AutoCodes – Toyota – U0327 2017 Toyota RAV4

U0327 2017 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 2017 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 328

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 2017 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 2017 Toyota RAV4 - Lost Communication with Vehicle Security Control Module - AutoCodes.com — U0327 2017 Toyota RAV4 Code - Lost Communication with Vehicle Security Control Module

What does this mean?

What are the Possible Causes of the DTC U0327 2017 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 2017 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 2017 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 2017 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 2017 Toyota RAV4 Code

1. What does the OBDII code U0327 mean for a 2017 Toyota RAV4?

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

2. What are common symptoms of the U0327 code in a 2017 Toyota RAV4?

Common symptoms of the U0327 code include issues with starting the vehicle, security system malfunctions, and warning lights on the dashboard.

3. What are possible causes of the U0327 code in a 2017 Toyota RAV4?

Possible causes of the U0327 code include faulty wiring or connections, a malfunctioning Vehicle Security Control Module, or a problem with the vehicle's onboard computer.

4. How do I diagnose the U0327 code in my 2017 Toyota RAV4?

Diagnosing the U0327 code typically involves using a diagnostic scanner to retrieve the code and then inspecting the wiring, connections, and modules related to the vehicle security system.

5. Can I still drive my 2017 Toyota RAV4 with the U0327 code present?

It is not recommended to drive your vehicle with the U0327 code present, as it can lead to potential security system issues or starting problems.

6. How can I repair the U0327 code in my 2017 Toyota RAV4?

Repairing the U0327 code may involve repairing or replacing damaged wiring, fixing faulty connections, replacing the Vehicle Security Control Module, or reprogramming the vehicle's onboard computer.

7. Is it possible to reset the U0327 code in a 2017 Toyota RAV4 without fixing the underlying issue?

Resetting the U0327 code without addressing the underlying issue will likely result in the code reappearing once the vehicle is driven and the problem persists.

8. Can a DIY enthusiast fix the U0327 code in a 2017 Toyota RAV4?

DIY enthusiasts with knowledge of automotive electronics and wiring may be able to diagnose and repair the U0327 code, but it is recommended to seek professional help for accurate diagnosis and proper repair.

9. How much does it cost to repair the U0327 code in a 2017 Toyota RAV4?

The cost of repairing the U0327 code can vary depending on the root cause of the issue, parts needed for repair, and labor costs. It is best to consult a mechanic for an accurate estimate.

10. How can I prevent the U0327 code from appearing in my 2017 Toyota RAV4?

Regular maintenance, checking and cleaning connections, and addressing any security system issues promptly can help prevent the U0327 code from appearing in your 2017 Toyota RAV4.