AIRBAG SYSTEM SRS Warning Light Remains ON

DESCRIPTION

The SRS warning light is located on the combination meter.

When the SRS condition is normal, the SRS warning light illuminates for approximately 6 seconds after the ignition switch is turned from off to ON, and then goes off automatically.

If there is a malfunction in the SRS, the SRS warning light illuminates or blinks to inform the driver of the problem. When terminals TC and CG of the DLC3 are connected, the SRS warning light blinks to indicate DTCs.

The center airbag sensor assembly is equipped with a voltage-increase circuit (DC-DC converter) in case the source voltage decreases. When the battery voltage decreases, the voltage-increase circuit (DC-DC converter) boosts the SRS voltage up to the normal level.

Malfunctions relating to battery voltage decreases cause the SRS warning light to illuminate. However, no DTCs are recorded in the center airbag sensor assembly. The SRS warning light goes off automatically when the source voltage returns to normal.

Signals to illuminate the SRS warning light are transmitted from the center airbag sensor assembly to the combination meter through the CAN communication system.

WIRING DIAGRAM

A01193NE12

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)


    1. Turn the ignition switch to ON.

    2. Check the DTCs Click here.

      OK
      DTC is not output.

    NG

    GO TO CAN COMMUNICATION SYSTEM Click here

    OK

  2. INSPECT BATTERY


    1. Measure the voltage of the battery.

      Standard Voltage
      Tester Connection Condition Specified Condition
      Battery Always 11 to 14 V
      Result
      Result Proceed to
      OK A
      NG (for 1KR-FE) B
      NG (for 1ND-TV) C

    B

    CHECK AND REPLACE BATTERY OR CHARGING SYSTEM Click here

    C

    CHECK AND REPLACE BATTERY OR CHARGING SYSTEM Click here

    A

  3. CHECK CONNECTION OF 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 combination meter.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  4. CHECK HARNESS AND CONNECTOR (SOURCE VOLTAGE OF CENTER AIRBAG SENSOR ASSEMBLY)


    1. A0117OWE01
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Center Airbag Sensor Assembly)

      Disconnect the connectors from the center airbag sensor assembly.

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

    3. Turn the ignition switch to ON.

    4. Operate all components of the electrical system (defogger, wipers, headlights, heater blower, etc.).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition

      D43-21 (IG2) -

      D43-25 (E1)

      		 Ignition switch ON 11 to 14 V

      D43-21 (IG2) -

      D43-26 (E2)

      		 Ignition switch ON 11 to 14 V

    NG

    REPLACE HARNESS AND CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (SOURCE VOLTAGE OF COMBINATION METER)


    1. A0117WSE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Combination Meter)

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

    2. Disconnect the connector from the combination meter.

    3. Connect the cable to the negative battery terminal, and wait for at least 2 seconds.

    4. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition

      D1-1 (IG+) -

      D1-24 (ET)

      		 Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK SRS WARNING LIGHT


    1. 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 combination meter.

    4. Connect the cable to the negative battery terminal, and wait for at least 2 seconds.

    5. Turn the ignition switch to ON.

    6. Check the SRS warning light condition.

      OK
      The SRS warning light goes off after the primary check period and comes on again after approximately 10 seconds.

      Tech Tips

      The primary check period lasts for approximately 6 seconds after the ignition switch is turned to ON.


    NG

    REPLACE COMBINATION METER Click here

    OK

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here