LEMON Manuals: Even more car manuals for everyone
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 B1810/53: Short in Driver Side Squib 2nd Step Circuit; DTC B1811/53: Open in Driver Side Squib 2nd Step Circuit; DTC B1812/53: Short to GND in Driver Side Squib 2nd Step Circuit; DTC B1813/53: Short to B+ in Driver Side Squib 2nd Step Circuit >> Procedure

DTC B1810/53: Short in Driver Side Squib 2nd Step Circuit; DTC B1811/53: Open in Driver Side Squib 2nd Step Circuit; DTC B1812/53: Short to GND in Driver Side Squib 2nd Step Circuit; DTC B1813/53: Short to B+ in Driver Side Squib 2nd Step Circuit: Procedure

  1. CHECK HORN BUTTON ASSEMBLY (DRIVER SIDE SQUIB 2ND STEP) 
    1. Turn the power switch off.
      GTY407302Courtesy 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 horn button assembly.
    4. Connect the white wire side of SST (resistance: 2.1 Ω) to connector E (black connector).
      WARNING:

      Never connect the tester to the horn button assembly (driver side squib 2nd step) 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 B1810/53, B1811/53, B1812/53 or B1813/53 is not output.

      HINT: 

      Codes other than DTC B1810/53, B1811/53, B1812/53 and B1813/53 may be output at this time, but they are not related to this check.

      TEXT IN ILLUSTRATION

      *1 Driver Side Squib 2nd Step
      *2 Spiral Cable Sub-assembly
      *3 Center Airbag Sensor Assembly
      *4 Connector E
      *5 SST
      *a Front view of wire harness connector
      (to Driver Side Squib 2nd Step)
      *b Color: Black

    NG → See step   2 

    OK → See step   7 

  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 horn button assembly side) are not damaged.

      OK

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

      GTY367785Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Driver Side Squib 2nd Step
      *2 Spiral Cable Sub-assembly
      *3 Center Airbag Sensor Assembly

    NG → REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  3. CHECK DRIVER SIDE SQUIB 2ND STEP CIRCUIT 
    1. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
      GTY396496Courtesy 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
      z2-2 (D2+) - Body ground Power switch on (IG) Below 1 V
      z2-1 (D2-) - 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
      z2-2 (D2+) - z2-1 (D2-) 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
      z2-2 (D2+) - z2-1 (D2-) Always 1 MΩ or higher
      z2-2 (D2+) - Body ground Always 1 MΩ or higher
      z2-1 (D2-) - Body ground Always 1 MΩ or higher
      TEXT IN ILLUSTRATION

      *1 Driver Side Squib 2nd Step
      *2 Spiral Cable Sub-assembly
      *3 Center Airbag Sensor Assembly
      *4 Front view of wire harness connector
      (to Driver Side Squib 2nd Step)
      *a Color: Black
    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 horn button assembly and center airbag sensor assembly.
      GTY364151Courtesy 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 B1810/53, B1811/53, B1812/53 or B1813/53 is not output.

      HINT: 

      Codes other than DTC B1810/53, B1811/53, B1812/53 and B1813/53 may be output at this time, but they are not related to this check.

      TEXT IN ILLUSTRATION

      *1 Driver Side Squib 2nd Step
      *2 Spiral Cable Sub-assembly
      *3 Center Airbag Sensor Assembly

    NG → See step   8 

    OK → See step   6 

  5. CHECK INSTRUMENT PANEL WIRE 
    1. Disconnect the instrument panel wire connector from the spiral cable sub-assembly.
      GTY395679Courtesy 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
      N30-4 (D2+) - Body ground Power switch on (IG) Below 1 V
      N30-3 (D2-) - 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
      N30-4 (D2+) - N30-3 (D2-) 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
      N30-4 (D2+) - N30-3 (D2-) Always 1 MΩ or higher
      N30-4 (D2+) - Body ground Always 1 MΩ or higher
      N30-3 (D2-) - Body ground Always 1 MΩ or higher
      TEXT IN ILLUSTRATION

      *1 Instrument Panel Wire
      *2 Spiral Cable Sub-assembly
      *3 Center Airbag Sensor Assembly
      *4 Connector C
      *a Rear view of wire harness connector
      (to Spiral Cable Sub-assembly)
    10. Restore the released activation prevention mechanism of connector B to its original condition.

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK → See step   9 

  6. USE SIMULATION METHOD TO CHECK. Refer to  DIAGNOSIS SYSTEM [03/2012 - ] 
  7. REPLACE HORN BUTTON ASSEMBLY. Refer to  REMOVAL [03/2012 - ] 
  8. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [03/2012 - ] 
  9. REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to  REMOVAL [03/2012 - ] 
scientia non olet · About LEMON Manuals