AutoCodes – Toyota – U1117 2016 Toyota RAV4

U1117 2016 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 2016 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 287

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 2016 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 2016 Toyota RAV4 - Lost Communication with Accessory Gateway - AutoCodes.com — U1117 2016 Toyota RAV4 Code - Lost Communication with Accessory Gateway

What does this mean?

What are the Possible Causes of the DTC U1117 2016 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 2016 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 2016 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 2016 Toyota RAV4 Code

1. What does the OBDII code U1117 for a 2016 Toyota RAV4 signify?

The U1117 code indicates a communication issue with the Accessory Gateway module in the vehicle.

2. What are the common symptoms of U1117 code on a 2016 Toyota RAV4?

Common symptoms include loss of functionality in certain vehicle accessories, such as power windows, power seats, or audio systems.

3. What are the possible causes of the U1117 code on a 2016 Toyota RAV4?

Potential causes of the U1117 code include faulty wiring connections, a malfunctioning Accessory Gateway module, or issues with the CAN bus communication network.

4. How can I diagnose the U1117 code on my 2016 Toyota RAV4?

Diagnosing the U1117 code typically involves checking the wiring connections to the Accessory Gateway module, inspecting the module itself for any visible damage, and using a diagnostic scan tool to analyze the communication network.

5. Can I still drive my 2016 Toyota RAV4 with the U1117 code present?

While the vehicle may still be drivable with the U1117 code, it is recommended to address the issue promptly to prevent further complications or potential safety hazards.

6. How can I repair the U1117 code on my 2016 Toyota RAV4?

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

7. Are there any DIY tips for resolving the U1117 code on a 2016 Toyota RAV4?

DIY tips for addressing the U1117 code may include checking and securing wiring connections, conducting visual inspections for any obvious issues, and resetting the system by disconnecting the battery for a few minutes.

8. Is it necessary to visit a mechanic for the U1117 code on a 2016 Toyota RAV4?

While some DIY troubleshooting may be possible for the U1117 code, consulting a qualified mechanic or technician is recommended for a thorough diagnosis and proper repair of the issue.

9. How much does it typically cost to fix the U1117 code on a 2016 Toyota RAV4?

The cost of repairing the U1117 code can vary depending on the exact cause of the issue, the required repairs or replacements, and the labor rates of the service provider. It's advisable to obtain a few quotes from different mechanics.

10. Can the U1117 code on a 2016 Toyota RAV4 trigger other related fault codes?

Yes, the U1117 code related to lost communication with the Accessory Gateway module can sometimes trigger additional fault codes in the vehicle's system, which may require further diagnosis and repair.