Driver Assistance System (Ldw & Ldp): Overview Infiniti QX80 I

LANE DEPARTURE WARNING (LDW) SYSTEM: Component Description

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LANE DEPARTURE PREVENTION (LDP) SYSTEM: Component Description

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FUNCTION DESCRIPTION

1. Lane Departure Warning (LDW) system provides a lane departure warning function when the vehicle is driven at speeds of approximately 70 km/h (45 MPH) or more.
2. When the vehicle approaches either the left or the right side of the traveling lane, a warning will sound and the lane departure warning lamp (yellow) on the combination meter will blink to alert the driver.
3. The warning does not occur during turn signal operation (Lane change side).
4. The warning function will stop when the vehicle returns inside of the lane markers.

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When the vehicle approaches the right lane marker, the driver is alerted by the buzzer and the blinking of lane departure warning lamp (yellow).

OPERATION DESCRIPTION

1. When the system is turned ON by operating the warning systems switch, ADAS control unit turns ON the warning systems ON indicator.
2. Lane camera unit monitors lane markers of the traveling lane. It transmits the detected lane condition signal to ADAS control unit via ITS communication.
3. When judging from a lane marker detection signal that the vehicle is approaching the lane marker, the ADAS control unit controls the following item to alert the driver. Activates warning buzzer ADAS control unit transmits a lane departure warning lamp signal to combination meter via CAN communication and turns ON/OFF the lane departure warning lamp (yellow).

OPERATING CONDITION

1. Warning systems ON indicator: ON
2. Vehicle speed: approximately 70 km/h (45 MPH) or more
3. Turn indicator signal: After 2 seconds or more from turned OFF

Note. When the LDW system setting on the navigation screen is ON. After the operating conditions of warning are satisfied, the warning continues until the vehicle speed reaches approximately 60 km/h (40 MPH) LDP ON indicator lamp is OFF The LDW system may not function properly, depending on the situation. Refer to " PRECAUTIONS FOR LANE DEPARTURE WARNING/LANE DEPARTURE PREVENTION "

Bulb Check Action and Fail-safe Indication

Vehicle condition/Driver's operation Warning systems ON indicator Indication on the combination meter Ignition switch OFF --> ON (Bulb check) Approx. 5 sec. ON When DTC is detected (Except "C1B01" and "C1B03") ON Camera aiming is not completed ("C1B01" is detected) NOTE: This is detected while driving the vehicle and the indication remains ON until the ignition switch is turned OFF ON Temporary disabled status at high temperature ("C1B03" is detected) ON When the warning systems switch is pressed (When the settings of LDW system, FCW system, and BSW system on the navigation screen are "OFF") Blink

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1. Lane Departure Prevention (LDP) system provides a lane departure warning and brake control assistance when the vehicle is driven at speeds of approximately 70 km/h (45 MPH) or more.
2. When the vehicle approaches either the left or the right side of the traveling lane, a warning sounds and the lane departure warning lamp (yellow) on the combination meter blinks to alert the driver. Then, the LDP system automatically applies the brakes for a short period of time to help assist the driver to return the vehicle to the center of the traveling lane.
3. Warning and brake control are not performed during turn signal operation (lane change side).
4. The warning and assist functions stop when the vehicle returns to a position inside of the lane marker.

Scheme 111

When the vehicle approaches the right lane marker, the driver is alerted by the buzzer and the blinking of lane departure warning lamp (yellow). Simultaneously, the left brake is controlled independently to generate force toward the direction to recover the vehicle from the lane departure.

1. When the system is turned ON by dynamic driver assistance switch, ADAS control unit transmits LDP ON indicator signal to combination meter via CAN communication.
2. Lane camera unit monitors lane markers of the traveling lane. It transmits the detected lane condition signal to ADAS control unit via ITS communication.
3. When judging from a lane marker detection signal that the vehicle is approaching the lane marker, ADAS control unit controls the following items. Activates warning buzzer. Transmits a lane departure warning lamp signal to combination meter via CAN communication. Calculates necessary yaw moment to transmit a target yaw moment signal to ABS actuator and electric unit (control unit) via CAN communication.
4. When receiving the target yaw moment signal, ABS actuator and electric unit (control unit) controls brake pressure of four wheels, respectively.
5. When receiving the signal from ADAS control unit, combination meter turns ON/OFF the lane departure warning lamp (yellow) and the LDP ON indicator lamp (green).

