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Home >> Toyota >> 2008 >> FJ Cruiser RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 194 (Supplemental Restraint System) >> Airbag System >> SRS Warning Light Remains ON >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: In order to prevent unexpected airbag deployment, disconnect the following connectors before inspecting parts such as wire harnesses, if the application of tester probes to the center airbag sensor assembly connector is necessary.
  1. Turn the ignition switch to the lock position.
  2. Disconnect the negative (-) terminal cable from the battery and wait for at least 90 seconds.
  3. Disconnect the connector from the center airbag sensor assembly.
  4. Disconnect the connectors from the steering pad.
  5. Disconnect the connectors from the front passenger airbag assembly.
  6. Disconnect the connector from the front seat outer belt assembly LH.
  7. Disconnect the connector from the front seat outer belt assembly RH.

    HINT:

    Skip the following steps if side and curtain shield airbags are not fitted.

  8. Disconnect the connector from the front seat side airbag assembly LH.
  9. Disconnect the connector from the front seat side airbag assembly RH.
  10. Disconnect the connector from the curtain shield airbag assembly LH.
  11. Disconnect the connector from the curtain shield airbag assembly RH.
  1. CHECK DTC (CAN COMMUNICATION SYSTEM) 
    1. Turn the ignition switch to the on position.
    2. Check the DTCs (See DIAGNOSIS SYSTEM ).

      OK: DTC is not output. 

    NG: CHECK CAN COMMUNICATION SYSTEM 

    OK: GO TO NEXT STEP 

  2. CHECK BATTERY 
    1. Measure the voltage of the battery.

      Standard voltage: 

      11 to 14 V 

    NG: CHECK AND REPLACE BATTERY OR CHARGING SYSTEM 

    OK: GO TO NEXT STEP 

  3. CHECK CONNECTION OF CONNECTORS 
    1. Turn the ignition switch off.
    2. Disconnect the negative (-) terminal cable from the battery 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 

    OK: GO TO NEXT STEP 

  4. CHECK HARNESS AND CONNECTOR (SOURCE VOLTAGE OF CENTER AIRBAG SENSOR ASSEMBLY) 
    1. Disconnect the connectors from the center airbag sensor assembly.
    2. Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
    3. Turn the ignition switch on.
    4. Operate all components of the electrical system (defogger, wipers, headlights, heater blower, etc.).
    5. Measure the voltage.
      Fig 1: Checking Harness And Connector (Source Voltage Of Center Airbag Sensor Assembly)
      G04830144Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      D16-21 (IG2)-Body ground Ignition switch on 11 to 14 V
    6. Turn the ignition switch off.
    7. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      D16-25(E1)-Body ground Always Below 1 Ω
      D16-26(E2)-Body ground Always Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO NEXT STEP 

  5. CHECK HARNESS AND CONNECTOR (SOURCE VOLTAGE OF COMBINATION METER) 
    1. Disconnect the negative (-) terminal cable from the battery and wait for at least 90 seconds.
    2. Disconnect the connector from the combination meter.
    3. Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
    4. Turn the ignition switch on. Measure the voltage.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      D1-1 (IG2) - Body ground Ignition switch on 11 to 14 V
    5. Turn the ignition switch off.
    6. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      D1-24(ET) - Body ground Always Below 1 Ω
      7. Fig 2: Checking Harness And Connector (Source Voltage Of Combination Meter)
      G04830145Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO NEXT STEP 

  6. CHECK SRS WARNING LIGHT 
    1. Turn the ignition switch off.
    2. Disconnect the negative (-) terminal cable from the battery and wait for at least 90 seconds.
    3. Connect the connector to the combination meter.
    4. Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
    5. Turn the ignition switch 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. 

      HINT:

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

    NG:  GO TO METER / GAUGE SYSTEM (FOR SEDAN) or METER / GAUGE SYSTEM (FOR HATCHBACK)

    OK: REPLACE CENTER AIRBAG SENSOR ASSEMBLY 

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