HANDLING PRECAUTION FOR DYNAMIC RADAR CRUISE CONTROL SYSTEM
Keep in mind the following points when servicing vehicles equipped with the dynamic radar cruise control system.
The dynamic radar cruise control system is designed to be used when driving on highways and freeways. As the system may not operate correctly when driving on roads used by pedestrians and bicycles, do not use dynamic radar cruise control system on roads used by pedestrians and bicycles as an accident may result.
Do not overly rely on the dynamic radar cruise control system.
The dynamic radar cruise control system is designed to assist in maintaining an appropriate distance with the preceding vehicle, however, the system alone is not sufficient. Pay constant attention to the vehicle-to-vehicle distance and the traffic conditions when using the dynamic radar cruise control system and decelerate with the brake pedal or accelerate with the accelerator pedal according to the situation to keep an appropriate distance with the preceding vehicle.
The dynamic radar cruise control system applies brakes as necessary, however, there is a limitation on the deceleration control capability. When the preceding vehicle decelerates rapidly or another vehicle moves in front of the vehicle, decelerating in time to avoid a collision may not be possible without additional braking.
The millimeter wave radar sensor assembly dirt detection function.
The millimeter wave radar sensor assembly can automatically detect dirt on the sensor face or the front or back surface of the radar sensor cover, however, dirt may not always be detected.
The dirt detection function may not operate if a metal object or plastic sheet with metal coating is attached to the sensor or the radar sensor cover.
The dirt detection function may not operate if there is snow or ice on the sensor or the radar sensor cover.
The preceding conditions may result in the vehicle being unable to maintain an appropriate distance with the preceding vehicle.
Keep the sensor face and the front and back surfaces of the radar sensor cover clean.
The dynamic radar cruise control system does not operate or give a vehicle approach warning for vehicles which are stopped or driving at significantly slower speeds.
When following another vehicle with vehicle-to-vehicle distance control mode controlling vehicle speed, the vehicle will not accelerate if the +RES switch is pushed, as the speed is controlled in accordance with the speed of the preceding vehicle.
If the set vehicle speed is increased by pushing the +RES switch, the vehicle will accelerate to the newly set vehicle speed when the preceding vehicle moves out of the lane.
The set vehicle speed can be confirmed on the multi-information display.
The actual vehicle-to-vehicle distance may be shorter than the set vehicle-to-vehicle distance when driving on a downhill road.
When a system malfunction is detected, the master warning light illuminates, a warning message is displayed on the multi-information display in the combination meter assembly and the buzzer sounds.
Keep the windshield glass clean.
Do not apply excessive force to the forward recognition camera or subject it to a strong impact.
Do not disassemble the forward recognition camera.
Do not attach a sticker to the windshield glass in the area in front of the forward recognition camera.
If the heater is used with FOOT mode selected, the upper area of the windshield glass may fog up, affecting the operation of the forward recognition camera.
If the windshield glass fogs up, clear it using the front defroster.
Do not damage the forward recognition camera lens or allow it to become dirty.
When cleaning the inner surface of the windshield glass, do not allow cleaning agent to contact the forward recognition camera lens.
Do not touch the forward recognition camera lens.
Do not place any objects on top of the instrument panel.
If an object is reflecting off of the windshield glass, the performance of the forward recognition camera may decrease.
The vehicle approach warning buzzer does not sound when constant speed control mode is controlling vehicle speed because the presence of and distance to the preceding vehicle is not calculated.
As the controls performed by constant speed control mode and vehicle-to-vehicle distance control mode are different, always confirm which mode is selected before operating the dynamic radar cruise control system.
When operating the turn signal switch when in vehicle-to-vehicle distance control mode, the distance to the preceding vehicle may reduce as part of preparation to change lanes.
Take the following precautions concerning the dynamic radar cruise control system.
Turn the dynamic radar cruise control system off using the cruise control main switch when not using the dynamic radar cruise control system.
Be careful as the vehicle speed may increase beyond the set vehicle speed when driving downhill even when the dynamic radar cruise control system is controlling vehicle speed.
If cruise control operation was canceled, and if the vehicle speed is within the settable speed range, pushing the +RES switch restores the vehicle speed memorized at the time of cancellation, and constant speed control resumes. If the vehicle is being driven at a constant speed, pushing the +RES switch accelerates the vehicle.
If the cruise control indicator turns off and a warning message is displayed when the dynamic radar cruise control system is controlling vehicle speed, turn the dynamic radar cruise control system off then on using the cruise control main switch and set the dynamic radar cruise control system set vehicle speed again. If the dynamic radar cruise control system does not turn on or stops functioning immediately after being set, there may be a malfunction in the dynamic radar cruise control system.
Do not use the dynamic radar cruise control system where the road conditions are as follows:
Heavy traffic
Steep downhill roads
Roads with sharp turns
Icy or snowy roads
Slippery roads
Do not use the dynamic radar cruise control system while towing.
Dynamic radar cruise control with road sign assist function (w/ Dynamic Radar Cruise Control with Road Sign Assist Function)
This function can be enabled/disabled via the customization setting in the multi-information display.
This function uses the speed limit information recognized by the road sign assist system. When the road sign assist system mistakenly recognizes the speed limit information, the speed limit set by the driver in the set vehicle speed is also set to the mistakenly recognized speed. When using this function, make sure to check the actual speed and not overly rely on the system.
If +RES or -SET switch is pressed and held while the function is disabled, the system operates in the same way as a normal dynamic radar cruise control system.
This function can only be used when the dynamic radar cruise control system is set to vehicle-to-vehicle distance control mode.
HANDLING PRECAUTION FOR CAN COMMUNICATION SYSTEM
First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed with troubleshooting.
REPLACEMENT PRECAUTIONS
ECM:
It is necessary to perform initialization after replacing the ECM.
Before replacing the ECM, refer to Service Bulletin.
Millimeter wave radar sensor assembly:
When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle and a DTC may be stored.
When the millimeter wave radar sensor assembly has been replaced with a new one, it is necessary to perform millimeter wave radar sensor assembly adjustment and front radar acceleration sensor calibration, and to clear the vehicle control history.
Forward recognition camera:
When replacing the forward recognition camera, replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle and a DTC may be stored.
When the forward recognition camera is replaced with a new one or the windshield glass is replaced or removed/installed, make sure to perform beam axis adjustment for the forward recognition camera and clear the vehicle control history for each system.
Forward recognition camera adjustment can be performed by using either One Time Recognition or Sequential Recognition.
One Time Recognition: Click hereEngine / Hybrid System>CRUISE CONTROL>FRONT CAMERA>ADJUSTMENT (ONE TIME RECOGNITION)201906,202208,_51,_078884,_0384728,RM100000001IUI2,202208,999999,_51,_078884,_0384728,RM1000000024I1G,
Sequential Recognition: Click hereEngine / Hybrid System>CRUISE CONTROL>FRONT CAMERA>ADJUSTMENT (SEQUENTIAL RECOGNITION)201906,202208,_51,_078884,_0384728,RM100000001IULT,202208,999999,_51,_078884,_0384728,RM1000000024I1H,
Skid control ECU (brake actuator assembly):
After replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information.