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Home >> Scion >> 2013 >> iQ Base >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System (Diagnostic Codes B1693/81 - B1908/74 & Symptom Tests) (Except Electric) >> 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 CONNECTOR 
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connector is properly connected to the steering pad.

      OK

      The connector is properly connected.

      HINT: 

      If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

    4. Disconnect the connector from the steering pad.
    5. Check that the spiral cable connector (on the steering pad side) is not damaged.

      OK

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

    NG → See step   9 

    OK: Go to next step 

  2. CHECK DTC 
    • SST: 09843-18061 
    1. Disconnect the connector from the steering pad.
      Fig 1: Checking Steering Pad (Driver Side Squib 2nd Step)
      GTY347100Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect SST (resistance 2.1 Ω) to connector E (black connector).
      WARNING:

      Never connect a tester to the steering pad (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.
      • Insert SST straight into the terminals of the connector.
    3. Connect the cable to the negative battery terminal, and wait for at least 2 seconds.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory. Refer to CHECK MODE PROCEDURE .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Turn the steering wheel lock to lock 5 times or more.
    9. Check the DTCs. Refer to CHECK MODE PROCEDURE .

      OK

      DTC B1810, B1811, B1812, B1813 or 53 is not output.

      TEXT IN ILLUSTRATION

      *1 Driver Side Squib 2nd Step
      *2 Spiral Cable
      *3 Center Airbag Sensor Assembly
      *4 Connector E
      *a Front view of wire harness connector
      (to Driver Side Squib 2nd Step)
      *b Color: Black
      *c Front view of DLC3
      *d DTC 53

      HINT: 

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

    NG → See step   3 

    OK → See step   8 

  3. CHECK CONNECTOR 
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect the SST from connector E.
    4. Check that the connectors that link the spiral cable and instrument panel wire harness are properly connected.

      OK

      The connectors are properly connected.

      HINT: 

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    5. Disconnect the connectors that link the spiral cable and instrument panel wire.
    6. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    7. Check that the short spring for the spiral cable connector with the activation prevention mechanism is not deformed or damaged.

      OK

      The short spring is not deformed or damaged.

    NG → REPLACE SPIRAL CABLE OR INSTRUMENT PANEL WIRE 

    OK: Go to next step 

  4. CHECK SPIRAL CABLE (DRIVER SIDE SQUIB 2ND STEP - INSTRUMENT PANEL WIRE) 
    1. Connect the cable to the negative battery terminal, and wait for at least 2 seconds.
      Fig 2: Checking Spiral Cable (Driver Side Squib 2nd Step - Instrument Panel Wire)
      GTY346526Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      z2-1 (D2-) - Body ground Ignition switch ON Below 1 V
      z2-2 (D2+) - Body ground Ignition switch ON Below 1 V
      TEXT IN ILLUSTRATION

      *1 Driver Side Squib 2nd Step
      *2 Spiral Cable
      *3 Instrument Panel Wire
      *4 Center Airbag Sensor Assembly
      *5 Connector E
      *a Front view of wire harness connector
      (to Driver Side Squib 2nd Step)
      *b Color: Black
    4. Turn the ignition switch off.
    5. Disconnect the cable from the negative (-) 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
      z2-1 (D2-) - z2-2 (D2+) Always Below 1 Ω
    7. Release the activation prevention mechanism built into connector D. Refer to DIAGNOSIS SYSTEM .
    8. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      z2-1 (D2-) - z2-2 (D2+) Always 1 MΩ or higher
      z2-1 (D2-) - Body ground Always 1 MΩ or higher
      z2-2 (D2+) - Body ground Always 1 MΩ or higher
    9. Restore the released activation prevention mechanism of connector D to the original condition.

    NG → See step   9 

    OK: Go to next step 

  5. CHECK CONNECTOR 
    1. Check that the connector is properly connected to the center airbag sensor assembly.

      OK

      The connector is properly connected.

      HINT: 

      If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

    2. Disconnect the connector from the center airbag sensor assembly.
    3. Check that the terminal of the connector is not damaged.

      OK

      The terminal is not deformed or damaged.

    4. Check that the short spring for the instrument panel wire connector with the activation prevention mechanism is not deformed or damaged.

      OK

      The short spring is not deformed or damaged.

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK: Go to next step 

  6. CHECK INSTRUMENT PANEL WIRE (SPIRAL CABLE - CENTER AIRBAG SENSOR ASSEMBLY) 
    1. Connect the cable to the negative battery terminal, and wait for at least 2 seconds.
      Fig 3: Checking Instrument Panel Wire (Spiral Cable - Center Airbag Sensor Assembly)
      GTY346244Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      D44-3 (D2-) -
      Body ground      		 Ignition switch ON Below 1 V
      D44-4 (D2+) -
      Body ground      		 Ignition switch ON Below 1 V
      TEXT IN ILLUSTRATION

      *1 Driver Side Squib 2nd Step
      *2 Spiral Cable
      *3 Instrument Panel Wire
      *4 Center Airbag Sensor Assembly
      *5 Connector C
      *a Rear view of wire harness connector
      (to Spiral Cable)
    4. Turn the ignition switch off.
    5. Disconnect the cable from the negative (-) 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
      D44-3 (D2-) - D44-4 (D2+) Always Below 1 Ω
    7. Release the activation prevention mechanism built into connector B. Refer to DIAGNOSIS SYSTEM .
    8. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D44-3 (D2-) - D44-4 (D2+) Always 1 MΩ or higher
      D44-3 (D2-) -
      Body ground      		 Always 1 MΩ or higher
      D44-4 (D2+) -
      Body ground      		 Always 1 MΩ or higher
    9. Restore the released activation prevention mechanism of connector B to the original condition.

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK: Go to next step 

  7. CHECK DTC 
    1. Connect the connectors to the steering pad, spiral cable and the center airbag sensor assembly.
    2. Connect the cable to the negative battery terminal, and wait for at least 2 seconds.
    3. Turn the ignition switch to ON, and wait for at least 60 seconds.
    4. Clear the DTCs stored in the memory. Refer to DTC CHECK / CLEAR .
    5. Turn the ignition switch off.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Check the DTCs. Refer to DTC CHECK / CLEAR .

      OK

      DTC B1810, B1811, B1812, B1813 or 53 is not output.

      HINT: 

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

    NG → See step   10 

    OK → See step   11 

  8. REPLACE STEERING PAD. Refer to  REMOVAL 
  9. REPLACE SPIRAL CABLE. Refer to  REMOVAL 
  10. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL 
  11. USE SIMULATION METHOD TO CHECK. Refer to  DIAGNOSIS SYSTEM 
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