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Home >> Toyota >> 2008 >> FJ Cruiser RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 140 (Supplemental Restraint System) >> Airbag System >> DTC B1643/81 Driver Side Satellite Sensor Bus Initialization Incomplete >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR DTC 
    1. Turn the ignition switch ON, and wait for at least 60 seconds.
    2. Clear the DTCs (see DTC CHECK / CLEAR ).
    3. Turn the ignition switch OFF.
    4. Turn the ignition switch ON, and wait for at least 60 seconds.
    5. Check the DTCs (see DTC CHECK / CLEAR ).

    OK: 

    DTC B1622/81 is not output. 

    DTC B1632/81 is not output. 

    HINT:

    DTCs other than DTC B1622/81 and B1632/81 may be output at this time, but they are not related to this check.

    NG:  GO TO DIAGNOSTIC TROUBLE CODE CHART 

    Fig 1: Checking DTC
    G05184423Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO to Next Step 

  2. CHECK CONNECTION OF CONNECTOR 
    1. Turn the ignition switch OFF.
    2. Disconnect the cable from the negative (-) terminal battery, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the center airbag sensor, rear airbag sensor LH and the side airbag sensor LH.

    OK: The connectors are properly connected. 

    NG: CONNECT CONNECTOR 

    OK: GO to Next Step 

  3. CHECK FLOOR WIRE (OPEN) 
    1. Disconnect the connectors from the center airbag sensor and the side airbag sensor LH.
    2. Using a service wire, connect K9-4 (BBL+) and K9-3 (BBL-) of connector C.
      NOTE: Do not forcibly insert the service wire into the terminals of the connector when connecting.
    3. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      K1-24 (BBD+) - K1-23 (BBD-) Below 1 Ω

    NG: REPAIR OR REPLACE FLOOR WIRE 

    Fig 2: Checking Floor Wire (Open)
    G05184383Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO to Next Step 

  4. CHECK FLOOR WIRE (SHORT) 
    1. Disconnect the service wire from connector C.
    2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      K1-24 (BBD+) - K1-23 (BBD-) 1 MΩ or higher

    NG: REPAIR OR REPLACE FLOOR WIRE 

    Fig 3: Checking Floor Wire (Short)
    G05184384Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO to Next Step 

  5. CHECK FLOOR WIRE (TO B+) 
    1. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
    2. Turn the ignition switch ON.
    3. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      K1-24 (BBD+) - Body ground Below 1 V
      K1-23 (BBD-) - Body ground Below 1 V

    NG: REPAIR OR REPLACE FLOOR WIRE 

    Fig 4: Checking Floor Wire (To B+)
    G05184384Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO to Next Step 

  6. CHECK FLOOR WIRE (TO GROUND) 
    1. Turn the ignition switch OFF.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      K1-24 (BBD+) - Body ground 1 MΩ or higher
      K1-23 (BBD-) - Body ground 1 MΩ or higher

    NG: REPAIR OR REPLACE FLOOR WIRE 

    Fig 5: Checking Floor Wire (To Ground)
    G05184384Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO to Next Step 

  7. CHECK FLOOR WIRE (OPEN) 
    1. Disconnect the connectors from the side airbag sensor LH and the rear airbag sensor LH.
    2. Using a service wire, connect K11-1 (BCL-) and K11-2 (BCL+) of connector C.
      NOTE: Do not forcibly insert the service wire into the terminals of the connector when connecting.
    3. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      K9-1 (BCL+) - K9-2 (BCL-) Below 1 Ω

    NG: REPAIR OR REPLACE FLOOR WIRE 

    Fig 6: Checking Floor Wire (Open)
    G05184428Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO to Next Step 

  8. CHECK FLOOR WIRE (SHORT) 
    1. Disconnect the service wire from connector C.
    2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      K9-1 (BCL+) - K9-2 (BCL-) 1 MΩ or higher

    NG: REPAIR OR REPLACE FLOOR WIRE 

    Fig 7: Checking Floor Wire (Short)
    G05184394Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO to Next Step 

  9. CHECK FLOOR WIRE (TO B+) 
    1. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
    2. Turn the ignition switch ON.
    3. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      K9-1 (BCL+) - Body ground Below 1 V
      K9-2 (BCL-) - Body ground Below 1 V

    NG: REPAIR OR REPLACE FLOOR WIRE 

    Fig 8: Checking Floor Wire (To B+)
    G05184394Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO to Next Step 

  10. CHECK FLOOR WIRE (TO GROUND) 
    1. Turn the ignition switch OFF.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      K9-1 (BCL+) - Body ground 1 MΩ or higher
      K9-2 (BCL-) - Body ground 1 MΩ or higher

    NG: REPAIR OR REPLACE FLOOR WIRE 

    Fig 9: Checking Floor Wire (To Ground)
    G05184394Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO to Next Step 

  11. CHECK SIDE AIRBAG SENSOR LH 
    1. Connect the connectors to the center airbag sensor.
    2. Interchange the side airbag sensor LH with the side airbag sensor RH and connect the connectors to them.
    3. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
    4. Turn the ignition switch ON, and wait for at least 60 seconds.
    5. Clear the DTCs (see DTC CHECK / CLEAR ).
    6. Turn the ignition switch OFF.
    7. Turn the ignition switch ON, and wait for at least 60 seconds.
    8. Check the DTCs (see DTC CHECK / CLEAR ).

      Result 

      RESULT CHART

      Result Proceed to
      DTC B1643/81 and B1648/82 are not output A
      DTC B1643/81 is output B
      DTC B1648/82 is output C

      HINT:

      DTCs other than DTC B1643/81 and B1648/82 may be output at this time, but they are not related to this check.

    Fig 10: Checking Side Airbag Sensor LH
    G05184432Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    B: REPLACE CENTER AIRBAG SENSOR ASSEMBLY 

    C: REPLACE SIDE AIRBAG SENSOR LH 

    A: GO to Next Step 

  12. CHECK REAR AIRBAG SENSOR LH 
    1. Turn the ignition switch OFF.
    2. Disconnect the cable from the negative (-) terminal battery, and wait for at least 90 seconds.
    3. Interchange the rear airbag sensor LH with the rear airbag sensor RH and connect the connectors to them.
    4. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
    5. Turn the ignition switch ON, and wait for at least 60 seconds.
    6. Clear the DTCs (see DTC CHECK / CLEAR ).
    7. Turn the ignition switch OFF.
    8. Turn the ignition switch ON, and wait for at least 60 seconds.
    9. Check the DTCs (see DTC CHECK / CLEAR ).

      Result 

      RESULT CHART

      Result Proceed to
      DTC B1643/81 and B1648/82 are not output A
      DTC B1643/81 is output B
      DTC B1648/82 is output C
    Fig 11: Checking Rear Airbag Sensor LH
    G05184433Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    DTCs other than DTC B1643/81 and B1648/82 may be output at this time, but they are not related to this check.

    B: REPLACE CENTER AIRBAG SENSOR ASSEMBLY 

    C: REPLACE REAR AIRBAG SENSOR LH 

    A: USE SIMULATION METHOD TO CHECK 

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