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 accessory meter assembly (passenger airbag ON/OFF indicator).

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.

  • Accessory meter assembly malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • No. 2 Instrument panel wire

  • No. 3 Instrument panel wire

  • Accessory meter assembly (Passenger airbag ON/OFF indicator)

  • Center airbag sensor assembly

WIRING DIAGRAM

A01EJMXE01

INSPECTION PROCEDURE

Tech Tips


  • Perform the simulation method by selecting check mode (Signal Check) using the GTS Click here.

  • After selecting check mode (Signal Check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road Click here.

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.

      Tech Tips

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

      A01EMBIE52
      Result
      ON/OFF Indicator Illumination Proceed to
      Always ON A
      OFF B

    B

    CHECK CONNECTORS Click here

    A

  2. CHECK CONNECTORS


    1. Turn the ignition switch off.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

    3. Check that the connectors are properly connected to the center airbag sensor assembly and accessory meter assembly. Also check that the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 3 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 accessory meter assembly. Also disconnect the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 3 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. A01EIV5

      Connect the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 3 instrument panel wire.

    2. Connect the connector to the accessory meter assembly.

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

    4. Turn the ignition switch to ON.

    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. A01EKE9E01
      Text in Illustration
      *1 Accessory Meter 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 ignition switch to ON, and wait for at least 60 seconds.

    4. Clear the DTCs stored in memory Click here.

    5. Turn the ignition switch off.

    6. Turn the ignition switch to ON, 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 ignition switch off.

      A01ELGYE02

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

    3. Connect the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 3 instrument panel wire.

    4. Disconnect the connector from the accessory meter 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
      F2-23 (PAON) - F2-11 (P/AB) Always Below 1 Ω
      Text in Illustration
      *1 Accessory Meter 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 Accessory Meter Assembly)
      *5 Connector B *6 Connector E

    NG

    CHECK WIRE HARNESS (OPEN) Click here

    OK

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


    1. A01EKKTE02
      Text in Illustration
      *1 Accessory Meter Assembly
      *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Accessory Meter Assembly)
      *4 Connector E

      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
      F2-23 (PAON) - F2-11 (P/AB) Always 1 MΩ or higher

    NG

    CHECK WIRE HARNESS (SHORT) Click here

    OK

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


    1. A01EKKTE02
      Text in Illustration
      *1 Accessory Meter Assembly
      *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Accessory Meter Assembly)
      *4 Connector E

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F2-23 (PAON) - Body ground Always 1 MΩ or higher
      F2-11 (P/AB) - Body ground Always 1 MΩ or higher

    NG

    CHECK WIRE HARNESS (SHORT TO GROUND) Click here

    OK

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


    1. A01EKKTE02
      Text in Illustration
      *1 Accessory Meter Assembly
      *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Accessory Meter Assembly)
      *4 Connector E

      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 Switch Condition Specified Condition
      F2-23 (PAON) - Body ground Ignition switch ON Below 1 V
      F2-11 (P/AB) - Body ground Ignition switch ON Below 1 V

    NG

    CHECK WIRE HARNESS (SHORT TO B+) Click here

    OK

    REPLACE ACCESSORY METER ASSEMBLY Click here

  9. CHECK CONNECTORS


    1. Turn the ignition switch off.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

    3. Check that the connectors are properly connected to the center airbag sensor assembly and accessory meter assembly. Also check that the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 3 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 accessory meter assembly. Also disconnect the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 3 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. 3 instrument panel wire.

      A01ELGYE02

    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
      F2-23 (PAON) - F2-11 (P/AB) Always Below 1 Ω
      Text in Illustration
      *1 Accessory Meter 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 Accessory Meter Assembly)
      *5 Connector B *6 Connector E

    NG

    CHECK WIRE HARNESS (OPEN) Click here

    OK

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


    1. A01EKKTE02
      Text in Illustration
      *1 Accessory Meter Assembly
      *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Accessory Meter Assembly)
      *4 Connector E

      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
      F2-23 (PAON) - F2-11 (P/AB) Always 1 MΩ or higher

    NG

    CHECK WIRE HARNESS (SHORT) Click here

    OK

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


    1. A01EKKTE02
      Text in Illustration
      *1 Accessory Meter Assembly
      *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Accessory Meter Assembly)
      *4 Connector E

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F2-23 (PAON) - Body ground Always 1 MΩ or higher
      F2-11 (P/AB) - Body ground Always 1 MΩ or higher

    NG

    CHECK WIRE HARNESS (SHORT TO GROUND) Click here

    OK

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


    1. A01EKKTE02
      Text in Illustration
      *1 Accessory Meter Assembly
      *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Accessory Meter Assembly)
      *4 Connector E

