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Home >> Toyota >> 2021 >> Venza LE >> Repair and Diagnosis (Single Page) >> Restraints >> Air Bag, SRS >> Occupant Classification System - Diagnostic Codes & Symptom Tests >> Occupant Classification System >> DTC B00C2-86: Passenger Seat Occupant Classification Sensor "C" Signal (some circuit quantity, reported via serial data) Invalid [07/2020 - ] >> Procedure
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DTC B00C2-86: Passenger Seat Occupant Classification Sensor "C" Signal (some circuit quantity, reported via serial data) Invalid [07/2020 - ]: Procedure

  1. CHECK DTC 
    1. Check the DTCs.

      Body Electrical > SRS Airbag > Trouble Codes 

      Result

      Proceed to
      DTC B00C0-86 is output
      DTC B00C2-86 is output
      DTCs B00C0-86 and B00C2-86 are output
      DTCs B00C0-86 and B00C2-86 are not output

      HINT: 

      Codes other than DTCs B00C0-86 and B00C2-86 may be output at this time, but they are not related to this check.

    Result: 

    DTC B00C2-86 is output 

    See step  5

    Result: 

    DTCs B00C0-86 and B00C2-86 are output 

    See step  8

    Result: 

    DTCs B00C0-86 and B00C2-86 are not output 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [07/2020 - ] 

    Result: 

    DTC B00C0-86 is output 

    See step  2

  2. CHECK CONNECTION OF CONNECTORS 
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
    3. Check that the connectors are properly connected to the airbag sensor assembly and front seat adjuster assembly RH (front occupant classification sensor LH).

      Result

      Proceed to
      Connectors are properly connected
      Connectors are not properly connected

    Result: 

    Connectors are not properly connected 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    Connectors are properly connected 

    See step  3

  3. CHECK CONNECTORS 
    1. Disconnect the airbag sensor assembly connector.
      GTY984871Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Front Seat Adjuster Assembly RH (Front Occupant Classification Sensor LH)
      *2 Airbag Sensor Assembly
      *3 Wire Harness
    2. Disconnect the front seat adjuster assembly RH (front occupant classification sensor LH) connector.
    3. Check that the connectors (on the airbag sensor assembly side and front seat adjuster assembly RH (front occupant classification sensor LH) side) are not damaged.

      Result

      Proceed to
      Connectors are not deformed or damaged
      Connectors are deformed or damaged

    Result: 

    Connectors are deformed or damaged 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    Connectors are not deformed or damaged 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (AIRBAG SENSOR ASSEMBLY - FRONT SEAT ADJUSTER ASSEMBLY RH) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K52-32 (SIG) - U12-2 (SIG) Always Below 1 Ω
      GTY987501Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Front Seat Adjuster Assembly RH
      *2 Airbag Sensor Assembly
      *3 Wire Harness
      *a Front view of wire harness connector
      (to Airbag Sensor Assembly)
      *b Front view of wire harness connector
      (to Front Seat Adjuster Assembly RH (Front Occupant Classification Sensor LH))

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH 

    for Manual Seat: Refer to REMOVAL [07/2020 - 10/2022] , or refer to REMOVAL [10/2022 - ]

    for Power Seat: Refer to REMOVAL [07/2020 - 10/2022] , or refer to REMOVAL [10/2022 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  5. CHECK CONNECTION OF CONNECTORS 
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
    3. Check that the connectors are properly connected to the airbag sensor assembly and front seat adjuster assembly RH (rear occupant classification sensor LH).

      Result

      Proceed to
      Connectors are properly connected
      Connectors are not properly connected

    Result: 

    Connectors are not properly connected 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    Connectors are properly connected 

    See step  6

  6. CHECK CONNECTORS 
    1. Disconnect the airbag sensor assembly connector.
      GTY984871Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Front Seat Adjuster Assembly RH (Rear Occupant Classification Sensor LH)
      *2 Airbag Sensor Assembly
      *3 Wire Harness
    2. Disconnect the front seat adjuster assembly RH (rear occupant classification sensor LH) connector.
    3. Check that the connectors (on the airbag sensor assembly side and front seat adjuster assembly RH (rear occupant classification sensor LH) side) are not damaged.

