LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2008 >> FJ Cruiser RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 194 (Supplemental Restraint System) >> Airbag System >> DTC B1815/54 Short in Front Passenger Side Squib 2nd Step Circuit; DTC B1816/54 Open in Front Passenger Side Squib 2nd Step Circuit; DTC B1817/54 Short to GND in Front Passenger Side Squib 2nd Step Circuit; DTC B1818/54 Short to B+ in Front Passenger Side Squib 2nd Step Circuit >> 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.

HINT:

  1. CHECK FRONT PASSENGER AIRBAG (FRONT PASSENGER SIDE SQUIB 2ND STEP) 

    SST 09843-18060 

    1. Turn the ignition switch off.
    2. Disconnect the negative (-) terminal cable from the battery and wait for at least 90 seconds.
    3. Disconnect the connectors from the front passenger airbag assembly.
    4. Connect the white wire side of SST (resistance 2.1 Ω) to connector E (black connector).
      CAUTION: Never connect a tester to the front passenger airbag assembly (front passenger side squib 2nd step) for measurement, as this may lead to a serious injury due to airbag deployment.
      NOTE:
      • Do not forcibly insert the SST into the terminals of the connector when connecting.
      • Insert the SST straight into the terminals of the connector.
    5. Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
    6. Turn the ignition switch on and wait for at least 60 seconds.
    7. Clear the DTCs stored in the memory (See DTC CHECK / CLEAR  ).
    8. Turn the ignition switch off.
    9. Turn the ignition switch on and wait for at least 60 seconds.
    10. Check the DTCs (See DTC CHECK / CLEAR  ).
      Fig 1: Checking Front Passenger Airbag (Front Passenger Side Squib 2nd Step)
      G04830113Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: DTC B1815, B1816, B1817, B1818 and 54 are not output. 

      HINT:

      DTCs other than DTC B1815, B1816, B1817, B1818 and 54 may be output at this time, but they are not related to this check.

    OK: REPLACE FRONT PASSENGER AIRBAG 

    NG: GO TO NEXT STEP 

  2. CHECK CONNECTOR 
    1. Turn the ignition switch off.
    2. Disconnect the negative (-) terminal cable from the battery and wait for at least 90 seconds.
    3. Disconnect the SST from connector E.
    4. Check that the instrument panel wire assembly connectors (on the front passenger airbag side) are not damaged.

      OK: The lock button is not disengaged and the claw of the lock is not damaged or deformed. 

    NG: REPAIR OR REPLACE INSTRUMENT PANEL WIRE ASSEMBLY 

    OK: GO TO NEXT STEP 

  3. CHECK FRONT PASSENGER SIDE SQUIB 2ND STEP CIRCUIT 
    1. Disconnect the connectors from the center airbag sensor assembly.
    2. Check for short to B+ in the circuit.
      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
        Q2-2 (P2+) - Body ground Ignition switch on Below 1 V
        Q2-1 (P2-) - Body ground Ignition switch on Below 1 V
    3. Check for open in the circuit.
      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
        Q2-2 (P2+) - Q2-1 (P2-) Always Below 1 Ω
        Fig 2: Checking Front Passenger Side Squib 2nd Step Circuit
        G04830114Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Check for short to ground in the circuit.
      1. Measure the resistance.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        Q2-2 (P2+) - Body ground Always 1 MΩ or higher
        Q2-1 (P2-) - Body ground Always 1 MΩ or higher
    5. Check for short in the circuit.
      1. Release the activation prevention mechanism built into connector B (See DIAGNOSIS SYSTEM  ).
      2. Measure the resistance.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        Q2-2 (P2+) - Q2-1 (P2-) Always 1 MΩ or higher

    NG: Go to step  5

    OK: GO TO NEXT STEP 

  4. CHECK CENTER AIRBAG SENSOR ASSEMBLY 
    1. Connect the connectors to the front passenger airbag assembly and the center airbag sensor assembly.
    2. Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
    3. Turn the ignition switch on and wait for at least 60 seconds.
    4. Clear the DTCs stored in the memory (See DTC CHECK / CLEAR  ).
    5. Turn the ignition switch off.
    6. Turn the ignition switch on and wait for at least 60 seconds.
    7. Check the DTCs (See DTC CHECK / CLEAR  ).

      OK: DTC B1815, B1816, B1817, B1818 and 54 are not output. 

      HINT:

      DTCs other than DTC B1815, B1816, B1817, B1818 and 54 may be output at this time, but they are not related to this check.

      Fig 3: Checking Center Airbag Sensor Assembly
      G04830115Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE CENTER AIRBAG SENSOR ASSEMBLY 

    OK: USE SIMULATION METHOD TO CHECK 

  5. CHECK INSTRUMENT PANEL WIRE 
    1. Check for short to B+ in the circuit.
      1. Restore the released activation prevention mechanism of connector B to the original condition.
      2. Disconnect the instrument panel wire connector from the instrument panel wire assembly.
      3. Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
      4. Turn the ignition switch on.
      5. Measure the voltage.

        Standard voltage 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        DQ1-3 (P2+) - Body ground Ignition switch on Below 1 V
        DQ1-4 (P2-) - Body ground Ignition switch on Below 1 V
        Fig 4: Checking Instrument Panel Wire
        G04830116Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check for open in the circuit.
      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
        DQ1-3 (P2+) - DQ1-4 (P2-) Always Below 1 Ω
    3. Check for short to ground in the circuit.
      1. Measure the resistance.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        DQ1-3 (P2+) - Body ground Always 1 MΩ or higher
        DQ1-4 (P2-)-Body ground Always 1 MΩ or higher
    4. Check for short in the circuit.
      1. Release the activation prevention mechanism built into connector B (See DIAGNOSIS SYSTEM  ).
      2. Measure the resistance.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        DQ1-3 (P2+) - DQ1-4 (P2-) Always 1 MΩ or higher

    NG: REPAIR OR REPLACE INSTRUMENT PANEL WIRE 

    OK: GO TO NEXT STEP 

  6. CHECK INSTRUMENT PANEL WIRE ASSEMBLY 
    1. Check for short to B+ in the circuit.
      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
        Q2-2 (P2+) - Body ground Ignition switch on Below 1 V
        Q2-1 (P2-) - Body ground Ignition switch on Below 1 V
    2. Check for open in the circuit.
      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
        Q2-2 (P2+) - Q2-1 (P2-) Always Below 1 Ω
        Fig 5: Checking Instrument Panel Wire Assembly
        G04830117Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check for short to ground in the circuit.
      1. Measure the resistance.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        Q2-2 (P2+) - Body ground Always 1 MΩ or higher
        Q2-1 (P2-) - Body ground Always 1 MΩ or higher
    4. Check for short in the circuit.
      1. Release the activation prevention mechanism built into connector D (See DIAGNOSIS SYSTEM  ).
      2. Measure the resistance.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        Q2-2 (P2+) - Q2-1 (P2-) Always 1 MΩ or higher

    NG: REPAIR OR REPLACE INSTRUMENT PANEL WIRE ASSEMBLY 

    OK: USE SIMULATION METHOD TO CHECK 

scientia non olet · About LEMON Manuals