Description
Dtc b1787 is output when the occupant classification ecu receives a collision detection signal sent by the rear occupant classification sensor lh when an accident occurs.
Dtc b1787 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 b1787 can be cleared by performing the zero point calibration and sensitivity check.
Therefore, when dtc b1787 is output, first perform the zero point calibration and sensitivity check.

Wiring diagram

Inspection procedure
Ok: completed is displayed.

Standard value: 27 to 33 kg (59.52 To 72.75 Lb)


Hint
First clear dtcs stored in the occupant classification ecu and then in the center airbag sensor.
Ok: dtc b1787 is not output.
Hint:
Dtcs other than dtc b1787 may be output at this time, but they are not related to this check.

Hint:
Perform the inspection using parts from a normal vehicle if possible.
Ok: completed is displayed.

Standard value: 27 to 33 kg (59.52 To 72.75 Lb)

Hint:
First clear dtcs stored in the occupant classification ecu and then in the center airbag sensor.
Ok: dtc b1787 is not output.
Hint:
Dtcs other than dtc b1787 may be output at this time, but they are not related to this check.


Ok: completed is displayed.
Standard value: 27 to 33 kg (59.52 To 72.75 Lb)

End
Front occupant classification sensor rh collision detection
Rear occupant classification sensor rh collision detectionHow to proceed with troubleshooting
Hint:
Use these procedures to troubleshoot the seat belt
warning system.
*: Use the intelligent tester.
Vehicle brought to workshop
Inspect battery voltage
Standard voltage:
11 to 14 v
If the voltage is below 11 v, recharge or replace the battery
before proceeding.
...
Summary of the blind spot monitor
The blind spot monitor is a system that has 2 functions;
The blind spot monitor function
Assists the driver in making the decision when changing lanes
The rear cross traffic alert function
Assists the driver when backing up
These functions use same sensors.
Bsm main switch
...
Engine coolant temperature circuit
Description
A thermistor, whose resistance value varies according to the ect, is built
into the engine coolant
temperature (ect) sensor.
The structure of the sensor and its connection to the ecm are the same as those
of the intake air
temperature (iat) sensor.
Hint:
When any of dtcs ...