U1110 on 2016-2017 Toyota Camry: Entune Radio Rebooting and Communication Fault Guide

What's Unique About the 2016-2017 Toyota CAMRY

For this specific generation of Camry (XV50), the U1110 code is overwhelmingly linked to documented software bugs in the Denso-Ten manufactured Entune audio system, not physical hardware failure. Toyota released multiple Technical Service Bulletins (TSBs) to address these glitches, which cause symptoms like random reboots and non-functional apps. Unlike many other vehicles where a 'U' code might trigger a difficult search for a broken wire, on the Camry, the diagnostic path almost always starts and ends with the radio's software version.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• Radio/infotainment unit reboots intermittently, sometimes in a continuous loop.
• Pandora Internet Radio operates abnormally.
• A diagnostic screen displays intermittently.
• The Weather Map feature is inoperative.
• An 'Unable to connect to server' message appears.
• Screen freezes or becomes unresponsive.
• Bluetooth connectivity issues or failure to reconnect.
• Screen flickers when switching between day and night modes.
• Bluetooth audio information is missing from the instrument cluster display.

Most Likely Causes

1. Outdated Head Unit Software 🔴 High Probability This model year range is explicitly mentioned in Toyota TSBs T-SB-0024-20 and T-SB-0003-19_Rev for having software glitches in the Entune system that cause this code and associated symptoms.
   How to confirm: A Toyota dealership can check the current software version on the head unit and compare it against the updated versions listed in the TSBs. This is the definitive check.
   Typical fix: Perform a software update on the multimedia head unit. This is done by a dealer via a USB flash drive using their Techstream diagnostic tool. If the vehicle is out of the 3-year/36,000-mile basic warranty, dealers will charge for this service.
   Est. part cost: $0
2. Failing Audio Head Unit ⚪ Low Probability → Shop Audio System While less common, an internal failure of the radio's electronics can cause it to stop communicating on the network, triggering the U1110 code. This becomes the primary suspect if a software update fails.
   How to confirm: This is diagnosed by exclusion. If the software update is performed correctly but fails to resolve the issue, or if the unit will not power on at all, the head unit itself is the likely culprit.
   Typical fix: Replacement of the entire multimedia head unit assembly. Used or refurbished units are a cost-effective alternative to a new OEM part.
   Est. part cost: $300-$1500

Rare But Worth Checking

• Aftermarket Remote Starter Interference:

Diagnosis Steps

1. Verify the symptoms. Confirm that the issues are related to the infotainment system (rebooting, freezing, app errors).
2. Attempt a 'soft reset' by pressing and holding the radio's power knob for about 10-15 seconds until it reboots. This can sometimes clear a temporary glitch.
3. Try the 'Delete Personal Data' option. In the head unit's Setup -> General menu, find and use the 'Delete Personal Data' option. This has been known to resolve some software issues but will erase presets and paired phones.
4. Attempt a 'hard reset' by disconnecting the vehicle's 12V battery for at least 15 minutes. Note that this will reset other vehicle settings.
5. If the issue persists, contact a Toyota dealership and reference TSB T-SB-0024-20. Ask them to verify if the software update applies to your vehicle's VIN and head unit model. Be prepared for a diagnostic fee or update charge if out of warranty, typically ranging from $60 to $175.
6. Allow the dealer to perform the software update. This is the most probable solution.
7. If the software update does not fix the problem, the head unit itself has likely failed and requires replacement.
🎬 Watch: Step-by-step guide to removing the Camry head unit.

Parts You'll Likely Need

• Audio Head Unit / Radio Assembly (Non-JBL) (OEM #86140-06390 (Faceplate ID: 100366)) — This part is only needed if the primary fix, a software update, fails. The internal electronics can fail, causing the U1110 code. Part numbers vary significantly by trim level and features. This number is common for 2015-2017 non-JBL units.
  Trusted brands: Toyota (OEM), Various (Used/Refurbished)
  OEM price range: $800-$1500
  Aftermarket price range: $300-$600

Related Codes That Often Appear With This One

• B15E6 — This is another Toyota-specific DTC that is explicitly mentioned alongside U1110 in the manufacturer's TSBs for the same infotainment system faults.

