MG

Moderator
THIS TSB IS NOW OBSOLETE. PLEASE SEE T-SB-0089-21



Please Read T-SB-0095-20 Revision 2

**In our opinion, this LG Firmware update was released in an effort to fix the DCM from staying active and pinging, this was causing quite a few no start (had to jump start) conditions in 2020-2021 Toyota vehicles. There was a parasitic draw on these Toyota Models that would go away when the DCM fuse was pulled.

Applicability:
2021 Avalon, Avalon HV, Corolla, Corolla HV, Sienna HV, Venza Hybrid
2020 - 2021 Camry, Camry HV, Corolla Hatchback, RAV4, RAV4 Hybrid

REVISION NOTICE:
December 14, 2020 Revision 1:
Applicability has been updated to include 2021 model year Venza Hybrid, Avalon, Avalon Hybrid, and Sienna Hybrid vehicles.
Applicability has been updated to exclude 2021 model year RAV4 Prime vehicles.
The Introduction section has been updated. Any previous printed versions of this bulletin should be discarded.

SUPERSESSION NOTICE:
The information contained in this bulletin supersedes Service Bulletin No. T-SB-0021-20.

Applicability has been updated to include 2021 model year Camry, Camry Hybrid, Corolla, Corolla Hatchback, Corolla Hybrid, RAV4, RAV4 Hybrid, and RAV4 Prime vehicles.

The Introduction and Firmware Update Procedure sections have been modified. Service Bulletin No. T-SB-0021-20 is obsolete and any printed versions should be discarded.

Introduction:
Some 2020 model year Camry, Camry Hybrid, Corolla Hatchback, RAV4, and RAV4 Hybrid vehicles may exhibit one or more of the following conditions:
1) Diagnostic Trouble Code (DTC) B15A804 is present in current or history.
2) Red SOS LED stays on after bulb check.
3) Toyota App does not accept the activation code.
4) Toyota App is inoperative.
5) SOS call center does not receive the vehicle’s location in a timely manner.
6) Toyota App shows an error 42 when trying to execute a command.
7) Unable to remote start the vehicle with the key fob (if equipped).
8) Unable to subscribe to remote services.
9) Unable to activate Wi-Fi.
10) Destination Assist is inoperative.

Some 2020 – 2021 model year Camry, Camry Hybrid, Corolla Hatchback, RAV4, and RAV4 Hybrid vehicles and some 2021 model year Corolla, Corolla Hybrid, and RAV4 Prime vehicles may exhibit one or more of the following conditions:
1) DTC B15A804 is present in current or history.
2) Red SOS LED stays on after bulb check.
3) Toyota App is inoperative.
4) Unable to subscribe to remote services.
5) Unable to activate Wi-Fi.
6) Depleted 12V vehicle battery when in IG-OFF.

A DCM reset and firmware update is now available to address these conditions. Follow the DCM Reset and Firmware Update Procedure in this bulletin to update the firmware.

APPLICABLE WARRANTY:
This repair is covered under the Toyota Basic Warranty. This warranty is in effect for 36 months or 36,000 miles, whichever occurs first, from the vehicle’s in-service date.
Warranty application is limited to occurrence of the specified condition described in this bulletin.

DCM Reset and Firmware Update Procedure:

1. Move the vehicle to an area with good DCM (Data Communication Module) signal reception.
2. Using Techstream, perform a Health Check and clear ALL DTCs.
A. Check the “Perform Health Check on all ECUs” box.
B. Check the “Store only DTC and FFD” box.
C. Click on Next.

3. Verify the current firmware version. Refer to TIS – Body Electrical – Telematics – Data List

Is the firmware version up-to-date?
YES — This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
NO — Continue to step 4.

4. Disconnect the battery to reset the DCM.

5. Reconnect the battery AFTER it has been disconnected for AT LEAST 30 minutes.

6. Cycle the ignition to the IG-ON position IMMEDIATELY.

7. Verify the SOS LED indicator status. Has the SOS LED indicator been on solid green for more than five seconds?
YES — Continue to step 8.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.

8. Perform the DCM firmware update utility. Refer to TIS – Body Electrical – Telematics – Utility

9. Click on Next when the DCM firmware update screen appears.

10. Select “Start the firmware update” and click on Next when the item selection screen appears.

11. Click on Next when the current software part number screen appears.

NOTE:
If the screen in Figure 5 does NOT appear and an error message displays, begin the Firmware Update Procedure again from step 4. The battery reset MUST be performed again.

Use the battery diagnostic tool to maintain battery voltage

NOTE:
The battery diagnostic tool MUST be used in Power Supply Mode to maintain battery voltage at 13.5V while flash reprogramming the vehicle.
For details on how to use the battery diagnostic station, refer to the DCA-8000 Instruction Manual located at TIS – Diagnostics – Tools & Equipment – Battery Diagnostics.

12. The firmware update will begin. Do NOT turn the vehicle OFF during this time

NOTE:
Do NOT press Exit until the update process has completed.
During the update process the green and red LEDs will both be ON, and will reset several times resulting in the LEDs being temporarily OFF during the process. The download process will take about 5 – 10 minutes.

13. The green LED will be ON when the update process has completed. AFTER the process has completed, wait for the radio screen to display the service mode screen BEFORE you click OK to exit.

14. Verify the current firmware version. Refer to TIS – Body Electrical – Telematics – Data List:
SOFTWARE VERSION HIGH: LG-N010gg7
SOFTWARE VERSION LOW: G7G-05/G7G-c7

15. Using Techstream, perform a Health Check and clear ALL DTCs that may have occurred during the update process.

16. In the customer’s Toyota app, perform steps 17 – 19 for customers with the “Unable to Activate Remote” message.

17. Click on the arrow by the vehicle name/nickname

18. Click on REMOVE

19. Click on Add Vehicle to perform the enrollment again.
 
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