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Trailblazer 2002 code u1000 - Cars & Trucks

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SOURCE: U1000

it is a communication error with the ecm from the ignition switch here is the code description

GM Number U1000

Type Network - Manufacturer Controlled DTC - Manufacturer Controlled

Description Class 2 Communication Malfunction Conditions
Cause
DTC B1327, U1300, U1301 and U1305 not current (any particular device on the Class 2 serial data circuit will support some subset of these codes), the ignition switch position requires serial data communication to occur, then at least one operating parameter has not been associated with an identification number within 5 seconds after beginning serial data communication (a default value is used)

Posted on Nov 14, 2008

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1 Answer

Scan code U1000


That is a communication bus problem code . Are you familiar with GM class 2 serial data communication network ? All the modules on the vehicle share information an they do it by the class 2 data bus.


2 UART Class 2 Bus Configuration

Dec 05, 2015 | 2006 Chevrolet Trailblazer

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U1000 code


You are loosing the % volt reference signal to the accelerator pedal postion sensor. Could be a faulty sensor or a wiring issue between the pcm and the app sensor on your gas pedal.

Jul 02, 2014 | 2002 Chevrolet TrailBlazer

1 Answer

Code u1000 code p0105 u1152


Codes U1000 & U1152 are related to the digital data bus communications, U1152 is specific for the HVAC control unit data bus. troubleshooting this will require a Tech II scan tool.
P0105 is related to the MAP sensor circuit.

Apr 27, 2014 | 2002 GMC Envoy

1 Answer

U1000 2002 altima 2.5


Do you know about serial data networks ? C.A.N - controller area network . Do you know what U - codes are about ? Download 2002 Nissan Altima LAN System Section LAN PDF Manual 60 Pages

Download 2002 Nissan Altima Body Control System Section BCS PDF Manual 22...

Here are sections of factory repair manual . Read up on C.A.N . U 1000 an U1001 one of the modules is having a problem on the wiring for the C.A.N bus is . You can check at the DLC with a volt meter .

Download 2002 Nissan Altima Emission Control System Section EC PDF Manual...

CAN COMM CIRCUIT U1000 1000*6 - - × EC-137 CAN COMM CIRCUIT U1001 1001*6 - - × EC-137

Apr 03, 2017 | Nissan Altima Cars & Trucks

1 Answer

2003 gmc envoy u1000 code & code p0014


Stuck or faulty variable cam timing solenoid

Feb 13, 2013 | 2003 Chevrolet TrailBlazer

1 Answer

2003 trailblazer codes U-1000, B- 1850, Y- 1160, what do they mean?


Don't see these too often, must of been a dealer or a good mechanic with some expensive equipment....

U1000 is loss of communication with an unknown module...could be any module like TCCM.
B1850 is Drivers Lumbar Horizontal sensor Circuit Malfunction...in your seat.
Y1160, I have no clue what this is.

I would take it to a mechanic that has a Tech II (or equivalant) diagnostic machine, this will pinpoint your problem with at least the U1000...will show which module is not communicating. Would be able to tell you what the Y1160 is also. Good luck!

Feb 14, 2011 | 2003 Chevrolet Trailblazer Ext

1 Answer

U1000


U1000 - CAN Communication Line Signal Malfunction

Causes:
- Harness or connectors (CAN communication line is open or shorted)
- Faulty Engine Control Module (ECM)

Solutions:
- Poor harness ground connection

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

The service bulletin suggest cleaning engine and body harness ground connection to repair problem.

Feb 14, 2011 | Nissan Versa Cars & Trucks

2 Answers

Engine codes


sometimes coming data,but the every error comunication,for the scannner
rpm up and down same the lightgauge,low high,codes u 1001 1000

Jan 15, 2009 | 2002 Nissan Altima

1 Answer

U1000


it is a communication error with the ecm from the ignition switch here is the code description

GM Number U1000

Type Network - Manufacturer Controlled DTC - Manufacturer Controlled

Description Class 2 Communication Malfunction Conditions
Cause
DTC B1327, U1300, U1301 and U1305 not current (any particular device on the Class 2 serial data circuit will support some subset of these codes), the ignition switch position requires serial data communication to occur, then at least one operating parameter has not been associated with an identification number within 5 seconds after beginning serial data communication (a default value is used)

Oct 29, 2008 | 2003 Chevrolet TrailBlazer

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