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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 B1805/52 Short in Front Passenger Side Squib Circuit; DTC B1806/52 Open in Front Passenger Side Squib Circuit; DTC B1807/52 Short to GND in Front Passenger Side Squib Circuit; DTC B1808/52 Short to B+ in Front Passenger Side Squib 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) 

    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 (orange connector).
      CAUTION: Never connect a tester to the front passenger airbag assembly (front passenger side squib) 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  ).

      OK: DTC B1805, B1806, B1807, B1808 and 52 are not output. 

      Fig 1: Checking Front Passenger Airbag (Front Passenger Side Squib)
      G04830101Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      DTCs other than DTC B1805, B1806, B1807, B1808 and 52 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 deformed or damaged. 

    NG: REPAIR OR REPLACE INSTRUMENT PANEL WIRE ASSEMBLY 

    OK: GO TO NEXT STEP 

  3. CHECK FRONT PASSENGER SIDE SQUIB CIRCUIT 
    1. Disconnect the connectors from the center airbag sensor assembly and front passenger airbag 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
        Q1-2 (P+) - Body ground Ignition switch on Below 1 V
        Q1-1 (P-) - 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
        Q1-2 (P+)-Q1-1(P-) Always Below 1 Ω
        Fig 2: Checking Front Passenger Side Squib Circuit
        G04830102Courtesy 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
        Q1-2 (P+) - Body ground Always 1 MΩ or higher
        Q1-1 (P-) - 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
        Q1-2 (P+) - Q1-1 (P-) 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 B1805, B1806, B1807, B1808 and 52 are not output. 

      HINT:

      DTCs other than DTC B1805, B1806, B1807, B1808 and 52 may be output at this time, but they are not related to this check.

      Fig 3: Checking Center Airbag Sensor Assembly
      G04830103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE CENTER AIRBAG SENSOR ASSEMBLY 

    OK: USE SIMULATION METHOD TO CHECK 

  5. CHECK INSTRUMENT PANEL WIRE 
    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. 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
        DQ1-1 (P+) - Body ground Ignition switch on Below 1 V
        DQ1-2 (P-) - Body ground Ignition switch on Below 1 V
    4. 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.
        Fig 4: Checking Instrument Panel Wire
        G04830104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        DQ1-1 (P+) - DQ1-2 (P-) Always Below 1 Ω
    5. Check for short to ground in the circuit.
      1. Measure the resistance.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        DQ1-1 (P+) - Body ground Always 1 MΩ or higher
        DQ1-2 (P-) - Body ground Always 1 MΩ or higher
    6. 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
        DQ1-1 (P+) - DQ1-2 (P-) 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
        Q1-2 (P+) - Body ground Ignition switch on Below 1 V
        Q1-1 (P-) - 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
        Q1-2 (P+) - Q1-1 (P-) Always Below 1 Ω
        Fig 5: Checking Instrument Panel Wire Assembly
        G04830105Courtesy 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
        Q1-2 (P+) - Body ground Always 1 MΩ or higher
        Q1-1 (P-) - 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
        Q1-2 (P+) - Q1 - 1 (P-) Always 1 MΩ or higher

    NG: REPAIR OR REPLACE INSTRUMENT PANEL WIRE ASSEMBLY 

    OK: USE SIMULATION METHOD TO CHECK 

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