AIRBAG SYSTEM Trouble in Passenger Airbag ON/OFF Indicator

DESCRIPTION

This circuit detects the airbag cut off switch cylinder sub-assembly status.

The passenger airbag ON/OFF indicator comes on to inform the driver of the instrument panel passenger without door airbag assembly status (activated or deactivated).

Tech Tips

Approximately 6 seconds after the ignition switch is turned ON, the passenger airbag ON/OFF indicator will indicate ON/OFF depending on the following conditions.

Airbag Cut Off Switch Cylinder Sub-assembly Passenger Airbag ON/OFF Indicator SRS Warning Light
ON Indicator OFF Indicator
ON ON OFF OFF
OFF OFF ON OFF
Switch failure OFF ON ON

WIRING DIAGRAM

B008KOQE24
*a Airbag Cut Off Switch Cylinder Sub-assembly
*b Airbag Sensor Assembly

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 here

Tech Tips

Terminals F70-11 (MSW+) and F70-12 (MSW-) 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, short to ground or short to B+), this mechanism should be released.

PROCEDURE


  1. CHECK SRS WARNING LIGHT


    1. Turn the ignition switch ON, and check the SRS warning light condition.

      OK
      After the primary check period, the SRS warning light goes off.

      Tech Tips


      • If the SRS warning light is on when this malfunction occurs, a DTC is stored. Troubleshoot for the stored DTC.

      • The primary check period is approximately 6 seconds after the ignition switch is turned ON.

      Result
      Proceed to
      OK
      NG

    NG

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    OK

  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 airbag cut off switch cylinder sub-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 airbag cut off switch cylinder sub-assembly.

    5. Check that the terminals of the connectors are not deformed or 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 connector are not deformed or damaged.

      OK
      The short springs are not deformed or damaged.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  3. CHECK INSTRUMENT PANEL WIRE (OPEN)


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

      B008KQEC01
      *A w/o Dual-stage SRS *B w/ Dual-stage SRS
      *1 Airbag Cut Off Switch Cylinder Sub-assembly *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire - -
      *a

      Front view of wire harness connector

      (to Airbag Cut Off Switch Cylinder Sub-assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      F64-2 (PMC+) - F64-1 (PMC-) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  4. CHECK INSTRUMENT PANEL WIRE (SHORT)


    1. Release the activation prevention mechanism built into connector B.

      Click here

      B008KQEC01
      *A w/o Dual-stage SRS *B w/ Dual-stage SRS
      *1 Airbag Cut Off Switch Cylinder Sub-assembly *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire - -
      *a

      Front view of wire harness connector

      (to Airbag Cut Off Switch Cylinder Sub-assembly)

      		 - -

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F64-2 (PMC+) - F64-1 (PMC-) Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

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


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

      B008KQEC01
      *A w/o Dual-stage SRS *B w/ Dual-stage SRS
      *1 Airbag Cut Off Switch Cylinder Sub-assembly *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire - -
      *a

      Front view of wire harness connector

      (to Airbag Cut Off Switch Cylinder Sub-assembly)

      		 - -

    2. Turn the ignition switch ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F64-2 (PMC+) - Body ground Ignition switch ON Below 1 V
      F64-1 (PMC-) - Body ground Ignition switch ON Below 1 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

    REPLACE INSTRUMENT PANEL WIRE

    OK

  6. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)


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

      B008KQEC01
      *A w/o Dual-stage SRS *B w/ Dual-stage SRS
      *1 Airbag Cut Off Switch Cylinder Sub-assembly *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire - -
      *a

      Front view of wire harness connector

      (to Airbag Cut Off Switch Cylinder Sub-assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      F64-2 (PMC+) - Body ground Always 1 MΩ or higher
      F64-1 (PMC-) - Body ground Always 1 MΩ or higher

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

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  7. CHECK AIRBAG CUT OFF SWITCH CYLINDER SUB-ASSEMBLY


    1. B008LZ4C16
      *a

      Component without harness connected

      (Airbag Cut Off Switch Cylinder Sub-assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (PMC+) - 1 (PMC-) Cut off switch in ON position 360 to 440 Ω
      2 (PMC+) - 1 (PMC-) Cut off switch in OFF position 90 to 110 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    NG

    REPLACE AIRBAG CUT OFF SWITCH CYLINDER SUB-ASSEMBLY Click here