AIRBAG SYSTEM, Diagnostic DTC:B1660/43

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

DESCRIPTION

The passenger airbag ON/OFF indicator circuit consists of the airbag sensor assembly and combination switch assembly (passenger airbag ON/OFF indicator).

The passenger airbag ON/OFF indicator indicates the operation condition of the front passenger airbag and front passenger side knee airbag.

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

DTC No. DTC Detection Condition Trouble Area
B1660/43

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

  • Combination switch assembly malfunction

  • Airbag sensor assembly malfunction

  • Instrument panel wire

  • Combination switch assembly (Passenger airbag ON/OFF indicator)

  • Airbag sensor assembly

WIRING DIAGRAM

B001L4VE07
*1 from Auxiliary Battery
*2 Combination Switch Assembly (Passenger Airbag ON/OFF Indicator)
*3 Airbag Sensor Assembly

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION


    1. Turn the power switch on (IG).

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

      Tech Tips

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

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

    B

    CHECK CONNECTORS Click here

    A

  2. CHECK CONNECTORS


    1. Turn the power switch off.

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

      CAUTION:

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

    3. Check that the connectors are properly connected to the airbag sensor assembly and combination switch assembly.

      OK
      The connectors are properly connected.

      Tech Tips

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

    4. Disconnect the connectors from the airbag sensor assembly and combination switch 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

  3. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. B001MII

      Connect the connector to the combination switch assembly.

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

    3. Turn the power switch on (IG).

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

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

    NG

    CHECK INSTRUMENT PANEL WIRE (OPEN) Click here

    OK

  4. CHECK AIRBAG SENSOR ASSEMBLY


    1. B001NA7E01
      Text in Illustration
      *1 Combination Switch Assembly
      *2 Airbag Sensor Assembly

      Turn the power switch off.

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

      CAUTION:

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

    3. Connect the connector to the airbag sensor assembly.

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

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

    6. Clear the DTCs stored in memory Click here.

    7. Turn the power switch off.

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

    9. Check for DTCs Click here.

      OK
      DTC B1660/43 is not output.

      Tech Tips

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


    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

  5. CHECK INSTRUMENT PANEL WIRE (OPEN)


    1. Turn the power switch off.

      B001LCNE02

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

      CAUTION:

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

    3. Disconnect the connector from the combination switch assembly.

    4. Using SST, connect terminals 23 (PAON) and 17 (P-AB) of connector B.

      Note

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

      SST
      09843-18040

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H72-19 (PAON) - H72-20 (P-AB) Always Below 1 Ω
      Text in Illustration
      *1 Combination Switch Assembly *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire *4 Connector B
      *5 Connector C - -
      *a

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

      		 *b

      Front view of wire harness connector

      (to Combination Switch Assembly)

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  6. CHECK INSTRUMENT PANEL WIRE (SHORT)


    1. B001N8QE02
      Text in Illustration
      *1 Combination Switch Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Combination Switch Assembly)

      Disconnect SST from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H72-19 (PAON) - H72-20 (P-AB) Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  7. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)


    1. B001N8QE02
      Text in Illustration
      *1 Combination Switch Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Combination Switch Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H72-19 (PAON) - Body ground Always 1 MΩ or higher
      H72-20 (P-AB) - Body ground Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  8. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)


    1. B001N8QE02
      Text in Illustration
      *1 Combination Switch Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Combination Switch Assembly)

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

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H72-19 (PAON) - Body ground Power switch on (IG) Below 1 V
      H72-20 (P-AB) - Body ground Power switch on (IG) Below 1 V

    OK

    REPLACE COMBINATION SWITCH ASSEMBLY Click here

    NG

    REPLACE INSTRUMENT PANEL WIRE

  9. CHECK CONNECTORS


    1. Turn the power switch off.

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

      CAUTION:

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

    3. Check that the connectors are properly connected to the airbag sensor assembly and combination switch assembly.

      OK
      The connectors are properly connected.

      Tech Tips

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

    4. Disconnect the connectors from the airbag sensor assembly and combination switch 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

  10. CHECK INSTRUMENT PANEL WIRE (OPEN)


    1. Using SST, connect terminals 23 (PAON) and 17 (P-AB) of connector B.

      B001LCNE02

      Note

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

      SST
      09843-18040

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H72-19 (PAON) - H72-20 (P-AB) Always Below 1 Ω
      Text in Illustration
      *1 Combination Switch Assembly *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire *4 Connector B
      *5 Connector C - -
      *a

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

      		 *b

      Front view of wire harness connector

      (to Combination Switch Assembly)

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  11. CHECK INSTRUMENT PANEL WIRE (SHORT)


    1. B001N8QE02
      Text in Illustration
      *1 Combination Switch Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Combination Switch Assembly)

      Disconnect SST from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H72-19 (PAON) - H72-20 (P-AB) Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  12. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)


    1. B001N8QE02
      Text in Illustration
      *1 Combination Switch Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Combination Switch Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H72-19 (PAON) - Body ground Always 1 MΩ or higher
      H72-20 (P-AB) - Body ground Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  13. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)


    1. B001N8QE02
      Text in Illustration
      *1 Combination Switch Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Combination Switch Assembly)

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

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H72-19 (PAON) - Body ground Power switch on (IG) Below 1 V
      H72-20 (P-AB) - Body ground Power switch on (IG) Below 1 V

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  14. CHECK COMBINATION SWITCH ASSEMBLY (SOURCE VOLTAGE)


    1. B001M1OE02
      Text in Illustration
      *1 Combination Switch Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Combination Switch Assembly)

      Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H72-8 (B) - Body ground Power switch on (IG) 11 to 14 V

    NG

    REPLACE WIRE HARNESS OR AUXILIARY BATTERY

    OK

  15. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. B001LC6E02
      Text in Illustration
      *1 Combination Switch Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

      Turn the power switch off.

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

      CAUTION:

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

    3. Connect the connector to the combination switch assembly.

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

    5. Turn the power switch on (IG).

    6. Check the indicator according to the conditions in the table below.

      OK
      Terminal Connection Condition Specified Condition
      H84-23 (PAON) - Body ground Power switch on (IG) "ON" comes on
      H84-17 (P-AB) - Body ground Power switch on (IG) "OFF" comes on

    NG

    REPLACE COMBINATION SWITCH ASSEMBLY Click here

    OK

  16. CHECK AIRBAG SENSOR ASSEMBLY


    1. B001NA7E01
      Text in Illustration
      *1 Combination Switch Assembly
      *2 Airbag Sensor Assembly

      Turn the power switch off.

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

      CAUTION:

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

    3. Connect the connector to the airbag sensor assembly.

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

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

    6. Clear the DTCs stored in memory Click here.

    7. Turn the power switch off.

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

    9. Check for DTCs Click here.

      OK
      DTC B1660/43 is not output.

      Tech Tips

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


    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE AIRBAG SENSOR ASSEMBLY Click here