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 passenger airbag ON/OFF indicator (telltale light assembly).

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

  • Passenger airbag ON/OFF indicator malfunction

  • Airbag sensor assembly malfunction

  • Instrument panel wire

  • No. 2 instrument panel wire

  • Passenger airbag ON/OFF indicator (Telltale light assembly)

  • Airbag sensor assembly

Does not apply to test/check mode

WIRING DIAGRAM

C303983E01

CAUTION / NOTICE / HINT

Note:

  • After turning the ignition 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.

    Click hereClick here

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

Tip:

Terminals E36-24 (PAON) and E36-23 (P-AB) of the instrument panel wire in this circuit have an activation prevention mechanism.

This mechanism can be used to check for an open circuit in the wire harness. When performing other checks (check for short to ground or short to B+), this mechanism should be released.

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.

      Tip:

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

      Click hereClick here

    Result

    Result

    Proceed to

    ON/OFF Indicator illumination is always "ON".

    A

    ON/OFF Indicator illumination is always "OFF".

    B
    B

    CHECK CONNECTORSClick here

    A

  2. CHECK CONNECTORS

    1. Turn the ignition 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 sensor assembly and telltale light assembly. Also check that the connectors that link the No. 2 instrument panel wire and instrument panel wire are properly connected.

      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 sensor assembly and telltale light assembly. Also disconnect the connectors that link the No. 2 instrument panel wire and instrument panel wire.

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

      OK

      The terminals are not deformed or damaged.

    6. Check that the short springs of the activation prevention mechanism of the instrument panel wire are not deformed or damaged.

      OK

      The short springs are not deformed or damaged.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE WIRE HARNESS

    OK

  3. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

    1. Connect the connector to the telltale light assembly. Also connect the connectors that link the No. 2 instrument panel wire and instrument panel wire.

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

    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.

    Result

    Proceed to

    OK

    NG
    NG

    CHECK WIRE HARNESS (OPEN)Click here

    OK

  4. CHECK DTC

    1. C291778C01

      *1

      Telltale Light Assembly

      *2

      Airbag Sensor Assembly

      Turn the ignition 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 sensor assembly.

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

    5. Clear the DTCs stored in memory.

      Click here

      Body Electrical > SRS Airbag > Clear DTCs

    6. Turn the ignition switch off.

    7. Turn the ignition switch to ON, and wait for at least 60 seconds.

    8. Check for DTCs.

      Click here

      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
    OK

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick here

    NG

    REPLACE AIRBAG SENSOR ASSEMBLY

    Click here

  5. CHECK WIRE HARNESS (OPEN)

    1. C303981C01

      *1

      Telltale Light Assembly

      *2

      Airbag Sensor Assembly

      *a

      Front view of wire harness connector

      (to Telltale Light Assembly)

      Turn the ignition 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 telltale light assembly.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      F2-6 (PAON) - F2-5 (P-AB)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    CHECK INSTRUMENT PANEL WIRE (OPEN)Click here

    OK

  6. CHECK WIRE HARNESS (SHORT TO B+)

    1. C303981C01

      *1

      Telltale Light Assembly

      *2

      Airbag Sensor Assembly

      *a

      Front view of wire harness connector

      (to Telltale Light Assembly)

      Release the activation prevention mechanism built into connector B.

      Click hereClick here

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

    3. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      F2-6 (PAON) - Body ground

      Ignition switch ON

      Below 1 V

      F2-5 (P-AB) - Body ground

      Ignition switch ON

      Below 1 V

    5. Turn the ignition 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
    NG

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

    OK

  7. CHECK WIRE HARNESS (SHORT TO GROUND)

    1. C303981C01

      *1

      Telltale Light Assembly

      *2

      Airbag Sensor Assembly

      *a

      Front view of wire harness connector

      (to Telltale Light Assembly)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      F2-6 (PAON) - Body ground

      Always

      1 MΩ or higher

      F2-5 (P-AB) - Body ground

      Always

      1 MΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE TELLTALE LIGHT ASSEMBLY

    Click here

    NG

  8. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

    1. C303980C01

      *1

      Telltale Light Assembly

      *2

      Airbag Sensor Assembly

      *3

      No. 2 Instrument Panel Wire

      *4

      Instrument Panel Wire

      *a

      Front view of wire harness connector

      (to No. 2 Instrument Panel Wire)

      Disconnect the instrument panel wire connector 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

      EF1-11 (PAON) - Body ground

      Always

      1 MΩ or higher

      EF1-10 (P-AB) - Body ground

      Always

      1 MΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE NO. 2 INSTRUMENT PANEL WIRE

    NG

    REPLACE INSTRUMENT PANEL WIRE

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

    1. C303980C01

      *1

      Telltale Light Assembly

      *2

      Airbag Sensor Assembly

      *3

      No. 2 Instrument Panel Wire

      *4

      Instrument Panel Wire

      *a

      Front view of wire harness connector

      (to No. 2 Instrument Panel Wire)

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

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

    3. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      EF1-11 (PAON) - Body ground

      Ignition switch ON

      Below 1 V

      EF1-10 (P-AB) - Body ground

      Ignition switch ON

      Below 1 V

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE NO. 2 INSTRUMENT PANEL WIRE

    NG

    REPLACE INSTRUMENT PANEL WIRE

  10. CHECK INSTRUMENT PANEL WIRE (OPEN)

    1. C303980C01

      *1

      Telltale Light Assembly

      *2

      Airbag Sensor Assembly

      *3

      No. 2 Instrument Panel Wire

      *4

      Instrument Panel Wire

      *a

      Front view of wire harness connector

      (to No. 2 Instrument Panel Wire)

      Disconnect the instrument panel wire connector 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

      EF1-11 (PAON) - EF1-10 (P-AB)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE NO. 2 INSTRUMENT PANEL WIRE

    NG

    REPLACE INSTRUMENT PANEL WIRE

  11. CHECK CONNECTORS

    1. Turn the ignition 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 sensor assembly and telltale light assembly. Also check that the connectors that link the No. 2 instrument panel wire and instrument panel wire are properly connected.

