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Home >> Toyota >> 2018 >> 4Runner TRD Pro >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (B1690-B1905) & Symptom Tests >> Airbag System >> DTC B1693: Side Airbag Sensor RH Initialization Incomplete; DTC B1698: Side Airbag Sensor LH Initialization Incomplete [08/2019 - ] >> Procedure

DTC B1693: Side Airbag Sensor RH Initialization Incomplete; DTC B1698: Side Airbag Sensor LH Initialization Incomplete [08/2019 - ]: Procedure

  1. CHECK PAST DTC 
    1. Turn the ignition switch to ON, and wait for at least 60 seconds.
    2. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2019 - ] ).

      OK

      DTC B1692 and B1697 are not output.

    Result: 

    NG 

    GO TO DTC B1692 

    (Refer to DTC B1692: Lost Communication with Side Airbag Sensor RH; DTC B1697: Lost Communication with Side Airbag Sensor LH [08/2019 - ] )

    Result: 

    OK 

    See step  2

  2. CHECK FOR DTC 
    1. Turn the ignition switch to ON.
    2. Clear the DTCs stored in memory (Refer to DTC CHECK / CLEAR [08/2019 - ] ).
    3. Turn the ignition switch off.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2019 - ] ).
      RESULT

      Result Proceed to
      DTC B1693 is output A
      DTC B1698 is output B
      DTC B1693 and B1698 are not output C

      HINT: 

      Codes other than DTC B1693 and B1698 may be output at this time, but they are not related to this check.

    Result: 

    B 

    See step  9

    Result: 

    C 

    USE SIMULATION METHOD TO CHECK 

    (Refer to DIAGNOSIS SYSTEM [08/2019 - ] )

    Result: 

    A 

    See step  3

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

      OK

      The connectors are properly connected.

    Result: 

    NG 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    OK 

    See step  4

  4. CHECK CONNECTORS 
    1. Disconnect the connectors from the airbag sensor assembly, rear airbag sensor RH and side airbag sensor RH.
    2. Check that the connectors (on the airbag sensor assembly side, rear airbag sensor RH side and side airbag sensor RH side) are not damaged.

      OK

      The connectors are not deformed or damaged.

      GTY651386Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Rear Airbag Sensor RH
      *2 Side Airbag Sensor RH
      *3 Airbag Sensor Assembly

    Result: 

    NG 

    REPLACE HARNESS AND CONNECTOR 

    Result: 

    OK 

    See step  5

  5. CHECK REAR AIRBAG SENSOR RH 
    1. Connect the connectors to the airbag sensor assembly and side airbag sensor RH.
      GTY538320Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Interchange the rear airbag sensor LH with 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 to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in memory (Refer to DTC CHECK / CLEAR [08/2019 - ] ).
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2019 - ] ).
      RESULT

      Result Proceed to
      DTC B1693 is output A
      DTC B1698 is output B
      DTC B1693 and B1698 are not output C

      HINT: 

      Codes other than DTC B1693 and B1698 may be output at this time, but they are not related to this check.

      TEXT IN ILLUSTRATION

      *1 Rear Airbag Sensor LH
      *2 Airbag Sensor Assembly
    9. Turn the ignition switch off.
    10. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    11. Return the rear airbag sensor RH and LH to their original positions and connect the connectors to them.

    Result: 

    B 

    REPLACE REAR AIRBAG SENSOR RH 

    (Refer to REMOVAL [08/2015 - ] )

    Result: 

    C 

    USE SIMULATION METHOD TO CHECK 

    (Refer to DIAGNOSIS SYSTEM [08/2019 - ] )

    Result: 

    A 

    See step  6

  6. CHECK SIDE AIRBAG SENSOR RH CIRCUIT 
    1. Disconnect the connectors from the rear airbag sensor RH and side airbag sensor RH.
      GTY693583Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Side Airbag Sensor RH *2 Rear Airbag Sensor RH
      *3 Connector E *4 Connector B
      *5 Service Wire - -
      *a Rear view of wire harness connector
      (to Side Airbag Sensor RH)      		 *b Rear view of wire harness connector
      (to Rear Airbag Sensor RH)
    2. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      N9-1 (BCR+) - Body ground Ignition switch ON Below 1 V
      N9-2 (BCR-) - Body ground Ignition switch ON Below 1 V
    4. Turn the ignition switch off.
    5. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    6. Using a service wire, connect terminals 2 (BCR+) and 1 (BCR-) of connector E.
      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
      N9-1 (BCR+) - N9-2 (BCR-) Always Below 1 Ω
    8. Disconnect the service wire from connector E.
    9. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N9-1 (BCR+) - N9-2 (BCR-) Always 1 MΩ or higher
      N9-1 (BCR+) - Body ground Always 1 MΩ or higher
      N9-2 (BCR-) - Body ground Always 1 MΩ or higher

