LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2022 >> LS 500h AWD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System (W/O Advanced Park) - Diagnostic Codes (2 Of 3) >> AIRBAG SYSTEM (w/o Advanced Park) >> DTC B167B: Lost Communication with Front Door Pressure Sensor LH; DTC B167C: Front Door Pressure Sensor LH Initialization Incomplete [10/2020 - 11/2021] >> Procedure

DTC B167B: Lost Communication with Front Door Pressure Sensor LH; DTC B167C: Front Door Pressure Sensor LH Initialization Incomplete [10/2020 - 11/2021]: Procedure

  1. CHECK DTC 
    1. Turn the power switch off.
    2. Turn the power switch on (IG), and wait for at least 60 seconds.
    3. Clear the DTCs stored in memory.

      Refer to DTC CHECK / CLEAR [10/2020 - 10/2023]

      Body Electrical > SRS Airbag > Clear DTCs 

    4. Turn the power switch off.
    5. Turn the power switch on (IG), and wait for at least 60 seconds.
    6. Check for DTCs.

      Refer to DTC CHECK / CLEAR [10/2020 - 10/2023]

      Body Electrical > SRS Airbag > Trouble Codes 

      Result

      Proceed to
      DTC B167B or B167C is output
      DTC B167B and B167C are not output

      HINT: 

      Codes other than DTC B167B and B167C may be output at this time, but they are not related to this check.

    Result: 

    DTC B167B and B167C are not output 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 11/2021] 

    Result: 

    DTC B167B or B167C is output 

    See step  2

  2. CHECK CONNECTION OF CONNECTORS 
    1. Turn the power 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 rear airbag sensor LH and door side airbag sensor LH.

      Result

      Proceed to
      The connectors are properly connected
      The connectors are not properly connected

    Result: 

    The connectors are not properly connected 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    The connectors are properly connected 

    See step  3

  3. CHECK CONNECTORS 
    1. Disconnect the connectors from the side airbag sensor assembly LH and door side airbag sensor LH.
      GTY838284Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Door Side Airbag Sensor LH
      *2 Side Airbag Sensor Assembly LH
      *3 Front Door Wire LH
      *4 Floor Wire
    2. Check that the connectors (on the side airbag sensor assembly LH side and door side airbag sensor LH side) are not damaged.

      Result

      Proceed to
      The connectors are not deformed or damaged
      The connectors are deformed or damaged

    Result: 

    The connectors are deformed or damaged 

    REPLACE FRONT DOOR WIRE LH OR FLOOR WIRE 

    Result: 

    The connectors are not deformed or damaged 

    See step  4

  4. CHECK DOOR SIDE AIRBAG SENSOR LH CIRCUIT 
    1. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
      GTY818013Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Door Side Airbag Sensor LH
      *2 Side Airbag Sensor Assembly LH
      *3 Front Door Wire LH
      *4 Floor Wire
      *5 Service Wire
      *a Front view of wire harness connector
      (to Door Side Airbag Sensor LH)
      *b Front view of wire harness connector
      (to Side Airbag Sensor Assembly LH)
    2. Turn the power switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      H27-2 (BDL+) - Body ground Power switch on (IG) Below 1 V
      H27-1 (BDL-) - Body ground Power switch on (IG) Below 1 V
    4. Turn the power switch off.
    5. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
    6. Using a service wire, connect terminals 1 (BDL+) and 2 (BDL-) of connector B.
      NOTE:

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

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      H27-2 (BDL+) - H27-1 (BDL-) Always Below 1 Ω
    8. Disconnect the service wire from connector B.
    9. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H27-2 (BDL+) - H27-1 (BDL-) Always 1 MΩ or higher
      H27-2 (BDL+) - Body ground Always 1 MΩ or higher
      H27-1 (BDL-) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  7

    Result: 

    OK 

    See step  5

  5. CHECK DOOR SIDE AIRBAG SENSOR LH 
    1. Connect the connector to the side airbag sensor assembly LH and door side airbag sensor LH.
      GTY801997Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Door Side Airbag Sensor RH
      *2 Side Airbag Sensor Assembly LH
    2. Interchange the door side airbag sensor LH with RH and connect the connectors to them.
    3. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    4. Turn the power switch on (IG), and wait for at least 60 seconds.
    5. Clear the DTCs stored.

