LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2019 >> Q50 Sport, AWD >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Seat Belt Control System >> System Description >> System >> Pre-Crash Seat Belt System >> Fail-Safe
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Pre-Crash Seat Belt System: Fail-Safe

When a system malfunction is detected, deactivates a part of the system or all functions depending on the malfunctioning part.

When the malfunction condition recovers to the normal condition, the system returns to the normal operation.

Display contents of CONSULT

Fail-safe

B2451-00: SEAT BLT MTR DR CIRC

Driver side

Fully deactivates the whole operation.

B2452-00: SEAT BLT MTR AS CIRC

Driver side

Deactivates a part of comfort function.

Passenger side

Fully deactivates the whole operation.

B2455-00: CONTROL UNIT DR

Driver side

Stops the operation in the conditions as per the following.*1

  • During emergency brake operation
  • When ABS continuously operates
  • When lateral slippage during cornering occurs
  • When forward emergency braking operates
  • When steering wheel is rotated for emergency
  • When the vehicle inclined excessively*2
  • A part or the whole comfort function

Passenger side

Stops the operation in the conditions as per the following.*1

  • During emergency brake operation
  • When ABS continuously operates
  • When lateral slippage during cornering occurs
  • When forward emergency braking operates
  • When steering wheel is rotated for emergency
  • When the vehicle inclined excessively*2
  • A part or the whole comfort function

B2457-00: CONTROL UNIT AS

Driver side

Deactivates a part of comfort function.

Passenger side

Fully deactivates the whole operation.*1

B2458-00: LOCAL COMM

Driver side

Deactivates a part of comfort function.

Passenger side

Fully deactivates the whole operation.*1

B2461-00: VHCL SPEED SIGNAL

Driver side

Stops the operation in the conditions as per the following.

  • During emergency brake operation
  • When ABS continuously operates
  • When lateral slippage during cornering occurs
  • When steering wheel is rotated for emergency
  • When the vehicle inclined excessively*2
  • When comfort function operates

Passenger side

Stops the operation in the conditions as per the following.

  • During emergency brake operation
  • When ABS continuously operates
  • When lateral slippage during cornering occurs
  • When steering wheel is rotated for emergency
  • When the vehicle inclined excessively*2
  • A part or the whole comfort function

B2463-00: ROLLOVER SIGNAL

Driver side

Stops the operation in the conditions as per the following.

  • When the vehicle inclined excessively*2
  • A part or the whole comfort function

Passenger side

When the vehicle inclined excessively*2

B2466-00: DR/AS CONTROL UNIT

Driver side

Deactivates a part of comfort function.

Passenger side

Stops the operation in the conditions as per the following.*1

  • During emergency brake operation
  • When ABS continuously operates
  • When lateral slippage during cornering occurs
  • When forward emergency braking operates
  • When steering wheel is rotated for emergency
  • When the vehicle inclined excessively*2
  • A part or the whole comfort function

B2470-00: SYS HEAT PROTC DR

Driver side

  • Fully deactivates the whole operation.
  • Operation return
    • 1 time operation becomes possible after approximately 30 seconds
    • Returns to the initial condition after approximately 8 minutes

B2471-00: SYS HEAT PROTC AS

Passenger side

  • Fully deactivates the whole operation.
  • Operation return
    • 1 time operation becomes possible after approximately 30 seconds
    • Returns to the initial condition after approximately 8 minutes

B2473-86: Brake fluid pressure signal

Driver side

Stops the operation in the conditions as per the following.

  • During emergency brake operation
  • When ABS continuously operates
  • A part of comfort function

Passenger side

Stops the operation in the conditions as per the following.

  • During emergency brake operation
  • When ABS continuously operates

U0126-00: ST ANG SEN SIG

Driver side

Stops the operation in the conditions as per the following.

  • When lateral slippage during cornering occurs
  • When steering wheel is rotated for emergency
  • A part of comfort function

Passenger side

Stops the operation in the conditions as per the following.

  • When lateral slippage during cornering occurs
  • When steering wheel is rotated for emergency

U0428-00: STRG ANGL CAL

Driver side

Stops the operation in the conditions as per the following.

  • When lateral slippage during cornering occurs
  • When steering wheel is rotated for emergency
  • A part of comfort function

Passenger side

Stops the operation in the conditions as per the following.

  • When lateral slippage during cornering occurs
  • When steering wheel is rotated for emergency

U1000-01: CAN COMM CURCUIT

Both side

Stops the operation in the conditions as per the following.*1

  • During emergency brake operation
  • When ABS continuously operates
  • When lateral slippage during cornering occurs
  • When forward emergency braking operates
  • When steering wheel is rotated for emergency
  • When the vehicle inclined excessively*2
  • A part or the whole comfort function

*1 : The deactivation mode differs depending on the internal malfunctioning condition of control unit

*2 : Except for Mexico