    Result: 

    NG 

    See step  8

    Result: 

    OK 

    See step  7

  7. CHECK SIDE AIRBAG SENSOR RH 
    1. Connect the connector to the rear airbag sensor RH.
      GTY529612Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Interchange the side airbag sensor LH with 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 to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in memory (Refer to DTC CHECK / CLEAR [08/2019 - ] ).
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2019 - ] ).
      RESULT

      Result Proceed to
      DTC B1693 is output A
      DTC B1698 is output B
      DTC B1693 and B1698 are not output C

      HINT: 

      Codes other than DTC B1693 and B1698 may be output at this time, but they are not related to this check.

      TEXT IN ILLUSTRATION

      *1 Side Airbag Sensor LH
      *2 Rear Airbag Sensor RH
    9. Turn the ignition switch off.
    10. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    11. Return the side airbag sensor RH and LH to their original positions and connect the connectors to them.

    Result: 

    A 

    REPLACE AIRBAG SENSOR ASSEMBLY 

    (Refer to REMOVAL [08/2015 - ] )

    Result: 

    B 

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH 

    (Refer to REMOVAL [08/2015 - ] )

    Result: 

    C 

    USE SIMULATION METHOD TO CHECK 

    (Refer to DIAGNOSIS SYSTEM [08/2019 - ] )

  8. CHECK FLOOR WIRE (REAR AIRBAG SENSOR RH - FRONT DOOR WIRE RH) 
    1. Disconnect the floor wire connector from the front door wire RH.
      GTY725620Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Side Airbag Sensor RH *2 Rear Airbag Sensor RH
      *3 Front Door Wire RH *4 Floor Wire
      *5 Connector C *6 Connector B
      *7 Service Wire - -
      *a Front view of wire harness connector
      (to Front Door Wire RH)      		 *b Rear view of wire harness connector
      (to Rear Airbag Sensor RH)
    2. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      N9-1 (BCR+) - Body ground Ignition switch ON Below 1 V
      N9-2 (BCR-) - Body ground Ignition switch ON Below 1 V
    4. Turn the ignition switch off.
    5. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    6. Using a service wire, connect terminals 2 (BCR+) and 1 (BCR-) of connector C.
      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
      N9-1 (BCR+) - N9-2 (BCR-) Always Below 1 Ω
    8. Disconnect the service wire from connector C.
    9. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N9-1 (BCR+) - N9-2 (BCR-) Always 1 MΩ or higher
      N9-1 (BCR+) - Body ground Always 1 MΩ or higher
      N9-2 (BCR-) - Body ground Always 1 MΩ or higher

    Result: 

    OK 

    REPLACE FRONT DOOR WIRE RH 

    Result: 

    NG 

    REPLACE FLOOR WIRE 

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

      OK

      The connectors are properly connected.

    Result: 

    NG 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    OK 

    See step  10

  10. CHECK CONNECTORS 
    1. Disconnect the connectors from the airbag sensor assembly, rear airbag sensor LH and side airbag sensor LH.
    2. Check that the connectors (on the airbag sensor assembly side, rear airbag sensor LH side and side airbag sensor LH side) are not damaged.

      OK

      The connectors are not deformed or damaged.

      GTY668362Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Rear Airbag Sensor LH
      *2 Side Airbag Sensor LH
      *3 Airbag Sensor Assembly

    Result: 

    NG 

    REPLACE HARNESS AND CONNECTOR 

    Result: 

    OK 

    See step  11

  11. CHECK REAR AIRBAG SENSOR LH 
    1. Connect the connectors to the airbag sensor assembly and side airbag sensor LH.
      GTY312150Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Interchange the rear airbag sensor LH with 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 to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in memory (Refer to DTC CHECK / CLEAR [08/2019 - ] ).
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2019 - ] ).
      RESULT

      Result Proceed to
      DTC B1698 is output A
      DTC B1693 is output B
      DTC B1693 and B1698 are not output C

      HINT: 

      Codes other than DTC B1693 and B1698 may be output at this time, but they are not related to this check.

