DTC B1798: Yaw Rate Sensor Module Malfunction; DTC B1799: Vehicle Stability Control ECU Malfunction [10/2018 - 07/2022]: Procedure

1. Check for electronically controlled brake system DTCs.
   • for HV Model:

     Refer to DTC CHECK / CLEAR [10/2018 - ]

   • for Gasoline Model:

     Refer to DTC CHECK / CLEAR [10/2018 - 07/2022]

   OK

   DTCs are not output.

   Result

   Result	Proceed to
   OK	A
   NG (for HV Model)	B
   NG (for Gasoline Model)	C

Result: 

B 

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ] 

Result: 

C 

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - 07/2022] 

Result: 

A 

See step  2

1. 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.

   • for HV Model:

     Refer to DIAGNOSIS SYSTEM [10/2018 - 10/2019] , or refer to DIAGNOSIS SYSTEM [10/2019 - 08/2021] , or refer to DIAGNOSIS SYSTEM [08/2021 - 07/2022]

   • for Gasoline Model:

     Refer to DIAGNOSIS SYSTEM [10/2018 - 10/2019] , or refer to DIAGNOSIS SYSTEM [10/2019 - 07/2022]

   Result

   Result	Proceed to
   OK	A
   NG (for HV Model)	B
   NG (for Gasoline Model)	C

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ] 

Result: 

C 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - 07/2022] 

Result: 

A 

See step  3

1. Turn the ignition switch off.
2. Connect the Techstream to the DLC3.
3. Turn the ignition switch to ON and turn the Techstream on.
4. Enter the following menus: System Select / Health Check.

   OK

   DTCs are not output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ] 

Result: 

NG 

GO TO OTHER DIAGNOSTIC TROUBLE CODE CHART