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Home >> Subaru >> 2022 >> WRX Premium, Standard Trans >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> SUBARU Eyesight System (Driver Assist) (Diagnostics) >> Diagnostics with Phenomenon >> Adaptive Cruise Control/Constant Speed Cruise Control >> CHECK LIST (Adaptive Cruise Control/Conventional Cruise Control)

CHECK LIST (Adaptive Cruise Control/Conventional Cruise Control)

Item name Yes/No
1 Check that the current status applies to the condition that "Adaptive Cruise Control/Conventional Cruise Control" cannot operate or is unintentionally canceled.
1 Driver's, passenger's or rear door was open, or was opened while setting was in effect. Yes No
2 Driver's seat belt was not fastened, or was unfastened while setting was in effect. Yes No
3 Electronic parking brake was operating, or was operated while setting was in effect. Yes No
4 Select lever was in other than D or M, or was shifted to other than D or M while setting was in effect. Yes No
5 5-1. Upon setting up ACC while the vehicle was parked, brake pedal was not fully depressed. Yes No
5-2. Brake was being operated, or was operated while setting was in effect. Yes No
6 (ACC only) EyeSight was in a temporary stop condition, or came to a temporary stop condition while setting was in effect. Yes No
7 Vehicle was driving on a steep hill, or came to a steep hill while setting was in effect. Yes No
8 Steering wheel was at fully turned position, or was turned fully while setting was in effect. Yes No
9 9-1. Meter vehicle speed was over approx. 145 km/h (90 MPH) or exceeded it
Upper vehicle speed limit varies depending on destinations
Yes No
9-2. (CC) Meter vehicle speed was not over approx. 30 km/h (19 MPH), or became below approx. 25 km/h (16 MPH) while setting was in effect. Yes No
10 Engine speed was over approx. 6, 000 rpm. Yes No
11 VDC and TCS functions were operating, or VDC and TCS functions operated while setting was in effect. Yes No
12 VDC function was OFF, or turned OFF while setting was in effect. Yes No
13 EyeSight was in a function stop condition, or came to a function stop condition while setting was in effect. Yes No
14 Pre-collision brake was operating, or pre-collision brake operated while setting was in effect. Yes No
15 (When vehicle was not decelerating while setting was in effect) Accelerator pedal was operated while setting was in effect. Yes No
16 (When setting is not possible) Main SW was pressed and main ON was not achieved.
Without main ON condition, ACC/CC cannot be set.
Yes No
17 (When adaptive driving is not possible while setting is in effect) Is it in CC mode?
(For Europe and Australia only) Is it in ISA/MSA mode?
When in CC mode or in ISA/MSA mode, vehicle does not follow preceding vehicle.
Yes No
18 (When vehicle cannot drive at a constant speed while setting is in effect) When in ACC mode.

(For Europe and Australia only) When in ISA/MSA mode.


