AutoCodes – Infiniti – U1000 2004 Infiniti G35

U1000 2004 Infiniti G35 Code - CAN Communication Line Signal Malfunction

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 Controller Area Network (CAN) communication harness is open or shorted, Faulty Engine Control Module (ECM), Poor harness ground connection. 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: U1000 2004 Infiniti G35 indicates CAN Communication Line Signal Malfunction.
Common causes: Common causes include Controller Area Network (CAN) communication harness is open or shorted, Faulty Engine Control Module (ECM), Poor harness ground connection.
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 8,295

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 29, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U1000 2004 Infiniti G35 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 the Engine Control Module (ECM) is not transmitting or receiving CAN communication signals for 2 seconds or more.

OBDII Code U1000 2004 Infiniti G35 - CAN Communication Line Signal Malfunction - AutoCodes.com — U1000 2004 Infiniti G35 Code - CAN Communication Line Signal Malfunction

What does this mean?

What are the Possible Causes of the DTC U1000 2004 Infiniti G35?

Controller Area Network (CAN) communication harness is open or shorted
Faulty Engine Control Module (ECM)
Poor harness ground connection.

How to Fix the DTC U1000 2004 Infiniti G35?

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

There is a factory service bulletin for the 2004 Infiniti G35:
2004 Infiniti G35 Factory Service Bulletin Code U1000

The service bulletin suggests cleaning engine and body harness ground connection to repair the problem.
- Clean/re-tighten ECM ground connections.
- Clean/re-tighten negative battery cable body connection and battery post connection.
- If needed, clean and ensure good contact between the steering member assembly and the left side instrument stay assembly.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1000 2004 Infiniti G35 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 U1000 2004 Infiniti G35 code?

Need more information on how to fix the U1000 2004 Infiniti G35 code? Get Access to Factory Service Manuals

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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 U1000 2004 Infiniti G35 Code

1. What does the OBDII code U1000 mean for a 2004 Infiniti G35?

The U1000 code indicates a CAN communication line signal malfunction in the vehicle's network.

2. What are common symptoms of a U1000 code in a 2004 Infiniti G35?

Common symptoms may include intermittent or complete loss of communication with various control modules, erratic behavior of electronic components, and warning lights on the dashboard.

3. What are the possible causes of a U1000 code in a 2004 Infiniti G35?

Potential causes include damaged wiring or connectors in the CAN network, faulty control modules, a short circuit in the network, or a problem with the power supply to the network.

4. How can I diagnose a U1000 code in my 2004 Infiniti G35?

Diagnosis typically involves inspecting the wiring and connectors in the CAN network, checking for any shorts or open circuits, testing the voltage supply to the network, and using a diagnostic scan tool to communicate with the control modules.

5. Can I drive my 2004 Infiniti G35 with a U1000 code?

It is not recommended to drive the vehicle with an unresolved U1000 code, as it can lead to further damage and unsafe driving conditions due to potential communication issues with critical vehicle systems.

6. How can I repair a U1000 code in my 2004 Infiniti G35?

Repairing a U1000 code may involve repairing or replacing damaged wiring or connectors, replacing faulty control modules, addressing any short circuits in the network, or ensuring a proper power supply to the CAN network.

7. Will resetting the trouble codes clear the U1000 code in my 2004 Infiniti G35?

While resetting the trouble codes may temporarily clear the U1000 code, it is important to diagnose and repair the underlying issue causing the code to prevent it from reoccurring.

8. Can a DIY enthusiast fix a U1000 code in a 2004 Infiniti G35?

Depending on the individual's skill level and access to the necessary tools, a DIY enthusiast may be able to diagnose and repair a U1000 code in a 2004 Infiniti G35, but complex electrical issues may require professional assistance.

9. How much does it cost to repair a U1000 code in a 2004 Infiniti G35?

The cost of repairing a U1000 code 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 recommended to obtain a diagnosis from a professional technician to determine an accurate cost estimate.

10. Can a U1000 code in a 2004 Infiniti G35 cause other problems if left untreated?

If left untreated, a U1000 code can potentially lead to communication failures between critical control modules, affecting the performance and safety of various vehicle systems in the 2004 Infiniti G35. It is important to address the issue promptly to avoid further complications.