DTC B1785: Front Occupant Classification Sensor LH Collision Detection: Procedure

1. Turn the ignition switch ON, and wait for at least 60 seconds.
2. Clear any DTCs stored in the center airbag sensor. Refer to DTC CHECK / CLEAR .
3. Turn the ignition switch off.
4. Turn the ignition switch ON, and wait for at least 60 seconds.
5. Using a Techstream, check for DTCs of the occupant classification ECU. Refer to DTC CHECK / CLEAR .

   OK

   DTC B1785 is not output.

   HINT: 

   DTCs other than DTC B1785 may be output at this time, but they are not related to this check.

NG → See step   2 

OK → See step   12 

1. Connect a Techstream to the DLC3.
2. Turn the ignition switch ON, and wait for at least 60 seconds.
3. Using the Techstream, perform the zero point calibration. Refer to INITIALIZATION .

NG → See step   5 

OK: Go to next step 

1. Using a Techstream, perform the sensitivity check. Refer to INITIALIZATION .

   Standard range

   27 to 33 kg (59.5 to 72.8 lb)

NG → See step   5 

OK: Go to next step 

1. Turn the ignition switch ON, and wait for at least 60 seconds.
2. Clear any DTCs stored in the center airbag sensor. Refer to DTC CHECK / CLEAR .
3. Turn the ignition switch off.
4. Turn the ignition switch ON, and wait for at least 60 seconds.
5. Using a Techstream, check for DTCs of the occupant classification ECU. Refer to DTC CHECK / CLEAR .

   OK

   DTC B1785 is not output.

   HINT: 

   DTCs other than DTC B1785 may be output at this time, but they are not related to this check.

NG → See step   5 

OK → END 

1. Turn the ignition switch off.
2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3. Replace the front seat frame with adjuster RH. Refer to DISASSEMBLY .

   HINT: 

   Perform the inspection using parts from a normal vehicle when possible.

NEXT: Go to next step 

1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
2. Connect a Techstream to the DLC3.
3. Turn the ignition switch ON, and wait for at least 60 seconds.
4. Using the Techstream, perform the zero point calibration. Refer to INITIALIZATION .

NG → See step   9 

OK: Go to next step 

1. Using a Techstream, perform the sensitivity check. Refer to INITIALIZATION .

   Standard range

   27 to 33 kg (59.5 to 72.8 lb)

NG → See step   9 

OK: Go to next step 

1. Connect the connectors to the occupant classification ECU and the front occupant classification sensor LH.
2. Turn the ignition switch ON, and wait for at least 60 seconds.
3. Clear any DTCs stored in the memory. Refer to DTC CHECK / CLEAR .

   HINT: 

   • First clear DTCs stored in the occupant classification ECU and then in the center airbag sensor.
   • Use a Techstream to clear the DTCs of the occupant classification ECU, otherwise the DTCs cannot be cleared.
4. Turn the ignition switch off.
5. Turn the ignition switch ON, and wait for at least 60 seconds.
6. Using the Techstream, check for DTCs of the occupant classification ECU. Refer to DTC CHECK / CLEAR .

   OK

   DTC B1785 is not output.

   HINT: 

   DTCs other than DTC B1785 may be output at this time, but they are not related to this check.

NG → See step   9 

OK → END 

1. Turn the ignition switch off.
2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3. Replace the occupant classification ECU. Refer to REMOVAL .

   HINT: 

   Perform the inspection using parts from a normal vehicle when possible.

NEXT: Go to next step 

1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
2. Connect a Techstream to the DLC3.
3. Turn the ignition switch ON, and wait for at least 60 seconds.
4. Using the Techstream, perform the zero point calibration. Refer to INITIALIZATION .

NEXT: Go to next step 

1. Using a Techstream, perform the sensitivity check. Refer to INITIALIZATION .

   Standard range

   27 to 33 kg (59.5 to 72.8 lb)

NEXT → END