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Home >> Lexus >> 2013 >> ES 350 >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System (Diagnostic Codes (B1650/32 - B1928/78) & Symptom Tests)) >> 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 engine switch on (IG).
    2. Check the passenger airbag ON/OFF indicator operation.

      Result

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

      HINT: 

      Refer to the normal condition of the passenger airbag ON/OFF indicator. Refer to DIAGNOSIS SYSTEM [06/2012 - ] .

    B → See step   9 

    A: Go to next step 

  2. CHECK CONNECTORS 
    1. Turn the engine switch off.
    2. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    3. Check that the connectors are properly connected to the airbag sensor assembly and telltale light assembly.

      OK

      The connectors are properly connected.

      HINT: 

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

    4. Disconnect the connectors from the airbag sensor assembly and telltale light assembly.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK: Go to next step 

  3. CHECK PASSENGER AIRBAG ON/OFF INDICATOR 
    1. Connect the connector to the telltale light assembly.
    2. Connect the cable to the negative (-) battery terminal.
    3. Turn the engine switch on (IG).
    4. Check the passenger airbag ON/OFF indicator operation.

      OK

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

    NG → See step   5 

    OK: Go to next step 

  4. CHECK DTC 
    1. Turn the engine switch off.
      GTY381346Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    3. Connect the connector to the airbag sensor assembly.
    4. Connect the cable to the negative (-) battery terminal.
    5. Clear the DTCs stored in memory. Refer to DTC CHECK / CLEAR [06/2012 - ] .
    6. Turn the engine switch off.
    7. Turn the engine switch on (IG), and wait for at least 60 seconds.
    8. Check for DTCs. Refer to DTC CHECK / CLEAR [06/2012 - ] .

      OK

      DTC B1660/43 is not output.

      HINT: 

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

      TEXT IN ILLUSTRATION

      *1 Telltale Light Assembly
      *2 Airbag Sensor Assembly

    NG → See step   17 

    OK → See step   19 

  5. CHECK INSTRUMENT PANEL WIRE (OPEN) 
    1. Turn the engine switch off.
      GTY404866Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    3. Disconnect the connector from the telltale light assembly.
    4. Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) of connector B.
      NOTE:

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

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      H68-2 (PAON) - H68-1 (P-AB) Always Below 1 Ω
    6. Disconnect the service wire from connector B.
      TEXT IN ILLUSTRATION

      *1 Telltale Light Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Service Wire
      *a Front view of wire harness connector
      (to Airbag Sensor Assembly)
      *b Front view of wire harness connector
      (to Telltale Light Assembly)

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK: Go to next step 

  6. CHECK INSTRUMENT PANEL WIRE (SHORT) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY409962Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      H68-2 (PAON) - H68-1 (P-AB) Always 1 MΩ or higher
      TEXT IN ILLUSTRATION

      *1 Telltale Light Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Telltale Light Assembly)

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK: Go to next step 

  7. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+) 
    1. Connect the cable to the negative (-) battery terminal.
      GTY409962Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      H68-2 (PAON) - Body ground Engine switch on (IG) Below 1 V
      H68-1 (P-AB) - Body ground Engine switch on (IG) Below 1 V
    4. Turn the engine switch off.
    5. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      TEXT IN ILLUSTRATION

      *1 Telltale Light Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Telltale Light Assembly)

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK: Go to next step 

  8. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY409962Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      H68-2 (PAON) - Body ground Always 1 MΩ or higher
      H68-1 (P-AB) - Body ground Always 1 MΩ or higher
      TEXT IN ILLUSTRATION

      *1 Telltale Light Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Telltale Light Assembly)

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK → See step   18 

  9. CHECK CONNECTORS 
    1. Turn the engine switch off.
    2. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    3. Check that the connectors are properly connected to the airbag sensor assembly and telltale light assembly.

      OK

      The connectors are properly connected.

      HINT: 

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

    4. Disconnect the connectors from the airbag sensor assembly and telltale light assembly.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK: Go to next step 

  10. CHECK INSTRUMENT PANEL WIRE (OPEN) 
    1. Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) of connector B.
      GTY404866Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

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

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      H68-2 (PAON) - H68-1 (P-AB) Always Below 1 Ω
    3. Disconnect the service wire from connector B.
      TEXT IN ILLUSTRATION

      *1 Telltale Light Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Service Wire
      *a Front view of wire harness connector
      (to Airbag Sensor Assembly)
      *b Front view of wire harness connector
      (to Telltale Light Assembly)

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK: Go to next step 

  11. CHECK INSTRUMENT PANEL WIRE (SHORT) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY409962Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      H68-2 (PAON) - H68-1 (P-AB) Always 1 MΩ or higher
      TEXT IN ILLUSTRATION

      *1 Telltale Light Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Telltale Light Assembly)

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK: Go to next step 

  12. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+) 
    1. Connect the cable to the negative (-) battery terminal.
      GTY409962Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      H68-2 (PAON) - Body ground Engine switch on (IG) Below 1 V
      H68-1 (P-AB) - Body ground Engine switch on (IG) Below 1 V
    4. Turn the engine switch off.
    5. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      TEXT IN ILLUSTRATION

      *1 Telltale Light Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Telltale Light Assembly)

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK: Go to next step 

  13. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY409962Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      H68-2 (PAON) - Body ground Always 1 MΩ or higher
      H68-1 (P-AB) - Body ground Always 1 MΩ or higher
      TEXT IN ILLUSTRATION

      *1 Telltale Light Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Telltale Light Assembly)

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK: Go to next step 

  14. CHECK TELLTALE LIGHT ASSEMBLY (SOURCE VOLTAGE) 
    1. Connect the cable to the negative (-) battery terminal.
      GTY409958Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      H68-8 (IG+) - Body ground Engine switch on (IG) 11 to 14 V
    4. Turn the engine switch off.
    5. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      TEXT IN ILLUSTRATION

      *1 Telltale Light Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Telltale Light Assembly)

    NG → REPLACE WIRE HARNESS OR BATTERY 

    OK: Go to next step 

  15. CHECK PASSENGER AIRBAG ON/OFF INDICATOR 
    1. Connect the connector to the telltale light assembly.
      GTY400686Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the cable to the negative (-) battery terminal.
    3. Turn the engine switch on (IG).
    4. Check the indicator according to the conditions in the table below.

      OK

      Terminal Connection Condition Specified Condition
      H36-23 (PAON) - Body ground Engine switch on (IG) "ON" comes on
      H36-17 (P-AB) - Body ground Engine switch on (IG) "OFF" comes on
    5. Turn the engine switch off.
    6. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      TEXT IN ILLUSTRATION

      *1 Telltale Light Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Airbag Sensor Assembly)

    NG → See step   18 

    OK: Go to next step 

  16. CHECK DTC 
    1. Connect the connector to the airbag sensor assembly.
      GTY381346Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the cable to the negative (-) battery terminal.
    3. Clear the DTCs stored in memory. Refer to DTC CHECK / CLEAR [06/2012 - ] .
    4. Turn the engine switch off.
    5. Turn the engine switch on (IG), and wait for at least 60 seconds.
    6. Check for DTCs. Refer to DTC CHECK / CLEAR [06/2012 - ] .

      OK

      DTC B1660/43 is not output.

      HINT: 

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

      TEXT IN ILLUSTRATION

      *1 Telltale Light Assembly
      *2 Airbag Sensor Assembly

    NG → See step   17 

    OK → See step   19 

  17. REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [06/2012 - ] 
  18. REPLACE TELLTALE LIGHT ASSEMBLY. Refer to  REMOVAL [06/2012 - ] 
  19. USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2012 - ] 
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