OPERATING CONDITION

1. LDP ON indicator lamp: ON
2. Vehicle speed: approximately 70 km/h (45 MPH) or more
3. Turn indicator signal: After 2 seconds or more from turned OFF

Note. When the LDP system setting on the navigation screen is ON. After the operating conditions are satisfied, the control continues until the vehicle speed reaches approximately 60 km/h (40 MPH). The LDP system may not function properly, depending on the situation. Refer to " PRECAUTIONS FOR LANE DEPARTURE WARNING/LANE DEPARTURE PREVENTION ".

BULB CHECK ACTION AND FAIL-SAFE INDICATION Vehicle condition/Driver's operation Indication on the combination meter Buzzer Ignition switch OFF --> ON (Bulb check) - When DTC is detected (Except "C1B01" and "C1B03") Beep Camera aiming is not completed ("C1B01" is detected) NOTE: This is detected while driving the vehicle and the indication remains ON until the ignition switch is turned OFF Temporary disabled status at high temperature ("C1B03" is detected) Beep When the dynamic driver assistance switch is pressed (When the settings of LDP system, DCA system and Blind Spot Intervention system on the navigation screen are "OFF")

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DESCRIPTION

The DTC is displayed on the information display by operating the ICC steering switch.

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In general, each customer feels differently about an incident. It is important to fully understand the symptoms or conditions for a customer complaint.

There are many operating conditions that lead to the malfunction. A good grasp of such conditions can make troubleshooting faster and more accurate.

Some conditions may cause the lane departure warning lamp to stay ON.

Utilize a work sheet sample to organize all of the information for troubleshooting.

KEY POINTS

1. WHAT..... System and functions
2. WHEN..... Date, Frequencies
3. WHERE..... Road conditions
4. HOW..... Operating conditions, Symptoms

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1. Perform action test to verify the customer's concern.
2. Perform action test and check the system operation after system diagnosis.

Always adjust the camera aiming after removing and installing or replacing the lane camera unit.

Always adjust the camera aiming after removing and installing or replacing the lane camera unit.

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1. PERFORM SELF-DIAGNOSIS Perform self-diagnosis of ADAS control unit and lane camera unit. Is any DTC detected? Except "C1B01": Perform diagnosis on the detected DTC and repair or replace the applicable item. Refer to " «DTC INDEX»(ref-618102-S37087090242014052700000) " (ICC/ADAS) or " «DTC INDEX»(ref-618102-S34580661482014052700000) " (LANE CAMERA). "C1B01" or no DTC: GO TO 2.
2. PREPARATION BEFORE CAMERA AIMING ADJUSTMENT Perform pre-inspection for diagnosis. Refer to " «INSPECTION PROCEDURE»(ref-618102-S32653411482014052700000) ". Adjust the tire pressure to the specified pressure value. Maintain no-load in vehicle. Check if coolant and engine oil are filled up to correct level and fuel tank is full. Shift the selector lever to "P" position and release the parking brake. Clean the windshield. Completely clear off the instrument panel.: GO TO 3.
3. PREPARATION OF AIMING ADJUSTMENT JIG Prepare the aiming adjustment jig according to the following procedure and the figure. Print out the target mark attached in this service article. Refer to " «WORK PROCEDURE (TARGET MARK SAMPLE)»(ref-618102-S40042467292014052700000) ". Stick a printed target mark on the board with a scotch tape or a piece of double-sided tape. NOTE: Use the board that peripheral area of the target is monochrome such as a white-board. Notice that the cross of the target is horizontal and vertical. Diameter of a target (D): 200 mm (7.87 in) Height of a target center (H): 1450 mm (57.09 in) Width between a right target center from a left target center (W): 600 mm (23.62 in): Go to " «WORK PROCEDURE (TARGET SETTING)»(ref-618102-S25100021352014052700000) ".