      Refer to DTC CHECK / CLEAR [10/2020 - 10/2023]

      Body Electrical > SRS Airbag > Clear DTCs 

    6. Turn the power switch off.
    7. Turn the power switch on (IG), and wait for at least 60 seconds.
    8. Check for DTCs.

      Refer to DTC CHECK / CLEAR [10/2020 - 10/2023]

      Body Electrical > SRS Airbag > Trouble Codes 

      Result

      Proceed to
      DTC B166D or B166E is output
      DTC B167B or B167C is output
      DTC B166D, B166E, B167B and B167C are not output

      HINT: 

      Codes other than DTC B166D, B166E, B167B and B167C may be output at this time, but they are not related to this check.

    9. Turn the power switch off.
    10. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
    11. Return the door side airbag sensor RH and LH to their original positions and connect the connectors to them.

    Result: 

    DTC B166D or B166E is output 

    REPLACE DOOR SIDE AIRBAG SENSOR LH. Refer to  REMOVAL [10/2020 - 11/2021] 

    Result: 

    DTC B166D, B166E, B167B and B167C are not output 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 11/2021] 

    Result: 

    DTC B167B or B167C is output 

    See step  6

  6. CHECK SIDE AIRBAG SENSOR ASSEMBLY LH 
    1. Interchange the side airbag sensor assembly LH with RH and connect the connectors to them.
      GTY810198Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Side Airbag Sensor Assembly RH
      *2 Rear Airbag Sensor LH
    2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    3. Turn the power switch on (IG), and wait for at least 60 seconds.
    4. Clear the DTCs stored.

      Refer to DTC CHECK / CLEAR [10/2020 - 10/2023]

      Body Electrical > SRS Airbag > Clear DTCs 

    5. Turn the power switch off.
    6. Turn the power switch on (IG), and wait for at least 60 seconds.
    7. Check for DTCs.

      Refer to DTC CHECK / CLEAR [10/2020 - 10/2023]

      Body Electrical > SRS Airbag > Trouble Codes 

      Result

      Proceed to
      DTC B166D or B166E is output
      DTC B167B or B167C is output
      DTC B166D, B166E, B167B and B167C are not output

      HINT: 

      Codes other than DTC B166D, B166E, B167B and B167C may be output at this time, but they are not related to this check.

    8. Turn the power switch off.
    9. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
    10. Return the side airbag sensor assembly RH and LH to their original positions and connect the connectors to them.

    Result: 

    DTC B166D or B166E is output 

    REPLACE REAR AIRBAG SENSOR LH. Refer to  REMOVAL [10/2020 - 11/2021] 

    Result: 

    DTC B167B or B167C is output 

    REPLACE AIRBAG ECU ASSEMBLY. Refer to  REMOVAL [10/2020 - 11/2021] 

    Result: 

    DTC B166D, B166E, B167B and B167C are not output 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 11/2021] 

  7. CHECK FLOOR WIRE 
    1. Disconnect the floor wire connector from the front door wire LH.
      GTY972015Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Door Side Airbag Sensor LH
      *2 Side Airbag Sensor Assembly LH
      *3 Front Door Wire LH
      *4 Floor Wire
      *5 Service Wire
      *a Front view of wire harness connector
      (to Front Door Wire LH)
      *b Front view of wire harness connector
      (to Side Airbag Sensor Assembly LH)
    2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    3. Turn the power switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      L228-12 (BDL+) - Body ground Power switch on (IG) Below 1 V
      L228-22 (BDL-) - Body ground Power switch on (IG) Below 1 V
    5. Turn the power switch off.
    6. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
    7. Using a service wire, connect terminals 1 (BDL+) and 2 (BDL-) of connector B.
      NOTE:

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

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      L228-12 (BDL+) - L228-22 (BDL-) Always Below 1 Ω
    9. Disconnect the service wire from connector B.
    10. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      L228-12 (BDL+) - L228-22 (BDL-) Always 1 MΩ or higher
      L228-12 (BDL+) - Body ground Always 1 MΩ or higher
      L228-22 (BDL-) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE FRONT DOOR WIRE LH 

    Result: 

    NG 

    REPLACE FLOOR WIRE 

scientia non olet · About LEMON Manuals