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
Removal
1. REMOVE FRONT WHEEL
2. REMOVE REAR WHEEL
3. REMOVE TIRE PRESSURE WARNING VALVE AND TRANSMITTER
(a) Remove the valve core and cap, and release the air
from the tire.
(b) After ensuring that a sufficient amount of air has
been released, remove the nut and washer that are
used to secure ...
Cooling fan relay
On-vehicle inspection
1. Cooling fan relay
(a) Remove the relay from engine room relay block No.
1.
(b) Measure the resistance of the relay.
Standard resistance
If the result is not as specified, replace the cooling
fan relay.
(c) Install the relay to engine room relay block No. ...
Installation
1. Install generator assembly
(a) Install the bracket with the bolt.
Torque: 20 N*m (204 kgf*cm, 15 ft.*lbf)
(b) Install the wire harness clamp stay.
Torque: 8.4 N*m (86 kgf*cm, 74 in.*lbf)
(c) Connect the wire harness clamp.
(d) Install the generator assembly to the cylinder ...