DTC B1785: Front Occupant Classification Sensor LH Collision Detection (FROM 12/2010): Procedure

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM ZERO POINT CALIBRATION
1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Using the Techstream, perform "Zero point calibration". Refer to INITIALIZATION .
  OK
  
  The "Zero Point Calibration is complete." is displayed.
NG → See step 4

OK: Go to next step
PERFORM SENSITIVITY CHECK
1. Using the Techstream, perform "Sensitivity check". Refer to INITIALIZATION .
  Standard value
  
  27 to 33 kg (59.52 to 72.75 lb)
NG → See step 4

OK: Go to next step
CHECK DTC
1. Turn the ignition switch on (IG).
2. Clear the DTCs stored in the occupant classification ECU. Refer to DTC CHECK / CLEAR .
3. Clear the DTCs stored in the center airbag sensor assembly. Refer to DTC CHECK / CLEAR .
4. Turn the ignition switch off.
5. Turn the ignition switch on (IG).
6. Check the DTCs. Refer to DTC CHECK / CLEAR .
  OK
  
  DTC B1785 is not output.
  
  HINT:
  
  Codes other than DTC B1785 may be output at this time, but they are not related to this check.
OK → END

NG: Go to next step
REPLACE FRONT SEAT ASSEMBLY RH
1. Turn the ignition switch off.
2. Disconnect the negative (-) terminal cable from the battery.
3. Replace the front seat assembly RH. Refer to REMOVAL for power seat or. Refer to REMOVAL for manual seat).
  HINT:
  
  Perform the inspection using parts from a normal vehicle if possible.
NEXT: Go to next step
PERFORM ZERO POINT CALIBRATION
1. Connect the negative (-) terminal cable to the battery.
2. Connect the Techstream to the DLC3.
3. Turn the ignition switch on (IG).
4. Using the Techstream, perform "Zero point calibration". Refer to INITIALIZATION .
  OK
  
  The "Zero Point Calibration is complete." is displayed.
NG → See step 8

OK: Go to next step
PERFORM SENSITIVITY CHECK
1. Using the Techstream, perform "Sensitivity check". Refer to INITIALIZATION .
  Standard value
  
  27 to 33 kg (59.52 to 72.75 lb)
NG → See step 8

OK: Go to next step
CHECK DTC
1. Turn the ignition switch on (IG).
2. Clear the DTCs stored in the occupant classification ECU. Refer to DTC CHECK / CLEAR .
3. Clear the DTCs stored in the center airbag sensor assembly. Refer to DTC CHECK / CLEAR .
4. Turn the ignition switch off.
5. Turn the ignition switch on (IG).
6. Check the DTCs. Refer to DTC CHECK / CLEAR .
  OK
  
  DTC B1785 is not output.
  
  HINT:
  
  Codes other than DTC B1785 may be output at this time, but they are not related to this check.
OK → END

NG: Go to next step
REPLACE OCCUPANT CLASSIFICATION ECU
1. Turn the ignition switch off.
2. Disconnect the negative (-) terminal cable from the battery.
3. Replace the occupant classification ECU. Refer to REMOVAL .
NEXT: Go to next step
PERFORM ZERO POINT CALIBRATION
1. Connect the negative (-) terminal cable to the battery.
2. Connect the Techstream to the DLC3.
3. Turn the ignition switch on (IG).
4. Using the Techstream, perform "Zero point calibration". Refer to INITIALIZATION .
  OK
  
  The "Zero Point Calibration is complete." is displayed.
NEXT: Go to next step
PERFORM SENSITIVITY CHECK
1. Using the Techstream, perform "Sensitivity check". Refer to INITIALIZATION .
  Standard value
  
  27 to 33 kg (59.52 to 72.75 lb)
NEXT → END