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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (5 Of 7) >> Airbag System >> DTC B00B5-00: Driver Seat Track Position Restraints Sensor Circuit Undetermined Failure [11/2023 - ] >> Procedure

DTC B00B5-00: Driver Seat Track Position Restraints Sensor Circuit Undetermined Failure [11/2023 - ]: Procedure

  1. CHECK CONNECTION OF CONNECTORS 

    Pre-procedure1

    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.

      Procedure1

    3. Check that the connectors are properly connected to the airbag sensor assembly and seat position sensor (separate type front seat cushion spring assembly LH).

      OK

      The connectors are properly connected.

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. None

    Result: 

    NG 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    OK 

    See step  2

  2. CHECK CONNECTORS 

    Pre-procedure1

    1. Disconnect the airbag sensor assembly connector.
      GTY1060124Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH)
      *2 Front Seat Inner Belt Assembly LH
      *3 Airbag Sensor Assembly
      *4 Wire Harness
    2. Disconnect the seat position sensor connector.

      Procedure1

    3. 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

    4. None

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. INSPECT SEAT POSITION SENSOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH) 

    Pre-procedure1

    1. Remove the seat position sensor (separate type front seat cushion spring assembly LH).

      Refer to REMOVAL [11/2023 - ]

      Procedure1

    2. Inspect the seat position sensor.
      1. Remove and reinsert the metal plate into the slit of the seat position sensor and measure the current value.
        GTY986855Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *1 Seat Position Sensor *2 Auxiliary battery
        *a Component without harness connected
        (Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH))        		 *b Tester
        *c Metal plate - -

        Standard Current

        Tester Connection Condition Specified Condition
        Tester positive (+) - 1
        Tester negative (-) - Auxiliary battery negative (-)        		 Metal plate in slit 4.7 to 7.3 mA
        Metal plate not in slit 11.4 to 17.9 mA

        Result

        Proceed to
        OK
        NG

      Post-procedure1

    3. None

    Result: 

    NG 

    REPLACE SEAT POSITION SENSOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH). Refer to  REMOVAL [11/2023 - ] 

    Result: 

    OK 

    See step  4

  4. CHECK SEAT POSITION SENSOR CIRCUIT (CHECK FOR OPEN IN THE CIRCUIT) 

    Pre-procedure1

    1. Using a service wire, connect terminals 27 (LSP+) and 24 (GNDL) of connector B.
      NOTE:

      Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.

      GTY1178546Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH) *2 Front Seat Inner Belt Assembly LH
      *3 Airbag Sensor Assembly *4 Wire Harness
      *5 Service Wire - -
      *a Front view of wire harness connector
      (to Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH))      		 *b Front view of wire harness connector
      (to Airbag Sensor Assembly)

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      e22-1 (GND) - e22-2 (VS) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Disconnect the service wire from connector B.

    Result: 

    NG 

    See step  17

    Result: 

    OK 

    See step  5

  5. 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.
      GTY1177905Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH) *2 Front Seat Inner Belt Assembly LH
      *3 Airbag Sensor Assembly *4 Wire Harness
      *a Front view of wire harness connector
      (to Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH))      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      e22-1 (GND) - Body ground Always 1 MΩ or higher
      e22-2 (VS) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  13

    Result: 

    OK 

    See step  6

  6. CHECK SEAT POSITION SENSOR CIRCUIT (CHECK FOR SHORT TO +B IN THE CIRCUIT) 

    Pre-procedure1

    1. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    2. Turn the ignition switch to ON.

      Procedure1

    3. Measure the voltage according to the value(s) in the table below.
      GTY1177905Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH) *2 Front Seat Inner Belt Assembly LH
      *3 Airbag Sensor Assembly *4 Wire Harness
      *a Front view of wire harness connector
      (to Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH))      		 - -

      Standard Voltage

      Tester Connection Condition Specified Condition
      e22-1 (GND) - Body ground Ignition switch ON Below 1 V
      e22-2 (VS) - Body ground Ignition switch ON Below 1 V

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. Turn the ignition switch off.
    5. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.

    Result: 

    NG 

    See step  9

    Result: 

    OK 

    See step  7

  7. CLEAR DTC 

    Pre-procedure1

    1. Connect the airbag sensor assembly connector.
      GTY1080613Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH)
      *2 Front Seat Inner Belt Assembly LH
      *3 Airbag Sensor Assembly
      *4 Wire Harness
    2. Connect the seat position sensor (separate type front seat cushion spring assembly LH) connector.
    3. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.

      Procedure1

    5. Clear the DTCs stored in memory.

      Body Electrical > SRS Airbag > Clear DTCs 

      Result

      Proceed to
      NEXT

      Post-procedure1

    6. Turn the ignition switch off.

    Result: 

    NEXT 

    See step  8

  8. CHECK DTC 

    Pre-procedure1

    1. Turn the ignition switch to ON, and wait for at least 60 seconds.

      Procedure1

    2. Check for DTCs.

      Body Electrical > SRS Airbag > Trouble Codes 

      Result

      Result Proceed to
      B00B5-00 is output A
      B00B5-00 is not output B

      HINT: 

      Codes other than DTC B00B5-00 may be output at this time, but they are not related to this check.