Technical Service Bulletins (TSBs) & Recalls

• T-SB-0024-20: Supersedes the earlier TSB. Explicitly lists 'Unit reboots intermittently' and 'Diagnostic Trouble Code (DTC) U1110 or B15E6 is present' as conditions addressed by a software update for 2016 Camry models with Entune Audio, Audio Plus, or Premium Audio.
• T-SB-0003-19_Rev: An earlier, now obsolete version of the above TSB that also linked U1110 to infotainment glitches on the 2016-2017 Camry and other models. It was replaced by T-SB-0024-20.

Platform-Specific Known Issues

• Toyota issued Technical Service Bulletin T-SB-0024-20 (and its predecessor T-SB-0003-19_Rev) specifically to address DTC U1110 and B15E6 on 2016-2017 Camry models. The bulletin identifies a software issue as the cause for intermittent reboots, diagnostic screen display, screen flickering, and other Entune app malfunctions, and provides updated software as the repair.

Mechanic-Grade Diagnostic Values

• CAN Bus Network Resistance — expected: Approximately 60 Ω. Failure: A reading of ~120 Ω indicates an open in the bus or a missing terminating resistor (i.e., a module is offline). A reading significantly less than 60 Ω suggests a short circuit between the CAN lines.
• CAN High Voltage to Ground — expected: 2.5V to 3.0V DC. Failure: Voltage outside this range indicates a potential issue with the CAN transceiver in one of the modules or a wiring fault.
• CAN Low Voltage to Ground — expected: 2.0V to 2.5V DC. Failure: Voltage outside this range indicates a potential issue with the CAN transceiver in one of the modules or a wiring fault.

Hidden / Shadow Codes Worth Checking

• Not a DTC, but a status: In Toyota's Techstream software, the 'CAN Bus Check' or 'Health Check' utility provides a live overview of all communicating ECUs. A 'Not Communicating' status for the 'Multimedia' or 'Radio' module is the dealer-level confirmation of the fault that sets the U1110 code. (see via Toyota Techstream software connected to the vehicle.)

Scan Tool Commands That Help

• Techstream: Health Check / CAN Bus Check — This is the initial diagnostic step to get a live overview of the entire vehicle network. It quickly confirms if the multimedia head unit is the only module offline, validating that the U1110 code is specific to the radio and not a wider network problem.
• Techstream: ECU Reprogramming / Calibration Update — This function is used to load the updated firmware file from a USB drive onto the head unit. This is the specific repair procedure outlined in TSB T-SB-0024-20 to fix the software glitch causing the U1110 code.

Wiring & Ground Locations

• 28-Pin Head Unit Connector (e.g., 90980-12555) — The largest connector on the back of the multimedia head unit.. This connector contains the primary CAN bus communication wires for the radio. Pin 9 (Green wire) is CAN High and Pin 10 (White wire) is CAN Low. These are the primary pins to test for network resistance and voltage directly at the module if a network fault is suspected after a failed software update.
• Radio Chassis Ground — The metal chassis of the radio assembly is grounded to the main instrument panel support bar via its mounting bolts.. A poor ground can cause a variety of electrical issues, including communication faults. While not a common cause for this specific TSB-related issue, ensuring the radio's mounting bolts are secure is a valid check during a physical inspection.

Real Owner Repair Stories

• Reddit user Gunk_Olgidar in r/Toyota (2016 Toyota Camry) — Radio works only once per day, then will not turn on again until the next day.
  ❌ Tried (didn't work) Unknown, but multiple mechanics were unable to diagnose it.
  ✅ What actually fixed it This was a proposed diagnosis, not a confirmed fix. The user suggested a short circuit in a speaker wire (e.g., a single frayed strand touching metal). This can cause the radio's internal amplifier to enter a protection mode. The lockout circuit remains active until the large capacitors in the amplifier fully discharge, which can take many hours, explaining the 'once a day' behavior. The fix would be to inspect all speaker wiring for shorts.

OEM Part Supersession History

• Varies → 86140-06390 — This is a common service replacement part number for the non-JBL Entune audio unit.
  Heads up: Crucially, this part is for non-JBL sound systems. It is not compatible with vehicles equipped with the premium JBL audio system. Other compatible part numbers and faceplate IDs for the non-JBL unit include 86140-06680, 86140-06660, 100366, and P11224. Always verify compatibility by part number or VIN.

Model Year Variations Within This Range

• 2017: For the 2017 model year, the XLE and XSE trims came standard with the 'Entune Audio Plus with Connected Navigation App' and JBL audio. In 2016, this was an optional package. This means higher-trim 2017 models have different standard hardware and software than their 2016 counterparts, though they are still susceptible to the issues described in the TSBs.