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U0327 2013 Toyota RAV4 Code - Lost Communication with Vehicle Security Control Module

Quick Answer

The U0327 diagnostic trouble code (DTC) in a 2013 Toyota RAV4 indicates that there has been a communication failure between the vehicle's onboard computer system and the Vehicle Security Control Module (VSCM). Common causes include Faulty Wiring: Damaged or corroded wiring connections between the ECM/BCM and the VSCM can disrupt communication, Defective VSCM: A malfunctioning Vehicle Security Control Module can prevent proper communication with the ECM/BCM, Software Glitch: An issue with the software programming in the ECM/BCM can lead to communication errors with the VSCM. 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 Wiring: Damaged or corroded wiring connections between the ECM/BCM and the VSCM can disrupt communication, Defective VSCM: A malfunctioning Vehicle Security Control Module can prevent proper communication with the ECM/BCM, Software Glitch: An issue with the software programming in the ECM/BCM can lead to communication errors with the VSCM.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code U0327 2013 Toyota RAV4 Description

The U0327 diagnostic trouble code (DTC) in a 2013 Toyota RAV4 indicates that there has been a communication failure between the vehicle's onboard computer system and the Vehicle Security Control Module (VSCM). The VSCM is a crucial component responsible for managing the security features of the vehicle, such as the alarm system, immobilizer, and keyless entry functions. When communication with the VSCM is lost, it can have a significant impact on the overall performance and security of the vehicle.

OBDII Code U0327 2013 Toyota RAV4 - Lost Communication with Vehicle Security Control Module
U0327 2013 Toyota RAV4 Code - Lost Communication with Vehicle Security Control Module

Common Causes of U0327 2013 Toyota RAV4

  1. Faulty Wiring: Damaged or corroded wiring connections between the ECM/BCM and the VSCM can disrupt communication.
  2. Defective VSCM: A malfunctioning Vehicle Security Control Module can prevent proper communication with the ECM/BCM.
  3. Software Glitch: An issue with the software programming in the ECM/BCM can lead to communication errors with the VSCM.
  4. Control Module Damage: Physical damage to any of the control modules involved in the communication process can trigger the U0327 code.
  5. Electrical Interference: External factors such as electromagnetic interference or poor grounding can disrupt communication signals between modules.

Symptoms of U0327 2013 Toyota RAV4

  1. Check Engine Light: The illumination of the check engine light on the dashboard is a common symptom associated with the U0327 code.
  2. Security System Malfunction: Issues with the vehicle's security system, such as the alarm going off unexpectedly or the keyless entry system not working, can indicate a communication problem with the VSCM.
  3. Immobilizer Activation: The vehicle may not start or may be immobilized if the communication with the VSCM is lost.
  4. Loss of Keyless Entry Function: Inability to unlock or lock the vehicle using the keyless entry system can be a symptom of this code.

How to Fix U0327 2013 Toyota RAV4

  1. Diagnostic Scan: Perform a comprehensive diagnostic scan using an OBD-II scanner to retrieve the U0327 code and any related codes for further investigation.
  2. Inspect Wiring and Connectors: Thoroughly inspect the wiring harness and connectors between the ECM/BCM and the VSCM for any signs of damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test VSCM Functionality: Test the Vehicle Security Control Module to ensure it is functioning properly. Replace the VSCM if it is found to be defective.
  4. ECM/BCM Software Update: Check for any available software updates for the ECM/BCM and perform the update to address any potential software glitches causing the communication failure.
  5. Clear Codes and Test: Clear the DTCs from the vehicle's memory after completing the repairs and perform a test drive to verify that the issue has been resolved.

Cost to Fix U0327 2013 Toyota RAV4

The typical repair costs for addressing the U0327 code in a 2013 Toyota RAV4 can vary depending on the specific cause of the communication failure. On average, the parts required for this repair, such as a replacement VSCM or wiring harness, can range from $200 to $500. Labor costs at an auto repair shop can range from $100 to $300, with the total repair cost falling between $300 and $800.

What does this mean?

Tech Notes for U0327 2013 Toyota RAV4

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.

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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.

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