DESCRIPTION
DTC B1785 is stored when the occupant detection ECU receives a collision detection signal sent by the front in weight detection sensor sub-assembly in the case of an accident.
DTC B1785 is also stored when the front seat assembly RH is subjected to a strong impact, even if an actual accident did not occur.
If the vehicle was not in a collision, but the occupant detection ECU receives a collision detection signal and stores DTC B1785, the DTC can be cleared by performing zero point calibration.
Therefore, if DTC B1785 is output, first perform zero point calibration.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
---|---|---|---|
B1785 |
Front Occupant Classification Sensor LH Collision Detection |
Any of the following conditions is met:
|
Front in weight detection sensor sub-assembly (Front seat adjuster assembly RH)* |
Vehicle Condition |
|||
---|---|---|---|
Pattern 1 |
Pattern 2 |
||
Diagnosis Condition |
Ignition switch ON |
○ |
○ |
Malfunction Status |
Front in weight detection sensor sub-assembly sensed large load. |
○ |
- |
Front seat adjuster assembly RH malfunction |
- |
○ |
|
Detection Time |
- |
- |
|
Number of Trips |
1 trip |
1 trip |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
CAUTION / NOTICE / HINT
CAUTION:
When this DTC is stored, repair of the malfunction indicated can only be performed by initializing the occupant detection ECU or replacing the front seat adjuster assembly RH. Do not replace the occupant detection ECU to repair the malfunction indicated by this DTC.
If the occupant detection ECU is replaced, this DTC will not be output but the occupant detection system may not function properly.
NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
Click here
HINT:
When DTC B165A/32 is stored as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1785 is output, perform troubleshooting for this DTC first.
PROCEDURE
1. |
PERFORM ZERO POINT CALIBRATION |
(a) Using the Techstream, perform Zero Point Calibration.
Click here
Body Electrical > Occupant Detection > Utility
Tester Display |
---|
Zero Point Calibration |
OK:
"Zero Point Calibration is complete." is displayed.
NG |
GO TO STEP 5 |
|
2. |
CHECK DTC |
(a) Clear the DTCs stored in the occupant detection ECU.
Click here
Body Electrical > Occupant Detection > Clear DTCs(b) Clear the DTCs stored in the airbag sensor assembly.
Click here
Body Electrical > SRS Airbag > Clear DTCs(c) Turn the ignition switch off.
(d) Turn the ignition switch to ON, and wait for at least 10 seconds.
(e) Check for DTCs.
Click here
Body Electrical > Occupant Detection > Trouble CodesOK:
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.
(f) Turn the ignition switch off.
OK |
END |
|
3. |
REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal.
(c) Replace the front seat adjuster assembly RH.
Click here
(d) Connect the cable to the negative (-) battery terminal.
|
4. |
PERFORM ZERO POINT CALIBRATION |
(a) Using the Techstream, perform Zero Point Calibration.
Click here
Body Electrical > Occupant Detection > Utility
Tester Display |
---|
Zero Point Calibration |
NEXT |
END |
5. |
REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal.
(c) Replace the front seat adjuster assembly RH.
Click here
(d) Connect the cable to the negative (-) battery terminal.
|
6. |
PERFORM ZERO POINT CALIBRATION |
(a) Using the Techstream, perform Zero Point Calibration.
Click here
Body Electrical > Occupant Detection > Utility
Tester Display |
---|
Zero Point Calibration |
NEXT |
END |
Toyota CH-R Service Manual > Rear View Monitor System: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the
table. Check each sy ...
Toyota CH-R Service Manual > Audio And Visual System(for Radio And Display Type): Satellite Radio Broadcast cannot be Selected or After Selecting Broadcast, Broadcast
cannot be Added into Memory
CAUTION / NOTICE / HINT
NOTICE:
Some satellite radio broadcasts require payment. A contract must be made between
a satellite radio company and the user. If the contract expires, it will not be
possible to listen to the broadcast.
PROCEDURE
1.
CHECK SATELLITE RADIO
...