AutoCodes – Toyota – U1002 2017 Toyota RAV4

U1002 2017 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 2017 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 453

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 U1002 2017 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 2017 Toyota RAV4 - Lost Communication with Gateway Module - AutoCodes.com — U1002 2017 Toyota RAV4 Code - Lost Communication with Gateway Module

What does this mean?

What are the Possible Causes of the DTC U1002 2017 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 2017 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 2017 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 2017 Toyota RAV4 Code

1. What does the OBDII code U1002 on a 2017 Toyota RAV4 mean?

The U1002 code indicates a communication problem with the Gateway Module in the vehicle.

2. What are the common symptoms of a U1002 code in a 2017 Toyota RAV4?

Common symptoms include issues with network communication, loss of certain vehicle functions, warning lights on the dashboard, and potentially drivability problems.

3. What are possible causes of a U1002 code in a 2017 Toyota RAV4?

Causes can include a faulty Gateway Module, damaged wiring or connectors, software issues, or problems with other modules on the network.

4. How can I diagnose a U1002 code in my 2017 Toyota RAV4?

Diagnosis typically involves using an OBDII scanner to retrieve the code, checking for any related codes, inspecting the wiring and connectors, and testing the Gateway Module and related components.

5. Can I still drive my 2017 Toyota RAV4 with a U1002 code?

It is not recommended to drive the vehicle with a U1002 code present, as it can affect important communication between modules and potentially lead to further issues.

6. How can I repair a U1002 code in my 2017 Toyota RAV4?

Repair options include fixing or replacing damaged wiring or connectors, reprogramming or replacing the Gateway Module, and addressing any underlying issues causing the communication problem.

7. Is it safe to clear a U1002 code on a 2017 Toyota RAV4?

Clearing the code may temporarily turn off the warning lights, but it is crucial to diagnose and repair the underlying issue to prevent the code from reappearing.

8. Can a U1002 code in a 2017 Toyota RAV4 be a DIY fix?

Depending on the cause of the code, some repairs like checking and securing connectors or replacing damaged wiring may be DIY-friendly. However, more complex issues may require professional diagnosis and repair.

9. How much does it cost to fix a U1002 code in a 2017 Toyota RAV4?

The cost of fixing a U1002 code can vary widely depending on the cause of the issue, parts needed, labor rates, and whether the repair is done at a dealership or an independent mechanic.

10. How can I prevent a U1002 code from occurring in my 2017 Toyota RAV4?

Regular maintenance, checking for software updates from the manufacturer, and addressing any electrical issues promptly can help prevent U1002 codes and other communication problems in your vehicle.