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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 179 (Sonar System) >> Ecu Diagnosis Information >> Sonar Control Unit >> Fail Safe

Fail Safe

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

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Fault

Fail-safe operation

U1000: CAN COMM CIRCUIT

  • Loss of communication with ABS actuator and electric unit (control unit)
  • Loss of communication with TCU
  • Front sonar system is OFF, rear sonar system is ON (selector lever in reverse)
  • Front and rear sonar system are OFF

B2720: CORNER SENSOR [RL]

  • Open circuit/short circuit to ground
  • Short circuit to voltage
  • Sensor element malfunction
  • Obstacle detection of the sensor in error is stopped
  • Audible warning (front sonar buzzer) of all sensors is stopped
  • Front sonar buzzer sounds for 3 seconds

B2721: CENTER SENSOR [RL]

B2722: CENTER SENSOR [RR]

B2723: CORNER SENSOR [RR]

B2724: SONAR CONTROL UNIT

Configuration check

  • Off indicator blinks periodically (500ms ON, 500ms OFF)
  • Front sonar buzzer sounds for 3 seconds

B2728: LED

  • Short circuit to ground
  • Short circuit to voltage
  • Open circuit
  • Audible warning (front sonar buzzer) of all sensors is stopped
  • Front sonar buzzer sounds for 3 seconds

B2729: CORNER SENSOR [FL]

  • Open circuit/short circuit to ground
  • Short circuit to voltage
  • Sensor element malfunction
  • Obstacle detection of the sensor in error is stopped
  • Audible warning (front sonar buzzer) of all sensors is stopped
  • Front sonar buzzer sounds for 3 seconds

B272A: CENTER SENSOR [FL]

B272B: CENTER SENSOR [FR]

B272C: CORNER SENSOR [FR]

B272D: FRONT BUZZER

  • Open circuit/short circuit to ground
  • Short circuit to voltage
  • Off indicator blinks periodically (500ms ON, 500ms OFF)
  • Audible warning (front sonar buzzer) of all sensors is stopped