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 center airbag sensor assembly and passenger seat belt warning light assembly (passenger airbag ON/OFF indicator).

The passenger airbag ON/OFF indicator indicates the operation condition of the front passenger 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 center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the passenger airbag ON/OFF indicator circuit.

  • Passenger seat belt warning light assembly malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • No. 2 Instrument panel wire

  • No. 5 Instrument panel wire

  • Passenger seat belt warning light assembly (Passenger airbag ON/OFF indicator)

  • Center airbag sensor assembly

WIRING DIAGRAM

A01JBWAE03

INSPECTION PROCEDURE

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.

      A01J8ZRE70
      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 (-) 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 center airbag sensor assembly and passenger seat belt warning light assembly. Also check that the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 5 instrument panel wire are properly connected.

      OK
      The connectors are properly connected.

      Tech Tips

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

    4. Disconnect the connectors from the center airbag sensor assembly and passenger seat belt warning light assembly. Also disconnect the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 5 instrument panel wire.

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

      OK
      The terminals are not deformed or damaged.

    NG

    REPLACE WIRE HARNESS

    OK

  3. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. Connect the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 5 instrument panel wire.

    2. Connect the connector to the passenger seat belt warning light assembly.

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

    4. Turn the power switch on (IG).

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

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

    NG

    CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (OPEN) Click here

    OK

  4. CHECK CENTER AIRBAG SENSOR ASSEMBLY


    1. A01J9RCE01
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly
      *2 Center Airbag Sensor Assembly

      Connect the connector to the center airbag sensor assembly.

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

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

    4. Clear the DTCs stored in the memory Click here.

    5. Turn the power switch off.

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

    7. 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.


    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  5. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (OPEN)


    1. Turn the power switch off.

      A01JATXE01

    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 connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 5 instrument panel wire.

    4. Disconnect the connector from the passenger seat belt warning light assembly.

    5. 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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M2-1 (PAON) - M2-5 (P-AB) Always Below 1 Ω
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)

      		 *4

      Front view of wire harness connector

      (to Passenger Seat Belt Warning Light Assembly)
      *5 Connector B *6 Connector G

    NG

    CHECK INSTRUMENT PANEL WIRE (OPEN) Click here

    OK

  6. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT)


    1. A01J8GEE01
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly
      *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Passenger Seat Belt Warning Light Assembly)
      *4 Connector G

      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
      M2-1 (PAON) - M2-5 (P-AB) Always 1 MΩ or higher

    NG

    CHECK INSTRUMENT PANEL WIRE (SHORT) Click here

    OK

  7. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT TO GROUND)


    1. A01J8GEE01
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly
      *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Passenger Seat Belt Warning Light Assembly)
      *4 Connector G

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M2-1 (PAON) - Body ground Always 1 MΩ or higher
      M2-5 (P-AB) - Body ground Always 1 MΩ or higher

    NG

    CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND) Click here

    OK

  8. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT TO B+)


    1. A01J8GEE01
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly
      *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Passenger Seat Belt Warning Light Assembly)
      *4 Connector G

      Connect the cable to the negative (-) 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 Switch Condition Specified Condition
      M2-1 (PAON) - Body ground Power switch on (IG) Below 1 V
      M2-5 (P-AB) - Body ground Power switch on (IG) Below 1 V

    NG

    CHECK INSTRUMENT PANEL WIRE (SHORT TO B+) Click here

    OK

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

  9. CHECK CONNECTORS


    1. Turn the power 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 center airbag sensor assembly and passenger seat belt warning light assembly. Also check that the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 5 instrument panel wire are properly connected.

      OK
      The connectors are properly connected.

      Tech Tips

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

    4. Disconnect the connectors from the center airbag sensor assembly and passenger seat belt warning light assembly. Also disconnect the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 5 instrument panel wire.

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

      OK
      The terminals are not deformed or damaged.

