AutoCodes – Toyota – U1117 2015 Toyota RAV4

U1117 2015 Toyota RAV4 Code - Lost Communication with Accessory Gateway

Quick Answer

The Controller Area Network (CAN) is a standard bus system in vehicles that enables the connection of automotive devices without the need for a host computer. Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Multiplex Network Door ECU, Multiplex Network Door ECU harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: U1117 2015 Toyota RAV4 indicates Lost Communication with Accessory Gateway.
Common causes: Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Multiplex Network Door ECU, Multiplex Network Door ECU harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 457

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Mar 28, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U1117 2015 Toyota RAV4 Description

The Controller Area Network (CAN) is a standard bus system in vehicles that enables the connection of automotive devices without the need for a host computer. The exchange of operating information and commands among devices is facilitated by pre-programmed information about the required message exchange on the serial data circuits. Communication is carried out using two dedicated wires, known as CAN high and CAN low, with both lines carrying 2.5V when the CAN bus is in idle mode. During the transmission of data bits, the CAN high line increases to 3.75V while the CAN low drops to 1.25V, creating a 2.5V differential between the lines. Since communication relies on a voltage differential between the two bus lines, the CAN bus is NOT sensitive to inductive spikes, electrical fields, or other noise. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Multiplex Network Door ECU has not been received.

OBDII Code U1117 2015 Toyota RAV4 - Lost Communication with Accessory Gateway - AutoCodes.com — U1117 2015 Toyota RAV4 Code - Lost Communication with Accessory Gateway

What does this mean?

What are the Possible Causes of the DTC U1117 2015 Toyota RAV4?

Faulty Controller Area Network (CAN) Communication System
Faulty Multiplex Network Door ECU
Multiplex Network Door ECU harness is open or shorted
Multiplex Network Door ECU circuit poor electrical connection

How to Fix the DTC U1117 2015 Toyota RAV4?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

When there are problems with the way different systems in a vehicle communicate with each other using a technology called Controller Area Network (CAN) communication, Diagnostic Trouble Codes (DTC) are displayed. These codes can be caused by issues with the main bus or branch of the communication network, or with the Electronic Control Units (ECUs) and sensors that make up the different systems. If you see code for both the CAN communication problems and internal or power source problems at the same time, you should focus on fixing the internal or power source problems first.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1117 2015 Toyota RAV4 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U1117 2015 Toyota RAV4 Code

1. What does the OBDII code U1117 mean for a 2015 Toyota RAV4?

The code U1117 means "Lost Communication with Accessory Gateway" in the OBDII system of a 2015 Toyota RAV4.

2. What are the common symptoms of a U1117 code in a 2015 Toyota RAV4?

Common symptoms of the U1117 code may include a loss of communication with certain vehicle accessories, malfunctioning infotainment system, or issues with power windows and other electronic components.

3. What are the possible causes of a U1117 code in a 2015 Toyota RAV4?

Possible causes of the U1117 code include a faulty accessory gateway module, damaged wiring or connectors, software glitches, or a communication bus problem within the vehicle's network.

4. How can I diagnose a U1117 code in my 2015 Toyota RAV4?

Diagnosing a U1117 code typically involves using a diagnostic scanner to retrieve the code, checking for other related trouble codes, inspecting wiring and connectors for damage, and testing the accessory gateway module for proper functionality.

5. Can a U1117 code in a 2015 Toyota RAV4 be fixed at home?

Fixing a U1117 code at home may be possible if you have the necessary tools and expertise. However, due to the complexity of the vehicle's electrical system, it is recommended to consult with a professional mechanic for an accurate diagnosis and repair.

6. How much does it cost to repair a U1117 code in a 2015 Toyota RAV4?

The cost of repairing a U1117 code in a 2015 Toyota RAV4 can vary depending on the underlying cause of the issue. Simple fixes like repairing wiring may cost less, while replacing a faulty accessory gateway module or addressing a communication bus problem can be more expensive.

7. Is it safe to drive with a U1117 code present in a 2015 Toyota RAV4?

Driving with a U1117 code may not present immediate safety risks, but it can lead to issues with vehicle accessories and electronic components. It is advisable to address the problem promptly to avoid further complications.

8. Can a U1117 code in a 2015 Toyota RAV4 cause other problems if left unaddressed?

If left unaddressed, a U1117 code in a 2015 Toyota RAV4 can lead to continued loss of communication with vital vehicle systems, potential malfunctions in electronic components, and overall inconvenience in operating the vehicle.

9. Are there any recalls or technical service bulletins related to the U1117 code in a 2015 Toyota RAV4?

It is recommended to check with Toyota dealerships or online resources for any recalls or technical service bulletins related to the U1117 code in a 2015 Toyota RAV4, as manufacturers may provide guidance on addressing such issues.

10. How can I prevent a U1117 code from occurring in my 2015 Toyota RAV4 in the future?

To prevent a U1117 code from occurring in the future, regularly inspect and maintain the vehicle's electrical system, avoid water damage to electronic components, and address any warning signs of communication issues promptly to prevent further damage.