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 assembly 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 dynamic radar cruise control system and pre-crash safety system, the malfunction information is sent to the seat belt control ECU, which outputs this DTC.

When DTC B2090 is detected, other DTCs are also stored by the driving support ECU (dynamic radar cruise control system and pre-crash safety system).

DTC No. DTC Detection Condition Trouble Area
B2090 While initial check is running, power switch is on (IG) and pre-crash safety system is operating, malfunction is detected in any one system of driving support system, or millimeter wave radar sensor initial beam axis adjustment has not been performed for 1 second.

  • Driving support 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 DTC OUTPUT (DYNAMIC RADAR CRUISE CONTROL SYSTEM)


    1. Check DTCs for the dynamic radar cruise control system. Click here.

      OK
      Dynamic radar cruise control system DTCs are not output.

    NG

    GO TO DYNAMIC RADAR CRUISE CONTROL SYSTEM Click here

    OK

  2. CHECK DTC OUTPUT (DRIVING SUPPORT ECU (PRE-CRASH 2))


    1. Using the intelligent tester, enter the following menus: Body / Pre-Crash 2 / DTC.

    2. Clear the DTCs Click here.

    3. Check for DTCs.

      OK
      "Pre-Crash 2" DTC is not output.

    NG

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    OK

  3. CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)


    1. Using the intelligent tester, enter the following menus: Body / Pre-Crash / DTC.

    2. Clear the DTCs Click here.

    3. Recheck for DTCs.

      OK
      DTC B2090 is not output.

    NG

    REPLACE SEAT BELT CONTROL ECU Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here