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Home >> Lexus >> 2023 >> RX 500h >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (5 Of 5) & Symptom Tests >> Airbag System >> DTC B00B5-11: Driver Seat Track Position Restraints Sensor Circuit Short to Ground [10/2022 - ] >> Procedure

DTC B00B5-11: Driver Seat Track Position Restraints Sensor Circuit Short to Ground [10/2022 - ]: Procedure

  1. CHECK CONNECTION OF CONNECTORS 

    Pre-procedure1

    • Turn the ignition switch off.
    • Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
    • Check that the connectors are properly connected to the airbag ECU assembly and seat position sensor (front seat adjuster assembly LH).

      OK

      The connectors are properly connected.

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    NG 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    OK 

    See step  2

  2. CHECK CONNECTORS 

    Pre-procedure1

    • Disconnect the airbag ECU assembly connector.
      GTY1060124Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Front Seat Adjuster Assembly LH)
      *2 Front Seat Inner Belt Assembly LH
      *3 Airbag ECU Assembly
      *4 Wire Harness
    • Disconnect the seat position sensor connector.
    • Check that the terminals of the connectors are not deformed or damaged.

      OK

      The terminals are not deformed or damaged.

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. CHECK SEAT POSITION SENSOR CIRCUIT (CHECK FOR SHORT IN THE CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1125062Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Front Seat Adjuster Assembly LH) *2 Front Seat Inner Belt Assembly LH
      *3 Airbag ECU Assembly *4 Wire Harness
      *a Front view of wire harness connector
      (to Seat Position Sensor (Front Seat Adjuster Assembly LH))      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      N1-1 - N1-2 Always 1 MΩ or higher MΩ

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  11

    Result: 

    OK 

    See step  4

  4. CHECK SEAT POSITION SENSOR CIRCUIT (CHECK FOR SHORT TO GROUND IN THE CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1125062Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Front Seat Adjuster Assembly LH) *2 Front Seat Inner Belt Assembly LH
      *3 Airbag ECU Assembly *4 Wire Harness
      *a Front view of wire harness connector
      (to Seat Position Sensor (Front Seat Adjuster Assembly LH))      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      N1-1 - Body ground Always 1 MΩ or higher MΩ
      N1-2 - Body ground Always 1 MΩ or higher MΩ

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  7

    Result: 

    OK 

    See step  5

  5. CLEAR DTC 

    Pre-procedure1

    • Connect the airbag ECU assembly connector.
      GTY1059636Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Front Seat Adjuster Assembly LH)
      *2 Front Seat Inner Belt Assembly LH
      *3 Airbag ECU Assembly
      *4 Wire Harness
    • Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    • Turn the ignition switch to ON, and wait for at least 60 seconds.
    • Clear the DTCs stored in memory.

      Body Electrical > SRS Airbag > Clear DTCs 

      Result

      Proceed to
      NEXT

    Post-procedure1

    • Turn the ignition switch off.

    Result: 

    NEXT 

    See step  6

  6. CHECK DTC 

    Pre-procedure1

    • Turn the ignition switch to ON, and wait for at least 60 seconds.
    • Check for DTCs.

      Body Electrical > SRS Airbag > Trouble Codes 

      Result

      Result Proceed to
      B00B5-11 is output A
      B00B5-11 is not output B

      HINT: 

      Codes other than DTC B00B5-11 may be output at this time, but they are not related to this check.

    Post-procedure1

    • None

    Result: 

    A 

    REPLACE AIRBAG ECU ASSEMBLY. Refer to  REMOVAL [10/2022 - 08/2023]  , or refer to  REMOVAL [08/2023 - ] 

    Result: 

    B 

    REPLACE SEAT POSITION SENSOR (FRONT SEAT ADJUSTER ASSEMBLY LH). Refer to  REMOVAL [10/2022 - 08/2023]  , or refer to  REMOVAL [08/2023 - ] 

  7. CHECK CONNECTION OF CONNECTORS 
    1. Check that the connectors are properly connected to the front seat inner belt assembly LH.

      OK

      The connectors are properly connected.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    OK 

    See step  8

  8. CHECK CONNECTORS 

    Pre-procedure1

    • Disconnect the front seat inner belt assembly LH connector.
      GTY1060318Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Front Seat Adjuster Assembly LH)
      *2 Front Seat Inner Belt Assembly LH
      *3 Airbag ECU Assembly
      *4 Wire Harness
    • Check that the terminals of the connectors are not deformed or damaged.

      OK

      The terminals are not deformed or damaged.

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    NG 

    REPLACE FRONT SEAT INNER BELT ASSEMBLY LH OR REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (SEAT POSITION SENSOR - FRONT SEAT INNER BELT ASSEMBLY LH) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1123348Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Front Seat Adjuster Assembly LH) *2 Front Seat Inner Belt Assembly LH
      *3 Airbag ECU Assembly *4 Wire Harness
      *a Front view of wire harness connector
      (to Seat Position Sensor (Front Seat Adjuster Assembly LH))      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      N1-2 - Body ground Always 1 MΩ or higher MΩ
      N1-1 - Body ground Always 1 MΩ or higher MΩ

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  10

  10. CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT ASSEMBLY LH - AIRBAG ECU ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1128264Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Front Seat Adjuster Assembly LH) *2 Front Seat Inner Belt Assembly LH
      *3 Airbag ECU Assembly *4 Wire Harness
      *a Front view of wire harness connector
      (to Front Seat Inner Belt Assembly LH)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      H148-4 (LSP+) - Body ground Always 1 MΩ or higher MΩ
      H148-3 (LSP-) - Body ground Always 1 MΩ or higher MΩ

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to  REMOVAL [10/2022 - 08/2023]  , or refer to  REMOVAL [08/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  11. CHECK CONNECTION OF CONNECTORS 
    1. Check that the connectors are properly connected to the front seat inner belt assembly LH.

      OK

      The connectors are properly connected.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    OK 

    See step  12

  12. CHECK CONNECTORS 

    Pre-procedure1

    • Disconnect the front seat inner belt assembly LH connector.
      GTY1060318Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Front Seat Adjuster Assembly LH)
      *2 Front Seat Inner Belt Assembly LH
      *3 Airbag ECU Assembly
      *4 Wire Harness
    • Check that the terminals of the connectors are not deformed or damaged.

      OK

      The terminals are not deformed or damaged.

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    NG 

    REPLACE FRONT SEAT INNER BELT ASSEMBLY LH OR REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  13

  13. CHECK HARNESS AND CONNECTOR (SEAT POSITION SENSOR - FRONT SEAT INNER BELT ASSEMBLY LH) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1123348Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Front Seat Adjuster Assembly LH) *2 Front Seat Inner Belt Assembly LH
      *3 Airbag ECU Assembly *4 Wire Harness
      *a Front view of wire harness connector
      (to Seat Position Sensor (Front Seat Adjuster Assembly LH))      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      N1-2 - N1-1 Always 1 MΩ or higher MΩ

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  14

  14. CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT ASSEMBLY LH - AIRBAG ECU ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1128264Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Front Seat Adjuster Assembly LH) *2 Front Seat Inner Belt Assembly LH
      *3 Airbag ECU Assembly *4 Wire Harness
      *a Front view of wire harness connector
      (to Front Seat Inner Belt Assembly LH)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      H148-4 (LSP+) - H148-3 (LSP-) Always 1 MΩ or higher MΩ

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to  REMOVAL [10/2022 - 08/2023]  , or refer to  REMOVAL [08/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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