DESCRIPTION
The occupant detection ECU receives signals from the acceleration sensor (airbag sensor assembly*1 or yaw rate sensor assembly*2) and skid control ECU 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 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.
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HINT:
PROCEDURE
1. | CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM) |
(a) Check for vehicle stability control system DTCs.
Click here
OK:
DTCs are not output.
NG | ![]() | GO TO VEHICLE STABILITY CONTROL SYSTEM |
|
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 CAN Bus Check in CAN Communication System.
Click here
NG | ![]() | GO TO CAN COMMUNICATION SYSTEM |
|
3. | CHECK DTC (HEALTH CHECK) |
(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.
OK | ![]() | USE SIMULATION METHOD TO CHECK |
NG | ![]() | GO TO OTHER DIAGNOSTIC TROUBLE CODE CHART |
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