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AIRBAG SYSTEM, Diagnostic DTC:B1660/43

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DTC Code DTC Name
B1660/43 Passenger Airbag ON/OFF Indicator Circuit Malfunction
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DESCRIPTION

The passenger airbag ON/OFF indicator circuit consists of the airbag ECU assembly and passenger airbag ON/OFF indicator (air conditioning control assembly).

The passenger airbag ON/OFF indicator indicates the operation condition of the instrument panel passenger airbag assembly and lower No. 2 instrument panel airbag assembly.

DTC B1660/43 is stored when a malfunction is detected in the passenger airbag ON/OFF indicator circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Test Mode / Check Mode
B1660/43 Passenger Airbag ON/OFF Indicator Circuit Malfunction

  • The airbag ECU assembly detects a line short, short to ground or B+, or an open in the passenger airbag ON/OFF indicator circuit.

  • Passenger airbag ON/OFF indicator malfunction

  • Airbag ECU assembly malfunction

  • Instrument panel wire

  • Instrument panel junction block assembly

  • Passenger airbag ON/OFF indicator (Air conditioning control assembly)

  • Airbag ECU assembly

 Does not apply to test/check mode
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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  • Inspect the fuses for circuits related to this system before performing the following procedure.

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PROCEDURE


  1. Click here

    CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION


    1. Turn the engine switch on (IG).

    2. Check the passenger airbag ON/OFF indicator operation.

      Tip:

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

      Click here

      Result
      Result Proceed to
      ON/OFF indicator illumination is always on. A
      ON/OFF indicator illumination is always off. B

  2. Click here

    CHECK CONNECTORS


    1. Turn the engine switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      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 ECU assembly, air conditioning control assembly and instrument panel junction block assembly.

      OK
      The connectors are properly connected.
      Tip:

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

    4. Disconnect the connectors from the airbag ECU assembly, air conditioning control assembly and instrument panel junction block assembly.

    5. Check that the terminals of the connectors are not deformed or damaged.

      OK
      The terminals are not deformed or damaged.
      Result
      Proceed to
      OK
      NG

  3. Click here

    CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION


    1. Connect the connector to the air conditioning control assembly and instrument panel junction block 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.
      Result
      Proceed to
      OK
      NG

  4. Click here

    CHECK DTC


    1. B00677QC01
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly

      Turn the engine switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      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 ECU assembly.

    4. Connect the cable to the negative (-) battery terminal.

    5. Clear the DTCs stored in memory.

      Click here


      1. Body Electrical > SRS Airbag > Clear DTCs


    6. Turn the engine switch off.

    7. Turn the engine switch on (IG), and wait for at least 60 seconds.

    8. Check for DTCs.

      Click here


      1. Body Electrical > SRS Airbag > Trouble Codes


      OK
      DTC B1660/43 is not output.
      Tip:

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

      Result
      Proceed to
      OK
      NG

  5. Click here

    CHECK WIRE HARNESS (OPEN)


    1. B0065CAC02
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *5 Service Wire
      *a

      Front view of wire harness connector

      (to Airbag ECU Assembly)
      *b

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

      Turn the engine switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      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 air conditioning control 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
      O64-13 (PAON) - O64-12 (P-AB) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

  6. Click here

    CHECK WIRE HARNESS (SHORT)


    1. B0067RTC04
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

      Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O64-13 (PAON) - O64-12 (P-AB) Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

  7. Click here

    CHECK WIRE HARNESS (SHORT TO B+)


    1. B0067RTC04
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

      Connect the cable to the negative (-) battery terminal.

    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
      O64-13 (PAON) - Body ground Engine switch on (IG) Below 1 V
      O64-12 (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.

      CAUTION:

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

      Result
      Proceed to
      OK
      NG

  8. Click here

    CHECK WIRE HARNESS (SHORT TO GROUND)


    1. B0067RTC04
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O64-13 (PAON) - Body ground Always 1 MΩ or higher
      O64-12 (P-AB) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

  9. Click here

    CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)


    1. B0065JKC01
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)

      Disconnect the connector from the instrument panel junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4A-46 (PAON) - Body ground Always 1 MΩ or higher
      4A-48 (PAON) - Body ground Always 1 MΩ or higher
      4A-26 (P-AB) - Body ground Always 1 MΩ or higher
      4A-38 (P-AB) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    • NG

      REPLACE INSTRUMENT PANEL WIRE

  10. Click here

    CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)


    1. B0065JKC01
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)

      Disconnect the connector from the instrument panel junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4A-46 (PAON) - Other terminals Always 1 MΩ or higher
      4A-48 (PAON) - Other terminals Always 1 MΩ or higher
      4A-26 (P-AB) - Other terminals Always 1 MΩ or higher
      4A-38 (P-AB) - Other terminals Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    • NG

      REPLACE INSTRUMENT PANEL WIRE

  11. Click here

    CHECK INSTRUMENT PANEL WIRE (SHORT)


    1. B0065JKC01
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)

      Disconnect the connector from the instrument panel junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4A-46 (PAON) - 4A-26 (P-AB) Always 1 MΩ or higher
      4A-48 (PAON) - 4A-38 (P-AB) Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    • NG

      REPLACE INSTRUMENT PANEL WIRE

  12. Click here

    CHECK INSTRUMENT PANEL WIRE (OPEN)


    1. B00653KC02
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *5 Service Wire
      *a

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)
      *b

      Front view of wire harness connector

      (to Airbag ECU Assembly)

      Disconnect the connector from the instrument panel junction block assembly.