      Post-procedure1

    3. None

    Result: 

    A 

    REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [11/2023 - ] 

    Result: 

    B 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

  9. 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  10

  10. CHECK CONNECTORS 

    Pre-procedure1

    1. Disconnect the front seat inner belt assembly LH connector.
      GTY1060318Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH)
      *2 Front Seat Inner Belt Assembly LH
      *3 Airbag Sensor Assembly
      *4 Wire Harness

      Procedure1

    2. 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

    3. None

    Result: 

    NG 

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

    Result: 

    OK 

    See step  11

  11. CHECK HARNESS AND CONNECTOR (SEAT POSITION SENSOR - FRONT SEAT INNER BELT ASSEMBLY LH) 

    Pre-procedure1

    1. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    2. Turn the ignition switch to ON.

      Procedure1

    3. Measure the voltage according to the value(s) in the table below.
      GTY1177797Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH) *2 Front Seat Inner Belt Assembly LH
      *3 Airbag Sensor Assembly *4 Wire Harness
      *a Front view of wire harness connector
      (to Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH))      		 - -

      Standard Voltage

      Tester Connection Condition Specified Condition
      e22-2 (VS) - Body ground Ignition switch ON Below 1 V
      e22-1 (GND) - Body ground Ignition switch ON Below 1 V

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. Turn the ignition switch off.
    5. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  12

  12. CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT ASSEMBLY LH - AIRBAG SENSOR ASSEMBLY) 

    Pre-procedure1

    1. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    2. Turn the ignition switch to ON.

      Procedure1

    3. Measure the voltage according to the value(s) in the table below.
      GTY1177812Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH) *2 Front Seat Inner Belt Assembly LH
      *3 Airbag Sensor Assembly *4 Wire Harness
      *a Front view of wire harness connector
      (to Front Seat Inner Belt Assembly LH)      		 - -

      Standard Voltage

      Tester Connection Condition Specified Condition
      M70-4 (LSP+) - Body ground Ignition switch ON Below 1 V
      M70-3 (LSP-) - Body ground Ignition switch ON Below 1 V

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. Turn the ignition switch off.
    5. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.

    Result: 

    OK 

    REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to  REMOVAL [11/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  13. 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  14

  14. CHECK CONNECTORS 

    Pre-procedure1

    1. Disconnect the front seat inner belt assembly LH connector.
      GTY1060318Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH)
      *2 Front Seat Inner Belt Assembly LH
      *3 Airbag Sensor Assembly
      *4 Wire Harness

      Procedure1

    2. 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

    3. None

    Result: 

    NG 

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

    Result: 

    OK 

    See step  15

  15. 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.
      GTY1177797Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH) *2 Front Seat Inner Belt Assembly LH
      *3 Airbag Sensor Assembly *4 Wire Harness
      *a Front view of wire harness connector
      (to Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH))      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      e22-2 (VS) - Body ground Always 1 MΩ or higher
      e22-1 (GND) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  16

  16. CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT ASSEMBLY LH - AIRBAG SENSOR ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1177812Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH) *2 Front Seat Inner Belt Assembly LH
      *3 Airbag Sensor 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
      M70-4 (LSP+) - Body ground Always 1 MΩ or higher
      M70-3 (LSP-) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to  REMOVAL [11/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  17. 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  18

  18. CHECK CONNECTORS 

    Pre-procedure1

    1. Disconnect the front seat inner belt assembly LH connector.
      GTY1060318Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH)
      *2 Front Seat Inner Belt Assembly LH
      *3 Airbag Sensor Assembly
      *4 Wire Harness

      Procedure1

    2. 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

    3. None

    Result: 

    NG 

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

    Result: 

    OK 

    See step  19

  19. CHECK HARNESS AND CONNECTOR (SEAT POSITION SENSOR - FRONT SEAT INNER BELT ASSEMBLY LH) 

    Pre-procedure1

    1. Using a service wire, connect terminals 2 and 1 of connector F.
      NOTE:

      Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.

      Procedure1

    2. Measure the resistance according to the value(s) in the table below.
      GTY1178633Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH) *2 Front Seat Inner Belt Assembly LH
      *3 Airbag Sensor Assembly *4 Wire Harness
      *5 Service Wire - -
      *a Front view of wire harness connector
      (to Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH))      		 *b Front view of wire harness connector
      (to Front Seat Inner Belt Assembly LH)

      Standard Resistance

      Tester Connection Condition Specified Condition
      e22-2 (VS) - e22-1 (GND) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Disconnect the service wire from connector F.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  20

  20. CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT ASSEMBLY LH - AIRBAG SENSOR ASSEMBLY) 

    Pre-procedure1

    1. Using a service wire, connect terminals 27 (LSP+) and 24 (GNDL) of connector B.
      NOTE:

      Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.

      Procedure1

    2. Measure the resistance according to the value(s) in the table below.
      GTY1178279Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Seat Position Sensor (Separate Type Front Seat Cushion Spring Assembly LH) *2 Front Seat Inner Belt Assembly LH
      *3 Airbag Sensor Assembly *4 Wire Harness
      *5 Service Wire - -
      *a Front view of wire harness connector
      (to Front Seat Inner Belt Assembly LH)      		 *b Front view of wire harness connector
      (to Airbag Sensor Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      M70-4 (LSP+) - M70-3 (LSP-) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Disconnect the service wire from connector B.

    Result: 

    OK 

    REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to  REMOVAL [11/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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