Dynamic Radar Cruise Control System: Fail-Safe

Constant speed control mode and vehicle-to-vehicle distance control mode:

If the following conditions are detected while the dynamic radar cruise control system is in operation, the system clears the stored vehicle speed in the driving support ECU and cancels the dynamic radar cruise control operation.

Fig 1: Identifying Master Warning Light & CRUISE Main Indicator Light

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

VEHICLE CONDITION TABLE

Vehicle Condition	Auto Cancel Condition	Fail-safe Deactivation Condition
CRUISE main indicator light blinks Master warning light turns on "Check Cruise Control System" is displayed "Pong" warning sound is heard	Open or short in stop light switch circuit Problem with vehicle speed signal Problem with throttle position sensor and motor	Turn cruise control switch ON

Vehicle-to-vehicle distance control mode:

Fig 2: Identifying Master Warning Light And CRUISE Main Indicator Light

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

VEHICLE CONDITION TABLE

Vehicle Condition	Auto Cancel Condition	Fall-safe Deactivation Condition
CRUISE main indicator light blinks Master warning light turns on "Check Cruise Control System" is displayed "Pong" warning sound is heard	There is problem with millimeter wave radar sensor Beam axis of millimeter wave radar sensor deviates	Turn engine switch on (IG)

Vehicle-to-vehicle distance control mode:

Fig 3: Identifying Master Warning Light And CRUISE Main Indicator Light

If the following conditions are detected while the dynamic radar cruise control system is in operation, the system maintains the stored vehicle speed in the driving support ECU and cancels the dynamic radar cruise control operation.

VEHICLE CONDITION TABLE

Vehicle Condition	Auto Cancel Condition	Fail-safe Deactivation Condition
Master warning light turns on "Clean Radar Sensor" is displayed "Pong" warning sound is heard	There is dirt on millimeter wave radar sensor	Recover from condition on left (RESUME operation is possible after recovery)
Master warning light turns on "Cruise Control not available" is displayed "Pong" warning sound is heard	Wiper switch is in HI position ECT-SNOW switch is on Millimeter wave radar sensor is least sensitive because of bad weather such as rain, fog, snow and sandstorms	Recover from condition on left (RESUME operation is possible after recovery) Turn cruise control main switch ON