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.

HINT:

Perform the simulation method by selecting CHECK MODE (signal check) with the Techstream (See CHECK MODE PROCEDURE ).
After selecting 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 DIAGNOSIS SYSTEM ).

CHECK FRONT SEAT OUTER BELT ASSEMBLY LH (DRIVER SIDE FRONT PRETENSIONER SQUIB)
SST 09843-18060
1. Turn the ignition switch off.
2. Disconnect the negative (-) terminal cable from the battery and wait for at least 90 seconds.
3. Disconnect the connectors from the front seat outer belt assembly 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 assembly 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 the SST into the terminals of the connector when connecting.
  - Insert the SST straight into the terminals of the connector.
5. Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
6. Turn the ignition switch on and wait for at least 60 seconds.
7. Clear the DTCs stored in the memory (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 ).
  OK: DTC B1900, B1901, B1902, B1903 and 73 are not output.
  
  Fig 1: Checking Front Seat Outer Belt Assembly LH
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  
  DTCs other than DTC B1900, B1901, B1902, B1903 and 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
CHECK CONNECTOR
1. Turn the ignition switch off.
2. Disconnect the negative (-) terminal cable from the battery and wait for at least 90 seconds.
3. Disconnect the SST from connector C.
4. Check that the floor wire connector (on the front seat outer belt assembly LH side) is not damaged.
  OK: The lock button is not disengaged and the claw of the lock is not deformed or damaged.
NG: REPAIR OR REPLACE FLOOR WIRE

OK: GO TO NEXT STEP

CHECK FLOOR WIRE (DRIVER SIDE FRONT PRETENSIONER SQUIB CIRCUIT)

Disconnect the connectors from the center airbag sensor assembly.

Check for short to B+ in the circuit.

Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
Turn the ignition switch on.

Measure the voltage.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
J21-1 (L-) - Body ground	Ignition switch on	Below 1 V
J21-2 (L+) - Body ground	Ignition switch on	Below 1 V

Check for open in the circuit.

Turn the ignition switch off.
Disconnect the negative (-) terminal cable from the battery and wait for at least 90 seconds.

Measure the resistance.

Fig 2: Checking Floor Wire (Driver Side Front Pretensioner Squib Circuit)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
J21-1 (L-)-J21-2 (L+)	Always	Below 1 Ω

Check for short to ground in the circuit.

Measure the resistance.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
J21-1 (L-) - Body ground	Always	1 MΩ or higher
J21-2 (L+) - Body ground	Always	1 MΩ or higher

Check for short in the circuit.

Release the activation prevention mechanism built into connector B (See DIAGNOSIS SYSTEM ).

Measure the resistance.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
J21-1 (L-)-J21-2 (L+)	Always	1 MΩ or higher

NG: REPAIR OR REPLACE FLOOR WIRE

OK: GO TO NEXT STEP

CHECK CENTER AIRBAG SENSOR ASSEMBLY
1. Connect the connectors to the front seat outer belt assembly LH and 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 and wait for at least 60 seconds.
4. Clear the DTCs stored in the memory (See DTC CHECK / CLEAR ).
5. Turn the ignition switch off.
6. Turn the ignition switch on and wait for at least 60 seconds.
7. Check the DTCs (See DTC CHECK / CLEAR ).
  OK: DTC B1900, B1901, B1902, B1903 and 73 are not output.
  
  HINT:
  
  DTCs other than DTC B1900, B1901, B1902, B1903 and 73 may be output at this time, but they are not related to this check.
  
  Fig 3: Checking Center Airbag Sensor Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE CENTER AIRBAG SENSOR ASSEMBLY

OK: USE SIMULATION METHOD TO CHECK