels control of vehicle speed by the dynamic radar cruise control system.
Vehicle Condition Auto Cancel Condition Fail-safe Deactivation Condition Cruise control indicator light on VSC system operates while driving with cruise control system controlling vehicle speed Push the cruise control switch to +/RES - Constant speed control mode and vehicle-to-vehicle distance control mode:
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.
Vehicle Condition Auto Cancel Condition Fail-safe Deactivation Condition Cruise control indicator light on - Malfunction in the hybrid vehicle control system
- Problem with vehicle speed signal and yaw rate sensor signal
Cruise control system is turned off and back on again using the cruise control switch (ON-OFF button). - Constant speed control mode and vehicle-to-vehicle distance control mode:
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.
TEXT IN ILLUSTRATION*1 Cruise Control Indicator Light
(Constance speed control mode)*2 Cruise Control Indicator Light
(Vehicle-to-vehicle distance control mode)Vehicle Condition Auto Cancel Condition Fail-safe Deactivation Condition - Cruise control indicator light blinks
- A warning message is displayed
- "Pong" warning sound is heard
- Problem with stop light switch input circuit
- Problem with cruise control switch cancel circuit
Power switch is turned off and back on (READY) again.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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