ADAS control unit judges the gear position based on the following signals.

1. Current gear position signal transmitted from TCM via CAN communication.
2. Value of gear ratio calculated from input speed signal transmitted from TCM via CAN communication.
3. Value of gear ratio calculated from the vehicle speed signal transmitted from ABS actuator and electric unit (control unit) via CAN communication.

ADAS CONTROL UNIT: Description

CAN controller controls the communication of CAN communication signal and ITS communication signal, and the error detection.

LANE CAMERA UNIT: Description

CAN controller controls the communication of ITS communication signal and the error detection.

The lane departure warning lamp in the combination meter does not turn ON when turning on the ignition switch

The LDP ON indicator lamp in the combination meter does not turn ON when turning on the ignition switch Diagnosis Procedure

1. CHECK LDP ON INDICATOR LAMP Check that "LDP ON IND" operate normally in "ACTIVE TEST" of "ICC/ADAS". Check if the LDP ON indicator lamp illuminates when operates each test item. Is the inspection result normal? YES: GO TO 4 . NO: GO TO 2.
2. CHECK COMBINATION METER Turn the ignition switch from OFF to ON to check that "LDP IND" included in "DATA MONITOR" in "METER/M&A" operates normally. Is the inspection result normal? YES: Replace the combination meter. Refer to " «REMOVAL AND INSTALLATION»(ref-618059-S31252661602014052700000) ". NO: GO TO 3.
3. CHECK SELF-DIAGNOSIS RESULTS OF COMBINATION METER Perform "All DTC Reading" with CONSULT. Check if the DTC is detected in self-diagnosis results of "METER/M&A" Refer to " «DTC INDEX»(ref-618059-S29078817832014052700000) ". Is any DTC detected? YES: Repair or replace malfunctioning parts. NO: GO TO 4.
4. CHECK SELF-DIAGNOSIS RESULTS OF ADAS CONTROL UNIT Check if the DTC is detected in self-diagnosis results of "ICC/ADAS" Refer to " «DTC INDEX»(ref-618102-S37087090242014052700000) ". Is any DTC detected? YES: Repair or replace malfunctioning parts. NO: Replace the ADAS control unit. Refer to " «REMOVAL AND INSTALLATION»(ref-618063-S28564450442014052700000) ".

The warning of Lane Departure Warning (LDW) and Lane Departure Prevention (LDP) and the yaw moment control are activated during the use of a turn signal.

Note. For the operational conditions of Lane Departure Warning (LDW) and Lane Departure Prevention (LDP), refer to the following descriptions.

1. LDW: " «LANE DEPARTURE WARNING (LDW) SYSTEM: SYSTEM DESCRIPTION»(ref-618102-S34953333632014052700000) "
2. LDP: " «LANE DEPARTURE PREVENTION (LDP) SYSTEM: SYSTEM DESCRIPTION»(ref-618102-S05865313352014052700000) "

1. LDW system setting is not selectable on the navigation screen.
2. LDP system setting is not selectable on the navigation screen. NOTE: When the ignition switch is in ACC position, LDW or LDP system settings cannot be changed. "Lane Departure Warning" or "Lane Departure Prevention" is not indicated on the navigation screen. The switching between ON and OFF cannot be performed by operating the navigation system. The item of "Lane Departure Warning" or "Lane Departure Prevention" on the navigation screen is not active.
3. After turning ON the ignition switch or starting the engine, LDW or LDP settings of the navigation system cannot be selected for several tens of seconds under the following conditions: After replacing AV control unit. After erasing connection history of the navigation system. After erasing self-diagnosis results of AV control unit.
4. The LDW or LDP system setting differs from the one set at the previous driving. NOTE: Turn OFF the ignition switch and wait for 5 seconds or more.

See also:
• DTC INDEX