5th Generation Maxima (2000-2003) Learn more about the 5th Generation Maxima, including the VQ30DE-K and VQ35DE engines.

new code U1001????

Old Apr 19, 2005 | 08:24 AM
  #1  
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new code U1001????

any one know what this code is or where i can find out it said it was a body code???
Old Apr 19, 2005 | 08:46 AM
  #2  
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From: Fairfax, VA
From the FSM:

DTC U1000, U1001 CAN COMMUNICATION LINE

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 electonic 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.

Detecting condition:

ECM cannot communicate to other control unit.
ECM cannot communicate for more than the specified time.

Possible causes:

Harness or connectors
(CAN communication line is open or shorted.)
Old Aug 30, 2013 | 03:47 PM
  #3  
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Where can I find the CAN harnest to find out if I have a short .,, I read codes u1000 and u1001 and both show my 5th gen max won't go over 30 mph and feels like my tranny is going on me I need sum help any 1 thank you
Old Aug 30, 2013 | 04:21 PM
  #4  
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you are in limp mode
Old Aug 31, 2013 | 05:19 AM
  #5  
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So what does that meen am I done do I need a new tranny ? Should I go to the dealer to check it out
Old Aug 31, 2013 | 05:21 AM
  #6  
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Originally Posted by knight_yyz
you are in limp mode
So what am I suppose to do how to I clear it or have my car back to normal ?? Any help thank greatly
Old Aug 31, 2013 | 05:28 AM
  #7  
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Originally Posted by Puppetmaster
From the FSM:

DTC U1000, U1001 CAN COMMUNICATION LINE

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 electonic 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.

Detecting condition:

ECM cannot communicate to other control unit.
ECM cannot communicate for more than the specified time.

Possible causes:

Harness or connectors
(CAN communication line is open or shorted.)
How do I clear these code or get it fixed and do you know what can cause this or why my car feels like my tranny is going on me .,,,, changed alternator and over night my 5th gen feels funny and slip light and trac control light won't go off on top I read codes u1000 and u1001 also p1610 any help with this I don't want to drop for a tranny
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