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U1117 2016 Toyota RAV4 Code - Lost Communication with Accessory Gateway

Quick Answer

The U1117 code for a 2016 Toyota RAV4 indicates that there is a communication issue with the Accessory Gateway module in the vehicle's network. Common causes include Faulty Accessory Gateway module, Loose or corroded wiring connections, Electrical interference or short circuits. 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 Accessory Gateway module, Loose or corroded wiring connections, Electrical interference or short circuits.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code U1117 2016 Toyota RAV4 Description

The U1117 code for a 2016 Toyota RAV4 indicates that there is a communication issue with the Accessory Gateway module in the vehicle's network. The Accessory Gateway module is responsible for managing communication between various electronic control units (ECUs) within the vehicle, allowing them to exchange information and function properly. When communication with the Accessory Gateway is lost, it can lead to malfunctions in different systems, affecting the vehicle's performance and safety.

OBDII Code U1117 2016 Toyota RAV4 - Lost Communication with Accessory Gateway
U1117 2016 Toyota RAV4 Code - Lost Communication with Accessory Gateway

Common Causes of U1117 2016 Toyota RAV4

  1. Faulty Accessory Gateway module
  2. Loose or corroded wiring connections
  3. Electrical interference or short circuits
  4. Software glitches or programming errors
  5. Water damage or exposure to moisture

Symptoms of U1117 2016 Toyota RAV4

  1. Malfunctioning audio system or display
  2. Inoperative power windows or locks
  3. Climate control system not responding
  4. Warning lights illuminated on the dashboard
  5. Overall loss of functionality in accessory systems

How to Fix U1117 2016 Toyota RAV4

  1. Perform a diagnostic scan to confirm the U1117 code and identify the specific communication issue.
  2. Inspect wiring connections for any signs of damage, corrosion, or loose connections.
  3. Test the Accessory Gateway module for proper functionality or replace it if necessary.
  4. Clear the code from the vehicle's system and reset any affected modules.
  5. Conduct a road test to ensure all systems are communicating correctly and functioning as expected.

Cost to Fix U1117 2016 Toyota RAV4

The typical repair costs for addressing a U1117 code in a 2016 Toyota RAV4 can range from $200 to $500, depending on the specific cause of the communication issue and the required repairs. This estimate includes the cost of parts such as a new Accessory Gateway module if needed, as well as labor charges for diagnosis and repair. It's essential to consider that actual repair costs can vary based on the location of the repair shop, the vehicle's make and model, and any additional factors that may impact the repair process. It is recommended to consult with a qualified mechanic or dealership for a more accurate estimate based on your individual circumstances.

What does this mean?

Tech Notes for U1117 2016 Toyota RAV4

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.

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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.

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