AutoCodes - OBDII Code List - U1000 2004 NISSAN ALTIMA SEDAN

U1000 2004 NISSAN ALTIMA SEDAN - CAN Communication Line - Signal Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

U1000 2004 NISSAN ALTIMA SEDAN Possible Causes

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

How do I fix code U1000 2004 NISSAN ALTIMA SEDAN?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
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Tech Notes

There is a service bulletin for the 2004 Nissan Altima:
2004 Nissan Altima Factory Service Bulletin OBDII Code U1000

Usually, the problem is poor harness ground connection. The service bulletin suggests cleaning engine and body harness ground connection to repair the problem. Loosen the ground connectors clean them with sandpaper on the connector side and body side and retighten the bolts back.

Cost of diagnosing the U1000 2004 NISSAN ALTIMA SEDAN code

Labor: 1.0

The cost of diagnosing the U1000 2004 NISSAN ALTIMA SEDAN code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

U1000 2004 NISSAN ALTIMA SEDAN Description

The Controller Area Network (CAN) is a serial communication line for real-time applications. 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 the required data only.
The Diagnostic Trouble Code (DTC) sets when the Engine Control Module (ECM) is not transmitting or receiving CAN communication signals of OBD (emission-related diagnosis) for 2 seconds or more.
OBDII Code U1000 2004 Nissan Altima Sedan - CAN Communication Line - Signal Malfunction - AutoCodes.com

More Information

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