      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 sensor assembly and telltale light assembly. Also disconnect the connectors that link the No. 2 instrument panel wire and instrument panel wire.

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

      OK

      The terminals are not deformed or damaged.

    6. Check that the short springs of the activation prevention mechanism of the instrument panel wire are not deformed or damaged.

      OK

      The short springs are not deformed or damaged.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE WIRE HARNESS

    OK

  12. CHECK WIRE HARNESS (OPEN)

    1. C303981C01

      *1

      Telltale Light Assembly

      *2

      Airbag Sensor Assembly

      *a

      Front view of wire harness connector

      (to Telltale Light Assembly)

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

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      F2-6 (PAON) - F2-5 (P-AB)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    CHECK INSTRUMENT PANEL WIRE (OPEN)Click here

    OK

  13. CHECK WIRE HARNESS (SHORT TO B+)

    1. C303981C01

      *1

      Telltale Light Assembly

      *2

      Airbag Sensor Assembly

      *a

      Front view of wire harness connector

      (to Telltale Light Assembly)

      Release the activation prevention mechanism built into connector B.

      Click hereClick here

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

    3. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      F2-6 (PAON) - Body ground

      Ignition switch ON

      Below 1 V

      F2-5 (P-AB) - Body ground

      Ignition switch ON

      Below 1 V

    5. Turn the ignition 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
    NG

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

    OK

  14. CHECK WIRE HARNESS (SHORT TO GROUND)

    1. C303981C01

      *1

      Telltale Light Assembly

      *2

      Airbag Sensor Assembly

      *a

      Front view of wire harness connector

      (to Telltale Light Assembly)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      F2-6 (PAON) - Body ground

      Always

      1 MΩ or higher

      F2-5 (P-AB) - Body ground

      Always

      1 MΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)Click here

    OK

  15. CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE)

    1. C303981C02

      *1

      Telltale Light Assembly

      *2

      Airbag Sensor Assembly

      *a

      Front view of wire harness connector

      (to Telltale Light Assembly)

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

    2. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      F2-1 (IG+) - Body ground

      Ignition switch ON

      11 to 14 V

    4. Turn the ignition 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
    NG

    REPAIR OR REPLACE WIRE HARNESS OR BATTERY

    OK

  16. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

    1. C303979C01

      *1

      Telltale Light Assembly

      *2

      Airbag Sensor Assembly

      *a

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

      Connect the connector to the telltale light assembly.

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

    3. Turn the ignition switch to ON.

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

      OK

      Terminal Connection

      Condition

      Specified Condition

      E36-24 (PAON) - Body ground

      Ignition switch ON

      "ON" comes on

      E36-23 (P-AB) - Body ground

      Ignition switch ON

      "OFF" comes on

    5. Turn the ignition 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.

    7. Restore the released activation prevention mechanism of connector B to the original condition.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE TELLTALE LIGHT ASSEMBLY

    Click here

    OK

  17. CHECK DTC

    1. C291778C01

      *1

      Telltale Light Assembly

      *2

      Airbag Sensor Assembly

      Connect the connector to the airbag sensor assembly.

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

    3. Clear the DTCs stored in memory.

      Click here

      Body Electrical > SRS Airbag > Clear DTCs

    4. Turn the ignition switch off.

    5. Turn the ignition switch to ON, and wait for at least 60 seconds.

    6. Check for DTCs.

      Click here

      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
    OK

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick here

    NG

    REPLACE AIRBAG SENSOR ASSEMBLY

    Click here

  18. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

    1. C303980C01

      *1

      Telltale Light Assembly

      *2

      Airbag Sensor Assembly

      *3

      No. 2 Instrument Panel Wire

      *4

      Instrument Panel Wire

      *a

      Front view of wire harness connector

      (to No. 2 Instrument Panel Wire)

      Disconnect the instrument panel wire connector 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

      EF1-11 (PAON) - Body ground

      Always

      1 MΩ or higher

      EF1-10 (P-AB) - Body ground

      Always

      1 MΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE NO. 2 INSTRUMENT PANEL WIRE

    NG

    REPLACE INSTRUMENT PANEL WIRE

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

    1. C303980C01

      *1

      Telltale Light Assembly

      *2

      Airbag Sensor Assembly

      *3

      No. 2 Instrument Panel Wire

      *4

      Instrument Panel Wire

      *a

      Front view of wire harness connector

      (to No. 2 Instrument Panel Wire)

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

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

    3. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      EF1-11 (PAON) - Body ground

      Ignition switch ON

      Below 1 V

      EF1-10 (P-AB) - Body ground

      Ignition switch ON

      Below 1 V

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE NO. 2 INSTRUMENT PANEL WIRE

    NG

    REPLACE INSTRUMENT PANEL WIRE

  20. CHECK INSTRUMENT PANEL WIRE (OPEN)

    1. C303980C01

      *1

      Telltale Light Assembly

      *2

      Airbag Sensor Assembly

      *3

      No. 2 Instrument Panel Wire

      *4

      Instrument Panel Wire

      *a

      Front view of wire harness connector

      (to No. 2 Instrument Panel Wire)

      Disconnect the instrument panel wire connector 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

      EF1-11 (PAON) - EF1-10 (P-AB)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE NO. 2 INSTRUMENT PANEL WIRE

    NG

    REPLACE INSTRUMENT PANEL WIRE