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AIRBAG SYSTEM Trouble in Passenger Airbag ON/OFF Indicator

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DTC Code DTC Name
  Trouble in Passenger Airbag ON/OFF Indicator
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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 airbag assembly and lower No. 2 instrument panel airbag assembly status (activated or deactivated).

Tip:

Approximately 6 seconds after the engine switch is turned on (IG), 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
Table 1. *a Airbag Cut Off Switch Cylinder Sub-assembly *b Airbag ECU Assembly
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

After turning the engine 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.

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Tip:

Terminals O50-11 (MSW+) and O50-12 (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.

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PROCEDURE


  1. Click here

    CHECK SRS WARNING LIGHT


    1. Turn the engine switch on (IG), and check the SRS warning light condition.

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

      • 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 engine switch is turned on (IG).

      Result
      Proceed to
      OK
      NG

  2. Click here

    CHECK CONNECTORS


    1. Turn the engine 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 ECU assembly and airbag cut off switch cylinder sub-assembly.

      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 ECU 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

  3. Click here

    CHECK INSTRUMENT PANEL WIRE (OPEN)


    1. B0067SRC03
      *1 Airbag Cut Off Switch Cylinder Sub-assembly
      *2 Airbag ECU Assembly
      *3 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to 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
      O93-2 (PMC+) - O93-1 (PMC-) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

  4. Click here

    CHECK INSTRUMENT PANEL WIRE (SHORT)


    1. B0067SRC03
      *1 Airbag Cut Off Switch Cylinder Sub-assembly
      *2 Airbag ECU Assembly
      *3 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Airbag Cut Off Switch Cylinder Sub-assembly)

      Release the activation prevention mechanism built into connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O93-2 (PMC+) - O93-1 (PMC-) Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

  5. Click here

    CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)


    1. B0067SRC03
      *1 Airbag Cut Off Switch Cylinder Sub-assembly
      *2 Airbag ECU Assembly
      *3 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Airbag Cut Off Switch Cylinder Sub-assembly)

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

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      O93-2 (PMC+) - Body ground Engine switch on (IG) Below 1 V
      O93-1 (PMC-) - Body ground Engine switch on (IG) Below 1 V

    4. Turn the engine 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

  6. Click here

    CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)


    1. B0067SRC03
      *1 Airbag Cut Off Switch Cylinder Sub-assembly
      *2 Airbag ECU Assembly
      *3 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to 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
      O93-2 (PMC+) - Body ground Always 1 MΩ or higher
      O93-1 (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

  7. Click here

    CHECK AIRBAG CUT OFF SWITCH CYLINDER SUB-ASSEMBLY


    1. B0064ZMC03
      *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 ECU ASSEMBLYClick here

    • NG

      REPLACE AIRBAG CUT OFF SWITCH CYLINDER SUB-ASSEMBLYClick here