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Home >> Toyota >> 2013 >> Prius Plug-in >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System (Diagnostic Codes (B1000/31 - B1905/74) & Symptom Tests)) (Plug-In) >> Airbag System >> DTC B1620/21: Side Airbag Sensor RH Circuit Malfunction >> Procedure

DTC B1620/21: Side Airbag Sensor RH Circuit Malfunction: Procedure

  1. CHECK SIDE AIRBAG SENSOR ASSEMBLY RH 
    1. Turn the power switch off.
      Fig 1: Identifying Side Airbag Sensor Assembly Connector
      GTY321367Courtesy 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. Interchange the side airbag sensor assembly RH with LH and connect the connectors.
    4. Connect the cable to the negative (-) auxiliary battery terminal.
    5. Clear the DTCs stored in memory. Refer to DTC CHECK / CLEAR .
    6. Turn the power switch off.
    7. Turn the power switch on (IG), and wait for at least 60 seconds.
    8. Check for DTCs. Refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1620/21 is output. A
      DTC B1625/22 is output. B
      DTCs B1620/21 and B1625/22 are not output. C

      HINT: 

      Codes other than DTCs B1620/21 and B1625/22 may be output at this time, but they are not related to this check.

    9. Turn the power switch off.
    10. 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.

    11. Return the side airbag sensor assembly RH and LH to their original positions and connect the connectors.
      TEXT IN ILLUSTRATION

      *1 Side Airbag Sensor Assembly LH
      *2 Airbag ECU Assembly

    B → See step   3 

    C → See step   2 

    A → See step   4 

  2. USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 
  3. REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH. Refer to  REMOVAL 
  4. REPLACE AIRBAG ECU ASSEMBLY. Refer to  REMOVAL