AutoCodes – Toyota – U1117 2013 Toyota RAV4

U1117 2013 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 2013 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 413

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 2013 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 2013 Toyota RAV4 - Lost Communication with Accessory Gateway - AutoCodes.com — U1117 2013 Toyota RAV4 Code - Lost Communication with Accessory Gateway

What does this mean?

What are the Possible Causes of the DTC U1117 2013 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 2013 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 2013 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 2013 Toyota RAV4 Code

1. What does the OBDII code U1117 mean on a 2013 Toyota RAV4?

The code U1117 indicates a communication problem between the vehicle's control modules and the Accessory Gateway module.

2. What are the common symptoms of U1117 code in a 2013 Toyota RAV4?

Common symptoms include issues with the power windows, door locks, interior lights, and other accessories controlled by the Accessory Gateway module.

3. What are the possible causes of the U1117 code in a 2013 Toyota RAV4?

Possible causes include a faulty Accessory Gateway module, wiring issues, loose connections, or a malfunctioning control module.

4. How can I diagnose the U1117 code on my 2013 Toyota RAV4?

Diagnosing the U1117 code typically involves checking the wiring and connections related to the Accessory Gateway module, as well as using a diagnostic tool to communicate with the control modules.

5. Can I still drive my 2013 Toyota RAV4 with the U1117 code present?

It is not recommended to drive the vehicle with the U1117 code present, as it may affect the functionality of important accessories and systems in the vehicle.

6. How can I repair the U1117 code on my 2013 Toyota RAV4?

Repairing the U1117 code may involve replacing the Accessory Gateway module, repairing any damaged wiring or connections, and clearing the code with a diagnostic tool.

7. Will resetting the U1117 code make it go away permanently?

Resetting the code may temporarily clear it, but if the underlying issue causing the code is not addressed, it is likely to reappear.

8. Can a DIY enthusiast fix the U1117 code on a 2013 Toyota RAV4?

While some basic troubleshooting steps can be taken by a DIY enthusiast, diagnosing and repairing the U1117 code may require specialized tools and expertise.

9. How much does it cost to repair the U1117 code on a 2013 Toyota RAV4?

The cost of repairing the U1117 code can vary depending on the specific underlying issue, the labor rates in your area, and whether new parts are needed.

10. Is the U1117 code a common issue in the 2013 Toyota RAV4?

While not extremely common, the U1117 code can occur in the 2013 Toyota RAV4 due to communication issues with the Accessory Gateway module.