DTC B1793-12: Load Sensor for Occupant Detection System Circuit Short to Battery [07/2020 - ]: Procedure

1. Turn the ignition switch off.
2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
3. Check that the connectors are properly connected to the airbag sensor assembly and front seat adjuster assembly RH.

   Result

   Proceed to
   Connectors are properly connected
   Connectors are not properly connected

Result: 

Connectors are not properly connected 

CONNECT CONNECTORS PROPERLY 

Result: 

Connectors are properly connected 

See step  2

1. Disconnect the airbag sensor assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Front Seat Adjuster Assembly RH
   *2	Airbag Sensor Assembly
   *3	Wire Harness

2. Disconnect the front seat adjuster assembly RH connector.
3. Check that the connectors (on the airbag sensor assembly side and front seat adjuster assembly RH side) are not damaged.

   Result

   Proceed to
   Connectors are not deformed or damaged
   Connectors are deformed or damaged

Result: 

Connectors are deformed or damaged 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

Connectors are not deformed or damaged 

See step  3

1. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Front Seat Adjuster Assembly RH
   *2	Airbag Sensor Assembly
   *3	Wire Harness
   *a	Front view of wire harness connector (to Airbag Sensor Assembly)
   *b	Front view of wire harness connector (to Front Seat Adjuster Assembly RH (Front Occupant Classification Sensor LH))
   *c	Front view of wire harness connector (to Front Seat Adjuster Assembly RH (Rear Occupant Classification Sensor LH))

2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   K52-24 (SVC) - Body ground	Ignition switch ON	Below 1 V
   U12-1 (SVC) - Body ground	Ignition switch ON	Below 1 V
   U13-1 (SVC) - Body ground	Ignition switch ON	Below 1 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [07/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR