PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2063

DTC Code DTC Name
B2063 Buckle Switch Malfunction

DESCRIPTION


DTC No. DTC Detection Condition Trouble Area
B2063

  • Open, short, +B short or body ground short between terminals of center airbag sensor assembly and front seat inner belt assembly (driver side)

  • Open, short, +B short or body ground short between terminals of seat belt control ECU and front seat inner belt assembly (passenger side)

  • Front seat inner belt assembly (driver side)

  • Front seat inner belt assembly (passenger side)

  • Harness and connector

  • Center airbag sensor assembly

  • Seat belt control ECU

  • CAN communication system

WIRING DIAGRAM

A0162SLE03

INSPECTION PROCEDURE

Note

When the seat belt control ECU is replaced with a new one, Initialization must be performed Click here.

PROCEDURE


  1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM)


    1. Clear the DTCs Click here.

    2. Recheck for DTCs.

      OK
      CAN communication system DTC is not output.

    NG

    GO TO CAN COMMUNICATION SYSTEM Click here

    OK

  2. CHECK DTC OUTPUT (AIRBAG SYSTEM)


    1. Check DTC for airbag system Click here.

      OK
      Airbag system DTC is not output.

    NG

    GO TO AIRBAG SYSTEM Click here

    OK

  3. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Enter the following menus: Body / Pre-Crash / Passenger Buckle SW in the Data List and read the value displayed on the tester.

      Pre-Crash
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Passenger Buckle SW

      Buckle switch status of passenger side seat/

      UNSET: Passenger side seat belt is unfastened

      SET: Passenger side seat belt is fastened

      NG: Indeterminate data

      		 UNSET / SET / UNKNOWN -
      OK
      SET (Passenger side seat belt is fastened) appears on the tester.

    NG

    CHECK HARNESS AND CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY) Click here

    OK

    REPLACE SEAT BELT CONTROL ECU Click here

  4. CHECK HARNESS AND CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY)

    CAUTION:

    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    Tech Tips

    Make sure that the engine switch is off before disconnecting the cable.


    1. Disconnect the P4 (LHD) or Q6 (RHD) front seat inner belt assembly and Q62 seat belt control ECU connectors.

      A0160W4E02

    2. Using SST, connect terminals 1 and 3 of connector P4 (LHD) or Q6 (RHD).

      Note

      Do not forcibly insert SST into the terminals of the connector.

      SST
      09843-18040

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q62-5 (PBK+) - Q62-6 (PBK-) Always Below 1 Ω

    4. Disconnect SST from the P4 (LHD) or Q6 (RHD) connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY)

    OK

  5. CHECK HARNESS AND CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY)


    1. A01624BE02

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q62-5 (PBK+) - Body ground Always 10 kΩ or higher
      Q62-6 (PBK-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY)

    OK

  6. CHECK HARNESS AND CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY)


    1. A01624BE04

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q62-5 (PBK+) - Q62-6 (PBK-) Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY)

    OK

  7. CHECK HARNESS AND CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY)


    1. Connect the cable to the negative (-) battery terminal, and turn the engine switch on (IG).

    2. A01624BE05

      Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      Q62-5 (PBK+) - Body ground Always Below 1 V
      Q62-6 (PBK-) - Body ground Always Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY)

    OK

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

    CAUTION:

    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.


    1. Connect the connectors from the seat belt control ECU and front seat inner belt assembly (passenger side).

    2. Connect the cable to the negative (-) battery terminal and turn the engine switch on (IG). Then wait 60 seconds.

    3. Clear the DTCs Click here.

    4. Recheck for DTCs.

      OK
      DTC B2063 is not output.

    NG

    REPLACE FRONT SEAT INNER BELT ASSEMBLY (PASSENGER SIDE) Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here

  9. REPLACE FRONT SEAT INNER BELT ASSEMBLY (PASSENGER SIDE)

    CAUTION:

    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.


    1. Replace the front seat inner belt assembly of passenger side Click here.


    NEXT

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


    1. Connect the cable to the negative (-) battery terminal and turn the engine switch on (IG). Then wait 60 seconds.

    2. Clear the DTCs Click here.

    3. Recheck for DTCs.

      OK
      DTC B2063 is not output.

    NG

    REPLACE SEAT BELT CONTROL ECU Click here

    OK

    END