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The ability to communicate within ICS is absolutely critical. To ensure efficient, clear communication, ICS requires the use of:

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Posted on Feb 07, 2014

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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LB7 01 duramax 4x4 . No start. no air in fuel system, flow test came back a little more than it should.


No ,you look more closely at the U 1000 code . Your vehicle control module's all communicate on a serial data network , all it takes is one bad module to corrupt the whole communication network an cause the vehicle not to start , run or anything . You don't say what make , modle or engine size . Doesn't sound like you know a whole lot about automotive electronic systems .
DTC U1000 and U1255
Circuit Description
Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for State of Health monitoring. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. When a module does not associate an identification number with at least one critical parameter within about five seconds of beginning serial data communication, DTC U1000 or U1255 is set. When more than one critical parameter does not have an identification number associated with it, the DTC will only be reported once.

You say you checked the grounds ,how about B+ voltage to the module's in question ? Will they communicate with your scan tool . The module which set U1000 or U1255 is the likely cause of the malfunction.

Nov 06, 2017 | Cars & Trucks

1 Answer

What are the probable causes of DTC U1000?


DTC U1000 and U1255
Class 2 Communication Malfunction , Do you know what class 2 serial data communication network is ? What module set this code an what kind of scan tool did you use to read this code .
Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the ID number of the module which sent the message for State of Health monitoring, Node Alive messages. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. When a module does not associate an ID number with at least one critical parameter within about 5.5 seconds of beginning serial data communication, DTC U1000 or U1255 is set. When more than one critical parameter does not have an ID number associated with it, the DTC will only be reported once.
The table below list the modules on the Class 2 Serial Data Circuit that will set a U1000 or U1255 and should be actively communicating the previously described messages on the Class 2 Serial Data Circuit.

Control Module

ID Number
Body Control Module (BCM)
064
Electronic Brake Control Module (EBCM)
040
Instrument Panel Cluster (IPC)
096
Radio
128
Powertrain Control Module (PCM)
016
Sensing and Diagnostic Module (SDM)
088
Diagnostic Aids
When a malfunction such as a open fuse to a module occurs while modules are communicating, a Loss of Communication DTC is set as current. When the modules stop communicating, ignition is turned off, the current Loss Communication DTC is cleared but the history DTC remains. When the modules begin to communicate again, the ignition is turned on, the module with the open fuse will not be learned by the other modules so U1000 or U1255 is set current by the other modules. If the malfunction occurs when the modules are not communicating, only U1000 or U1255 is set.
Test Description
The numbers below refer to the step numbers on the diagnostic table.

  1. A DTC U1001 - U1254 Lost Communications with with a history status may indicate the cause of U1000 or U1255.

  2. The modules not communicating are the likely cause of U1000 or U1255. The modules that are available on the class 2 serial data circuit are listed in the Circuit Description.

  3. The module which was not communicating due to a poor connection to the class 2 serial data circuit may have set DTC U1001 - U1254 Lost Communications with for those modules that it was monitoring.

  4. The modules which can communicate indicate the module which cannot communicate. You must clear the serial data communication DTCs from these modules to avoid future misdiagnosis.

  5. If all modules are communicating, the module which set U1000 or U1255 may have done so due to some other condition.

  6. The module which set U1000 or U1255 is the likely cause of the malfunction.

1
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Record the DTCs set in each module. If using a Tech 2, use the Class 2 DTC Check feature to determine which modules have DTCs set.
Did you record any DTCs in the range of U1001-U1254 with a history status?
Go to Diagnostic Trouble Code (DTC) List
Go to Step 2

2
  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to communicate with each module on the class 2 serial data circuit. If using a Tech 2, obtain this information using the class 2 Message Monitor feature.
  3. Record all of the modules communicating on the class 2 serial data circuit.
  4. Compare the list of modules which are communicating to the list given in Circuit Description.
Does any module on the class 2 serial data circuit not communicate?
YES - Go to Step 3
NO - Go to Step 12
Test the following circuits of the module that is not communicating for an open or short to ground:
?€¢
The battery positive voltage supply circuits


?€¢
The switched battery positive supply circuits


?€¢
The battery positive voltage output circuits


?€¢
The ignition voltage input circuits


?€¢
The ignition voltage output circuits

Refer to the following:
?€¢
Control Module References in Body Control System for the applicable schematic


?€¢
Circuit Testing in Wiring Systems


?€¢
Wiring Repairs in Wiring Systems

Did you find and correct the condition?