      Tip:

      The service wire has already been inserted into connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4A-46 (PAON) - 4A-26 (P-AB) Always Below 1 Ω

    3. Disconnect the service wire from connector B.

    4. B0067L0C02
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *5 Service Wire
      *a

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)
      *b

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

      Using a service wire, connect terminals 13 (PAON) and 12 (P-AB) of connector E.

      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
      4A-48 (PAON) - 4A-38 (P-AB) Always Below 1 Ω

    6. Disconnect the service wire from connector E.

      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    • NG

      REPLACE INSTRUMENT PANEL WIRE

  13. Click here

    CHECK CONNECTORS


    1. Turn the engine switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      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 ECU assembly, air conditioning control assembly and instrument panel junction block assembly.

      OK
      The connectors are properly connected.
      Tip:

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

    4. Disconnect the connectors from the airbag ECU assembly, air conditioning control assembly and instrument panel junction block assembly.

    5. Check that the terminals of the connectors are not deformed or damaged.

      OK
      The terminals are not deformed or damaged.
      Result
      Proceed to
      OK
      NG

  14. Click here

    CHECK WIRE HARNESS (OPEN)


    1. B0065CAC02
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *5 Service Wire
      *a

      Front view of wire harness connector

      (to Airbag ECU Assembly)
      *b

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

      Connect the connector to the instrument panel junction block assembly.

    2. 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.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O64-13 (PAON) - O64-12 (P-AB) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

  15. Click here

    CHECK WIRE HARNESS (SHORT)


    1. B0067RTC04
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

      Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O64-13 (PAON) - O64-12 (P-AB) Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

  16. Click here

    CHECK WIRE HARNESS (SHORT TO B+)


    1. B0067RTC04
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

      Connect the cable to the negative (-) battery terminal.

    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
      O64-13 (PAON) - Body ground Engine switch on (IG) Below 1 V
      O64-12 (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.

      CAUTION:

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

      Result
      Proceed to
      OK
      NG

  17. Click here

    CHECK WIRE HARNESS (SHORT TO GROUND)


    1. B0067RTC04
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O64-13 (PAON) - Body ground Always 1 MΩ or higher
      O64-12 (P-AB) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

  18. Click here

    CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE)


    1. B0067RTC05
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

      Connect the cable to the negative (-) battery terminal.

    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
      O64-8 (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.

      CAUTION:

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

      Result
      Proceed to
      OK
      NG

  19. Click here

    CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. B0067DFC02
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Airbag ECU Assembly)

      Connect the connector to the air conditioning control 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 according to the conditions in the table below.

      OK
      Terminal Connection Condition Specified Condition
      O50-23 (PAON) - Body ground Engine switch on (IG) "ON" comes on
      O50-17 (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.

      CAUTION:

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

      Result
      Proceed to
      OK
      NG

  20. Click here

    CHECK DTC


    1. B00677QC01
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly

      Connect the connector to the airbag ECU assembly.

    2. Connect the cable to the negative (-) battery terminal.

    3. Clear the DTCs stored in memory.

      Click here


      1. Body Electrical > SRS Airbag > Clear DTCs


    4. Turn the engine switch off.

    5. Turn the engine switch on (IG), and wait for at least 60 seconds.

    6. Check for DTCs.

      Click here


      1. Body Electrical > SRS Airbag > Trouble Codes


      OK
      DTC B1660/43 is not output.
      Tip:

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

      Result
      Proceed to
      OK
      NG

  21. Click here

    CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)


    1. B0065JKC01
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)

      Disconnect the connector from the instrument panel junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4A-46 (PAON) - Body ground Always 1 MΩ or higher
      4A-48 (PAON) - Body ground Always 1 MΩ or higher
      4A-26 (P-AB) - Body ground Always 1 MΩ or higher
      4A-38 (P-AB) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    • NG

      REPLACE INSTRUMENT PANEL WIRE

  22. Click here

    CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)


    1. B0065JKC01
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)

      Disconnect the connector from the instrument panel junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4A-46 (PAON) - Other terminals Always 1 MΩ or higher
      4A-48 (PAON) - Other terminals Always 1 MΩ or higher
      4A-26 (P-AB) - Other terminals Always 1 MΩ or higher
      4A-38 (P-AB) - Other terminals Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    • NG

      REPLACE INSTRUMENT PANEL WIRE

  23. Click here

    CHECK INSTRUMENT PANEL WIRE (SHORT)


    1. B0065JKC01
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)

      Disconnect the connector from the instrument panel junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4A-46 (PAON) - 4A-26 (P-AB) Always 1 MΩ or higher
      4A-48 (PAON) - 4A-38 (P-AB) Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    • NG

      REPLACE INSTRUMENT PANEL WIRE

  24. Click here

    CHECK INSTRUMENT PANEL WIRE (OPEN)


    1. B00653KC02
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *5 Service Wire
      *a

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)
      *b

      Front view of wire harness connector

      (to Airbag ECU Assembly)

      Disconnect the connector from the instrument panel junction block assembly.

      Tip:

      The service wire has already been inserted into connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4A-46 (PAON) - 4A-26 (P-AB) Always Below 1 Ω

    3. Disconnect the service wire from connector B.

    4. B0067L0C02
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag ECU Assembly
      *3 Air Conditioning Control Assembly
      *4 Instrument Panel Wire
      *5 Service Wire
      *a

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)
      *b

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

      Using a service wire, connect terminals 13 (PAON) and 12 (P-AB) of connector E.

      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
      4A-48 (PAON) - 4A-38 (P-AB) Always Below 1 Ω

    6. Disconnect the service wire from connector E.

      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    • NG

      REPLACE INSTRUMENT PANEL WIRE