AutoCodes – Toyota – U0327 2016 Toyota RAV4

U0327 2016 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 2016 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 598

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 2016 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 2016 Toyota RAV4 - Lost Communication with Vehicle Security Control Module - AutoCodes.com — U0327 2016 Toyota RAV4 Code - Lost Communication with Vehicle Security Control Module

What does this mean?

What are the Possible Causes of the DTC U0327 2016 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 2016 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 2016 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 2016 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 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.