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U1117 2018 Toyota RAV4 Code - Lost Communication with Accessory Gateway

Quick Answer

The U1117 diagnostic trouble code (DTC) for a 2018 Toyota RAV4 indicates that there is a communication issue with the Accessory Gateway Module. Common causes include Wiring harness issues, such as damaged or corroded wires, Loose or poor connections at the Accessory Gateway Module, Faulty Accessory Gateway Module. 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 2018 Toyota RAV4 indicates Lost Communication with Accessory Gateway.
Common causes
Common causes include Wiring harness issues, such as damaged or corroded wires, Loose or poor connections at the Accessory Gateway Module, Faulty Accessory Gateway Module.
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 Sep 15, 2024
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Code U1117 2018 Toyota RAV4 Description

The U1117 diagnostic trouble code (DTC) for a 2018 Toyota RAV4 indicates that there is a communication issue with the Accessory Gateway Module. The Accessory Gateway Module serves as a central hub for various electronic accessories in the vehicle, such as the radio, navigation system, climate control, and more. When communication is lost with this module, it can lead to malfunctions in these systems, affecting the overall performance of the vehicle.

OBDII Code U1117 2018 Toyota RAV4 - Lost Communication with Accessory Gateway
U1117 2018 Toyota RAV4 Code - Lost Communication with Accessory Gateway

Common Causes of U1117 2018 Toyota RAV4

  1. Wiring harness issues, such as damaged or corroded wires
  2. Loose or poor connections at the Accessory Gateway Module
  3. Faulty Accessory Gateway Module
  4. Network communication bus malfunctions
  5. Software glitches or programming errors

Symptoms of U1117 2018 Toyota RAV4

  1. Check Engine Light illuminated on the dashboard
  2. Inoperative radio or entertainment system
  3. Climate control system not functioning properly
  4. Navigation system displaying errors or not working
  5. Intermittent issues with other electronic accessories

How to Fix U1117 2018 Toyota RAV4

  1. Begin by conducting a thorough inspection of the wiring harness and connectors associated with the Accessory Gateway Module. Repair or replace any damaged wires or connectors.
  2. Check the connections at the Accessory Gateway Module and ensure they are secure. Clean any corroded terminals and reestablish proper connections.
  3. If the Accessory Gateway Module is found to be faulty, it will need to be replaced with a new unit. Ensure the replacement module is compatible with the vehicle's make and model.
  4. Perform a diagnostic scan to reset the communication system and clear the DTC. Test the affected accessories to verify proper operation.
  5. Conduct a road test to confirm that the communication issue has been resolved and that all electronic systems are functioning correctly.

Cost to Fix U1117 2018 Toyota RAV4

The typical repair costs for addressing a U1117 code on a 2018 Toyota RAV4 can vary depending on the specific cause of the communication issue. In general, the cost of parts for a new Accessory Gateway Module can range from $200 to $500, while labor costs can add an additional $100 to $200. Overall, the total repair cost for this issue may fall within the range of $300 to $700. It is important to note that diagnosis time and labor rates at auto repair shops can vary, so it is advisable to check with local service providers for a more accurate estimate.

What does this mean?

Tech Notes for U1117 2018 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 2018 Toyota RAV4 Code

1. What does the OBDII code U1117 on a 2018 Toyota RAV4 mean?

The U1117 code 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 2018 Toyota RAV4?

Common symptoms may include loss of communication with certain vehicle systems, malfunction indicator light (MIL) on the dashboard, and potential issues with accessories or features controlled by the Accessory Gateway.

3. What are the possible causes of U1117 code in a 2018 Toyota RAV4?

Possible causes of the U1117 code include damaged wiring or connectors, a faulty Accessory Gateway module, software issues, or a problem with the vehicle's control modules.

4. How can I diagnose the U1117 code on my 2018 Toyota RAV4?

Diagnosing the U1117 code typically involves using an OBDII scanner to retrieve the code and performing a thorough inspection of the wiring, connectors, and modules related to the Accessory Gateway system.

5. Can I still drive my 2018 Toyota RAV4 with the U1117 code present?

It is generally not recommended to drive the vehicle with the U1117 code active, as it may lead to further communication issues and potential malfunctions of critical vehicle systems.

6. How can I repair the U1117 code on my 2018 Toyota RAV4?

Repairing the U1117 code may involve repairing or replacing damaged wiring or connectors, replacing the Accessory Gateway module if necessary, updating software, or addressing any underlying issues with the control modules.

7. Is it possible to reset the U1117 code on a 2018 Toyota RAV4?

Resetting the U1117 code can be done using an OBDII scanner after the underlying issue has been diagnosed and repaired. However, simply clearing the code without addressing the root cause may lead to it reoccurring.

8. Will the U1117 code cause my 2018 Toyota RAV4 to fail an emissions test?

The U1117 code itself may not directly cause the vehicle to fail an emissions test, but it is indicative of a potential issue with the vehicle's communication systems that should be addressed to ensure proper functionality.

9. How much does it typically cost to repair the U1117 code on a 2018 Toyota RAV4?

The cost of repairing the U1117 code can vary depending on the specific cause of the issue, the extent of the repairs needed, and labor rates. It is recommended to consult with a qualified mechanic for an accurate estimate.

10. Can the U1117 code on a 2018 Toyota RAV4 be a recurring issue?

If the underlying cause of the U1117 code is not properly addressed, it is possible for the code to reoccur. Proper diagnosis and repair of the communication issue are essential to prevent the code from coming back.

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