LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2021 >> Mirai XLE >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (8 Of 8) & Symptom Tests (1 Of 2) >> Airbag System >> DTC B166A-62: Right Side Restraints Sensor 5 / Left Side Restraints Sensor 5 Signal Compare Failure [11/2020 - 12/2022] >> Procedure

DTC B166A-62: Right Side Restraints Sensor 5 / Left Side Restraints Sensor 5 Signal Compare Failure [11/2020 - 12/2022]: Procedure

  1. CHECK DTC 

    Pre-procedure1

    • None
    • Check for DTCs.

      Body Electrical > SRS Airbag > Trouble Codes 

      Result

      Result Proceed to
      B009B-00, B009B-09, B009B-64, B009B-83, B009B-84, B009B-85, B009B-87, B009B-96, B009E-00, B009E-09, B009E-64, B009E-83, B009E-84, B009E-85, B009E-87 or B009E-96 is output A
      B009B-00, B009B-09, B009B-64, B009B-83, B009B-84, B009B-85, B009B-87, B009B-96, B009E-00, B009E-09, B009E-64, B009E-83, B009E-84, B009E-85, B009E-87 or B009E-96 is not output B

    Post-procedure1

    • None

    Result: 

    GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2020 - 12/2022] 

    Result: 

    See step  2

  2. CHECK SIDE AIRBAG PRESSURE SENSOR LH 
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
    3. Replace the side airbag pressure sensor LH with a new one or known good one.

      HINT: 

      Refer to REMOVAL [11/2020 - 11/2021] , or refer to REMOVAL [11/2021 - 12/2022]

      HINT: 

      • When using a new part, since the side airbag pressure sensor RH and LH have the same part number, prepare either one.
      • Use the prepared door side airbag sensor to check the side airbag pressure sensor RH as well.
    4. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Clear the DTCs stored in memory.

      Body Electrical > SRS Airbag > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  3

  3. CHECK SIDE AIRBAG PRESSURE SENSOR LH 

    Pre-procedure1

    • Turn the ignition switch off.
    • 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
      DTC B166A-62 is output A
      DTC B166A-62 is not output B

      HINT: 

      Codes other than DTC B166A-62 may be output at this time, but they are not related to this check.

    Post-procedure1

    • Turn the ignition switch off.
    • Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
    • Return the left side restraints sensor that was installed for testing to its original location.

    Result: 

    REPLACE SIDE AIRBAG PRESSURE SENSOR LH. Refer to  REMOVAL [11/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 12/2022] 

    Result: 

    See step  4

  4. CHECK SIDE AIRBAG PRESSURE SENSOR RH 
    1. Replace the side airbag pressure sensor RH with a new one or known good one.

      HINT: 

      Refer to REMOVAL [11/2020 - 11/2021] , or refer to REMOVAL [11/2021 - 12/2022]

      HINT: 

      • When using a new part, since the side airbag pressure sensor LH and RH have the same part number, prepare either one.
      • Use the prepared side airbag pressure sensor to check the side airbag pressure sensor LH as well.
    2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    3. Turn the ignition switch to ON, and wait for at least 60 seconds.
    4. Clear the DTCs stored in memory.

      Body Electrical > SRS Airbag > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  5

  5. CHECK SIDE AIRBAG PRESSURE SENSOR RH 

    Pre-procedure1

    • Turn the ignition switch off.
    • 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
      DTC B166A-62 is output A
      DTC B166A-62 is not output B

      HINT: 

      Codes other than DTC B166A-62 may be output at this time, but they are not related to this check.

    Post-procedure1

    • Turn the ignition switch off.
    • Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
    • Return the right side restraints sensor that was installed for testing to its original location.

    Result: 

    REPLACE AIRBAG ECU ASSEMBLY. Refer to  REMOVAL [11/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 12/2022] 

    Result: 

    REPLACE SIDE AIRBAG PRESSURE SENSOR RH. Refer to  REMOVAL [11/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 12/2022]