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HOMESERVICE MANUALSTOYOTA2025HIGHLANDER XLE, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)RESTRAINTSAIR BAG, SRSOCCUPANT CLASSIFICATION SYSTEM - DIAGNOSTIC CODES & SYMPTOM TESTSOCCUPANT CLASSIFICATION SYSTEMDTC B00C2-86: PASSENGER SEAT OCCUPANT CLASSIFICATION SENSOR "C" SIGNAL (SOME CIRCUIT QUANTITY, REPORTED VIA SERIAL DATA) INVALID [11/2023 - ]PROCEDURE
2025 Toyota Highlander XLE, FWD

DTC B00C2-86: Passenger Seat Occupant Classification Sensor "C" Signal (some circuit quantity, reported via serial data) Invalid [11/2023 - ]: Procedure

2025 Toyota Highlander XLE, FWDSECTION Procedure
  1. CHECK DTC 
    1. Check the DTCs.

      Body Electrical > SRS Airbag > Trouble Codes 

      Result

      Result Proceed to
      B00C0-86 is output A
      B00C2-86 is output B
      B00C0-86 and B00C2-86 are output C
      B00C0-86 and B00C2-86 are not output D

      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: 

    B 

    See step  5

    Result: 

    C 

    See step  8

    Result: 

    D 

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

    Result: 

    A 

    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 separate type front seat cushion spring assembly RH (front occupant classification sensor LH).

      OK

      The connectors are properly connected.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    OK 

    See step  3

  3. CHECK CONNECTORS 
    1. Disconnect the airbag sensor assembly connector.
      GTY984871Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Separate Type Front Seat Cushion Spring Assembly RH (Front Occupant Classification Sensor LH)
      *2 Airbag Sensor Assembly
      *3 Wire Harness
    2. Disconnect the separate type front seat cushion spring assembly RH (front occupant classification sensor LH) connector.
    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

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      M10-32 (SIG) - e5-2 (SIG) Always Below 1 Ω
      GTY1178458Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Separate Type Front Seat Cushion Spring 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 Separate Type Front Seat Cushion Spring Assembly RH (Front Occupant Classification Sensor LH))

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY RH 

    for Manual Seat: Refer to REMOVAL [11/2023 - ]

    for Power Seat: Refer to REMOVAL [11/2023 - ]

    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 separate type front seat cushion spring assembly RH (rear occupant classification sensor LH).

      OK

      The connectors are properly connected.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    OK 

    See step  6

  6. CHECK CONNECTORS 
    1. Disconnect the airbag sensor assembly connector.
      GTY984871Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Separate Type Front Seat Cushion Spring Assembly RH (Rear Occupant Classification Sensor LH)
      *2 Airbag Sensor Assembly
      *3 Wire Harness
    2. Disconnect the separate type front seat cushion spring assembly RH (rear occupant classification sensor LH) connector.
    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

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      M10-32 (SIG) - e6-2 (SIG) Always Below 1 Ω
      GTY1178457Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Separate Type Front Seat Cushion Spring 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 Separate Type Front Seat Cushion Spring Assembly RH (Rear Occupant Classification Sensor LH))

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY RH 

    for Manual Seat: Refer to REMOVAL [11/2023 - ]

    for Power Seat: Refer to REMOVAL [11/2023 - ]

    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 separate type front seat cushion spring assembly RH.

      OK

      The connectors are properly connected.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    OK 

    See step  9

  9. CHECK CONNECTORS 
    1. Disconnect the airbag sensor assembly connector.
      GTY985316Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Separate Type Front Seat Cushion Spring Assembly RH
      *2 Airbag Sensor Assembly
      *3 Wire Harness
    2. Disconnect the separate type front seat cushion spring assembly RH connector.
    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

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  10

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      M10-32 (SIG) - e5-2 (SIG) Always Below 1 Ω
      M10-32 (SIG) - e6-2 (SIG) Always Below 1 Ω
      GTY1177866Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Separate Type Front Seat Cushion Spring 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 Separate Type Front Seat Cushion Spring Assembly RH (Front Occupant Classification Sensor LH))
      *c Front view of wire harness connector
      (to Separate Type Front Seat Cushion Spring 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 - SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY RH) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      M10-32 (SIG) - Other terminals and body ground Always 10 kΩ or higher
      e5-2 (SIG) - Other terminals and body ground Always 10 kΩ or higher
      e6-2 (SIG) - Other terminals and body ground Always 10 kΩ or higher
      GTY1177866Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Separate Type Front Seat Cushion Spring 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 Separate Type Front Seat Cushion Spring Assembly RH (Front Occupant Classification Sensor LH))
      *c Front view of wire harness connector
      (to Separate Type Front Seat Cushion Spring 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 - SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY RH) 
    1. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
      GTY1177866Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Separate Type Front Seat Cushion Spring 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 Separate Type Front Seat Cushion Spring Assembly RH (Front Occupant Classification Sensor LH))
      *c Front view of wire harness connector
      (to Separate Type Front Seat Cushion Spring 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
      M10-32 (SIG) - Body ground Ignition switch ON Below 1 V
      e5-2 (SIG) - Body ground Ignition switch ON Below 1 V
      e6-2 (SIG) - Body ground Ignition switch ON Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

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

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

RENDER: 1.0x

NO RELATED

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