      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 Switch Condition Specified Condition
      F2-23 (PAON) - Body ground Ignition switch ON Below 1 V
      F2-11 (P/AB) - Body ground Ignition switch ON Below 1 V

    NG

    CHECK WIRE HARNESS (SHORT TO B+) Click here

    OK

  14. CHECK ACCESSORY METER ASSEMBLY (SOURCE VOLTAGE)


    1. A01ELLWE06
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Accessory Meter Assembly)

      Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F2-13 (IG+) - Body ground Ignition switch ON 10 to 14 V

    NG

    REPLACE WIRE HARNESS (ACCESSORY METER ASSEMBLY - BATTERY) OR BATTERY

    OK

  15. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. A01EJUWE12
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)

      Turn the ignition switch off.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

    3. Connect the connector to the accessory meter assembly.

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

    5. Turn the ignition switch to ON.

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

      Result
      Tester Connection Switch Condition Passenger Airbag ON/OFF Indicator
      D6-23 (PAON) - Body ground Ignition switch ON "ON" comes on
      D6-17 (P-AB) - Body ground Ignition switch ON "OFF" comes on

    NG

    REPLACE ACCESSORY METER ASSEMBLY Click here

    OK

  16. CHECK CENTER AIRBAG SENSOR ASSEMBLY


    1. A01EKE9E01
      Text in Illustration
      *1 Accessory Meter Assembly
      *2 Center Airbag Sensor Assembly

      Turn the ignition switch off.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

    3. Connect the connector to the center airbag sensor assembly.

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

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

    6. Clear the DTCs stored in memory Click here.

    7. Turn the ignition switch off.

    8. Turn the ignition switch to ON, 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 WIRE HARNESS (OPEN)


    1. Disconnect the wire harness from the No. 3 instrument panel wire.

      A01EJYIE01

      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
      EF2-10 (PAON) - EF2-1 (P-AB) Always Below 1 Ω
      Text in Illustration
      *1 Accessory Meter Assembly *2 Center Airbag Sensor Assembly
      *3 No. 3 Instrument Panel Wire *4 Wire Harness
      *5

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)

      		 *6

      Front view of wire harness connector

      (to No. 3 Instrument Panel Wire)
      *7 Connector B *8 Connector C

    NG

    REPLACE WIRE HARNESS

    OK

    REPLACE NO. 3 INSTRUMENT PANEL WIRE

  18. CHECK WIRE HARNESS (SHORT)


    1. A01EIPDE01
      Text in Illustration
      *1 Accessory Meter Assembly
      *2 Center Airbag Sensor Assembly
      *3 No. 3 Instrument Panel Wire
      *4 Wire Harness
      *5

      Front view of wire harness connector

      (to No. 3 Instrument Panel Wire)
      *6 Connector C

      Disconnect the wire harness from the No. 3 instrument panel wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      EF2-10 (PAON) - EF2-1 (P-AB) Always 1 MΩ or higher

    NG

    REPLACE WIRE HARNESS

    OK

    REPLACE NO. 3 INSTRUMENT PANEL WIRE

  19. CHECK WIRE HARNESS (SHORT TO GROUND)


    1. A01EIPDE01
      Text in Illustration
      *1 Accessory Meter Assembly
      *2 Center Airbag Sensor Assembly
      *3 No. 3 Instrument Panel Wire
      *4 Wire Harness
      *5

      Front view of wire harness connector

      (to No. 3 Instrument Panel Wire)
      *6 Connector C

      Disconnect the wire harness from the No. 3 instrument panel wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      EF2-10 (PAON) - Body ground Always 1 MΩ or higher
      EF2-1 (P-AB) - Body ground Always 1 MΩ or higher

    NG

    REPLACE WIRE HARNESS

    OK

    REPLACE NO. 3 INSTRUMENT PANEL WIRE

  20. CHECK WIRE HARNESS (SHORT TO B+)


    1. A01EIPDE01
      Text in Illustration
      *1 Accessory Meter Assembly
      *2 Center Airbag Sensor Assembly
      *3 No. 3 Instrument Panel Wire
      *4 Wire Harness
      *5

      Front view of wire harness connector

      (to No. 3 Instrument Panel Wire)
      *6 Connector C

      Turn the ignition switch off.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

    3. Disconnect the wire harness from the No. 3 instrument panel wire.

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

    5. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      EF2-10 (PAON) - Body ground Ignition switch ON Below 1 V
      EF2-1 (P-AB) - Body ground Ignition switch ON Below 1 V

    NG

    REPLACE WIRE HARNESS

    OK

    REPLACE NO. 3 INSTRUMENT PANEL WIRE