PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2090

DTC Code DTC Name
B2090 Driving Support System Malfunction

DESCRIPTION

The seat belt control ECU receives collision information from the driving support ECU and skid control ECU via CAN communication, and tightens the seat belt by operating the motor inside the front seat outer belt assembly.

When the driving support ECU detects a malfunction in the cruise control system, dynamic radar cruise control system, lane-keeping assist system, and pre-crash safety system ("Pre-Crash Safety 2" part), or detects that the lane recognition camera sensor has not been adjusted, the malfunction information is sent to the seat belt control ECU, which outputs this DTC.

When DTC B2090 is detected, other DTCs output by the driving support ECU (cruise control system, dynamic radar cruise control system, lane-keeping assist system, Pre-Crash Safety 2) are also output.

Tech Tips

If the object recognition camera sensor is replaced with a new one and the adjustment of the object recognition camera sensor has not been performed, DTC B2090 is output.

DTC Code DTC Detection Condition Trouble Area
B2090 While the initial check is running, the engine switch is on (IG) and the pre-crash safety system is operating, the driving support ECU detects a malfunction for 1 second or more, or the state in which the lane recognition camera sensor assembly beam axis adjustment has not been performed is detected for 1 second or more.

  • Cruise control system

  • Dynamic radar cruise control system

  • Lane-keeping assist system

  • Seat belt control ECU

INSPECTION PROCEDURE

Tech Tips

When clearing the DTCs, first clear the DTC output from the driving support ECU, and then clear the DTC output from the seat belt control ECU.

PROCEDURE


  1. CHECK FOR DTC (CRUISE CONTROL SYSTEM)


    1. Check for DTCs Click here.

      OK
      Cruise control system DTCs are not output.

    NG

    GO TO CRUISE CONTROL SYSTEM Click here

    OK

  2. CHECK FOR DTC (DYNAMIC RADAR CRUISE CONTROL SYSTEM)


    1. Check for DTCs Click here.

      OK
      Dynamic radar cruise control system DTCs are not output.

    NG

    GO TO DYNAMIC RADAR CRUISE CONTROL SYSTEM Click here

    OK

  3. CHECK FOR DTC (LANE-KEEPING ASSIST SYSTEM)


    1. Check for DTCs Click here.

      OK
      Lane-keeping assist system DTCs are not output.

    NG

    GO TO LANE-KEEPING ASSIST SYSTEM Click here

    OK

  4. CHECK FOR DTC (PRE-CRASH SAFETY SYSTEM)


    1. Check the DTCs Click here.

      OK
      DTCs for Pre-Crash 2 are not output.

    NG

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    OK

  5. ADJUST LANE RECOGNITION CAMERA SENSOR ASSEMBLY


    1. Adjust the lane recognition camera sensor assembly Click here.


    NEXT

  6. CHECK FOR DTC (PRE-CRASH SAFETY SYSTEM)


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC B2090 is not output.

    NG

    REPLACE SEAT BELT CONTROL ECU Click here

    OK

    END