Fail-Safe Chart

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

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 Cruise Main Indicator Light And Master Warning Light Indicator

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

VEHICLE CONDITION CHART

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 Cruise Main Indicator Light And Master Warning Light Indicator

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

VEHICLE CONDITION CHART

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	There is problem with front millimeter wave radar sensor Beam axis of millimeter wave radar sensor deviates	Turn power switch ON (IG)

Vehicle-to-vehicle distance control mode:

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

VEHICLE CONDITION CHART

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 front millimeter wave radar sensor	Recover from condition on left (RESUME operation is possible after recovery)

Vehicle-to-vehicle distance control mode:

Fig 4: Identifying Cruise Main Indicator Light And Master Warning Light Indicator

VEHICLE CONDITION CHART

Vehicle Condition	Auto Cancel Condition	Fail-safe Deactivation Condition
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 Front millimeter wave radar sensor is least sensitive because of bad weather such as ram, fog snow and sandstorms	Recover from condition on left (RESUME operation is possible after recovery) Turn cruise control switch ON