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 clock 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. 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, 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

  • Clock assembly (Passenger airbag ON/OFF indicator)

  • Airbag sensor assembly

 Does not apply to test/check mode

WIRING DIAGRAM

A01KTJ5E14
*1 ECU-IG NO. 4
*2 from IG1 NO. 3 Relay
*3 Clock Assembly (Passenger Airbag ON/OFF Indicator)
*4 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

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

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

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  3. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. Connect the connector to the clock 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.
      Result
      Proceed to
      OK
      NG

    NG

    CHECK INSTRUMENT PANEL WIRE (OPEN) Click here

    OK

  4. CHECK DTC


    1. A01KS6BC01
      *1 Clock 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. Clear the DTCs stored in memory.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    6. Turn the power switch off.

    7. Turn the power switch on (IG), 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.

      Tech Tips

      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 here

    NG

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

  5. CHECK INSTRUMENT PANEL WIRE (OPEN)


    1. A01KTLSC01
      *1 Clock 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 Clock 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. Disconnect the connector from the clock 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
      E133-7 (PAON) - E133-6 (P-AB) Always Below 1 Ω

    6. Disconnect the service wire from connector B.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  6. CHECK INSTRUMENT PANEL WIRE (SHORT)


    1. A01KSWPC01
      *1 Clock Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Clock Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E133-7 (PAON) - E133-6 (P-AB) Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

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


    1. A01KSWPC01
      *1 Clock Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Clock 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
      E133-7 (PAON) - Body ground Power switch on (IG) Below 1 V
      E133-6 (P-AB) - Body ground Power switch on (IG) Below 1 V

    4. Turn the power switch off.

    5. 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.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  8. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)


    1. A01KSWPC01
      *1 Clock Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Clock Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E133-7 (PAON) - Body ground Always 1 MΩ or higher
      E133-6 (P-AB) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CLOCK 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 clock 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 clock 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

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  10. CHECK INSTRUMENT PANEL WIRE (OPEN)


    1. A01KTLSC01
      *1 Clock 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 Clock Assembly)

      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.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E133-7 (PAON) - E133-6 (P-AB) Always Below 1 Ω

    3. Disconnect the service wire from connector B.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  11. CHECK INSTRUMENT PANEL WIRE (SHORT)


    1. A01KSWPC01
      *1 Clock Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Clock Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E133-7 (PAON) - E133-6 (P-AB) Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

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


    1. A01KSWPC01
      *1 Clock Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Clock 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
      E133-7 (PAON) - Body ground Power switch on (IG) Below 1 V
      E133-6 (P-AB) - Body ground Power switch on (IG) Below 1 V

    4. Turn the power switch off.

    5. 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.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  13. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)


    1. A01KSWPC01
      *1 Clock Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Clock Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E133-7 (PAON) - Body ground Always 1 MΩ or higher
      E133-6 (P-AB) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

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


    1. A01KSWPC02
      *1 Clock Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Clock 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
      E133-10 (IG+) - Body ground power switch on (IG) 11 to 14 V

    4. Turn the power switch off.

    5. 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.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE WIRE HARNESS OR AUXILIARY BATTERY

    OK

  15. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. A01KRYWC03
      *1 Clock Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

      Connect the connector to the clock assembly.

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

    3. Turn the power switch on (IG).

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

      OK
      Terminal Connection Condition Specified Condition
      E14-23 (PAON) - Body ground Power switch on (IG) "ON" comes on
      E14-17 (P-AB) - Body ground Power switch on (IG) "OFF" comes on

    5. Turn the power switch off.

    6. 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.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CLOCK ASSEMBLY Click here

    OK

  16. CHECK DTC


    1. A01KS6BC01
      *1 Clock Assembly
      *2 Airbag Sensor Assembly

      Connect the connector to the airbag sensor assembly.

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

    3. Clear the DTCs stored in memory.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    4. Turn the power switch off.

    5. Turn the power switch on (IG), 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.

      Tech Tips

      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 here

    NG

    REPLACE AIRBAG SENSOR ASSEMBLY Click here