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AIRBAG SYSTEM SRS Warning Light does not Come ON

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DTC Code DTC Name
  SRS Warning Light does not Come ON
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DESCRIPTION

The SRS warning light is located on the combination meter assembly.

When the SRS is normal, the SRS warning light comes on for approximately 6 seconds after the engine switch is turned from off to on (IG), and then goes off automatically.

If there is a malfunction in the SRS, the SRS warning light comes on to inform the driver of a problem.

When terminals TC and CG of the DLC3 are connected, the DTC is displayed by blinking of the SRS warning light.

The SRS is equipped with a voltage-increase circuit (DC-DC converter) in the center airbag sensor assembly in case the source voltage drops.

When the battery voltage drops, the voltage-increase circuit (DC-DC converter) functions to increase the voltage of the SRS to normal voltage.

A malfunction in this circuit is not recorded in the center airbag sensor assembly. The SRS warning light automatically goes off when the source voltage returns to normal.

The signal to illuminate the SRS warning light is transmitted from the center airbag sensor assembly to the combination meter assembly through the CAN communication system.

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WIRING DIAGRAM

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INSPECTION PROCEDURE

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PROCEDURE


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    CHECK BATTERY VOLTAGE


    1. Measure the voltage of the battery.

      Standard Voltage
      11 to 14 V
      Table 1. Result
      Result Proceed to
      OK A
      NG (for 2GR-FE) B
      NG (for 1AR-FE) C

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    CHECK CONNECTOR


    1. Turn the engine switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

      Note:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    3. Check that the connector is properly connected to the combination meter assembly.

      OK
      The connector is properly connected.
      Tip:

      If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

    4. Disconnect the connector from the combination meter assembly.

    5. Check that the terminal of the connector is not damaged.

      OK
      The terminal is not deformed or damaged.

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    CHECK WIRE HARNESS (COMBINATION METER ASSEMBLY - BODY GROUND)


    1. A019LN5E02

      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
      F16-1 (IG+) - Body ground Engine switch on (IG) 11 to 14 V
      F16-13 (B) - Body ground Always 11 to 14 V

    4. Turn the engine switch off.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F16-6 (ES) - Body ground Always Below 1 Ω
      Table 2. Text in Illustration
      *1

      Front view of wire harness connector

      (to Combination Meter Assembly)

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    CHECK SRS WARNING LIGHT


    1. Disconnect the cable from the negative (-) battery terminal.

      Note:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    2. Connect the connector to the combination meter assembly.

    3. Disconnect the connector from the center airbag sensor assembly.

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

    5. Turn the engine switch on (IG).

    6. Check the SRS warning light condition.

      OK
      After the primary check period, SRS warning light goes off for approximately 10 seconds and turns back on.
      Tip:

      The primary check period is approximately 6 seconds after the engine switch switch is turned to on (IG).


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    INSPECT CHARGING SYSTEM AND BATTERYClick here

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    REPLACE WIRE HARNESS

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    REPLACE CENTER AIRBAG SENSOR ASSEMBLYClick here

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    REPLACE COMBINATION METER ASSEMBLYClick here

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    INSPECT CHARGING SYSTEM AND BATTERYClick here