Home/Nissan/Altima/Nissan Altima L33 (2012-2015)/Repair manual/Collision/avoidance/Driver Assistance System (Mod) (Sedan): Overview
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Driver Assistance System (Mod) (Sedan): Overview Nissan Altima L33

Collision/avoidance 3 illustrations ~721 words

Component Description

ComponentDescription
ITS control unitBeing connected with rear view camera via ITS communication, receives vehicle detection signal and transmits Moving Object Detection indicator signal and Moving Object Detection indicator dimmer signal to rear view camera Being connected with rear view camera unit via ITS communication, receives detected rear condition signal Receives steering angle sensor signal from steering angle sensor via CAN communication Judges a Moving Object Detection indicator ON/OFF state and an approach state to the rear proximity of the vehicle. Activates the warning buzzer and warning systems ON indicator Transmits Moving Object Detection lamp signal to combination meter via CAN communication
Blind Spot Warning indicator LH/RHReceives Moving Object Detection indicator operation signal from rear view camera and turns OFF, turns ON or blinks
Warning system switchInputs the switch signal to ITS control unit
Warning system switch indicator (on the warning systems switch)Indicates Moving Object Detection system status
Rear view cameraDetects the lane marker by the built-in camera Transmits detected lane condition signal to ITS control unit
ABS actuator and electric unit (control unit)Transmits vehicle speed signal to ITS control unit via CAN communication Transmits yaw rate signal/side G sensor signal to ITS control unit via CAN communication
Buzzer (combination meter)Receives buzzer signal from ITS control unit via CAN and sounds buzzer.
Combination meter (vehicle information display)Turns the Moving Object Detection (MOD) warning indicator ON/OFF according to the signals from the ITS control unit via CAN communication Receives MOD ON indicator signal via CAN communication.
Steering angle sensorTransmits steering angle sensor signal to ITS control unit via CAN communication
BCMTransmits turn signal indicator to ITS control unit via CAN communication Transmits dimmer signal to ITS control unit via CAN communication
ECMTransmits engine speed signal to ITS control unit via CAN communication
TCMTransmits the output shaft speed signal, input speed signal, current gear position signal and shift position signal to ITS control unit via CAN communication
AV control unitReceives the various systems and camera signals via CAN communication and routes them to the center display
Center displayDisplays the various system screen signals according to the priority level received via CAN communication
Rear view camera washer control unitControls the air pump to drive air to the rear camera lens according to the signals received from the ITS control unit
Rear view camera air pump motorDrives air to the rear camera lens according to the signals received from the pump control unit

Scheme 101

Scheme 101: SYSTEM DIAGRAM

MOVING OBJECT DETECTION SYSTEM OPERATION DESCRIPTION

  1. ITS control unit enables Moving Object Detection system.
  2. Combination meter turns Moving Object Detection ON indicator lamp ON/OFF according to the signals from ITS control unit via CAN communication.
  3. ITS control unit starts the control as follows, based on a vehicle detection signal.

Operation Condition of Moving Object Detection System

ITS control unit performs the control when the following conditions are satisfied

  1. Moving Object Detection ON indicator: ON
  2. When the vehicle is moving in R (reverse) at 8 km/h (5 MPH) or less.

Note. When the Moving Object Detection system setting on the Vehicle Information Display is ON. Moving Object Detection braking will not operate or will stop operating and only a warning chime will sound under the following conditions: When driving with a tire that is not within normal tire conditions (pressure, wear, chain, spare, etc.) When the vehicle is equipped with non-original brake parts or suspension parts. Do not use the MOD system when towing a trailer. Excessive noise such as the audio system will interfere with the chime sound, and it may not be heard.

DISPLAY AND WARNING OPERATION

Vehicle condition/Driver's operation
Moving Object Detection ON indicatorVehicle speed (Approx.) [km/h (MPH)]Status of vehicle detection within detection areaIndication on the Moving Object Detection indicatorBuzzer
OFFOFFOFF
BlueLess than approx. 8 km/h (5 MPH)Vehicle is detectedONON
Approx. 8 km/h (5 MPH) or moreVehicle is absentONOFF
Vehicle is detectedONOFF
Vehicle is not detectedONOFF

ECU IDENTIFICATION

ITS control unit part number is displayed.

DESCRIPTION

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

Scheme 102

Scheme 102: WORK SHEET SAMPLE
  1. Perform action test to verify the customer's concern.
  2. Perform action test and check the system operation after system diagnosis.
WARNINGBe careful of traffic conditions and safety around the vehicle when performing road test.
CAUTIONFully understand the following items well before the road test; Precautions: Refer to " PRECAUTION FOR LDW SYSTEM SERVICE ". System description for LDW: Refer to " SYSTEM DESCRIPTION ". System description for BSW: Refer to " SYSTEM DESCRIPTION ". System description for MOD: Refer to " SYSTEM DESCRIPTION ". Handling precaution: Refer to " PRECAUTIONS FOR LANE DEPARTURE WARNING ".

Always perform the calibration after removing and installing or replacing the rear view camera.

CAUTIONThe system does not operate normally unless the rear view camera aiming adjustment is performed. Always perform it.

Always perform the calibration after removing and installing or replacing the rear view camera.

CAUTIONPlace the vehicle on level ground when the calibration is performed. Follow the CONSULT when performing the calibration. (Rear view camera calibration cannot be operated without CONSULT).

Scheme 103

Scheme 103: Work Procedure (Preparation)
  1. PERFORM SELF-DIAGNOSIS Perform self-diagnosis of the ITS control unit. Is any DTC detected? Except "U1308" >> Perform diagnosis on the detected DTC and repair or replace the applicable item. Refer to " «DTC INDEX»(ref-576065-S16768496962013090900000) ". "U1308" or no DTC >> GO TO 2.
  2. PREPARATION BEFORE REAR VIEW CAMERA CALIBRATION NOTE: Select the "AVM" to diagnose the ITS control unit by CONSULT. Perform pre-inspection for diagnosis. Refer to " «INSPECTION PROCEDURE»(ref-576067-S10727478072013090900000) ". 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. Situate vehicle where the camera is exposed at an atmosphere temperature between 0°C (32°F) and 30°C (86°F) Move the shift selector to P (Park) and release the parking brake. Clean the rear view camera. >> GO TO 3.
  3. PREPARATION OF CALIBRATION TARGET MARK Prepare the calibration target mark according to the following figure: Left and right targets Center target Side of the black or white area = 200 mm (7.87 in) Side of the square target = 400 mm (15.75 in) >> Refer to " «WORK PROCEDURE (TARGET SETTING)»(ref-576067-S00166081642013090900000) ".

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

The switch does not turn ON

  1. When the Moving Object Detection system setting is ON, the Moving Object Detection ON indicator does not illuminate even if the warning system switch is depressed.

The switch does not turn OFF

  1. The Moving Object Detection ON indicator does not turn off even if the warning system switch is pressed when the Moving Object Detection ON indicator illuminates.
  1. Moving Object Detection system setting is not selectable on the vehicle information display screen. NOTE: When the ignition switch is in ACC position, Moving Object Detection system settings cannot be changed. "Moving Object Detection" is not indicated on the vehicle information display screen. The switching between ON and OFF cannot be performed by operating the vehicle information display setting system selection. The item "Moving Object Detection" on the vehicle information display screen is not active.
  2. The Moving Object Detection system setting differs from the one set at the previous driving. NOTE: Turn OFF the ignition switch and wait for 5 seconds or more.