DTC B1556: Extension Module Malfunction 2 [11/2018 - 10/2022]: Procedure
WARNING: This page is about a different car, the 2022 Toyota RAV4, 2021 Toyota RAV4, 2020 Toyota RAV4, and 2019 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK DTC
- Clear the DTCs.
Refer to DTC CHECK / CLEAR [11/2018 - 10/2019] , or refer to DTC CHECK / CLEAR [10/2019 - 10/2022]
Body Electrical > Navigation System > Clear DTCs
- Recheck for DTCs and check that no DTCs are output.
Refer to DTC CHECK / CLEAR [11/2018 - 10/2019] , or refer to DTC CHECK / CLEAR [10/2019 - 10/2022]
Body Electrical > Navigation System > Trouble Codes
OK
No DTCs are output.
Result
Proceed to OK NG
Result:
OK
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]
Result:
NG
REPLACE NAVIGATION ECU. Refer to REMOVAL [11/2018 - 10/2019] , or refer to REMOVAL [10/2019 - 10/2022]
- Clear the DTCs.