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U0327 2013 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 2013 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 214

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 2013 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 2013 Toyota RAV4 - Lost Communication with Vehicle Security Control Module - AutoCodes.com — U0327 2013 Toyota RAV4 Code - Lost Communication with Vehicle Security Control Module

What does this mean?

What are the Possible Causes of the DTC U0327 2013 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 2013 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 2013 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 2013 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 2013 Toyota RAV4 Code

1. What are the common symptoms of OBDII code U0327 in a 2013 Toyota RAV4?

The common symptoms of code U0327 "Lost Communication with Vehicle Security Control Module" in a 2013 Toyota RAV4 may include issues with the vehicle's security system, such as problems with the alarm system or key fob functionality.

2. What are the possible causes of OBDII code U0327 in a 2013 Toyota RAV4?

Possible causes of code U0327 in a 2013 Toyota RAV4 include a faulty vehicle security control module, wiring or connection issues, a blown fuse related to the security system, or a software glitch.

3. How can I diagnose the reason behind OBDII code U0327 in my 2013 Toyota RAV4?

To diagnose the cause of code U0327 in a 2013 Toyota RAV4, you may need to perform a thorough inspection of the vehicle security control module, check for any damaged wiring or loose connections, and use a diagnostic scanner to retrieve additional fault codes.

4. Can I still drive my 2013 Toyota RAV4 with OBDII code U0327 present?

It is generally not recommended to drive your 2013 Toyota RAV4 with code U0327 present, as it indicates a communication issue with the vehicle security control module, which is an important component for the security system's proper functioning.

5. How can I repair OBDII code U0327 in a 2013 Toyota RAV4?

Repairing code U0327 in a 2013 Toyota RAV4 may involve replacing the faulty vehicle security control module, repairing any damaged wiring or connections, checking and replacing blown fuses, and clearing the trouble codes with a diagnostic scanner.

6. Is it possible to reset OBDII code U0327 in a 2013 Toyota RAV4 without professional help?

You may be able to temporarily clear code U0327 in a 2013 Toyota RAV4 by disconnecting the vehicle's battery for a few minutes, but it is recommended to seek professional help to diagnose and repair the underlying issue causing the code.

7. Will OBDII code U0327 in a 2013 Toyota RAV4 cause any other problems besides the security system?

While code U0327 primarily relates to the vehicle security control module, it may also affect other systems dependent on the security module's data, potentially leading to issues with starting the vehicle or other security-related functions.

8. How much does it cost to fix OBDII code U0327 in a 2013 Toyota RAV4?

The cost to fix code U0327 in a 2013 Toyota RAV4 can vary depending on the exact cause of the issue, the parts needed for repair, and labor costs. It is advisable to consult a professional mechanic for an accurate estimate.

9. Can extreme weather conditions trigger OBDII code U0327 in a 2013 Toyota RAV4?

Extreme weather conditions, such as extreme heat or cold, can potentially cause electrical issues that may trigger code U0327 in a 2013 Toyota RAV4 by affecting the vehicle's wiring or control module functionality.

10. Is OBDII code U0327 a common issue in 2013 Toyota RAV4 vehicles?

While code U0327 "Lost Communication with Vehicle Security Control Module" is not as common as some other OBDII codes, it can still occur in 2013 Toyota RAV4 vehicles due to various factors like component failure, wiring issues, or software malfunctions.