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2021 Toyota Camry DCM Faults and Connectivity Issues

Toyota has released a Technical Service Bulletin (TSB 10181782) addressing various connectivity problems and Diagnostic Trouble Code (DTC) B15A804 in 2021 Camry, RAV4, and Corolla vehicles. A Digital Communication Module (DCM) reset and firmware update is available to fix these issues.

Byeditor sarah mitchell2021 Toyota Camry
2021 TOYOTA Camry — 2021 TOYOTA Camry manufacturer_communication
Editorial illustration generated for this article.
B15A80410181782DCM reset firmware updateToyota Camry DCM B15A804Toyota App inoperativeRed SOS LED stays onUnable to activate Wi-Fi ToyotaDepleted 12V vehicle battery ToyotaToyota remote services not workingEQUIPMENT ADAPTIVE/MOBILITY

S'applique également à

Toyota Corolla
2021
Toyota RAV4
2021

Toyota has issued Technical Service Bulletin (TSB) 10181782 to address various connectivity problems and the diagnostic trouble code Toyota Camry DCM B15A804 in certain 2021 Camry, RAV4, and Corolla vehicles. These issues stem from the Digital Communication Module (DCM) and can impact several in-vehicle services and features.

Symptoms

Owners of affected 2021 Toyota Camry, RAV4, and Corolla vehicles may observe one or more of the following conditions related to the DCM:

  • "Diagnostic Trouble Code (DTC) B15A804 is present in current or history."
  • "Red SOS LED stays on after bulb check."
  • "Toyota App is inoperative."
  • "Unable to subscribe to remote services."
  • "Unable to activate Wi-Fi."
  • "Depleted 12V vehicle battery when in IG-OFF."

Fault Codes / DTCs

The primary diagnostic trouble code associated with these DCM-related issues is:

Code Description
B15A804 DCM Malfunction

Repair Procedure Summary

Toyota has developed a solution involving a Digital Communication Module (DDCM) reset and firmware update. This procedure is designed to resolve the underlying software issues causing the connectivity problems and the Toyota Camry DCM B15A804 fault code. Technicians will follow a specific DCM Reset and Firmware Update Procedure outlined in the bulletin to apply the necessary software corrections.

Owner Action

If your 2021 Toyota Camry, RAV4, or Corolla exhibits any of the described symptoms or has the Toyota Camry DCM B15A804 code, it is recommended to schedule an appointment with an authorized Toyota dealership. The DCM reset and firmware update will be performed by qualified technicians. As this is a Technical Service Bulletin addressing a known manufacturing condition, the repair is typically covered under the vehicle's warranty.

Source: NHTSA ID: 10181782

Frequently Asked Questions

What does DTC B15A804 mean for my Toyota?
DTC B15A804 indicates a malfunction within the Digital Communication Module (DCM) in your Toyota. This module is responsible for various connectivity features in your vehicle.
What are the common symptoms of a DCM issue in 2021 Toyota Camry vehicles?
Common symptoms include the red SOS LED staying on, the Toyota App being inoperative, inability to subscribe to remote services or activate Wi-Fi, and in some cases, a depleted 12V vehicle battery when the ignition is off.
How is the Digital Communication Module (DCM) issue resolved?
The issue is resolved by performing a DCM reset and updating the firmware of the module. This procedure is carried out by a Toyota dealership technician following a specific service bulletin.
Will I have to pay for the DCM firmware update?
Typically, repairs covered by a Technical Service Bulletin (TSB) addressing a manufacturing condition, such as this DCM firmware update, are performed free of charge under the vehicle's warranty.

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