DTC B15CC-49: Backup Battery Internal Electronic Failure [09/2019 - 04/2020]: Procedure
WARNING: This page is about a different car, the 2020 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK DTC
- Turn the engine switch off.
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG) and wait for 10 seconds or more.
- Turn the Techstream on.
- Clear the DTCs.
Body Electrical > Telematics > Clear DTCs
- Check for DTCs and check that no DTCs are output.
Body Electrical > Telematics > Trouble Codes
Result
Proceed to OK NG
Result:
OK
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]
Result:
NG
See step 2
- CHECK BUB (BACK-UP BATTERY)
- Replace the BUB (Back-Up Battery) with a normal one and check if the same problem occurs again.
Refer to REMOVAL [09/2019 - 04/2020]
NOTE:The BUB (Back-Up Battery) must not be replaced while an ACN call is in progress.
Refer to ACN CALL END [09/2019 - 04/2020]
- Clear the DTCs.
Body Electrical > Telematics > Clear DTCs
- Recheck for DTCs and check that no DTCs are output.
Body Electrical > Telematics > Trouble Codes
OK
No DTCs are output.
Result
Proceed to OK NG
Result:
OK
PERFORM INITIALIZATION. Refer to INITIALIZATION [09/2019 - 04/2020]
Result:
NG
See step 3
- Replace the BUB (Back-Up Battery) with a normal one and check if the same problem occurs again.
- REPLACE DCM (TELEMATICS TRANSCEIVER)
- Replace the DCM (telematics transceiver) with a new one.
Refer to REMOVAL [09/2019 - 04/2020]
NOTE:- The engine switch must be off.
- Do not exchange the DCM (telematics transceiver) with one from another vehicle.
Result
Proceed to NEXT
Result:
NEXT
PERFORM DCM ACTIVATION. Refer to DCM ACTIVATION [09/2019 - 04/2020]
- Replace the DCM (telematics transceiver) with a new one.