AutoCodes – Toyota – U1117 2014 Toyota RAV4

U1117 2014 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 2014 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 293

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 2014 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 2014 Toyota RAV4 - Lost Communication with Accessory Gateway - AutoCodes.com — U1117 2014 Toyota RAV4 Code - Lost Communication with Accessory Gateway

What does this mean?

What are the Possible Causes of the DTC U1117 2014 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 2014 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 2014 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 2014 Toyota RAV4 Code

1. What does OBDII code U1117 mean for a 2014 Toyota RAV4?

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

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

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

3. What are some possible causes of a U1117 code in a 2014 Toyota RAV4?

Possible causes include a faulty Accessory Gateway module, wiring issues, loose connections, or a communication network problem.

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

Diagnosing a U1117 code typically involves using a professional OBDII scanner to retrieve the code and then performing a thorough inspection of the Accessory Gateway module, wiring, and connections.

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

It may be possible to drive the vehicle with a U1117 code, but it is recommended to address the issue promptly to avoid potential problems with vehicle accessories.

6. How can I repair a U1117 code in my 2014 Toyota RAV4?

Repairing a U1117 code may involve replacing the Accessory Gateway module, repairing faulty wiring or connections, or addressing any communication network issues.

7. Are there any DIY tips for fixing a U1117 code in a Toyota RAV4?

While some troubleshooting steps can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for proper diagnosis and repair of a U1117 code.

8. Is resetting the OBDII system necessary after fixing a U1117 code in a Toyota RAV4?

After repairing a U1117 code, it is advisable to clear the code using an OBDII scanner to reset the system and ensure the issue has been successfully resolved.

9. How much does it cost to fix a U1117 code in a 2014 Toyota RAV4?

The cost of fixing a U1117 code can vary depending on the underlying issue, parts needed for repair, and labor costs. It is recommended to obtain quotes from local mechanics or dealerships.

10. Can a U1117 code in a Toyota RAV4 cause any long-term damage if left unresolved?

Leaving a U1117 code unresolved can potentially lead to further issues with vehicle accessories controlled by the Accessory Gateway module. It is best to address the problem promptly to prevent any long-term damage.