      TEXT IN ILLUSTRATION

      *1 Rear Airbag Sensor RH
      *2 Airbag Sensor Assembly
    9. Turn the ignition switch off.
    10. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    11. Return the rear airbag sensor RH and LH to their original positions and connect the connectors to them.

    Result: 

    B 

    REPLACE REAR AIRBAG SENSOR LH 

    (Refer to REMOVAL [08/2015 - ] )

    Result: 

    C 

    USE SIMULATION METHOD TO CHECK 

    (Refer to DIAGNOSIS SYSTEM [08/2019 - ] )

    Result: 

    A 

    See step  12

  12. CHECK SIDE AIRBAG SENSOR LH CIRCUIT 
    1. Disconnect the connectors from the rear airbag sensor LH and side airbag sensor LH.
      GTY699743Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Side Airbag Sensor LH *2 Rear Airbag Sensor LH
      *3 Connector E *4 Connector B
      *5 Service Wire - -
      *a Rear view of wire harness connector
      (to Side Airbag Sensor LH)      		 *b Rear view of wire harness connector
      (to Rear Airbag Sensor LH)
    2. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      O8-1 (BCL+) - Body ground Ignition switch ON Below 1 V
      O8-2 (BCL-) - Body ground Ignition switch ON Below 1 V
    4. Turn the ignition switch off.
    5. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    6. Using a service wire, connect terminals 2 (BCL+) and 1 (BCL-) of connector E.
      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
      O8-1 (BCL+) - O8-2 (BCL-) Always Below 1 Ω
    8. Disconnect the service wire from connector E.
    9. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O8-1 (BCL+) - O8-2 (BCL-) Always 1 MΩ or higher
      O8-1 (BCL+) - Body ground Always 1 MΩ or higher
      O8-2 (BCL-) - Body ground Always 1 MΩ or higher

    Result: 

    NG 

    See step  14

    Result: 

    OK 

    See step  13

  13. CHECK SIDE AIRBAG SENSOR LH 
    1. Connect the connector to the rear airbag sensor LH.
      GTY529612Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Interchange the side airbag sensor LH with 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 to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in memory (Refer to DTC CHECK / CLEAR [08/2019 - ] ).
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2019 - ] ).
      RESULT

      Result Proceed to
      DTC B1698 is output A
      DTC B1693 is output B
      DTC B1693 and B1698 are not output C

      HINT: 

      Codes other than DTC B1693 and B1698 may be output at this time, but they are not related to this check.

      TEXT IN ILLUSTRATION

      *1 Side Airbag Sensor RH
      *2 Rear Airbag Sensor LH
    9. Turn the ignition switch off.
    10. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    11. Return the side airbag sensor RH and LH to their original positions and connect the connectors to them.

    Result: 

    A 

    REPLACE AIRBAG SENSOR ASSEMBLY 

    (Refer to REMOVAL [08/2015 - ] )

    Result: 

    B 

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH 

    (Refer to REMOVAL [08/2015 - ] )

    Result: 

    C 

    USE SIMULATION METHOD TO CHECK 

    (Refer to DIAGNOSIS SYSTEM [08/2019 - ] )

  14. CHECK NO. 2 FLOOR WIRE (REAR AIRBAG SENSOR LH - FRONT DOOR WIRE LH) 
    1. Disconnect the No. 2 floor wire connector from the front door wire LH.
      GTY686800Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Side Airbag Sensor LH *2 Rear Airbag Sensor LH
      *3 Front Door Wire LH *4 No. 2 Floor Wire
      *5 Connector C *6 Connector B
      *7 Service Wire - -
      *a Front view of wire harness connector
      (to Front Door Wire LH)      		 *b Rear view of wire harness connector
      (to Rear Airbag Sensor LH)
    2. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      O8-1 (BCL+) - Body ground Ignition switch ON Below 1 V
      O8-2 (BCL-) - Body ground Ignition switch ON Below 1 V
    4. Turn the ignition switch off.
    5. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    6. Using a service wire, connect terminals 2 (BCL+) and 1 (BCL-) of connector C.
      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
      O8-1 (BCL+) - O8-2 (BCL-) Always Below 1 Ω
    8. Disconnect the service wire from connector C.
    9. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O8-1 (BCL+) - O8-2 (BCL-) Always 1 MΩ or higher
      O8-1 (BCL+) - Body ground Always 1 MΩ or higher
      O8-2 (BCL-) - Body ground Always 1 MΩ or higher

    Result: 

    OK 

    REPLACE FRONT DOOR WIRE LH 

    Result: 

    NG 

    REPLACE NO. 2 FLOOR WIRE 

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