Kia Niro: Smart Cruise Control System / Smart Cruise Control (SCC) Unit-Radar Repair procedures

Kia Niro 2017 (DE HEV) Service Manual / Engine Electrical System / Smart Cruise Control System / Smart Cruise Control (SCC) Unit-Radar Repair procedures


Remove the front bumper.

(Refer to Body - "Front Bumper Cover")


Disconnect the SCC radar & unit connector (A).


Remove the SCC radar & ECU (B) after loosening the mounting bolts.


Install in the reverse order of removal.

Smart Cruise Control (SCC) Radar Sensor Alignment

Smart Cruise Control (SCC) unit detects a forward vehicle and then recognizes the distance to the forward vehicle and the relative speed using the built-in radar sensor. In order for the radar sensor to operate correctly, it must be properly aligned parallel to the driving direction of the vehicle. So, the radar sensor alignment procedure must be carried out after the sensor is reinstalled or replaced with new one. If not performing the sensor alignment in the conditions mentioned above, the smart cruise control system may not operate correctly.


The SCC radar sensor alignment is required when:

The SCC unit is reinstalled or replaced with a new one.

The radar sensor or the surrounding parts are impacted by a collision.

The sensor does not recognize a forward vehicle.

The Steering Angle Sensor (SAS) is replaced or adjusted.


Preparation before the SCC radar sensor alignment:

Put the vehicle on the level ground.

Take out heavy luggage from the vehicles’ seats or trunk.

Set all tires according to the specified pressure.

Check wheel alignment.

Check that the front surface of the SCC unit is clean.

Radar sensor should be aligned in both vertical and lateral direction. Vertical alignment can performed by using the SST (0K964-3T000) and lateral alignment can be performed automatically by driving on a road.


Park the vehicle on a level ground.


Remove the front bumper.

(Refer to Body - "Front Bumper")


Check the vertical alignment of the radar sensor using the SST 0K964-3T000 (A).

If the vertical alignment is out of the the tolerance, turn the adjustment screw (B) until the alignment is within the tolerance.

Tolerance: ±1.25⁰ or less


Install the front bumper.

(Refer to Body - "Front Bumper")


To perform the lateral alignment, connect the GDS/KDS with the engine started and select the “SCC Alignment”.


Be sure to erase DTC before performing the lateral alignment.


Select “Running Mode” to start sensor alignment.


Drive the vehicle and check that the yellow warning light on the cluster is turned ON and then OFF.


The lateral alignment takes about 5 to 15 minutes generally but it can be shorten or extended depending on the road condition or driving condition.

Road or driving conditions for shortening the alignment :

Driving at more than 65 km/h (40.4 mph)

Driving on a road without curve and slope

Driving on a thick and wide paved road

Driving on a road where there are repetitive and fixed targets (metal materials such as street lights or guard rails)

Driving on a dry road without rain or snow

Road or driving conditions that can interrupt the alignment process

Driving a road with the sharp curve where the radius is within 100m (328.0ft)

Driving at a lower speed than suggested above or during a stop due to a red light

Driving in a tunnel or under an overpass

Turning the steering wheel excessively to the left or right or changing the lane suddenly


Be sure to follow the below safety guidelines while driving the vehicle for the lateral alignment :

Observe a regulation speed

Do not drive too fast for shortening the sensor alignment. Drive safely considering the road condition and traffic situation.

Do not stare the GDS/KDS screen or operate the GDS/KDS while driving. Only while stopping, the GDS/KDS should be operated.


If the lateral alignment is not completed successfully, check the alignment using the GDS/KDS. If the value is out of ±3⁰, check that the back beam or bracket where the SCC unit is mounted are in a good condition and then if there is no problems, replace the SCC unit with new one. After replacing the SCC unit, repeat the alignment procedure described above.

AEB Variant Coding Procedure

As the advanced smart cruise control ECU is integrated with the AEB unit, perform "AEB variant coding procedure" when replacing the advanced smart cruise control ECU.

(Refer to Brake System - "Autonomous Emergency Brake (AEB) System

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