    NG

    REPLACE WIRE HARNESS

    OK

  10. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (OPEN)


    1. Connect the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 5 instrument panel wire.

      A01JATXE01

    2. 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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M2-1 (PAON) - M2-5 (P-AB) Always Below 1 Ω
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)

      		 *4

      Front view of wire harness connector

      (to Passenger Seat Belt Warning Light Assembly)
      *5 Connector B *6 Connector G

    NG

    CHECK INSTRUMENT PANEL WIRE (OPEN) Click here

    OK

  11. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT)


    1. A01J8GEE01
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly
      *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Passenger Seat Belt Warning Light Assembly)
      *4 Connector G

      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
      M2-1 (PAON) - M2-5 (P-AB) Always 1 MΩ or higher

    NG

    CHECK INSTRUMENT PANEL WIRE (SHORT) Click here

    OK

  12. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT TO GROUND)


    1. A01J8GEE01
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly
      *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Passenger Seat Belt Warning Light Assembly)
      *4 Connector G

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M2-1 (PAON) - Body ground Always 1 MΩ or higher
      M2-5 (P-AB) - Body ground Always 1 MΩ or higher

    NG

    CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND) Click here

    OK

  13. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT TO B+)


    1. A01J8GEE01
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly
      *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Passenger Seat Belt Warning Light Assembly)
      *4 Connector G

      Connect the cable to the negative (-) 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 Switch Condition Specified Condition
      M2-1 (PAON) - Body ground Power switch on (IG) Below 1 V
      M2-5 (P-AB) - Body ground Power switch on (IG) Below 1 V

    NG

    CHECK INSTRUMENT PANEL WIRE (SHORT TO B+) Click here

    OK

  14. CHECK PASSENGER SEAT BELT WARNING LIGHT ASSEMBLY (SOURCE VOLTAGE)


    1. A01JCA6E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Passenger Seat Belt Warning Light Assembly)

      Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      M2-6 (IG+) - Body ground Power switch on (IG) 10 to 14 V

    NG

    REPLACE WIRE HARNESS OR BATTERY

    OK

  15. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. A01J9KAE06
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)

      Turn the power 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 passenger seat belt warning light assembly.

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

    5. Turn the power switch on (IG).

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

      Result
      Tester Connection Switch Condition Specified Condition
      L16-23 (PAON) - Body ground Power switch on (IG) "ON" comes on
      L16-17 (P-AB) - Body ground Power switch on (IG) "OFF" comes on

    NG

    REPLACE PASSENGER SEAT BELT WARNING LIGHT ASSEMBLY Click here

    OK

  16. CHECK CENTER AIRBAG SENSOR ASSEMBLY


    1. A01J9RCE01
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly
      *2 Center Airbag Sensor Assembly

      Turn the power 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 center airbag sensor assembly.

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

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

    6. Clear the DTCs stored in the 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.


    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  17. CHECK INSTRUMENT PANEL WIRE (OPEN)


    1. Disconnect the instrument panel wire from the No. 2 instrument panel wire.

      A01JCMYE01

      Tech Tips

      SST 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
      LI2-2 (PAON) - LI2-14 (P-AB) Always Below 1 Ω
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire *4

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)
      *5

      Front view of wire harness connector

      (to No. 2 Instrument Panel Wire)

      		 *6 Connector B
      *7 Connector C - -

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  18. CHECK NO. 2 INSTRUMENT PANEL WIRE (OPEN)


    1. Disconnect the No. 2 instrument panel wire from the No. 5 instrument panel wire.

      A01J9D3E01

    2. Using SST, connect terminals 2 (PAON) and 14 (P-AB) of connector D.

      Note

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

      SST
      09843-18040

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      IM1-8 (PAON) - IM1-7 (P-AB) Always Below 1 Ω
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly *2 Center Airbag Sensor Assembly
      *3 No. 5 Instrument Panel Wire *4 No. 2 Instrument Panel Wire
      *5 Instrument Panel Wire *6

      Front view of wire harness connector

      (to Instrument Panel Wire)
      *7

      Front view of wire harness connector

      (to No. 5 Instrument Panel Wire)

