Inspection Procedure

HINT:

• Perform the simulation method by selecting the "CHECK MODE" (signal check) with the intelligent tester (see CHECK MODE PROCEDURE ).
• After selecting the "CHECK MODE" (signal check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road (see CHECK MODE PROCEDURE ).

1. CHECK FRONT SEAT OUTER BELT ASSEMBLY LH (DRIVER SIDE FRONT PRETENSIONER SQUIB) 
   1. Turn the ignition switch OFF.
   2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
   3. Disconnect the connectors from the front seat outer belt LH.
   4. Connect the white wire side of SST (resistance 2.1 Ω) to connector C.
      CAUTION: Never connect a tester to the front seat outer belt LH (driver side front pretensioner squib) for measurement, as this may lead to a serious injury due to airbag deployment.
      NOTE:

      • Do not forcibly insert SST into the terminals of the connector when connecting.
      • Insert SST straight into the terminals of the connector.

      SST 09843-18060 

   5. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
   6. Turn the ignition switch ON, and wait for at least 60 seconds.
   7. Clear the DTCs (see DTC CHECK / CLEAR ).
   8. Turn the ignition switch OFF.
   9. Turn the ignition switch ON, and wait for at least 60 seconds.
   10. Check the DTCs (see DTC CHECK / CLEAR ).
   Fig 1: Checking Front Seat Outer Belt Assembly LH

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: DTC B1900, B1901, B1902, B1903 or 73 is not output. 

   HINT:

   DTCs other than DTC B1900, B1901, B1902, B1903 or 73 may be output at this time, but they are not related to this check.

   OK: REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH 

   NG: GO to Next Step 

2. CHECK CONNECTOR 
   1. Turn the ignition switch OFF.
   2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
   3. Disconnect SST from connector C.
   4. Check that the floor wire connector (on the driver side front seat outer belt LH) is not damaged.

   OK: The lock button is not disengaged, or the claw of the lock is not deformed or damaged. 

   NG: REPAIR OR REPLACE FLOOR WIRE 

   OK: GO to Next Step 

3. CHECK FLOOR WIRE (DRIVER SIDE FRONT PRETENSIONER SQUIB CIRCUIT) 
   1. Disconnect the connector from the center airbag sensor.
   2. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
   3. Turn the ignition switch ON.
   4. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      K8-1 (L-) - Body ground	Below 1 V
      K8-2 (L+) - Body ground	Below 1 V

   5. Turn the ignition switch OFF.
   6. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
   7. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      K8-1 (L-) - K8-2 (L+)	Below 1 Ω
      K8-1 (L-) - Body ground	1 MΩ or higher
      K8-2 (L+) - Body ground	1 MΩ or higher

      Fig 2: Checking Floor Wire

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   8. Release the activation prevention mechanism built into connector B (see DIAGNOSIS SYSTEM ).
   9. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      K8-1 (L-) - K8-2 (L+)	1 MΩ or higher

   NG: REPAIR OR REPLACE FLOOR WIRE 

   OK: REPLACE CENTER AIRBAG SENSOR ASSEMBLY