U1000 NISSAN CAN Communication Line

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

Usually, the problem is poor harness ground connection.

There is a service bulletin for the following Nissan models with U1000 code:
- 2002-2006 Nissan Maxima
- 2004-2006 Nissan Titan
- 2004-2006 Nissan Armada
- 2002-2006 Nissan Sentra
- 2005-2006 Nissan Frontier
- 2002-2006 Nissan Altima
- 2005-2006 Nissan Xterra
- 2005-2006 Nissan Pathfinder
- 2004-2006 Nissan Quest
- 2003-2006 Nissan 350Z
- 2003-2006 Nissan Murano
Nissan Factory Service Bulletin Code U1000

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 does this mean?

When ECM is not transmitting or receiving CAN communication signal of OBD (emission related diagnosis) for 2 seconds or more.

Engine Light ON (or Service Engine Soon Warning Light)

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.

Each control unit transmits/receives data but selectively reads required data only.

U1000 2002 NISSAN ALTIMA SEDAN
U1000 2003 NISSAN ALTIMA SEDAN
U1000 2004 NISSAN ALTIMA SEDAN
U1000 2005 NISSAN ALTIMA SEDAN
U1000 2006 NISSAN ALTIMA SEDAN
U1000 2008 NISSAN ALTIMA SEDAN
U1000 2004 NISSAN MAXIMA
U1000 2005 NISSAN MAXIMA
U1000 2006 NISSAN MAXIMA
U1000 2007 NISSAN MAXIMA
U1000 2008 NISSAN MAXIMA
U1000 2005 NISSAN PATHFINDER
U1000 2006 NISSAN PATHFINDER
U1000 2007 NISSAN PATHFINDER
U1000 2008 NISSAN PATHFINDER
U1000 2009 NISSAN PATHFINDER
U1000 2010 NISSAN PATHFINDER
U1000 2011 NISSAN PATHFINDER
U1000 2012 NISSAN PATHFINDER
U1000 2008 NISSAN ROGUE
U1000 2009 NISSAN ROGUE
U1000 2002 NISSAN SENTRA
U1000 2003 NISSAN SENTRA
U1000 2004 NISSAN SENTRA
U1000 2005 NISSAN SENTRA
U1000 2006 NISSAN SENTRA
U1000 2007 NISSAN SENTRA
U1000 2008 NISSAN SENTRA
U1000 2009 NISSAN SENTRA
U1000 2007 NISSAN VERSA
U1000 2008 NISSAN VERSA
U1000 2009 NISSAN VERSA

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U1000 NISSAN - CAN Communication Line - Signal Malfunction

Possible causes

Tech notes

When is the code detected?

Possible symptoms

U1000 NISSAN Description

U1000 NISSAN Information for specific Nissan models

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U1000 NISSAN Comments

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