2021 Toyota Camry DCM Issues and DTC B15A804
Some 2021 Toyota Camry vehicles may experience Data Communication Module (DCM) issues, including Diagnostic Trouble Code (DTC) B15A804, an inoperative Toyota App, or a red SOS LED. A firmware update is available to address these problems.
También aplica a
- Toyota Avalon
- 2021
- Toyota Corolla
- 2021
- Toyota RAV4
- 2021
Some 2021 Toyota Camry vehicles may experience various communication and app-related problems due to issues with the Data Communication Module (DCM). These Toyota Camry DCM issues can manifest in several ways, affecting both the vehicle's internal systems and external connectivity features.
Symptoms
Owners of affected vehicles may observe one or more of the following conditions:
- A Diagnostic Trouble Code (DTC) B15A804 is present in current or history.
- The red SOS LED stays on after the bulb check, indicating a potential issue with the emergency call system.
- The Toyota App does not accept the activation code, preventing setup or use.
- The Toyota App is inoperative, failing to function correctly.
- The SOS call center does not receive the vehicle’s location in a timely manner during an emergency.
- The Toyota App shows an error 42 when attempting to execute a command.
- The vehicle is unable to remote start with the key fob, if equipped.
- Owners are unable to subscribe to remote services.
- It is impossible to activate Wi-Fi services within the vehicle.
- Destination Assist is inoperative, failing to provide navigation support.
- A depleted 12V vehicle battery when the ignition is off (IG-OFF) may also occur.
Fault Codes / DTCs
The primary diagnostic trouble code associated with these Toyota Camry DCM issues is:
| Code | Description |
|---|---|
| B15A804 | (No specific description provided in the bulletin, indicates a DCM fault) |
This DTC points to a problem within the Data Communication Module, which is central to many of the vehicle's connected features.
Repair Procedure Summary
Toyota has identified that a DCM reset and firmware update can resolve these conditions. The repair involves updating the software within the Data Communication Module to correct the underlying issues.
The service bulletin provides a detailed
Frequently Asked Questions
- What does DTC B15A804 mean for my Toyota Camry?
- DTC B15A804 indicates a fault within the Data Communication Module (DCM) of your 2021 Toyota Camry. This can lead to various connectivity problems, including issues with the Toyota App and SOS services.
- My Toyota App isn't working. Is this related to the DCM issue?
- Yes, an inoperative Toyota App or issues with activation and remote commands (like showing 'error 42') are common symptoms of the `Toyota Camry DCM issues` described in TSB 10186193. A DCM firmware update is available to fix this.
- How can I fix the red SOS LED staying on in my 2021 Toyota Camry?
- If the red SOS LED remains illuminated after the bulb check, it's likely due to the DCM firmware issue. Your Toyota dealer can perform a DCM reset and firmware update to resolve this and restore proper functionality to the emergency call system.
- Will a DCM firmware update fix my 12V battery drain issue?
- Yes, a depleted 12V vehicle battery when the ignition is off is listed as one of the potential symptoms related to the DCM firmware issue. The DCM reset and firmware update procedure outlined in TSB 10186193 is intended to address this as well.
Otras revisiones de este TSB
- 2021-2022 Toyota Connectivity Issues TSBB15A804
- 2021-2022 Toyota Communication System Fault TSBB15A804
- 2021-2022 Toyota Camry, RAV4, Corolla SOS System TSBB15A804
- 2021 Toyota Connectivity Issues TSBB15A804
- 2021 Toyota Camry B15A804 DTC and DCM UpdateB15A804
- 2021 Toyota Camry DCM Issues and DTC B15A804B15A804
- 2021 Toyota Camry DCM Faults and Connectivity IssuesB15A804
What Toyota Camry owners report
Counted from the records in our database across 44 model years.
- 19,642
- Owner complaints
- 74
- Recalls
- 1,998
- Service bulletins
- 2,952
- Crashes reported
- 433
- Fires reported
- 2,097
- Injuries reported
The 2021 model year
166 complaints, the 30th most of 44 model years on file. Owners reported 21 crashes, 2 fires and 16 injuries for this year, which also has 1 recall on file.
Electrical System and Equipment, the system this article covers, accounts for 1,719 of 19,642 complaints (9%), including 8 for 2021.
Complaints by model year
| 2002 | 953 | |
|---|---|---|
| 2003 | 782 | |
| 2004 | 638 | |
| 2005 | 721 | |
| 2007 | 3,490 | |
| 2008 | 1,095 | |
| 2009 | 1,412 | |
| 2012 | 645 | |
| 2018 | 782 | |
| 2021 | 166 |
Most-reported systems
- Vehicle Speed Control — 3,431
- Service Brakes — 2,805
- Structure — 1,910
- Power Train — 1,796
- Air Bags — 1,712
Latest recalls for the 2021 model year
- 23V865000 — Air Bags (Dec 2023)
Recent owner reports about electrical system and equipment
Driving very slowly into my 36 foot deep garage I took my right foot off the accelerator pedal when the 2021 Toyota Camry suddenly unintended accelerated forward 15 feet and crashed through the rear garage wall, the automatic brake didn't work,.
Read owner complaints →The driver side rear door would not open from the inside or outside. Once the dealership opened the back door, the vehicle would no longer lock at all. There was nothing to indicate this would be a problem.
Complaints are owner reports filed with NHTSA. They are unverified, and counts depend on how many vehicles were sold, so they are not a failure rate.
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