Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001BW32 |
Model Year Start: 2019 |
Model: GR Corolla |
Prod Date Range: [06/2018 - 01/2019] |
Title: SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM (for Gasoline Model): B1798,B1799; Yaw Rate Sensor Module Malfunction; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019] |
DTC
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B1798
|
Yaw Rate Sensor Module Malfunction
|
DTC
|
B1799
|
Vehicle Stability Control ECU Malfunction
|
DESCRIPTION
The occupant detection ECU receives signals from the acceleration sensor (airbag sensor assembly) and skid control ECU (brake actuator assembly) via CAN communication.
DTC No.
|
Detection Item
|
DTC Detection Condition
|
Trouble Area
|
B1798
|
Yaw Rate Sensor Module Malfunction
|
Acceleration signals are abnormal
|
-
Acceleration sensor (Airbag sensor assembly)
-
CAN communication system
-
Occupant detection ECU
|
B1799
|
Vehicle Stability Control ECU Malfunction
|
Vehicle speed signal from skid control ECU is abnormal
|
-
Skid control ECU (Brake actuator assembly)
-
CAN communication system
-
Occupant detection ECU
|
CAUTION / NOTICE / HINT
NOTICE:
After turning the engine 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 B1650 is stored as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1798 or B1799 is output, perform troubleshooting for this DTC first.
-
If it is difficult to perform troubleshooting (wire harness inspection), remove the front passenger seat installation bolts to see under the seat cushion.
-
In the above case, lift and hold the seat so that it does not fall down. Hold the seat only as necessary because holding the seat for a long period of time may cause seat rail deformation.
PROCEDURE
1.
|
CHECK DTC (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)
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(a) Check for electronically controlled brake system DTCs.
Click here
OK:
DTCs are not output.
OK
|
|
|
2.
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CHECK CAN COMMUNICATION SYSTEM
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(a) Using the Techstream, check if the CAN communication system is functioning normally.
OK:
CAN communication system is functioning normally.
HINT:
Refer to Communication Bus Check in CAN Communication System.
Click here
OK
|
|
|
3.
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CHECK DTC (HEALTH CHECK)
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(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG) and turn the Techstream on.
(d) Enter the following menus: System Select / Health Check.
OK:
DTCs are not output.
NG |
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GO TO OTHER DIAGNOSTIC TROUBLE CODE CHART
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