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Home >> Toyota >> 2008 >> FJ Cruiser RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 194 (Supplemental Restraint System) >> Airbag System >> DTC B1615/14 Front Airbag Sensor LH Circuit Malfunction >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: In order to prevent unexpected airbag deployment, disconnect the following connectors before inspecting parts such as wire harnesses, if the application of tester probes to the center airbag sensor assembly connector is necessary.
  1. Turn the ignition switch to the lock position.
  2. Disconnect the negative (-) terminal cable from the battery and wait for at least 90 seconds.
  3. Disconnect the connector from the center airbag sensor assembly.
  4. Disconnect the connectors from the steering pad.
  5. Disconnect the connectors from the front passenger airbag assembly.
  6. Disconnect the connector from the front seat outer belt assembly LH.
  7. Disconnect the connector from the front seat outer belt assembly RH.

    HINT:

    Skip the following steps if side and curtain shield airbags are not fitted.

  8. Disconnect the connector from the front seat side airbag assembly LH.
  9. Disconnect the connector from the front seat side airbag assembly RH.
  10. Disconnect the connector from the curtain shield airbag assembly LH.
  11. Disconnect the connector from the curtain shield airbag assembly RH.
  1. CHECK DTC 
    1. Turn the ignition switch on and wait for at least 60 seconds.
    2. Clear the DTCs stored in the memory (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 B1615/14 is not output. 

      HINT:

      DTCs other than DTC B1615/14 may be output at this time, but they are not related to this check.

      6. Fig 1: Checking DTC
      G04829995Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: USE SIMULATION METHOD TO CHECK 

    NG: GO TO NEXT STEP 

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

      OK: 

      The connectors are properly connected. 

    NG: CONNECT CONNECTORS 

    OK: GO TO NEXT STEP 

  3. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (FOR OPEN) 
    1. Disconnect the connectors from the center airbag sensor assembly and the front airbag sensor LH.
    2. Using a service wire, connect A12-1 and A12-2 of connector E.
      NOTE: Do not forcibly insert the service wire into the terminals of the connector when connecting.
    3. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      D16-30 (+SL) - D16-28 (-SL) Always Below 1 Ω
      4. Fig 2: Checking Front Airbag Sensor LH Circuit (For Open)
      G04829996Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: Go to step  8

    OK: GO TO NEXT STEP 

  4. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (FOR SHORT) 
    1. Disconnect the service wire from connector E.
    2. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      D16-30 (+SL) - D16-28 (-SL) Always 1 MΩ or higher
      3. Fig 3: Checking Front Airbag Sensor LH Circuit (For Open)
      G04829997Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: Go to step  9

    OK: GO TO NEXT STEP 

  5. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (TO B+) 
    1. Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
    2. Turn the ignition switch on.
    3. Measure the voltage.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      D16-30 (+SL) - Body ground Ignition switch on Below 1 V
      D16-28 (-SL) - Body ground Ignition switch on Below 1 V
      4. Fig 4: Checking Front Airbag Sensor LH Circuit (For Open)
      G04829997Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: Go to step  10

    OK: GO TO NEXT STEP 

  6. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (TO GROUND) 
    1. Turn the ignition switch off.
    2. Disconnect the negative (-) terminal cable from the battery and wait for at least 90 seconds.
    3. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      D16-30 (+SL) - Body ground Always 1 MΩ or higher
      D16-28 (-SL) - Body ground Always 1 MΩ or higher
      4. Fig 5: Checking Front Airbag Sensor LH Circuit (For Open)
      G04829997Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: Go to step  11

    OK: GO TO NEXT STEP 

  7. CHECK FRONT AIRBAG SENSOR LH 
    1. Connect the connectors to the center airbag sensor assembly.
    2. Interchange the front airbag sensor LH with RH and connect the connectors to them.
    3. Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
    4. Turn the ignition switch on and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory (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 B1615/14 is output. A
      DTC B1610/13 is output. B
      DTC B1610/13 and B1615/14 are not output. C
      Fig 6: Checking Front Airbag Sensor LH
      G04830000Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      DTCs other than DTC B1610/13 and B1615/14 may be output at this time, but they are not related to this check.

    A: REPLACE CENTER AIRBAG SENSOR ASSEMBLY 

    B: REPLACE FRONT AIRBAG SENSOR LH 

    C: USE SIMULATION METHOD TO CHECK 

  8. CHECK ENGINE ROOM MAIN WIRE (FOR OPEN) 
    1. Disconnect the engine room main wire connector from the instrument panel wire.

      HINT:

      The service wire has already been inserted into connector E.

    2. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      AD1-3 (+SL) - AD1-4 (-SL) Always Below 1 Ω
      3. Fig 7: Checking Engine Room Main Wire (For Open)
      G04830001Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE ENGINE ROOM MAIN WIRE 

    OK: REPAIR OR REPLACE INSTRUMENT PANEL WIRE 

  9. CHECK ENGINE ROOM MAIN WIRE (FOR SHORT) 
    1. Disconnect the service wire from connector E.
    2. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      AD1-3 (+SL) - AD1-4 (-SL) Always 1 MΩ or higher
      3. Fig 8: Checking Engine Room Main Wire (For Short)
      G04830002Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE ENGINE ROOM MAIN WIRE 

    OK: REPAIR OR REPLACE INSTRUMENT PANEL WIRE 

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

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      AD1-3 (+SL) - Body ground Ignition switch on Below 1 V
      AD1-4 (-SL) - Body ground Ignition switch on Below 1 V
      7. Fig 9: Checking Engine Room Main Wire (For Short)
      G04830002Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE ENGINE ROOM MAIN WIRE 

    OK: REPAIR OR REPLACE INSTRUMENT PANEL WIRE 

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

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      AD1-3 (+SL) - Body ground Always 1 MΩ or higher
      AD1-4 (-SL) - Body ground Always 1 MΩ or higher
      3. Fig 10: Checking Engine Room Main Wire (For Short)
      G04830002Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE ENGINE ROOM MAIN WIRE 

    OK: REPAIR OR REPLACE INSTRUMENT PANEL WIRE 

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