new code U1001????
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.)
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.)
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
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.)
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.)
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Kyle Lee Cleveland
6th Generation Maxima (2004-2008)
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Sep 28, 2015 09:01 PM




