AutoCodes – Toyota – U0163 Toyota

U0163 Toyota Code - Lost Communication with Navigation 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 Navigation Control Module, Navigation 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: U0163 Toyota indicates Lost Communication with Navigation Control Module.
Common causes: Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Navigation Control Module, Navigation 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 6,588

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 U0163 Toyota 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 Navigation Control Module has not been received.

OBDII Code U0163 Toyota - Lost Communication with Navigation Control Module - AutoCodes.com — U0163 Toyota Code - Lost Communication with Navigation Control Module

What does this mean?

What are the Possible Causes of the DTC U0163 Toyota?

Faulty Controller Area Network (CAN) Communication System
Faulty Navigation Control Module
Navigation Control Module harness is open or shorted
Navigation Control Module circuit poor electrical connection

How to Fix the DTC U0163 Toyota?

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 U0163 Toyota 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.

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Information for Specific Toyota Models

U0163 2013 Toyota RAV4 — Lost Communication with Navigation Control Module
U0163 2014 Toyota RAV4 — Lost Communication with Navigation Control Module
U0163 2015 Toyota RAV4 — Lost Communication with Navigation Control Module
U0163 2016 Toyota RAV4 — Lost Communication with Navigation Control Module
U0163 2017 Toyota RAV4 — Lost Communication with Navigation Control Module
U0163 2018 Toyota RAV4 — Lost Communication with Navigation Control Module

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 U0163 Toyota Code

1. What are the common symptoms of OBDII code U0163 in a Toyota related to the Navigation Control Module?

The common symptoms include loss of communication with the navigation system, malfunctioning GPS, inoperative touchscreen controls, and error messages on the display.

2. What are some possible causes of the U0163 code in a Toyota indicating Lost Communication with Navigation Control Module?

Possible causes include a faulty navigation control module, issues with the wiring or connectors, software glitches, or a malfunction in the vehicle's network communication system.

3. How can I diagnose the U0163 code in my Toyota when it indicates Lost Communication with Navigation Control Module?

Diagnosis typically involves checking the wiring and connectors related to the navigation control module, inspecting for any visible damage, testing the module itself, and using a diagnostic tool to scan for specific communication errors.

4. Are there any DIY repair tips for addressing the U0163 code in a Toyota due to Lost Communication with Navigation Control Module?

DIY repair tips may include checking and securing the wiring connections, resetting the navigation system, updating software if applicable, and ensuring all other electronic components in the vehicle are functioning properly.

5. Can the U0163 code in a Toyota related to Lost Communication with Navigation Control Module be fixed without professional help?

While some basic troubleshooting steps can be taken by DIY enthusiasts, resolving complex issues with the navigation control module may require the expertise of a professional mechanic or technician.

6. Is it safe to continue driving my Toyota with the U0163 code indicating Lost Communication with Navigation Control Module?

It is generally safe to drive the vehicle with this code, but it is recommended to address the underlying issue promptly to ensure proper functioning of the navigation system and other related electronic components.

7. How much does it typically cost to repair the U0163 code in a Toyota due to Lost Communication with Navigation Control Module?

The cost of repair can vary depending on the specific cause of the issue, the extent of the repairs needed, and whether any parts need to be replaced. It is advisable to obtain quotes from different repair shops for an accurate estimate.

8. Will resetting the OBDII code U0163 in a Toyota fix the issue of Lost Communication with Navigation Control Module?

Resetting the code may temporarily clear the error message, but it will not fix the underlying problem causing the lost communication with the navigation control module. Proper diagnosis and repair are necessary for a long-term solution.

9. Can extreme weather conditions or environmental factors contribute to triggering the U0163 code in a Toyota related to Lost Communication with Navigation Control Module?

Extreme temperatures, moisture, or other environmental factors can potentially affect the performance of electronic components, including the navigation control module, and may lead to communication issues triggering the U0163 code.

10. How long does it typically take to repair the U0163 code in a Toyota caused by Lost Communication with Navigation Control Module?

The repair time can vary depending on the complexity of the issue, availability of parts, and the expertise of the technician. Simple fixes may take a few hours, while more involved repairs could require leaving the vehicle at the repair shop for a day or longer.