AIRBAG SYSTEM SRS Warning Light Remains ON

DESCRIPTION

The SRS warning light is located on the combination meter. When the SRS is normal, the SRS warning light illuminates for approximately 6 seconds after the ignition switch is turned from OFF to ON, and then turns OFF automatically. If there is a malfunction in the SRS, the SRS warning light illuminates to inform the driver. When terminals TC and CG of the DLC3 are connected, the DTCs are communicated through SRS warning light blinking patterns.

WIRING DIAGRAM

A01J659E04

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT BATTERY


    1. Measure the voltage of the battery.

      Standard voltage
      11 to 14 V

    NG

    RECHARGE OR REPLACE BATTERY

    OK

  2. CHECK CONNECTION OF CONNECTOR


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

    2. Check that the connector is properly connected to the center airbag sensor.

      OK
      Connector is connected.

    NG

    CONNECT CONNECTOR

    OK

  3. PREPARE FOR INSPECTION

    CAUTION:

    Be sure to perform the following procedures before troubleshooting to avoid unexpected airbag deployment.


    1. Disconnect the connector from the center airbag sensor.

    2. Disconnect the connector from the steering pad connector.


    NEXT

  4. CHECK CENTER AIRBAG SENSOR ASSEMBLY

    A01J4WSE06

    1. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

    2. Turn the ignition switch ON.

    3. Measure the voltage and resistance of the wire harness side connector.

      Standard voltage
      Tester Connection Specified Condition
      A24-21 (IG2) - Body ground 11 to 14 V
      Standard resistance
      Tester Connection Specified Condition
      A24-25 (E1) - Body ground Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  5. CHECK COMBINATION METER ASSEMBLY (POWER SOURCE)

    A01J30QE28

    1. Disconnect the C27 meter connector.

    2. Turn the ignition switch ON.

    3. Measure the voltage of the wire harness side connector.

      Standard voltage
      Tester Connection Specified Condition
      C27-21 - Body ground 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  6. CHECK WIRE HARNESS (CENTER AIRBAG SENSOR ASSEMBLY - COMBINATION METER ASSEMBLY)

    A01J5E0E21

    1. Disconnect the A24 ECU connector.

    2. Disconnect the C27 meter connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance
      Tester Connection Specified Condition
      A24-14 (LA) - C27-20 Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  7. CHECK SRS WARNING LIGHT OPERATION


    1. Disconnect the A24 ECU connector with the C27 meter connector connected.

    2. Turn the ignition switch ON.

    3. Check that the warning light illuminates for 6 seconds after turning the ignition switch ON.

      OK
      Warning light illuminates for 6 seconds after turning ignition switch ON.

    NG

    REPLACE COMBINATION METER ASSEMBLY

    OK

  8. CHECK CENTER AIRBAG SENSOR ASSEMBLY

    A01J4WSE07

    1. Disconnect the A24 ECU connector.

    2. Turn the ignition switch ON.

    3. Measure the voltage of the wire harness side connector.

      Standard voltage
      Tester Connection Specified Condition
      A24-14 (LA) - Body ground 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  9. REPLACE CENTER AIRBAG SENSOR ASSEMBLY


    1. Replace the center airbag sensor.

    2. Check that the SRS warning light illuminates normally.

      OK
      SRS warning light illuminates normally.

    NG

    REPLACE COMBINATION METER ASSEMBLY

    OK

    END