AutoCodes – Toyota – U0327 2015 Toyota RAV4

U0327 2015 Toyota RAV4 Code - Lost Communication with Vehicle Security Control 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 Vehicle Security Control Module, Vehicle Security Control 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: U0327 2015 Toyota RAV4 indicates Lost Communication with Vehicle Security Control Module.
Common causes: Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Vehicle Security Control Module, Vehicle Security Control 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 178

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 27, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U0327 2015 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 Vehicle Security Control Module has not been received.

OBDII Code U0327 2015 Toyota RAV4 - Lost Communication with Vehicle Security Control Module - AutoCodes.com — U0327 2015 Toyota RAV4 Code - Lost Communication with Vehicle Security Control Module

What does this mean?

What are the Possible Causes of the DTC U0327 2015 Toyota RAV4?

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

How to Fix the DTC U0327 2015 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 U0327 2015 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.

Need more information about the U0327 2015 Toyota RAV4 code?

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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 U0327 2015 Toyota RAV4 Code

1. What are the common symptoms of OBDII code U0327 in a 2015 Toyota RAV4?

The common symptoms include issues with the vehicle's security system, such as difficulty starting the car, random alarm triggers, or the security light staying on.

2. What does the OBDII code U0327 in a 2015 Toyota RAV4 mean?

The code U0327 indicates a communication problem between the vehicle's onboard computer and the Vehicle Security Control Module.

3. What are the possible causes of OBDII code U0327 in a 2015 Toyota RAV4?

Possible causes include a faulty Vehicle Security Control Module, damaged wiring or connectors, or a software issue within the vehicle's system.

4. How can I diagnose the issue related to OBDII code U0327 in my 2015 Toyota RAV4?

Diagnosing the issue may require using a diagnostic scanner to retrieve the specific codes and performing a thorough inspection of the vehicle's security system components.

5. Can I still drive my 2015 Toyota RAV4 with the U0327 code?

It is generally not recommended to drive the vehicle with unresolved communication issues, as it may affect the proper functioning of the security system and potentially lead to other problems.

6. How can I repair OBDII code U0327 in my 2015 Toyota RAV4?

Repairing the issue may involve checking and repairing any damaged wiring or connectors, replacing the Vehicle Security Control Module if necessary, and ensuring proper communication between the modules.

7. Is resetting the OBDII code U0327 in my 2015 Toyota RAV4 enough to fix the issue?

Simply resetting the code may temporarily clear the error message, but it is essential to address the root cause of the communication problem to prevent the code from reappearing.

8. Can a DIY enthusiast fix the OBDII code U0327 issue in a 2015 Toyota RAV4?

While some basic troubleshooting steps can be taken by DIY enthusiasts, fixing the U0327 code may require advanced diagnostic tools and expertise, making it advisable to seek professional help.

9. How much does it cost to repair OBDII code U0327 in a 2015 Toyota RAV4?

The cost of repairing the U0327 code can vary depending on the specific cause of the communication issue, the parts needed for replacement, and the labor charges at the repair shop.

10. How can I prevent OBDII code U0327 from occurring in my 2015 Toyota RAV4 in the future?

Regularly maintaining your vehicle, checking for any signs of wiring damage, and promptly addressing any security system issues can help prevent the recurrence of the U0327 code.