Hyundai Santa Fe: Front Radar System / Front Radar Unit. Repair procedures

Hyundai Santa Fe (TM) 2019-2024 Service Manual / Advanced Driver Assistance System (ADAS) / Front Radar System / Front Radar Unit. Repair procedures

Inspection
Inspection procedure for vehicle with Forward Collision-Avoidance Assist and Smart Cruise Control system failure
1.
Check the bumper appearance for accident (check the vehicle appearance visually and see bumper replacement history).
→ In case of the vehicle was involved in an accident, there is a high possibility that the FCA radar is out of the original default position.
2.
Check for contamination of the radar sensor cover of the bumper.
→If contaminated, there is a high possibility that the FCA system is deactivated during operation due to the foreign substances.
3.
After turning on the engine, check the FAC warning lamp and DTC.
(Refer to the DTC diagnosis guide.)
Removal
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Remove the front bumper.
(Refer to Body - "Front Bumper")
3.
Disconnect the front radar connector (A).

4.
Loosen the mounting nuts and remove the front radar (A).
Front radar nuts :
9.5 - 10.5 N·m (0.97 - 1.07 kgf·m, 7.0 - 7.7 lb·ft)

Installation
  
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 front radar is clean.
1.
Check the last 2 digits of Lot. No (A) on label at rear side before installing the front radar.
  
The meaning of Lot. No (A) is the vertical deviation angle of front radar inner side.

2.
Install the front radar (A) by tightening the nuts and connect the front radar connector.
Front radar nuts :
9.5 - 10.5 N·m (0.97 - 1.07 kgf·m, 7.0 - 7.7 lb·ft)

3.
If replaced the front radar with a new one, perform variant coding procedure by using the diagnostic tool.

4.
Check and align the front radar mounting angle.
(1)
Perform the "inspection/correction of the front-radar mounting angle" using the diagnostic tool.

(2)
Input 2 digits of value in the code input box, then press "OK"

(3)
Check the vertical angle which is compensated error on diagnostic tool.
  
The result value is final goal vertical angle which is compensated inner error of criteria vertical installation angle -1°.

(4)
Check the front radar vertical angle by using the vertical protractor (tiltmeter).
  
Make sure to perform zero setting before using vertical protractor. (perform this procedure periodically)
Be careful with +/- readings when finding true vertical using vertical protractor.
(5)
Adjust to "target vertical angle" by turning adjusting screw of front radar.
turning clockwise : adjusting (+) angle
turning counterclockwise : adjusting (-) angle
  
There is a chance to be transformed of bracket if adjusting screw with over strength.
Must recheck with vertical protractor if vertical angle is right after adjusting.

Number of adjustment screw rotation
Correction angle
Clockwise
Counter clockwise
0.5
+ 0.5°
- 0.5°
1
+ 1.0°
- 1.0°
1.5
+ 1.5°
- 1.5°
2
+ 2.0°
- 2.0°
2.5
+ 2.5°
- 2.5°
3
+ 3.0°
- 3.0°
3.5
+ 3.5°
- 3.5°
4
+ 4.0°
- 4.0°
4.5
+ 4.5°
- 4.5°
5
+ 5.0°
- 5.0°

(6)
Install the front bumper assembly.
(Refer to Body - "Front Bumper Assembly")
(7)
Perform the front radar inspection/correction procedure by using the SST.
(Refer to Smart Cruise Control (Stop & Go) (SCC) Unit-Radar - "Adjustment")
Adjustment
Front Radar Installation Angle Checking / Adjustment Overview
The front radar detects control subject in front, and recognize distance from the subject, comparing speed and etc. For these reasons the direction of installation has to be on collinear with vehicle. Therefore, installing angle inspection and adjustment have to be done in case of the front radar removed and reinstalled caused by accident or install a new front radar. Accuracy of the front radar cannot be guaranteed if inspection and adjustment have not been done in case of mentioned situation before. Front radar inspection/adjustment have to be done with either stop mode (C1) or drive mode (C2) using by diagnostic tool Perform adjustment procedure with exclusive adjustment reflector (SST) for stop mode (C1).
  
after operating stop mode, the accuracy will be increased if the vehicle has driven more than 10 min.
(drive on straight lane which has metallic reflector.)
Operate adjustment on real road driving (drive on the road that has many metallic fixed reflector such as guard rail) for drive mode. (C2)
  
The cases that front radar installation angle checking/adjustment are needed.
Front radar has been replaced
Front radar has been removed and reinstalled.
Line up failed DTC has been occurred
Failure on front radar detecting and cognition function
failed to detect vehicle in front while functioning
often detecting error of side lane
often detecting error even though any object is not in front
How to Check / Adjust Front Radar Installation Angle - Stop Mode
  
Preparation before the front radar 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 front radar is clean.
  
Perform in an area with minimum clearance of 8m (26.2 ft) front, 4m (13.1 ft) sides, and 2 m (6.6 ft) above the vehicle.
Install the reflector exactly 2.5 m (8.2 ft) away from the Front Radar.
The reflector has to be installed at same place (height and angle) as front radar center.
(If height and angle are different, then adjustment can not be done correctly.)
Remove objects (metal plates, resins, etc.) that may cause electric signal interference from the area where front radar alignment is performed.
Make sure to use exclusive reflector (OK964-J5100)
Be sure that the vehicle is not moved and free from vibration when performing front radar alignment
(getting in/out or opening/closing doors).
IG has to be on when performing front radar alignment. (engine stop condition)
1.
Stop the vehicle horizontally at a flat place.

2.
Mark the center point (B) after measuring the distance on top of wind glass.

3.
Mark the center point of emblem (A).

4.
Install the laser (09964-C1200) to the tripod (09964-C1300).

5.
Place the laser (09964-C1200) at 2.5m (8.2 ft) to the front of the vehicle.

6.
Match the vertical line of laser to (A) and (B) using the laser (09964-C1200).

7.
Mark (C) at 2.5 m (8.2 ft) from (A) in front of the vehicle.
8.
Mark (D) at the place which is 13mm away from (C) to the right in vertical direction.

9.
Remove the laser (09964-C1200) from the tripod (09964-C1300).

10.
Mount the reflector (09964-C1100) onto the tripod (09964-C1300).

11.
Mount the reflector adapter (0K964-J5100) to the reflector (09964-C1100).

12.
Set the reflector horizontal using the leveler (A) which is built in the tripod (09964-C1300).

13.
Align the vertical weight (A) of the reflector (09964-C1100) with the point (D).

14.
Set the height of the reflector adapter (0K964-J5100) to 375 mm (14.76 inch).

15.
Remove the vertical weight from the reflector (09964-C1100).
  
It can be effected to adjustment if the vertical weight is still left.
16.
Check again the front radar 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.
17.
Select C1 (stop mode) to inspect and adjust the front radar installation angle by following procedure on diagnostic tool screen.

How to Check / Adjust Front Radar Installation Angle - Drive Mode
  
After operating stop mode, the accuracy will be increased if the vehicle has driven more than 10 min.
(drive on straight lane which has metallic reflector.)
If stop mode operation can not be done, then use drive mode to proceed front radar adjusting procedure.
  
Preparation before the front radar 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 front radar is clean.
1.
Select C2 (drive mode) to inspect and adjust the front radar installation angle by following procedure on diagnostic tool screen.

2.
In case of front radar inspection/correction failure, check the inspection/correction conditions.

    Front Radar Unit. Schematic diagrams

    ..

    Smart Cruise Control (SCC) Switch. Components and components location

    ..

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