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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 B1607/84 Lost Communication with Front Satellite Sensor Bus LH; DTC B1608/84 Front Satellite Sensor Bus LH Initialization Incomplete; DTC B1617/84 Lost Communication with Front Airbag Sensor LH; DTC B1618/84 Front Airbag Sensor LH 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 CONNECTION OF CONNECTOR 
    1. Turn the ignition switch OFF.
    2. Disconnect the cable from the negative (-) terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the center airbag sensor and the front airbag sensor LH.

    OK: The connectors are properly connected. 

    NG: CONNECT CONNECTOR 

    OK: GO to Next Step 

  2. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (OPEN) 
    1. Disconnect the connectors from the center airbag sensor and the front airbag sensor LH.
    2. Using a service wire, connect A15-2 (+SL) and A15-1 (-SL) of connector E.
      NOTE: Do not forcibly insert a 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
      E45-30 (+SL) - E45-28 (-SL) Below 1 Ω

    NG: GO to step  7

    Fig 1: Checking Front Airbag Sensor LH Circuit (Open)
    G05184367Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO to Next Step 

  3. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (SHORT) 
    1. Disconnect the service wire from connector E.
    2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      E45-30 (+SL) - E45-28 (-SL) 1 MΩ or higher

    NG: GO to step  8

    Fig 2: Checking Front Airbag Sensor LH Circuit (Short)
    G05184368Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO to Next Step 

  4. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (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 connectors.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      E45-30 (+SL) - Body ground Below 1 V
      E45-28 (-SL) - Body ground Below 1 V

    NG: GO to step  9

    Fig 3: Checking Front Airbag Sensor LH Circuit (To B+)
    G05184369Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO to Next Step 

  5. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (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
      E45-30 (+SL) - Body ground 1 MΩ or higher
      E45-28 (-SL) - Body ground 1 MΩ or higher

    NG: GO to step  10

    Fig 4: Checking Front Airbag Sensor LH Circuit (To Ground)
    G05184370Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO to Next Step 

  6. CHECK FRONT AIRBAG SENSOR LH 
    1. Connect the connectors to the center airbag sensor.
    2. Interchange the front airbag sensor RH and LH, 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 B1602/83, B1603/83, B1612/83, B1613/83, B1607/84, B1608/84, B1617/ 84 and B1618/84 are not output. A
      DTC B1607/84, B1608/84, B1617/84 and B1618/84 are output B
      DTC B1602/83, B1603/83, B1612/83 and B1613/83 are output C
    Fig 5: Checking Front Airbag Sensor LH
    G05184371Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    DTCs other than B1602/83, B1603/83, B1612/83, B1613/83, B1607/84, B1608/84, B1617/84 and B1618/ 84 may be output at this time, but they are not related to this check.

    B: REPLACE CENTER AIRBAG SENSOR ASSEMBLY 

    C: REPLACE FRONT AIRBAG SENSOR LH 

    A: USE SIMULATION METHOD TO CHECK 

  7. CHECK ENGINE ROOM MAIN WIRE (OPEN) 
    1. Disconnect the service wire from connector E.
    2. Disconnect the engine room main wire connector from the instrument panel wire.
    3. Using a service wire, connect AE5-1 (+SL) and AE5-2 (-SL) of connector D.
      NOTE: Do not forcibly insert a service wire into the terminals of the connector when connecting.
    4. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      A15-2(+SL)-A15-1(-SL) Below 1 Ω

    NG: REPAIR OR REPLACE ENGINE ROOM MAIN WIRE 

    Fig 6: Checking Engine Room Main Wire (Open)
    G05184372Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPAIR OR REPLACE INSTRUMENT PANEL WIRE 

  8. CHECK ENGINE ROOM MAIN WIRE (SHORT) 
    1. Disconnect the engine room main wire connector from the instrument panel wire.
    2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      AE5-1 (+SL) - AE5-2 (-SL) 1 MΩ or higher

    NG: REPAIR OR REPLACE ENGINE ROOM MAIN WIRE 

    Fig 7: Checking Engine Room Main Wire (Short)
    G05184373Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPAIR OR REPLACE INSTRUMENT PANEL WIRE 

  9. CHECK ENGINE ROOM MAIN WIRE (TO B+) 
    1. Turn the ignition switch OFF.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect the engine room main wire connector from the instrument panel wire.
    4. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
    5. Turn the ignition switch ON.
    6. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      AE5-1 (+SL) - Body ground Below 1 V
      AE5-2 (-SL) - Body ground Below 1 V

    NG: REPAIR OR REPLACE ENGINE ROOM MAIN WIRE 

    Fig 8: Checking Engine Room Main Wire (To B+)
    G05184373Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPAIR OR REPLACE INSTRUMENT PANEL WIRE 

  10. CHECK ENGINE ROOM MAIN WIRE (TO GROUND) 
    1. Disconnect the engine room main wire connector from the instrument panel wire.
    2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      AE5-1 (+SL) - Body ground 1 MΩ or higher
      AE5-2 (-SL) - Body ground 1 MΩ or higher

    NG: REPAIR OR REPLACE ENGINE ROOM MAIN WIRE 

    Fig 9: Checking Engine Room Main Wire (To Ground)
    G05184373Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPAIR OR REPLACE INSTRUMENT PANEL WIRE 

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