Kia Sedona: Smart Cruise Control Unit Repair procedures

Third generation YP (2014-2024) / Kia Sedona YP Service Manual / Engine Electrical System / Smart Cruise Control System / Smart Cruise Control Unit Repair procedures

Removal

1.	Remove the bumper. (Refer to Body - "Front Bumper")

2.	Disconnect the smart cruise control unit connector.

3.	Remove the smart cruise control unit assembly (A) from vehicle after loosening mounting bolts (B).

Installation

1.	Install in the reverse order of removal.

2.	Align the smart cruise control sensor. (Refer to Engine Electrical System - "Smart Cruise Control(SCC) Alignment")

3.	Install the bumper cover. (Refer to Body - "Front Bumper Cover")

Smart Cruise Control (SCC) 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 did not detect a foregoing vehicle.

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

The sensor can not recognize a vehicle ahead:

•	Place the vehicle on a 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.

Smart Cruise Control (SCC) Radar Alignment

Stop the vehicle on a level ground.

•	Adjustment may not be accurate if the installation surface height, and angles of the vehicle and reflector are different.

•	Perform in an area with minimum clearance of 8m front, 4m sides, and 1.2m above the vehicle.

•	Remove heavy objects from inside of the vehicle (seating area and trunk).

•	Ensure that all tires are filled with spec air pressure.

•	Remove objects (metal plates, resins, etc.) that may cause electric signal interference from the area where sensor alignment is performed.

•	Be sure that the vehicle is firmly fixed to ground free from vibration when performing sensor alignment (getting in/out or opening/closing doors).

•	Check that radiator grill and sensor cover are not dirty.

•	Check that the wheel alignment is normal.

•	Do not turn OFF the power when performing sensor alignment.

•	Power supplied to the radar sensor must be between 9V~16V.

•	Temperature in the area where sensor alignment is performed must be between -30~60°C.

2.	Mark the center point of emblem (A) and the center point on top of wind glass (B).

3.	Connect the SCC Calibration Laser (SST No. : 09964-C1200) to the tripod (SST No. : 09964-C1300).

4.	Match the vertical line of laser to (A) and (B) using the SCC calibration laser pointer.

5.	Mark (C) located in 2.5~4.2 m (98.4 ~ 165.4 inch) from (A) in front of the vehicle.

6.	Mark (D) at the place which is 414 mm (16.3 inch) away from (C) to the left in vertical direction.

7.	Disconnect the SCC Calibration Laser (SST No. : 09964-C1200) from the tripod (SST No. : 09964-C1300).

8.	Connect the reflector (SST No. : 09964-C1100) to the tripod (SST No. : 09964-C1300) and set the reflector center height to 394 mm.

Set the reflector horizontal using the leveler which is built in the tripod (SST No. : 09964-C1300).

Balance the level so that the bubble in the level is set between the spec lines.

10.

Install the reflector to match the weight (A) with the point (B).

Visually check that the reflecting side of the reflector is levelled with the front of the vehicle.

11.

Check again the radar sensor and the surface of front bumper for the following items with the eyes.

•	Make sure that there is no debris, or reflecting object on the surface of the radar.

•	Make sure that there is no debris, or reflecting object on the radiator grill.

12.

Connect the GDS to the DLC of the vehicle and start sensor alignment.

When the engine is running, the vibration may cause inaccurate sensor alignment, so perform sensor alignment in IG ON mode.

13.	After correctly selecting the vehicle model, select "SCC Alignment" from the auxiliary functions in GDS Menu.

14.	Perform sensor alignment by following the directions shown on the GDS monitor.

15.	In case of sensor alignment failure, check the alignment conditions. Turn the ignition key OFF, then reperform the sensor alignment procedure.

Inspection

Inspection procedures for smart cruise control system failure:

1.	Check the bumper appearance and accident history (visual appearance of the vehicle, maintenance and bumper replacement history). → If the vehicle has been crashed, SCC mounting part is highly likely to be twisted.

2.	Check whether the radar sensor cover of the bumper is dirty. → If the cover is dirty, SCC is highly likely to be released by the foreign substance during operation.

3.	After starting engine, check SCC warning message on the cluster and DTC code. (Refer to DTC guide.)

4.	After starting engine, stop for more than 5 seconds. → If system initialization (yaw rate sensor offset compensation) is not completed, SCC will not operate.

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Kia Sedona: Smart Cruise Control Unit Repair procedures

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