U1000 Infiniti 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 Infiniti 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.
Code U1000 Infiniti Description
What are the Possible Causes of the DTC U1000 Infiniti?
- 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 Infiniti?
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.
Code Tech Notes
- 2002-2004 Infiniti I35
- 2002-2006 Infiniti Q45
- 2004-2006 Infiniti QX56
- 2003-2006 Infiniti FX
- 2003-2006 Infiniti G35
- 2003-2004 Infiniti M45
- 2006 Infiniti M
Infiniti 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.
There is another Infiniti service bulletin with tips to diagnose the U1000 code:
Infiniti Service Bulletin Code U1000 Diagnostic Tips and Guidelines
User Submitted Video
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U1000 Infiniti 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 Infiniti Models
- U1000 2003 Infiniti G35 — CAN Communication Line Signal Malfunction
- U1000 2004 Infiniti G35 — CAN Communication Line Signal Malfunction
- U1000 2005 Infiniti G35 — CAN Communication Line Signal Malfunction
- U1000 2006 Infiniti G35 — CAN Communication Line Signal Malfunction
Frequently Asked Questions about U1000 Infiniti Code
1. What does the OBDII code U1000 for Infiniti mean?
The U1000 code indicates a CAN communication line signal malfunction in an Infiniti vehicle.
2. What are the common symptoms of a U1000 code in an Infiniti?
Common symptoms of a U1000 code may include issues with the transmission shifting erratically, the engine stalling, or various warning lights illuminating on the dashboard.
3. What can cause the U1000 code to trigger in an Infiniti?
The U1000 code in an Infiniti is often triggered by problems with the CAN communication network, such as wiring issues, loose connections, or faulty control modules.
4. How serious is a U1000 code in an Infiniti?
A U1000 code in an Infiniti should be taken seriously as it can impact the overall performance and safety of the vehicle. It is recommended to address this issue promptly.
5. How can I diagnose a U1000 code in my Infiniti?
Diagnosing a U1000 code in an Infiniti typically involves using a professional OBDII scanner to read the code, checking the CAN communication network for faults, and inspecting wiring and connections for any issues.
6. Can I continue driving my Infiniti with a U1000 code?
It is not recommended to continue driving your Infiniti with a U1000 code, as it can lead to further damage and potential safety hazards. It is best to address the issue as soon as possible.
7. Are there any DIY repair tips for fixing a U1000 code in an Infiniti?
While some basic troubleshooting like checking for loose connections or damaged wiring can be done DIY, it is often recommended to have a professional mechanic diagnose and repair the underlying cause of the U1000 code.
8. How much does it cost to fix a U1000 code in an Infiniti?
The cost of fixing a U1000 code in an Infiniti can vary depending on the exact cause of the issue. It is advisable to get a diagnostic from a mechanic to determine the specific repairs needed.
9. Can a U1000 code be a false alarm in an Infiniti?
While rare, a U1000 code can sometimes be triggered by temporary glitches or communication errors. It is still important to have the vehicle checked by a professional to rule out any serious issues.
10. How can I prevent a U1000 code from occurring in my Infiniti?
Regular maintenance, checking the vehicle's wiring and connections, and addressing any warning signs promptly can help prevent a U1000 code from occurring in your Infiniti.
Discuss the causes and fixes for U1000 Infiniti OBDII Code
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I've replaced the spark plugs on a infinity g35 2006 and it started missing on cylinders 4 and 6. Now it has a u 1000 and a random misfire.
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Unfortunately there are many things that could cause that code, but you could start by checking the harness ground connections to the engine and body. Please see "Tech Notes" above and the bulletin
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SOLVING A U1000 CODE 2004 INFINITY QX56
David Burbee 09-5-2016
Vehicle showing a U1000 with a P0456...with a no-start condition...
Disconnect Battery...Connect ohm meter, set on low scale, across Data Link Connector pins 14 and 6...Correct reading must be 60 ohms; meter read 75 ohms...The IPD module Connector E-17 across pins 39 and 40; normal reading is 120 ohms... ECM Connector E-10 across pins 96 and 97; normal reading is also 120 ohms...These two ohmic values are in parallel, which accounts for a normal reading of 60 ohms (test sheet Normal Resistance – CAN Harness)...
Connector E-17 pins 39 and 40 were corroded causing ohmic value to read 626 ohms....Value calculated from faulty reading of 75 ohms at DLC pins 14 and 6...
Removed IPD from vehicle and cleaned all contacts on all connectors...Installed IPD and connectors...Re-read DLC pins 14 and 6; now reads 60 ohms...Re-connected battery; vehicle started...No codes...
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I have an fx35 2006 model with so many problems, and when i scanned the car it displayed the U1000 can com code.
The front wiper stopped working except the rear one, the parking light stays on and i cant switch it off with the switch (i have changed the switches but didnt fix it), the head light doesnt come on and it doesn't flashes when i turn the switch, the AC and radiator fans kick on when the car start knob is on AC without starting the engine, the orange light on the ciggar lighter doesnt go off, it stays on all the time, the rear glass defogger doesnt work anymore. With all these faults i suspect the BCM or ECM. I want to clean all the grounds but i dont know where all are located. -
There are too many ground to show here. Please go to Infinitihelp.com (http://x.infinitihelp.com/f... and download the "Power Supply 2006 Infiniti FX 35/45" section of the service manual. Download it's free with registration.
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Hola, tengo una ifiniti con el mismo error que algo para resolverlo por favor.
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Comience por inspeccionar las tierras de los harness y las conexiones de la batería. Limpie las conexiones de las tierras y luego borrele el codigo.
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