(In ACC mode) When vehicle is following preceding vehicle, or (in ISA/MSA mode) when vehicle speed is below set speed, vehicle does not drive at a constant speed.
Yes No
19 (ACC/CC is unintentionally canceled) ACC main SW was pressed.
(For Europe and Australia only) ISA/MSA SW was pressed.
Yes No
20 (Getting unintentionally canceled) Half-stop condition continued for 10 minutes. Yes No
21 (Getting unintentionally canceled) Accelerator pedal was depressed for a long time. Yes No
22 Electronic parking brake was operated continuously, or electronic parking brake SW was pressed or pulled continuously during driving. Yes No
23 (Vehicle with X-mode only) X-mode was operating, or was operated while setting was in effect. Yes No
24 (For Europe and Australia only) (During setting in effect) ISA/MSA main SW was pressed. Yes No
25 GPF waning light was on, or illuminated while setting was in effect. Yes No
26 Fuel level warning light was on, or illuminated while setting was in effect. Yes No
27 (Vehicle with cancel SW only) (During setting in effect) Cancel SW was pressed. Yes No
2 Check that the current status applies to the condition that the use of adaptive cruise control is not desired.
1 Tire pressure is not correct. Yes No
2 The vehicle is equipped with the temporary spare tire. Yes No
3 The vehicle is equipped with worn tire or tires with excessive wear difference. Yes No
4 The vehicle is equipped with the tires out of specification. Yes No
5 The suspension has been modified. Yes No
6 The vehicle is equipped with the tire chain. Yes No
7 Headlight is dirty or the optical axis is deviated.
(The vehicle cannot correctly emit the headlight beam against the object and recognize it.)
Yes No
8 The driving of own vehicle is unstable due to an accident or failure. Yes No
9 The brake warning light illuminates. Yes No
10 Vehicle is tilted by the heavy load. Yes No
11 Passenger capacity is exceeded. Yes No
12 The vehicle is towing the trailer or other vehicle. Yes No
13 The vehicle drives on the general road (other than limited highway).
(Depending on the road environment (complicated roads etc.), the vehicle may not be able to drive according to the traffic condition, which may lead to the traffic accident.)
Yes No
14 The vehicle drives on the sharp bend. Yes No
15 The vehicle drives on the slippery roads such as icy road or snow-covered road.
(Tires can spin, losing the vehicle control.)
Yes No
16 The vehicle drives under the traffic condition that the certain vehicle distance is difficult to be maintained due to frequent acceleration and deceleration.
(The vehicle may not be able to drive according to the traffic condition.)
Yes No
17 There is a steep downhill.
(The vehicle may drive at higher speed than the set vehicle speed.)
Yes No
18 The vehicle performs adaptive driving while recognizing the preceding vehicle on the steep downhills.
(Brake can be overheated.)
Yes No
19 The vehicle drives on the road with repeated steep uphills and downhills or crossover.
(The vehicle may not be able to recognize the preceding vehicle or may recognize the road surface, and appropriate control may not be performed.)
Yes No
20 The vehicle is entering the interchange, service area, parking area, junction or tollgate.
(The vehicle may not be able to recognize the preceding vehicle.)
Yes No
21 When the surrounding brightness (such as inlet and outlet of a tunnel) suddenly changes. Yes No
22 There are water, snow or sandy dust raised by the preceding vehicle or oncoming vehicle, or sand or smoke blown in the wind, or moisture in front of own vehicle.
(The vehicle may not be able to recognize the preceding vehicle or may recognize the water, and appropriate control may not be performed.)
Yes No
23 The windshield glass is covered with fog, snow, dirt, frost or sandy dust. Yes No
24 The raindrops, water drops or dirt on the windshield glass are not wiped off sufficiently.
(The vehicle may not be able to recognize the preceding vehicle, and appropriate control may not be performed.)
Yes No
25 Canoes etc. loaded on the roof block the visibility of the stereo camera. Yes No
3 Check that the current status applies to the condition or the object that is hard to be recognized by the stereo camera.
1 That was a vehicle with large speed difference (low-speed driving vehicle, stopping vehicle, oncoming vehicle). Yes No
2 That was a cutting-in vehicle. Yes No
3 That was a motorcycle, bicycle, pedestrian or animal, etc. Yes No
4 It was dim in the evening or in the morning. Yes No
5 The vehicle drove in bad weather conditions, such as heavy rain, snowfall, snowstorm, or dense fog, that a preceding vehicle was difficult to be recognized.
(The vehicle may not be able to recognize the preceding vehicle, and appropriate control may not be performed.)
Yes No
6 The headlight did not illuminate during nighttime hours or inside the tunnel. Yes No
7 The tail light of the preceding vehicle did not illuminate during nighttime hours or inside the tunnel. Yes No
8 The vehicle was exposed to the intense light (backlight such as sunlight or headlight high-beam light) from the front of the vehicle. Yes No
9 The rearmost surface of the preceding vehicle was small, low or uneven.
That was a truck equipped with an unloaded platform without gate, a vehicle that the luggage was protruding from the rear end of the vehicle, a vehicle of special shape (carrier car, side car, etc.) or a vehicle with low vehicle height.
Yes No
10 There was an object extremely close to the bumper of the own vehicle. Yes No
4 Check that the current status applies to the driving condition that the preceding vehicle cannot be recognized or the vehicle on the next lane or the object on the roadside may be recognized by mistake.
1 The vehicle began adaptive cruise control from the condition that the vehicle distance was short immediately after the preceding vehicle was cut in. Yes No
2 The vehicle drives on the curve, outlet and inlet of the curve, or the road with many curves in succession.
(Recognition may not be performed properly, because the preceding vehicle is out of recognition area.)
Yes No
3 The position against the preceding vehicle deviated laterally. Yes No
4 There were some objects just near the road side. Yes No
5 The speed difference against the preceding vehicle was large. Yes No
6 Other vehicle cut ahead of the own vehicle. Yes No
7 The vehicle distance was extremely short. Yes No
8 The own vehicle swayed in the vehicle lane. Yes No
9 The road surface was uneven due to roll or unpaved track. Yes No
10 The vehicle drove on the narrow lane because of the lane closure or construction work. Yes No
11 The driving of own vehicle was unstable due to an accident or failure. Yes No
12 The own vehicle was loaded with the extremely heavy load in the luggage compartment or on the rear seat. Yes No
13 Turn signal indicator was operated.
(Depending on the driving conditions, the vehicle driving in the lane of the same side as the turn signal indicator turned on may be recognized as a preceding vehicle.)
Yes No
5 Check that the current status applies to the condition that brake force may become poor.
1 The vehicle status (loading amount, passenger, etc.) was inappropriate. Yes No
2 The road surface was very steep, slippery, sharp turn, or uneven. Yes No
3 The service maintenance condition of the vehicle (brake system, tire wear, tire pressure, spare tire, etc.) was inappropriate. Yes No
4 The brake was cold at low ambient temperature or immediately after the driving had started. Yes No
5 The symptom occurred between immediately after engine started and after a while the vehicle started driving. (Completion of warming up operation can be used as an indication.) Yes No
6 The brake force becomes poor due to the overheating of the brake on the downhills. Yes No
7 The brake force becomes poor because of the wet brake after driving onto the puddle or washing the vehicle. Yes No
6 Check that the current status applies to the condition that the alarm for requiring more brake pedal force does not sound even in a short vehicle distance.
1 The speed difference between own vehicle and preceding vehicle (when the vehicle speed of the own vehicle was approximately the same as that of the preceding vehicle) was small. Yes No
2 The vehicle speed of the preceding vehicle was faster than that of the own vehicle (when the vehicle distance was getting longer). Yes No
3 Other vehicle cut in extremely close to the own vehicle. Yes No
4 The preceding vehicle decelerated abruptly. Yes No
5 There are many continuous uphills and downhills. Yes No