2021-2023 Toyota DCM Activation Firmware Update TSB

Toyota has issued Technical Service Bulletin (TSB) 10230371 to address a specific concern affecting the Data Communication Module (DCM) in certain 2021-2023 Toyota vehicles. This TSB provides guidance for situations where the DCM firmware update cannot be completed, often due to issues with the vehicle's active account status or trial services. This can impact the proper functioning of the Toyota DCM activation process.

Symptoms

Owners of affected vehicles may notice that their vehicle's DCM is unable to complete necessary firmware updates. This can manifest as a failure to update the system or an inability to access certain connected services that rely on the DCM's software. The core problem is that the system prevents proper Toyota DCM activation for updates.

Diagnosis / Trigger Conditions

The primary trigger for this issue is the status of the vehicle's connected services account. The firmware update process may fail if the vehicle does not have an active account or if the associated services were waived during the trial period. This condition prevents the 19CY LG DCM from receiving crucial updates.

Repair Procedure Summary

To resolve the firmware update issue, technicians are instructed to follow a specific procedure outlined in the TSB to enable "Temp DCM Activation." This temporary activation allows the DCM to bypass the account status check and proceed with the firmware update. The TSB details the precise steps required to perform this action, ensuring the 19CY LG DCM receives its necessary software updates.

Owner Action

If you own a 2021-2023 Toyota Camry, Corolla, Avalon, RAV4, or Venza and suspect your vehicle's DCM firmware has not been updated, or if you experience issues with connected services, it is recommended to visit your authorized Toyota dealership. They will be able to diagnose the issue and apply the "Temp DCM Activation" procedure as described in TSB 10230371, ensuring your Toyota DCM activation is correctly handled. This service is typically covered under warranty if your vehicle is within the applicable period.

NHTSA ID: 10230371