U1110 on Toyota: How to Diagnose & Fix
Network Communication Fault (manufacturer-specific; commonly Lost Vehicle Speed Message)
2 Toyota models · 2 documented issues
U1110 on Toyota by model: symptoms, diagnosis and fix
Toyota T-SB-0003-19 covers specified Fujitsu Ten Entune Audio, Audio Plus and Premium Audio head units in 2016-2017 Camry and Camry Hybrid vehicles. Depending on unit and software version, listed conditions include intermittent reboot or freeze, Bluetooth disconnect/operation problems, backup-camera display timing, missing/mismatched audio information, phone-book or message issues and DTC U1110, B15E6 or U0293. It does not support the original 2018-2023 scope, Android Auto claim or a universal freezing/backup-camera defect.
Common Symptoms
- Head unit reboots intermittently
- Intermittent freeze condition
- Intermittent Bluetooth disconnection or abnormal operation
- Backup camera stays on too long
- Audio or phone information is missing or mismatched
How to Fix
Record the exact symptom, head-unit panel ID and current software versions. Apply T-SB-0003-19 only to a listed Fujitsu Ten unit with software older than Toyota's specified version; follow the bulletin's controlled USB update and verification steps. If the software is current, Toyota says the bulletin does not apply and normal diagnosis continues. Do not replace the head unit, erase all pairings or assume a power-button reset is a repair unless the exact diagnostic procedure calls for it.
Owner tips & cautions
- TipPhotograph the panel ID and software-version screens before updating; T-SB-0003-19 only applies to listed Fujitsu Ten units below Toyota's specified versions.
- WarningDo not interrupt accessory power during Toyota's update sequence. If the unit is already current, continue diagnosis instead of repeating or forcing the update.
Sources for this issue (1)
Toyota T-SB-0024-20 applies to specified Denso-Ten Entune Audio, Audio Plus and Premium Audio faceplate/software combinations in 2016-2018 RAV4 and RAV4 Hybrid vehicles. The covered symptom list includes certain intermittent reboots or freezes, Bluetooth/audio behavior, navigation or display anomalies and, for applicable versions, DTC U1110 or B15E6. This is not evidence of one universal 2016-2021 RAV4 head-unit defect or an automatic need for hardware replacement.
Common Symptoms
- Intermittent Entune head-unit reboot or freeze
- Supported Bluetooth or audio operation anomaly
- Supported navigation or display anomaly
How to Fix
Record the exact symptom, phone/device context, head-unit faceplate ID and current software version. A Toyota dealer or qualified technician should compare them with T-SB-0024-20 and install the specified software only when the bulletin's gates are met. If the software is already current, the faceplate is not listed or the symptom persists, continue the applicable audio/visual repair-manual diagnosis before considering hardware. The original 36-month/36,000-mile basic-warranty window is expired; confirm any update charge in advance. Do not buy a generic powertrain OBD scanner as the remedy for this multimedia condition.
Owner tips & cautions
- TipPhotograph the faceplate ID and software-version screen and note the paired phone model/OS before requesting an update.
- WarningDo not replace the head unit or buy a powertrain scan tool from this card; current software, connections and bulletin applicability must be checked first.
Sources for this issue (2)
U1110 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does U1110 mean on a Toyota?
U1110 stands for "Network Communication Fault (manufacturer-specific; commonly Lost Vehicle Speed Message)." U1110 is a manufacturer-specific network (U) code, so its exact meaning varies by automaker. It generally indicates a data-bus communication problem; on several makes (such as Chrysler and Ford) it is associated with a lost or invalid vehicle speed message, meaning a module did not receive the expected speed data over the network. Loss of this data can affect modules that rely on vehicle speed, sometimes causing speedometer, cruise, or related symptoms. The specific definition should be confirmed against the vehicle's service information. On Toyota it is documented across 2 models: Camry, RAV4.
What are the most common causes of U1110?
The most common causes of U1110 are: Wiring or connector fault on the communication bus, Faulty source module (e.g., ABS module sending speed data), Loss of power or ground to a networked module, Corroded connector pins, Bus wiring short or open, Faulty receiving control module. The specific cause varies by vehicle.
How much does it cost to fix U1110 on a Toyota?
Repair costs vary widely with the root cause and Toyota model; each issue on this page carries its own estimate where one is published.
Looking for U1110 on a different make?
View U1110 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.