      Result

      Proceed to
      Connectors are not deformed or damaged
      Connectors are deformed or damaged

    Result: 

    Connectors are deformed or damaged 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    Connectors are not deformed or damaged 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (AIRBAG SENSOR ASSEMBLY - FRONT SEAT ADJUSTER ASSEMBLY RH) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K52-32 (SIG) - U13-2 (SIG) Always Below 1 Ω
      GTY987467Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Front Seat Adjuster Assembly RH
      *2 Airbag Sensor Assembly
      *3 Wire Harness
      *a Front view of wire harness connector
      (to Airbag Sensor Assembly)
      *b Front view of wire harness connector
      (to Front Seat Adjuster Assembly RH (Rear Occupant Classification Sensor LH))

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH 

    for Manual Seat: Refer to REMOVAL [07/2020 - 10/2022] , or refer to REMOVAL [10/2022 - ]

    for Power Seat: Refer to REMOVAL [07/2020 - 10/2022] , or refer to REMOVAL [10/2022 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  8. CHECK CONNECTION OF CONNECTORS 
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
    3. Check that the connectors are properly connected to the airbag sensor assembly and front seat adjuster assembly RH.

      Result

      Proceed to
      Connectors are properly connected
      Connectors are not properly connected

    Result: 

    Connectors are not properly connected 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    Connectors are properly connected 

    See step  9

  9. CHECK CONNECTORS 
    1. Disconnect the airbag sensor assembly connector.
      GTY985316Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Front Seat Adjuster Assembly RH
      *2 Airbag Sensor Assembly
      *3 Wire Harness
    2. Disconnect the front seat adjuster assembly RH connector.
    3. Check that the connectors (on the airbag sensor assembly side and front seat adjuster assembly RH side) are not damaged.

      Result

      Proceed to
      Connectors are not deformed or damaged
      Connectors are deformed or damaged

    Result: 

    Connectors are deformed or damaged 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    Connectors are not deformed or damaged 

    See step  10

  10. CHECK HARNESS AND CONNECTOR (AIRBAG SENSOR ASSEMBLY - FRONT SEAT ADJUSTER ASSEMBLY RH) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K52-32 (SIG) - U12-2 (SIG) Always Below 1 Ω
      K52-32 (SIG) - U13-2 (SIG) Always Below 1 Ω
      GTY987379Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Front Seat Adjuster Assembly RH
      *2 Airbag Sensor Assembly
      *3 Wire Harness
      *a Front view of wire harness connector
      (to Airbag Sensor Assembly)
      *b Front view of wire harness connector
      (to Front Seat Adjuster Assembly RH (Front Occupant Classification Sensor LH))
      *c Front view of wire harness connector
      (to Front Seat Adjuster Assembly RH (Rear Occupant Classification Sensor LH))

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  11

  11. CHECK HARNESS AND CONNECTOR (AIRBAG SENSOR ASSEMBLY - FRONT SEAT ADJUSTER ASSEMBLY RH) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K52-32 (SIG) - Other terminals and body ground Always 10 kΩ or higher
      U12-2 (SIG) - Other terminals and body ground Always 10 kΩ or higher
      U13-2 (SIG) - Other terminals and body ground Always 10 kΩ or higher
      GTY987379Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Front Seat Adjuster Assembly RH
      *2 Airbag Sensor Assembly
      *3 Wire Harness
      *a Front view of wire harness connector
      (to Airbag Sensor Assembly)
      *b Front view of wire harness connector
      (to Front Seat Adjuster Assembly RH (Front Occupant Classification Sensor LH))
      *c Front view of wire harness connector
      (to Front Seat Adjuster Assembly RH (Rear Occupant Classification Sensor LH))

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  12

  12. CHECK HARNESS AND CONNECTOR (AIRBAG SENSOR ASSEMBLY - FRONT SEAT ADJUSTER ASSEMBLY RH) 
    1. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
      GTY987379Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Front Seat Adjuster Assembly RH
      *2 Airbag Sensor Assembly
      *3 Wire Harness
      *a Front view of wire harness connector
      (to Airbag Sensor Assembly)
      *b Front view of wire harness connector
      (to Front Seat Adjuster Assembly RH (Front Occupant Classification Sensor LH))
      *c Front view of wire harness connector
      (to Front Seat Adjuster Assembly RH (Rear Occupant Classification Sensor LH))
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      K52-32 (SIG) - Body ground Ignition switch ON Below 1 V
      U12-2 (SIG) - Body ground Ignition switch ON Below 1 V
      U13-2 (SIG) - Body ground Ignition switch ON Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [07/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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