AutoCodes – Toyota – U1002 2014 Toyota RAV4

U1002 2014 Toyota RAV4 Code - Lost Communication with Gateway Module

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 Gateway Module, Gateway Module 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: U1002 2014 Toyota RAV4 indicates Lost Communication with Gateway Module.
Common causes: Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Gateway Module, Gateway Module 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 562

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

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 U1002 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 Gateway Module has not been received.

OBDII Code U1002 2014 Toyota RAV4 - Lost Communication with Gateway Module - AutoCodes.com — U1002 2014 Toyota RAV4 Code - Lost Communication with Gateway Module

What does this mean?

What are the Possible Causes of the DTC U1002 2014 Toyota RAV4?

Faulty Controller Area Network (CAN) Communication System
Faulty Gateway Module
Gateway Module harness is open or shorted
Gateway Module circuit poor electrical connection

How to Fix the DTC U1002 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 U1002 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 U1002 2014 Toyota RAV4 Code

1. What does the OBDII code U1002 in a 2014 Toyota RAV4 indicate?

The U1002 code in a 2014 Toyota RAV4 signifies a communication problem with the Gateway Module.

2. What are the common symptoms associated with the U1002 code in a 2014 Toyota RAV4?

Common symptoms of the U1002 code include issues with the vehicle's network communication, such as the loss of connection with various modules and sensors.

3. What are the possible causes of the U1002 code in a 2014 Toyota RAV4?

Potential causes of the U1002 code include damaged wiring, faulty connections, a malfunctioning Gateway Module, or issues with the vehicle's network communication system.

4. How can I diagnose the U1002 code in my 2014 Toyota RAV4?

Diagnosing the U1002 code typically involves using an OBDII scanner to retrieve the code, checking the connections and wiring related to the Gateway Module, and performing a network communication test.

5. Is it safe to drive my 2014 Toyota RAV4 with the U1002 code present?

It is not recommended to drive your vehicle with the U1002 code active, as it can lead to potential safety hazards and affect the performance of various vehicle systems.

6. Can I repair the U1002 code in my 2014 Toyota RAV4 myself?

Depending on your level of automotive knowledge, you may be able to address the U1002 code yourself by checking connections, inspecting wiring, and replacing any faulty components. However, professional assistance may be required for more complex issues.

7. How much does it typically cost to repair the U1002 code in a 2014 Toyota RAV4?

The cost of repairing the U1002 code in a 2014 Toyota RAV4 can vary depending on the underlying cause of the issue, the extent of the repairs needed, and the labor rates of the repair shop. It is recommended to obtain quotes from different mechanics for an accurate estimate.

8. What steps should I take if the U1002 code keeps coming back after repairs?

If the U1002 code persists after repairs, it is essential to recheck all connections, wiring, and components related to the Gateway Module. It may also be necessary to perform a more in-depth diagnosis to identify any underlying issues.

9. Can the U1002 code in a 2014 Toyota RAV4 cause other problems in the vehicle?

Yes, the U1002 code can potentially lead to issues with other vehicle systems that rely on proper network communication. It is crucial to address the code promptly to prevent further complications.

10. How can I prevent the U1002 code from recurring in my 2014 Toyota RAV4?

Regular maintenance, including checking connections and wiring, can help prevent the U1002 code from reappearing in your 2014 Toyota RAV4. Additionally, addressing any network communication issues promptly can help maintain the overall health of your vehicle's systems.