DTC B1850/62: Short in Rear Side Squib RH Circuit; DTC B1851/62: Open in Rear Side Squib RH Circuit; DTC B1852/62: Short to GND in Rear Side Squib RH Circuit; DTC B1853/62: Short to B+ in Rear Side Squib RH Circuit [08/2013 - ]: Procedure

1. Turn the power switch off.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

3. Check that the connectors are properly connected to the rear seat airbag assembly RH and airbag sensor assembly.

   OK

   The connectors are properly connected.

   HINT: 

   If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

4. Disconnect the connectors from the rear seat airbag assembly RH and airbag sensor assembly.
5. Check that the terminals of the connectors are not damaged.

   OK

   The terminals are not deformed or damaged.

6. Check that the short spring for the No. 2 floor wire with the activation prevention mechanism is not deformed or damaged.

   OK

   The short spring is not deformed or damaged.

   TEXT IN ILLUSTRATION
   
   

   *1	Rear Seat Airbag Assembly RH
   *2	Airbag Sensor Assembly
   *3	No. 2 Floor Wire

NG → REPLACE NO. 2 FLOOR WIRE 

OK: Go to next step 

1. Connect the connector to the airbag sensor assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Connect SST (resistance 2.1 Ω) to connector C.
   WARNING:

   Never connect the tester to the rear seat airbag assembly RH (rear side squib RH) 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 it.
   • Insert SST straight into the terminals of the connector.
   • SST: 09843-18061 
3. Connect the cable to the negative (-) auxiliary battery terminal.
4. Clear the DTCs stored in memory. Refer to DTC CHECK / CLEAR [08/2013 - ] .
5. Turn the power switch off.
6. Turn the power switch on (IG), and wait for at least 60 seconds.
7. Check for DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .

   OK

   DTC B1850/62, B1851/62, B1852/62 or B1853/62 is not output.

   HINT: 

   Codes other than DTCs B1850/62, B1851/62, B1852/62 and B1853/62 may be output at this time, but they are not related to this check.

8. Turn the power switch off.
9. Disconnect the cable from the negative (-) auxiliary battery terminal.
   WARNING:

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

10. Disconnect SST from connector C.
    TEXT IN ILLUSTRATION
    
    

    *1	Rear Seat Airbag Assembly RH
    *2	Airbag Sensor Assembly
    *a	Front view of wire harness connector (to Rear Seat Airbag Assembly RH)

NG → See step   3 

OK → See step   7 

1. Disconnect the No. 2 floor wire from the airbag sensor assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Check for a short to B+ in the circuit.
   1. Connect the cable to the negative (-) auxiliary battery terminal.
   2. Turn the power switch on (IG).
   3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection	Condition	Specified Condition
      Qz2-2 (SRR+) - Body ground	Power switch on (IG)	Below 1 V
      Qz2-1 (SRR-) - Body ground	Power switch on (IG)	Below 1 V

   4. Turn the power switch off.
   5. Disconnect the cable from the negative (-) auxiliary battery terminal.
      WARNING:

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

3. Check for an open in the circuit.
   1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      Qz2-2 (SRR+) - Qz2-1 (SRR-)	Always	Below 1 Ω

4. Check for a short to ground in the circuit.
   1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      Qz2-2 (SRR+) - Body ground	Always	1 MΩ or higher
      Qz2-1 (SRR-) - Body ground	Always	1 MΩ or higher

5. Check for a short in the circuit.
   1. Release the activation prevention mechanism built into connector B. Refer to DIAGNOSIS SYSTEM [08/2013 - ] .
   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      Qz2-2 (SRR+) - Qz2-1 (SRR-)	Always	1 MΩ or higher

   3. Restore the released activation prevention mechanism of connector B to the original condition.
      TEXT IN ILLUSTRATION
      
      

      *1	Rear Seat Airbag Assembly RH
      *2	Airbag Sensor Assembly
      *3	No. 2 Floor Wire
      *a	Front view of wire harness connector (to Rear Seat Airbag Assembly RH)

NG → REPLACE NO. 2 FLOOR WIRE 

OK: Go to next step 

1. Connect the connectors to the rear seat airbag assembly RH and airbag sensor assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Connect the cable to the negative (-) auxiliary battery terminal.
3. Clear the DTCs stored in memory. Refer to DTC CHECK / CLEAR [08/2013 - ] .
4. Turn the power switch off.
5. Turn the power switch on (IG), and wait for at least 60 seconds.
6. Check for DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .

   OK

   DTC B1850/62, B1851/62, B1852/62 or B1853/62 is not output.

   HINT: 

   Codes other than DTCs B1850/62, B1851/62, B1852/62 and B1853/62 may be output at this time, but they are not related to this check.

   TEXT IN ILLUSTRATION
   
   

   *1	Rear Seat Airbag Assembly RH
   *2	Airbag Sensor Assembly

NG → See step   6 

OK → See step   5