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Home >> Scion >> 2013 >> iQ Base >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System (Diagnostic Codes B1000/31 - B1692/81) (Except Electric) >> Airbag System >> DTC B1660/43: Passenger Airbag ON/OFF Indicator Circuit Malfunction >> Procedure

DTC B1660/43: Passenger Airbag ON/OFF Indicator Circuit Malfunction: Procedure

  1. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION 
    1. Turn the ignition switch to ON.
    2. Check the passenger airbag ON/OFF indicator operation.

      HINT: 

      Refer to the normal condition of the passenger airbag ON/OFF indicator. Refer to DIAGNOSIS SYSTEM .

      Fig 1: Identifying Passenger Airbag ON/OFF Indicator Timing Chart
      GTY158824Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      RESULT

      ON/OFF Indicator Illumination Proceed to
      Always ON A
      OFF B

    B → See step   7 

    A: Go to next step 

  2. CHECK CONNECTION OF CONNECTORS 
    1. Turn the ignition switch off.
    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the center airbag sensor assembly and the telltale light assembly.

      OK

      The connectors are properly connected.

    NG → CONNECT CONNECTORS PROPERLY 

    OK: Go to next step 

  3. CHECK CONNECTORS 
    1. Disconnect the connectors from the center airbag sensor assembly and the telltale light assembly.
    2. Check that the connectors (on the center airbag sensor assembly side and telltale light assembly side) are not damaged.

      OK

      The connectors are not deformed or damaged.

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK: Go to next step 

  4. CHECK PASSENGER AIRBAG ON/OFF INDICATOR 
    Fig 2: Identifying Passenger Airbag On/Off Indicator
    GTY345381Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the connector to the telltale light assembly.
    2. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    3. Turn the ignition switch to ON.
    4. Check the passenger airbag ON/OFF indicator operation.

      OK

      The passenger airbag ON/OFF indicator does not come on.

    NG → See step   6 

    OK: Go to next step 

  5. CHECK DTC 
    Fig 3: Checking Center Airbag Sensor
    GTY346088Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the connector to 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 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 for DTCs. Refer to DTC CHECK / CLEAR .

      OK

      DTC B1660/43 is not output.

      TEXT IN ILLUSTRATION

      *1 Telltale Light Assembly
      *2 Center Airbag Sensor Assembly

      HINT: 

      DTCs other than B1660/43 may be output at this time, but they are not related to this check.

    NG → See step   13 

    OK → See step   16 

  6. CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR ASSEMBLY - TELLTALE LIGHT ASSEMBLY) 
    Fig 4: Checking Instrument Panel Wire (Center Airbag Sensor Assembly - Telltale Light Assembly)
    GTY345843Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TEXT IN ILLUSTRATION

    *1 Telltale Light Assembly *2 Center Airbag Sensor Assembly
    *3 Instrument Panel Wire *4 Connector C
    *5 Connector B *6 Service Wire
    *a Front view of wire harness connector
    (to Telltale Light Assembly)    		 *b Rear view of wire harness connector
    (to Center Airbag Sensor Assembly)
    1. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    2. Disconnect the connectors from the telltale light assembly and center airbag sensor assembly.
    3. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    4. Turn the ignition switch to ON.
    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      D65-2 (PAON) - Body ground Ignition switch ON Below 1 V
      D65-1 (P-AB) - Body ground Ignition switch ON Below 1 V
    6. Turn the ignition switch off.
    7. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    8. Using a service wire, connect terminals 23 and 17 of connector B.
      NOTE:

      Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.

    9. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D65-2 (PAON) - D65-1 (P-AB) Always Below 1 Ω
    10. Disconnect the service wire from connector B.
    11. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D65-2 (PAON) - D65-1 (P-AB) Always 1 MΩ or higher
      D65-2 (PAON) - Body ground Always 1 MΩ or higher
      D65-1 (P-AB) - Body ground Always 1 MΩ or higher

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK → See step   14 

  7. CHECK CONNECTION OF CONNECTORS 
    1. Turn the ignition switch off.
    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the center airbag sensor assembly and the telltale light assembly.

      OK

      The connectors are properly connected.

