u1000 class 2 serial communication problem

U1000 Class 2 Communication Malfunction U1001 Loss of serial communications for class.

Each control unit transmits/receives data but selectively reads required data only. Mass or volume air flow circuit range/performance problem (bank 2). 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. 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). When more than one critical parameter does not have an identification number associated with it, the DTC will only be reported once. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. When a module does not associate an identification number with at least one critical parameter within 5 seconds of beginning serial data communication, Diagnostic Trouble Code (DTC) U1000 is set. Modules connected to the class 2 serial data circuit monitor for serial data communications during normal. U1000 Nissan Description CAN (Controller Area Network) is a serial communication line for real time application. If needed, clean and ensure good contact between the steering member assembly and the left side instrument stay assembly. Clean/re-tighten negative battery cable body connection and battery post connection. Clean/re-tighten ECM ground connections.

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 Service bulletin suggests cleaning engine and body harness ground connection to repair the problem. Tech notes Usually, the problem is poor harness ground connection.

U1000 class 2 serial communication problem