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U0327 2014 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 2014 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 236

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 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 Vehicle Security Control Module has not been received.

OBDII Code U0327 2014 Toyota RAV4 - Lost Communication with Vehicle Security Control Module - AutoCodes.com — U0327 2014 Toyota RAV4 Code - Lost Communication with Vehicle Security Control Module

What does this mean?

What are the Possible Causes of the DTC U0327 2014 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 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 U0327 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.

Need more information about the U0327 2014 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 2014 Toyota RAV4 Code

1. What are the common symptoms of OBDII code U0327 in a 2014 Toyota RAV4?

- Common symptoms include the illumination of the Check Engine light, difficulty starting the vehicle, erratic behavior of security features, and loss of communication with the vehicle security control module.

2. What can cause the OBDII code U0327 in a 2014 Toyota RAV4?

- The code U0327, indicating Lost Communication with Vehicle Security Control Module, can be caused by issues such as a faulty security control module, damaged wiring or connectors, a software glitch, or a weak battery.

3. How should I diagnose the OBDII code U0327 in my 2014 Toyota RAV4?

- To diagnose code U0327, it is recommended to use a diagnostic scanner to retrieve the specific fault codes, inspect the wiring and connectors related to the security control module, and perform a thorough visual inspection for any visible damage.

4. Can I repair the OBDII code U0327 in my 2014 Toyota RAV4 myself?

- While some basic troubleshooting steps can be done by DIY enthusiasts, diagnosing and repairing OBDII code U0327 may require advanced diagnostic tools and expertise. It is advisable to seek help from a professional mechanic for accurate diagnosis and repair.

5. What are some tips for repairing the OBDII code U0327 in a 2014 Toyota RAV4?

- Tips for repairing code U0327 include checking and repairing any damaged wiring or connectors, ensuring the security control module is functioning properly, performing a software update if necessary, and clearing the code with a diagnostic scanner after the repair.

6. Is it safe to continue driving my 2014 Toyota RAV4 with the OBDII code U0327?

- It is not recommended to drive the vehicle with unresolved OBDII code U0327, as it may affect the proper functioning of the vehicle's security features and potentially lead to further issues. It is best to address the problem promptly.

7. How much does it typically cost to repair the OBDII code U0327 in a 2014 Toyota RAV4?

- The cost of repairing code U0327 can vary depending on the underlying cause of the issue, the labor rates in your area, and whether any parts need to be replaced. It is advisable to obtain a few quotes from reputable mechanics for an accurate estimate.

8. Can a weak battery trigger the OBDII code U0327 in a 2014 Toyota RAV4?

- Yes, a weak or failing battery can potentially trigger code U0327 by causing voltage fluctuations that disrupt communication with the vehicle security control module. It is recommended to have the battery tested as part of the diagnostic process.

9. Are there any recalls or technical service bulletins related to the OBDII code U0327 in a 2014 Toyota RAV4?

- It is recommended to check with the nearest Toyota dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or technical service bulletins related to OBDII code U0327 in the 2014 Toyota RAV4.

10. Can extreme weather conditions contribute to triggering the OBDII code U0327 in a 2014 Toyota RAV4?

- Extreme weather conditions, such as excessive heat or moisture, can potentially affect the electrical components of the vehicle, including the security control module, and contribute to triggering code U0327. Ensuring proper weatherproofing and maintenance can help prevent such issues.