      		 *8 Connector D
      *9 Connector E - -

    NG

    REPLACE NO. 2 INSTRUMENT PANEL WIRE

    OK

    REPLACE NO. 5 INSTRUMENT PANEL WIRE

  19. CHECK INSTRUMENT PANEL WIRE (SHORT)


    1. A01J8HME01
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly
      *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4

      Front view of wire harness connector

      (to No. 2 Instrument Panel Wire)
      *5 Connector C

      Disconnect the instrument panel wire from the No. 2 instrument panel wire.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      LI2-2 (PAON) - LI2-14 (P-AB) Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  20. CHECK NO. 2 INSTRUMENT PANEL WIRE (SHORT)


    1. A01JCHDE01
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly
      *2 Center Airbag Sensor Assembly
      *3 No. 5 Instrument Panel Wire
      *4 No. 2 Instrument Panel Wire
      *5 Instrument Panel Wire
      *6

      Front view of wire harness connector

      (to No. 5 Instrument Panel Wire)
      *7 Connector E

      Disconnect the No. 2 instrument panel wire from the No. 5 instrument panel wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      IM1-8 (PAON) - IM1-7 (P-AB) Always 1 MΩ or higher

    NG

    REPLACE NO. 2 INSTRUMENT PANEL WIRE

    OK

    REPLACE NO. 5 INSTRUMENT PANEL WIRE

  21. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)


    1. A01J8HME01
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly
      *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4

      Front view of wire harness connector

      (to No. 2 Instrument Panel Wire)
      *5 Connector C

      Disconnect the instrument panel wire from the No. 2 instrument panel wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      LI2-2 (PAON) - Body ground Always 1 MΩ or higher
      LI2-14 (P-AB) - Body ground Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  22. CHECK NO. 2 INSTRUMENT PANEL WIRE (SHORT TO GROUND)


    1. A01JCHDE01
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly
      *2 Center Airbag Sensor Assembly
      *3 No. 5 Instrument Panel Wire
      *4 No. 2 Instrument Panel Wire
      *5 Instrument Panel Wire
      *6

      Front view of wire harness connector

      (to No. 5 Instrument Panel Wire)
      *7 Connector E

      Disconnect the No. 2 instrument panel wire from the No. 5 instrument panel wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      IM1-8 (PAON) - Body ground Always 1 MΩ or higher
      IM1-7 (P-AB) - Body ground Always 1 MΩ or higher

    NG

    REPLACE NO. 2 INSTRUMENT PANEL WIRE

    OK

    REPLACE NO. 5 INSTRUMENT PANEL WIRE

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


    1. A01J8HME01
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly
      *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4

      Front view of wire harness connector

      (to No. 2 Instrument Panel Wire)
      *5 Connector C

      Turn the power 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 instrument panel wire from the No. 2 instrument panel wire.

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

    5. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      LI2-2 (PAON) - Body ground Power switch on (IG) Below 1 V
      LI2-14 (P-AB) - Body ground Power switch on (IG) Below 1 V

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  24. CHECK NO. 2 INSTRUMENT PANEL WIRE (SHORT TO B+)


    1. A01JCHDE01
      Text in Illustration
      *1 Passenger Seat Belt Warning Light Assembly
      *2 Center Airbag Sensor Assembly
      *3 No. 5 Instrument Panel Wire
      *4 No. 2 Instrument Panel Wire
      *5 Instrument Panel Wire
      *6

      Front view of wire harness connector

      (to No. 5 Instrument Panel Wire)
      *7 Connector E

      Turn the power 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 No. 2 instrument panel wire from the No. 5 instrument panel wire.

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

    5. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      IM1-8 (PAON) - Body ground Power switch on (IG) Below 1 V
      IM1-7 (P-AB) - Body ground Power switch on (IG) Below 1 V

    NG

    REPLACE NO. 2 INSTRUMENT PANEL WIRE

    OK

    REPLACE NO. 5 INSTRUMENT PANEL WIRE