Hyundai Elantra: Front View Camera System / Description and operation
| Description and Operation |
Blcok Diagram
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| This system monitors the driving situations through the radar and the camera. Thus, for a situation out of the sensing range, the system may not normally operate. |
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| The System may be limited when : |
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| The radar sensor or camera is blocked with a foreign object or debris. |
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| The camera lens is contaminated due to tinted filmed or coated windshield, damaged glass, or stuck of foreign matter (sticker, bug, etc.) on the glass. |
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| Inclement weather such as heavy rain or snow obscures the field of view of the radar sensor or camera. |
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| The target in front is too small to be detected |
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| The vehicle in front is an oversize vehicle or trailer that is too big to be detected by the camera recognition system (for example a tractor trailer, etc.). |
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| The camera's field of view is not well illuminated (either too dark or too much reflection or too much backlight that obscures the field of view) |
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| The vehicle in front does not have their rear lights ON or their rear lights are located in an unsual location (modified). |
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| The windshield glass is fogged up and the clear view of the road has been obstructed. 
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System Function
The front camera (FR_CMR) supports the following functions by using the data recognized by the front camera (lane / light source / vehicle / pedestrian / motorcycle), and car signals (CAN communication).
| 1. | Forward Collision-Avoidance Assist (FCA): This driving safety system sends warning to the driver for possible dangers and assists the braking of the vehicle to help avoid collision with any kind of obstacles that are in front of the car while driving. The FCA recognizes the position and the speed of the front obstacles (vehicle / pedestrian / two-wheeled vehicle) using the front camera / forward radar, sends visual / audible warning to the driver when a collision with the front obstacle is expected and helps the driver to avoid the collision by assisting to control the brake. However, the driver must keep an eye on the forward for safety because the front camera / forward radar may not operate normally in certain situations where the obstacles cannot be easily recognized. 
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| 2. | Lane Keeping Assist (LKA): This driving safety system sends warning to the driver for possible dangers and controls the steering wheel when the system judges that the car is off the lane , reducing the risk of getting into an accident while driving. The LKA sends the driver the visual / audible / tactical warning by using the data about lanes, which is obtained by the front camera, the operational status of the turn signal lights, and helps the driver to avoid the collision by assisting to control the steering wheel. However, the front camera may not operate normally in certain situations where the locations or the boundaries of the lanes are hard to be identified. 
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| 3. | Driver Attention Warning (DAW): This system warns the driver to avoid accidents if it judges that the driver is driving inadvertently. The DAW sends the driver visual and audible warnings if an inadvertent driving is detected by analyzing the driving pattern of the driver in consideration of the lane condition recognized by the front camera and the data on the speed / steering wheel angle / brake operation of the vehicle. However, the front camera may not operate normally in certain situations where the camera fails to obtain data about surroundings. 
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| 4. | High Beam Assist (HBA): This system controls the operation of high beam to improve sight distance as much as possible by minimizing glare from other vehicles when driving at night or with no or less light. By using a forward camera, the HBA identifies where the light comes from, (whether it is from a vehicle in the front / across or a street). When there is light, the system turns the high beam OFF and when there is no light, it turns the high beam ON. However, the front camera may not operate normally in certain situations where the camera fails to obtain data about surroundings. 