    NG → CONNECT CONNECTORS PROPERLY 

    OK: Go to next step 

  8. CHECK CONNECTORS 
    1. Disconnect the connectors from the center airbag sensor assembly and the telltale light assembly.
    2. Check that the connectors (on the center airbag sensor assembly side and telltale light assembly side) are not damaged.

      OK

      The connectors are not deformed or damaged.

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK: Go to next step 

  9. CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR ASSEMBLY - TELLTALE LIGHT ASSEMBLY) 
    Fig 5: Checking Instrument Panel Wire (Center Airbag Sensor Assembly - Telltale Light Assembly)
    GTY345843Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TEXT IN ILLUSTRATION

    *1 Telltale Light Assembly *2 Center Airbag Sensor Assembly
    *3 Instrument Panel Wire *4 Connector C
    *5 Connector B *6 Service Wire
    *a Front view of wire harness connector
    (to Telltale Light Assembly)    		 *b Rear view of wire harness connector
    (to Center Airbag Sensor Assembly)
    1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    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
      D65-2 (PAON) - Body ground Ignition switch ON Below 1 V
      D65-1 (P-AB) - Body ground Ignition switch ON Below 1 V
    4. Turn the ignition switch off.
    5. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    6. Using a service wire, connect terminals 23 and 17 of connector B.
      NOTE:

      Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.

    7. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D65-2 (PAON) - D65-1 (P-AB) Always Below 1 Ω
    8. Disconnect the service wire from connector B.
    9. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D65-2 (PAON) - D65-1 (P-AB) Always 1 MΩ or higher
      D65-2 (PAON) - Body ground Always 1 MΩ or higher
      D65-1 (P-AB) - Body ground Always 1 MΩ or higher

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK: Go to next step 

  10. CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE) 
    Fig 6: Checking Passenger Airbag On/Off Indicator (Source Voltage)
    GTY345339Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the connectors to 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 to ON.
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      D65-6 (IG+) - Body ground Ignition switch ON 11 to 14 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Telltale Light Assembly)

    NG → REPLACE HARNESS AND CONNECTOR (TELLTALE LIGHT ASSEMBLY - BATTERY) 

    OK: Go to next step 

  11. CHECK PASSENGER AIRBAG ON/OFF INDICATOR 
    Fig 7: Checking Passenger Airbag On/Off Indicator
    GTY345093Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Turn the ignition switch off.
    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    3. Connect the connector to the telltale light assembly.
    4. Disconnect the connectors from the center airbag sensor assembly.
    5. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    6. Turn the ignition switch to ON.
    7. Check the indicator according to the value(s) in the table below.

      OK

      Tester Connection Switch Condition Passenger airbag ON/OFF indicator
      D43-23 (PAON) - Body ground Ignition switch ON "ON" comes on
      D43-17 (P-AB) - Body ground Ignition switch ON "OFF" comes on
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Center Airbag Sensor Assembly)

    NG → See step   17 

    OK: Go to next step 

  12. CHECK DTC 
    Fig 8: Checking Center Airbag Sensor - Telltale Light Assembly Circuit
    GTY346088Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Turn the ignition switch off.
    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    3. Connect the connectors to the center airbag sensor assembly.
    4. Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Clear the DTCs stored in the memory. Refer to DTC CHECK / CLEAR .
    7. Turn the ignition switch off.
    8. Turn the ignition switch to ON, and wait for at least 60 seconds.
    9. Check for DTCs. Refer to DTC CHECK / CLEAR .

      OK

      DTC B1660/43 is not output.

      TEXT IN ILLUSTRATION

      *1 Telltale Light Assembly
      *2 Center Airbag Sensor Assembly

      HINT: 

      DTCs other than B1660/43 may be output at this time, but they are not related to this check.

    NG → See step   18 

    OK → See step   15 

  13. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL 
  14. REPLACE TELLTALE LIGHT ASSEMBLY. Refer to  REMOVAL 
  15. USE SIMULATION METHOD TO CHECK. Refer to  DIAGNOSIS SYSTEM 
  16. USE SIMULATION METHOD TO CHECK. Refer to  DIAGNOSIS SYSTEM 
  17. REPLACE TELLTALE LIGHT ASSEMBLY. Refer to  REMOVAL 
  18. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL 
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