| Last Modified: 11-20-2023 | 6.11:8.1.0 | Doc ID: RM1000000015ZG9 |
| Model Year Start: 2018 | Model: Camry | Prod Date Range: [06/2017 - ] |
| Title: SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1798,B1799; Yaw Rate Sensor Module Malfunction; 2018 - 2024 MY Camry [06/2017 - ] | ||
|
DTC |
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 |
|
|
B1799 |
Vehicle Stability Control ECU Malfunction |
Vehicle speed signal from skid control ECU is abnormal |
|
CAUTION / NOTICE / HINT
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
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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 (VEHICLE STABILITY CONTROL SYSTEM) |
(a) Check for vehicle stability control system DTCs.
w/ Electric Parking Brake System: Click here
w/o Electric Parking Brake System: Click here
OK:
DTCs are not output.
| NG |
|
GO TO VEHICLE STABILITY CONTROL SYSTEM w/ Electric Parking Brake System: Click here
w/o Electric Parking Brake System: Click here
|
|
|
2. |
CHECK CAN COMMUNICATION SYSTEM |
(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
| NG |
|
|
|
3. |
CHECK DTC (HEALTH CHECK) |
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON and turn the Techstream on.
(d) Enter the following menus: System Select / Health Check.
OK:
DTCs are not output.
| OK |
|
USE SIMULATION METHOD TO CHECK
|
| NG |
|
GO TO OTHER DIAGNOSTIC TROUBLE CODE CHART |
|
|