DTC B1786 Front Occupant Classification Sensor RH Collision Detection
DESCRIPTION
DTC B1786 is output when the occupant classification ECU receives a collision detection signal sent by the front occupant classification sensor RH if an accident occurs.
DTC B1786 is also output when the front seat assembly RH is subjected to a strong impact, even if an actual accident does not occur.
However, when the occupant classification ECU outputs a collision detection signal, even if the vehicle is not in a collision, DTC B1786 can be cleared by "Zero point calibration" and "Sensitivity check".
Therefore, if DTC B1786 is output, first perform "Zero point calibration" and "Sensitivity check".
DTC No. |
DTC Detection Condition |
Trouble Area |
B1786 |
|
|
INSPECTION PROCEDURE
1 PERFORM ZERO POINT CALIBRATION
OK: "COMPLETED" is displayed
2 PERFORM SENSITIVITY CHECK
Standard value: 27 to 33 kg (59.52 to 72.75 lb
3 CHECK DTC
OK: DTC B1786 is not output. HINT: Codes other than DTC B1786 may be output at this time, but they are not related to this check.
4 REPLACE FRONT SEAT ASSEMBLY RH
HINT: Perform the inspection using parts from a normal vehicle if possible.
5 PERFORM ZERO POINT CALIBRATION
OK: "COMPLETED" is displayed.
6 PERFORM SENSITIVITY CHECK
Standard value: 27 to 33 kg (59.52 to 72.75 lb)
7 CHECK DTC
HINT: First clear DTCs stored in the occupant classification ECU and then in the center airbag sensor assembly.
OK: DTC B1786 is not output. HINT: Codes other than DTC B1786 may be output at this time, but they are not related to this check.
8 REPLACE OCCUPANT CLASSIFICATION ECU
9 PERFORM ZERO POINT CALIBRATION
OK: "COMPLETED" is displayed.
10 PERFORM SENSITIVITY CHECK
Standard value: 27 to 33 kg (59.52 to 72.75 lb)
END
Adjustment
1. INSPECT SHIFT LEVER POSITION
(a) When shifting from P to R position only with ignition
switch ON and brake pedal, make sure that the
shifting lever moves smoothly and can be
moderately operated.
(b) When starting engine, make sure that the vehicle
moves forward when shifting from N to D p ...
How to proceed with
troubleshooting
HINT:
Use the following procedures to troubleshoot the cruise
control system.
*: Use the intelligent tester.
1 VEHICLE BROUGHT TO WORKSHOP
2 PROBLEM SYMPTOM CONFIRMATION
3 CHECK MULTIPLEX COMMUNICATION SYSTEM*
Refer to HOW TO PROCEED WITH TROUBLESHOOTING.
Check fo ...
Rear head restraints
Safety information
Warning
A missing protective effect due to removed or
not correctly adjusted head restraints can
cause injuries in the head and neck area. There
is a risk of injury.
Before driving, install the removed head
restraints on the occupied seats.
Adjust the head restraint so its ce ...