This mode employs a radar sensor to detect the presence of vehicles up to approximately 328 ft. (100 m) ahead, determines the current vehicle-to-vehicle following distance, and operates to maintain a suitable following distance from the vehicle ahead.
Note that vehicle-to-vehicle distance will close in when traveling on long downhill slopes.

Approach warning warns you when the system cannot decelerate sufficiently to prevent your vehicle from closing in on the vehicle ahead.
When the vehicle ahead of you stops, your vehicle will also stop (vehicle is stopped by system control). After the vehicle ahead starts off, pushing the cruise control lever up or depressing the accelerator pedal will resume follow- up cruising.
Summary of functions
Setting the vehicle speed (vehicle-to-vehicle distance control mode)Toyota CH-R Service Manual > Charging System: Noise Occurs from V-ribbed Belt or Generator Assembly
PROCEDURE
1.
CONFIRM PROBLEM SYMPTOM
(a) Confirm the problem symptom.
Symptom
Proceed to
Noise occurs from V-ribbed belt.
A
Noise occurs from generator assembly.
B
B
...
Toyota CH-R Service Manual > Safety Connect System: Health Check
HEALTH CHECK
HEALTH CHECK
Health Check provides an overall view of vehicle status including telematics.
Health Check will provide DCM (Telematics Transceiver) software version, PRL version,
and applicable DTCs and fault codes related to telematics.
(a) Connect the Techstream to the DLC3.
(b) ...