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Home >> Lexus >> 2013 >> GS 450h >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System (Diagnostic Codes (B1692/81 - B1928/78) & Symptom Tests) >> 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 >> Procedure

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: Procedure

  1. CHECK INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB) 
    1. Turn the power switch off.
      GTY418486Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
    3. Disconnect the connectors from the instrument panel passenger airbag.
    4. Connect the white wire side of SST (resistance: 2.1 Ω) to connector E (orange connector).
      WARNING:

      Never connect the tester to the instrument panel passenger airbag (front passenger side squib) for measurement, as this may lead to a serious injury due to airbag deployment.

      NOTE:
      • Do not forcibly insert SST into the terminals of the connector when connecting SST.
      • Insert SST straight into the terminals of the connector.
      • SST: 09843-18061 
    5. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    6. Turn the power switch on (IG), and wait for at least 60 seconds.
    7. Clear the DTCs. Refer to DTC CHECK / CLEAR [03/2012 - ] .
    8. Turn the power switch off.
    9. Turn the power switch on (IG), and wait for at least 60 seconds.
    10. Check for DTCs. Refer to DTC CHECK / CLEAR [03/2012 - ] .

      OK

      DTC B1805/52, B1806/52, B1807/52 or B1808/52 is not output.

      HINT: 

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

      TEXT IN ILLUSTRATION

      *1 Front Passenger Side Squib
      *2 Center Airbag Sensor Assembly
      *3 Connector E
      *4 SST
      *a Front view of wire harness connector
      (to Front Passenger Side Squib)
      *b Color: Orange

    NG → See step   2 

    OK → See step   6 

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

      OK

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

      GTY367659Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Front Passenger Side Squib
      *2 Center Airbag Sensor Assembly

    NG → REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  3. CHECK FRONT PASSENGER SIDE SQUIB CIRCUIT 
    1. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
      GTY405628Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the power switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      s1-2 (P+) - Body ground Power switch on (IG) Below 1 V
      s1-1 (P-) - Body ground Power switch on (IG) Below 1 V
    4. Turn the power switch off.
    5. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      s1-2 (P+) - s1-1 (P-) Always Below 1 Ω
    7. Release the activation prevention mechanism built into connector B. Refer to DIAGNOSIS SYSTEM [03/2012 - ] .
    8. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      s1-2 (P+) - s1-1 (P-) Always 1 MΩ or higher
      s1-2 (P+) - Body ground Always 1 MΩ or higher
      s1-1 (P-) - Body ground Always 1 MΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front Passenger Side Squib
      *2 Center Airbag Sensor Assembly
      *3 Connector E
      *a Front view of wire harness connector
      (to Front Passenger Side Squib)
      *b Color: Orange
    9. Restore the released activation prevention mechanism of connector B to its original condition.

    NG → See step   5 

    OK: Go to next step 

  4. CHECK CENTER AIRBAG SENSOR ASSEMBLY 
    1. Connect the connectors to the instrument panel passenger airbag and center airbag sensor assembly.
      GTY407554Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    3. Turn the power switch on (IG), and wait for at least 60 seconds.
    4. Clear the DTCs. Refer to DTC CHECK / CLEAR [03/2012 - ] .
    5. Turn the power switch off.
    6. Turn the power switch on (IG), and wait for at least 60 seconds.
    7. Check for DTCs. Refer to DTC CHECK / CLEAR [03/2012 - ] .

      OK

      DTC B1805/52, B1806/52, B1807/52 or B1808/52 is not output.

      HINT: 

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

      TEXT IN ILLUSTRATION

      *1 Front Passenger Side Squib
      *2 Center Airbag Sensor Assembly

    NG → See step   7 

    OK → See step   8 

  5. CHECK INSTRUMENT PANEL WIRE 
    1. Disconnect the instrument panel wire connector from the No. 2 instrument panel wire.
      GTY409726Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    3. Turn the power switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      Ns1-1 (P+) - Body ground Power switch on (IG) Below 1 V
      Ns1-2 (P-) - Body ground Power switch on (IG) Below 1 V
    5. Turn the power switch off.
    6. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
    7. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Ns1-1 (P+) - Ns1-2 (P-) Always Below 1 Ω
    8. Release the activation prevention mechanism built into connector B. Refer to DIAGNOSIS SYSTEM [03/2012 - ] .
    9. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Ns1-1 (P+) - Ns1-2 (P-) Always 1 MΩ or higher
      Ns1-1 (P+) - Body ground Always 1 MΩ or higher
      Ns1-2 (P-) - Body ground Always 1 MΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front Passenger Side Squib
      *2 No. 2 Instrument Panel Wire
      *3 Instrument Panel Wire
      *4 Center Airbag Sensor Assembly
      *5 Connector C
      *a Front view of wire harness connector
      (to No. 2 Instrument Panel Wire)
    10. Restore the released activation prevention mechanism of connector B to its original condition.

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK → REPLACE NO. 2 INSTRUMENT PANEL WIRE 

  6. REPLACE INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY. Refer to  REMOVAL [03/2012 - ] 
  7. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [03/2012 - ] 
  8. USE SIMULATION METHOD TO CHECK. Refer to  DIAGNOSIS SYSTEM [03/2012 - ] 
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