Airbag System Srs Warning Light Remains On


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT BATTERY

CHECK CONNECTION OF CONNECTOR

PREPARE FOR INSPECTION

CHECK CENTER AIRBAG SENSOR

CHECK COMBINATION METER (POWER SOURCE)

CHECK WIRE HARNESS (CENTER AIRBAG SENSOR - COMBINATION METER)

CHECK SRS WARNING LIGHT (OPERATION)

CHECK CENTER AIRBAG SENSOR

REPLACE CENTER AIRBAG SENSOR

AIRBAG SYSTEM - SRS Warning Light Remains ON


DESCRIPTION

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

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Supplemental Restraint System.Airbag System.Airbag System Srs Warning Light Remains On


INSPECTION 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.

  1. 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.

  1. Disconnect the connector from the steering pad connector.


NEXT


4.CHECK CENTER AIRBAG SENSOR
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Supplemental Restraint System.Airbag System.Airbag System Srs Warning Light Remains On

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

  1. Turn the ignition switch ON.

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

    Standard voltage:
    Tester Connection
    		Specified Condition
    A24-21 (IG2) - Body ground
    		8 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 (POWER SOURCE)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Supplemental Restraint System.Airbag System.Airbag System Srs Warning Light Remains On

  1. Disconnect the C10 meter connector.

  1. Turn the ignition switch ON.

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

    Standard voltage:
    Tester Connection
    		Specified Condition
    C10-21 - Body ground
    		8 to 14 V


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


6.CHECK WIRE HARNESS (CENTER AIRBAG SENSOR - COMBINATION METER)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Supplemental Restraint System.Airbag System.Airbag System Srs Warning Light Remains On

  1. Disconnect the A24 sensor connector.

  1. Disconnect the C10 meter connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    A24-14 (LA) - C10-20
    		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 C10 meter connector connected.

  1. Turn the ignition switch ON.

  1. 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
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Supplemental Restraint System.Airbag System.Airbag System Srs Warning Light Remains On

  1. Disconnect the A24 sensor connector.

  1. Turn the ignition switch ON.

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

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


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


9.REPLACE CENTER AIRBAG SENSOR

  1. Replace the center airbag sensor.

  1. Check that the SRS warning light illuminates normally.

    OK:
    SRS warning light illuminates normally.


NG
REPLACE COMBINATION METER ASSEMBLY
OK

END