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U0327 2016 Toyota RAV4 Code - Lost Communication with Vehicle Security Control Module

Quick Answer

The U0327 diagnostic trouble code (DTC) indicates that there is a communication problem between the vehicle's onboard computer system and the Vehicle Security Control Module (VSCM). Common causes include Faulty wiring or connectors leading to the VSCM, A malfunctioning VSCM, Software issues within the onboard computer system. 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 2016 Toyota RAV4 indicates Lost Communication with Vehicle Security Control Module.
Common causes
Common causes include Faulty wiring or connectors leading to the VSCM, A malfunctioning VSCM, Software issues within the onboard computer system.
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 15, 2024
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Code U0327 2016 Toyota RAV4 Description

The U0327 diagnostic trouble code (DTC) indicates that there is a communication problem between the vehicle's onboard computer system and the Vehicle Security Control Module (VSCM). The VSCM is responsible for managing the security features of the vehicle, such as the alarm system, immobilizer, and keyless entry. When communication is lost with the VSCM, it can lead to issues with the vehicle's security systems, potentially compromising the safety and security of the vehicle.

OBDII Code U0327 2016 Toyota RAV4 - Lost Communication with Vehicle Security Control Module
U0327 2016 Toyota RAV4 Code - Lost Communication with Vehicle Security Control Module

Common Causes of U0327 2016 Toyota RAV4

  1. Faulty wiring or connectors leading to the VSCM.
  2. A malfunctioning VSCM.
  3. Software issues within the onboard computer system.
  4. Corrosion or damage to the wiring harness.
  5. Electrical interference from aftermarket accessories or modifications.

Symptoms of U0327 2016 Toyota RAV4

  1. The alarm system may not arm or disarm properly.
  2. Keyless entry may not work as intended.
  3. The immobilizer system may prevent the vehicle from starting.
  4. The security light on the dashboard may illuminate.
  5. The vehicle may experience intermittent starting issues.

How to Fix U0327 2016 Toyota RAV4

  1. Begin by conducting a thorough inspection of the wiring harness and connectors leading to the VSCM. Repair or replace any damaged wiring or connectors.
  2. Use a diagnostic scan tool to attempt to communicate with the VSCM. If communication is not established, the VSCM may need to be replaced.
  3. Check for any software updates or reprogramming that may be available for the vehicle's onboard computer system.
  4. Clear the DTC and perform a test drive to ensure that the communication issue has been resolved.
  5. If the problem persists, consult a professional mechanic or dealership for further diagnosis and repair.

Cost to Fix U0327 2016 Toyota RAV4

The cost of repairing a U0327 DTC can vary depending on the specific cause of the communication issue. In general, the cost of replacing a VSCM can range from $200 to $600, including parts and labor. Additional costs may be incurred if wiring repairs or software updates are necessary. It is recommended to consult with a trusted mechanic or dealership to obtain an accurate cost estimate based on the specific circumstances of the vehicle. Labor rates at auto repair shops typically range from $80 to $150 per hour, but can vary based on location and other factors.

What does this mean?

Tech Notes for U0327 2016 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 2016 Toyota RAV4 Code

1. What are the common symptoms of OBDII code U0327 in a 2016 Toyota RAV4?

- Common symptoms include the illumination of the check engine light, issues with the security system, and difficulty starting the vehicle.

2. What does the OBDII code U0327 indicate in a 2016 Toyota RAV4?

- The code U0327 indicates that there is a communication error between the vehicle's onboard computer and the Vehicle Security Control Module.

3. What are the possible causes of the U0327 code in a 2016 Toyota RAV4?

- Possible causes include faulty wiring or connections, a malfunctioning security control module, software issues, or a damaged communication network.

4. How can I diagnose the U0327 code in my 2016 Toyota RAV4?

- Diagnosing the U0327 code typically involves using a diagnostic scanner to retrieve the code and then inspecting the vehicle's wiring, connections, and control modules for any issues.

5. Can I still drive my 2016 Toyota RAV4 with the U0327 code present?

- It is generally not recommended to drive the vehicle with the U0327 code present, as it can affect the vehicle's security system and potentially lead to other issues.

6. How can the U0327 code in a 2016 Toyota RAV4 be repaired?

- Repairing the U0327 code often involves checking and repairing any damaged wiring or connections, replacing the Vehicle Security Control Module if necessary, and ensuring the communication network is functioning properly.

7. Is it possible to reset the U0327 code in a 2016 Toyota RAV4 without repairs?

- While clearing the code with a diagnostic scanner may temporarily turn off the check engine light, it is important to address the underlying issue causing the code to prevent it from reoccurring.

8. Can a DIY enthusiast fix the U0327 code in a 2016 Toyota RAV4?

- Depending on the individual's skills and knowledge, some DIY enthusiasts may be able to diagnose and repair the U0327 code by following repair guides and using the necessary tools.

9. How much does it cost to repair the U0327 code in a 2016 Toyota RAV4?

- The cost of repairing the U0327 code can vary depending on the cause of the issue, the need for replacement parts, and labor costs. It is recommended to consult a professional for an accurate estimate.

10. Will the U0327 code in a 2016 Toyota RAV4 affect the vehicle's performance?

- While the U0327 code itself may not directly impact the vehicle's performance, unresolved communication issues between modules can lead to other operational problems and should be addressed promptly.

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