DTC B1620/21: Side Airbag Sensor RH Circuit Malfunction; DTC B1622/81: Lost communication with Side Airbag Sensor RH: Procedure

Fig 1: Checking Side Airbag Sensor RH (For Rear Side) - Side Airbag Sensor LH (For Rear Side) Circuit

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the ignition switch off.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Interchange the side airbag sensor RH (for rear side) with side airbag sensor LH (for rear side) and connect the connectors to them.
4. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
5. Turn the ignition switch to ON, and wait for at least 60 seconds.
6. Clear the DTCs stored in the memory. Refer to DTC CHECK / CLEAR .
7. Turn the ignition switch off.
8. Turn the ignition switch to ON, and wait for at least 60 seconds.
9. Check for DTCs. Refer to DTC CHECK / CLEAR .
   RESULT
   
   

   Result	Proceed to
   DTC B1620/21, B1622/81, B1625/22 and B1627/82 are not output	A
   DTC B1625/22 or B1627/82 is output	B
   DTC B1620/21 or B1622/81 is output	C

   TEXT IN ILLUSTRATION
   
   

   *1	Side Airbag Sensor LH (for Rear Side)
   *2	Side Airbag Sensor RH (for Front Side)

   HINT: 

   DTCs other than B1620/21, B1622/81, B1625/22 and B1627/82 may be output at this time, but they are not related to this check.

10. Turn the ignition switch off.
11. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
12. Return the side airbag sensor RH (for rear side) and side airbag sensor LH (for rear side) to their original positions and connect the connectors to them.

A → See step   4 

B → See step   3 

C → See step   2