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| 5. | Lane Following Assist (LFA): This system is designed to improve passenger convenience by controlling the steering wheel to keep the vehicle at the center of the lane, helping to reduce operating load while driving. The LFA helps control the steering wheel to keep the car at the center of the lane by using the data about lanes and road boundaries obtained by the front camera. However, the driver must keep an eye on the forward for safety because the system may not operate normally in certain situations where the front camera fails to obtain information about front view. |
| 6. | Highway Driver Assist (HDA): This system is designed to improve passenger convenience by controlling the steering wheel and the vehicle speed in order to maintain the speed of the vehicle that is set by the driver, a certain distance from the front car and keep the vehicle at the center. This helps reduce operating load while driving a highway or a driveway. By using the navigation data, the HAD determines whether the vehicle is on an expressway or a driveway. With this information, the system controls the steering wheel and reduces or increases the speed of the vehicle, while following the speed limit set by road or the driver and keeping the safe distance from the car in front or at the center by considering data about speed limit and lane conditions, which are obtained by the front camera and forward radar. The system ends with the push of the cancel switch or brake. The HAD sends visual and audible warnings to the driver. It ends its operation, if it judges that the driver hasn’t controlled the wheel for certain amount of time. |
System operation
Front camera operating speed by each system :
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| Warning [km/h]
| FULL Braking [km/h]
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Camera FCA
| Stationary
| 10 - 180
| 10 - 60
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Moving vehicle
| 30 - 180
| 30 - 60
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Pedestrians
| 10 - 60
| 10 - 60
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System
| Start [km/h]
| Stop [km/h]
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MIN
| MAX
| MIN
| MAX
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LKA
| 60
| 175
| 55
| 180
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DAW
| -
| 175
| -
| 180
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HBA
| 40
| 175
| 30
| 180
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LFA
| -
| 145
| -
| 151
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HDA
| -
| 145
| -
| 151
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The operating conditions of the front camera are as follows when the USM of the following system is ON and the required operating speed is satisfied.
| 1. | FCA, Forward Collision-Avoidance Assist : | 1) | ESC (Electronic Stability Control unit) must be ON |
| 2) | It operates when a collision with another vehicle or a pedestrian in front is expected. |
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| 2. | LKA, Lane Keeping Assist : | 1) | The lane must be clearly identified and both lanes from the opposing directions must be detected. |
| 2) | The driver should keep its hands on the steering wheel. The system is released if the steering wheel assist system ignores the force of the steering wheel. |
| 3) | The system starts operating when the lane change is made arbitrarily while the turn signal lights and emergency light switch are being turned OFF. |
| 4) | If the vehicle exceeds a predetermined width of the vehicle, the system judges that the vehicle moves from one lane to another, and this ends the system. |
| 5) | The LKA may not work properly in the following conditions when • The car drives on a steep curve •There is a sudden braking or a sudden lane change. • The ESC / VSM is in operation • The width of the lane is too wide or too narrow. |
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| 3. | DAW, Driver Attention Warning : Inadvertent driving warning | 1) | The DAW (Driver Attention Warning ) system may not work properly in the following conditions when |
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| The car frequently and deliberately crosses over the lanes or is driven aggressively. |
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| The car has to drive on an extremely curving road or uneven surface. |
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| If the vehicle is controlled by other lane keeping systems such as ADAS. |
Front Vehicle Departure Warning | 1) | When the front vehicle starts running, the system displays a message on the instrument panel along with a beep. |
| 2) | The Front Vehicle Departure Warning may not work properly in the following conditions when |
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| Pedestrians or bicycles are in front. |
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| Other vehicle cuts the line. |
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| The vehicle standing at the front makes a sudden start or U turn. |
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| The vehicle is pulled over at a speed bump, ramp, shoulder, rest area, parking lot. |
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| The vehicle stops running while making the right turn or driving on the curved road. |
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| The front road condition is unpredictable (ex, a decrease of the number of driving lanes). |
