Nissan Pathfinder: Sonar System - System Description

• Component Parts. Sonar System
• System
• Diagnosis System (sonar Control Unit)

Component Parts. Sonar System Nissan Pathfinder R53

Component Parts Location

Sonar Control Unit

• Sonar control unit is installed behind the front A/C switch assembly.

  

• For Nissan Pathfinder vehicles with around view monitor system, sonar sensor signals are received by the sonar control unit and transmitted to the around view monitor control unit and combination meter via CAN communication for the indicator display.

• For Nissan Pathfinder vehicles with rear view monitor system, Sonar sensor signals are received by the sonar control unit and transmitted to the AV control unit and combination meter via CAN communication for the indicator display.

• Sonar control unit outputs a buzzer signal to the AV control unit via CAN communication for the audible alert.

Sonar Sensor

• The sonar sensors are installed in the front bumper and rear bumper fascias.

  

• When a distance from an obstacle is detected, a signal is transmitted to the sonar control unit.

System Nissan Pathfinder

System Description

SYSTEM DIAGRAM

Sonar Control Unit Input Signal (CAN Communication)

DESCRIPTION

• The sonar sensors installed on the front (with front sonar system) and rear bumpers detect obstacles around the bumper.

• The sonar control unit changes the buzzer cycle and warning indicator according to the distance from an obstacle detected by the sonar sensors.

SONAR SYSTEM ACTIVATION CONDITION

The sonar system warns the driver of the presence of obstacles when the following conditions are met:

×: Activation

OBSTACLE DETECTION DISTANCE

Warning Buzzer Frequency

• The warning buzzer output frequency changes in 4 levels according to the detection distance.

• As the Nissan Pathfinder vehicle approaches an obstacle, the buzzer-sounding cycle becomes shorter.

• Rear Sonar

  Obstacle detection range image

  A.

  Approx. 59.06 in (150 cm) (default value)

  B.

  Approx. 23.62 in (60 cm) (default value)

• Front and Rear Sonar

  Obstacle detection range image

  A.

  Approx. 47.24 in (120 cm) (default value)

  B.

  Approx. 23.62 in (60 cm) (default value)

• Detection distance of an obstacle changes as shown in the table below:

  Detection distance

  Item (detection range)	Outer sensor	Side sensor	Front inner sensor	Rear inner sensor
  FAR	Approx. 25.98 in (66 cm)	Approx. 25.98 in (66 cm)	Approx. 43.31 in (110 cm)	Approx. 64.96 in (165 cm)
  NORMAL (default value)	Approx. 23.62 in (60 cm)	Approx. 23.62 in (60 cm)	Approx. 39.37 in (100 cm)	Approx. 59.06 in (150 cm)
  NEAR	Approx. 21.26 in (54 cm)	Approx. 21.26 in (54 cm)	Approx. 35.43 in (90 cm)	Approx. 53.15 in (135 cm)

Sonar Indicator

• The sonar indicator displays in three stages (green, yellow, and red), according to the distance from an obstacle.

• Sonar indicator distance display changes according to the following table:

  Status of warning	Detection distance
  	Outer sensor	Front inner sensor	Rear inner sensor
  Red	0 - 11.81 in (0 - 30 cm)	0 - 11.81 in (0 - 30 cm)	0 - 11.81 in (0 - 30 cm)
  Yellow	12.2 - 19.69 in (31 - 50 cm)	12.2 - 23.62 in (31 - 60 cm)	12.2 - 23.62 in (31 - 60 cm)
  Green	20.08 - 23.62 in (51 - 60 cm)	24.02 - 39.37 in (61 - 100 cm)	24.02 - 59.06 in (61 - 150 cm)

MAC（Message Authentication Code）

MAC (Message Authentication Code) is a function that prevents unauthorized communication by using secure authentication communication. Sonar control unit writes a MAC key required for communication between ECUs and performs MAC diagnosis.

Diagnosis System (sonar Control Unit) Nissan Pathfinder 5th Gen

CONSULT Function

APPLICATION ITEMS

CONSULT can display each diagnostic item using the diagnostic test modes shown:

SELF-DIAGNOSTIC RESULTS

For details, refer to DTC Index .

Freeze Frame Data (FFD)

The following vehicle status is recorded when DTC is detected and is displayed on CONSULT.

DATA MONITOR

NOTE:

The following table includes information (items) inapplicable to this Nissan Pathfinder vehicle. For information (items) applicable to this vehicle, refer to CONSULT display items.

WORK SUPPORT

ECU IDENTIFICATION

Displays the part number of the sonar control unit.

B2720 Corner Sensor [rl] ++++