Engine-Codes - Nissan - U1000 2011 Nissan Pathfinder

U1000 2011 Nissan Pathfinder Code - CAN Communication Line Signal Malfunction

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- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the Code U1000 2011 Nissan Pathfinder?

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

How to Fix the U1000 2011 Nissan Pathfinder Code?

Start by checking 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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Code U1000 2011 Nissan Pathfinder Tech Notes

There is a service bulletin for the 2011 Nissan Pathfinder:
2011 Nissan Pathfinder 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.

What is the Cost to Diagnose the Code U1000 2011 Nissan Pathfinder?

Labor: 1.0

The cost to diagnose the U1000 2011 Nissan Pathfinder code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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What are Code U1000 2011 Nissan Pathfinder Possible Symptoms?

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

What Does the U1000 2011 Nissan Pathfinder Code Mean?

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.

U1000 2011 Nissan Pathfinder Code - CAN Communication Line Signal Malfunction

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