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| 4. | HBA, High Beam Assist : | 1) | To activate the system, turn the light switch to the 'AUTO' position and slide it towards the instrument panel (High beam : ON). |
| 2) | The following explains the detailed operation of the High Beam Assist (HBA) System which is controlled by the switch. When the high beam switch is pushed to the instrument cluster, the operation of the high beam switches to a 'Constant Turned ON' mode and the system ends. When the light switch is pulled without the high beam being turned OFF, the high beam is turned ON without ending the HBA system. (When hands are released, the switch moves to the center and turns the high beam OFF.) When the light switch is pulled with the high beam being turned ON by the HBA, the high beam is turned OFF and the system ends. The switch of the headlight switch from "Auto" to the "Headlight" turns the high beam OFF and ends the system. |
| 3) | The high beam is automatically turned OFF when any of the following conditions occurs while the headlight is turned ON by the HBA.HBA |
| 4) | The system detects the headlight of the other approaching car or the tail light of the front car. |
| 5) | The system detects the headlight or tail light of bicycles or motorbikes. |
| 6) | The light condition is bright enough not to turn the headlight ON. |
| 7) | There is street light or other light in front. |
| 8) | The light switch is not in the AUTO (auto light) position. |
| 9) | The USM is OFF or does not meet the required operating speed. |
| 10) | The system may not operate in a day time even though all conditions for HBA operation are met. |
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| 5. | LFA, Lane Following Assist : | 1) | Press the button of the LFA(Lane Following Assist) system on the steering wheel remote to activate the system. |
| 2) | The system starts operating when the vehicle is located inside the lane, the lanes of both directions are recognized and there is no sudden turn of the steering wheel by the driver. |
| 3) | If the lane is not recognized, the system assists the steering wheel control at a limited degree by adapting to different conditions depending on the presence of the other vehicle in front and the running state of the vehicle ahead. |
| 4) | A hands-off warning occurs when the driver continues to drive the vehicle with his hands-off. The system ends when the driver continues to ignore the warning. |
| 5) | The LFA system may not work properly in the following conditions, when •The vehicle drives on an extremely curving road. • The vehicle stops abruptly or makes a sudden lane change. • The ESC / VSM is in operation. The width of the lane is too wide or too narrow. |
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| 6. | HDA, Highway Driver Assist : | 1) | The system operates automatically when the car is running on a highway and the Smart Cruise Control is ON. |
| 2) | The system operates automatically when the car enters the main highway with having Smart Cruise Control ON. |
| 3) | The system ends when the button for LFA(Lane Following Assist) is pressed while the HAD is in operation. |
| 4) | A hands-off warning occurs when the driver continues to drive the vehicle with his hands-off. The system ends when the driver continues to ignore the warning. |
Automatic speed setting mode | 1) | If the HDA operating condition is satisfied and the set-speed by the driver matches the speed limit of the highway, the vehicle enters the automatic speed setting mode. (This sets the sign of 'Set speed' and 'AUTO' mark in green and makes a beep) |
| 2) | In the section where the speed limit of the highway changes, the setting speed is automatically altered to follow the new speed limit with the beep. |
| 3) | If the driver arbitrarily changes the set speed, the 'AUTO' mark disappears and the automatic speed setting mode is canceled. |
| 4) | The system may not work properly in the following conditions, when • The map data in the car navigation is not updated. The car gets out of the main highway such as IC or JC. Or there is an open-type toll gate. • The navigation experiences overload by performing multiple functions at once and failed to receive the data about map. • The map data is different from the actual road conditions or there is no incoming GPS signal. • The driver does not follow the guided route by the navigation system, and the system fails to automatically search the alternate routes. |
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Components Location1. Front view camera (FR_CMR)2. LKA ON/OFF switch (Remote control switch)3. LKA ON/OFF switch4. Cluster5. AVN head unit..
Other information:
Components and components location
Components1. Driveshaft (LH)2. Dynamic damper3. Driveshaft (RH)
Repair procedures
Removal1.Loosen the wheel nuts slightly.Raise the vehicle, and make sure it is securely supported.2.Remove the front wheel and tire (A) from the front hub. Tightening torque : 107.9 - 127.5 N.m (11.0 - 13.0 kgf.m, 79.6 - 94.0 lb-ft)
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Repair procedures
Inspection1.Troubleshooting for Speaker(1)Basic inspection of speakerInspect the sound from speaker after verifying that the speaker mounting screws is removed and the wiring connector is connected precisely to remove vibration transmitted from body trims and surrounding parts.(2)Case Troubleshooting No Case ..
Components and components location