5

Important: Inspect all connectors in the serial data communications circuit.
Refer to the following:
?€¢
Data Link Connector Schematics


?€¢
Testing for Intermittent Conditions and Poor Connections in Wiring Systems


?€¢
Connector Repairs in Wiring Systems

  1. Turn OFF the ignition.
  2. Test the class 2 serial data circuits of the module that is not communicating for an open. Refer to the following:
?€¢
Data Link Connector Schematics


?€¢
Circuit Testing in Wiring Systems


?€¢
Wiring Repairs in Wiring Systems

Did you find and correct the condition?
Go to Step 8
Go to Step 6

6
Inspect the harness connector of the module that is not communicating for poor connections and terminal tension at the following circuits:
?€¢
The battery positive voltage input circuits


?€¢
The switched battery positive voltage supply


?€¢
The battery positive voltage output circuits


?€¢
The ignition voltage input circuits


?€¢
The ignition voltage output circuits


?€¢
The ground circuits


?€¢
The class 2 serial data circuits

Refer to the following:
?€¢
Control Module References in Body Control System for the applicable schematic


?€¢
Testing for Intermittent Conditions and Poor Connections in Wiring Systems


?€¢
Connector Repairs in Wiring Systems

Did you find and correct the condition?
Go to Step 8
Go to Step 7

7

Important: Perform the module programming or setup procedure if required.
Replace the module that is not communicating. Refer to Control Module References in Body Control System for the appropriate Repair Instructions for the module replacement.
Did you complete the replacement?
Go to Step 10
--

8

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Select the Display DTCs function for the module which was not communicating.
Does the scan tool display any DTCs which do not begin with a "U"?
Go to Control Module References in Body Control System for applicable Diagnostic System Check
Go to Step 9

9
Use the scan tool in order to clear the DTCs.
Did you complete the action?
Go to Step 10
--

10

Select the Display DTCs function for the modules which had U1000 or U1255 set as a current DTC.
Does the scan tool display DTCs which do not begin with a "U"?
Go to Control Module References in Body Control System for applicable Diagnostic System Check
Go to Step 11

11

Use the scan tool in order to clear the DTCs.
Did you complete the action?
System OK
--

12
Did you record any other DTCs for the modules which had U1000 or U1255 set as a current DTC?
Go to
Control Module References in Body Control System for applicable Diagnostic System Check
Go to Step 13

13

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Use the scan tool in order to clear the DTCs.
  4. Turn OFF the ignition for at least 5 seconds.
  5. Turn ON the ignition with the engine OFF.
  6. Select the Display DTCs function.
Does the scan tool display U1000 or U1255 set as a current DTC?
Go to Step 14
Go to Diagnostic Aids

14
Important: Perform the module programming or setup procedure if required.
Replace the module which had U1000 or U1255 set as a current DTC. Refer to
Control Module References in Body Control System for the appropriate Repair Instructions for the module replacement.
Did you complete the replacement?
System OK

Mar 12, 2016 | 2002 Pontiac Grand Am GT1

1 Answer

How can I obtain a user guide for Acatel optus one touch 250 P/N16513 corded phone?


Optus Network Approved modem and equipment list
If you are supplying your own DSL modem and/or telephone filters, you must ensure they meet the requirements
below before connecting them to the OptusNet DSL network. Connection of unapproved equipment is prohibited.
The modem list contains equipment that has been certified by manufacturers as having passed interoperability tests
r
equired for use on a DSL network. If your modem make and model isn't listed below,
call Optus Customer Service for further information on
1300 309 333.
F
ully supported by OptusNet DSL Broadband Customer Service, the OptusNet DSL Broadband Installation CD-ROM will automatically
c
onfigure this modem.
D-Link ADSL Modem 302G
The OptusNet DSL Broadband Installation CD-ROM provides detailed information to manually configure these modems, and OptusNet
DSL Broadband Customer Service will provide limited connection support for them.
(Equipment Certification date in brackets)
F
or modems and routers other than those above, OptusNet DSL Broadband provides only the network connection settings needed for
manual configuration. While this equipment can be used on the OptusNet DSL Network, no OptusNet DSL Broadband Customer Service
will be provided for connection configuration or equipment-related connection difficulties.
Alcatel SpeedTouch - 510 ADSL Modem (15.01.2003)
Alcatel SpeedTouch - 530 ADSL Modem (15.01.2003)
Alcatel SpeedTouch Pro - 4 port (10.09.2001)
Alcatel SpeedTouch Pro - Firewall (09.10.2001)
Alcatel SpeedTouch PCNIC (04.08.2000)
Alcatel SpeedTouch USB (04.08.2000)
Askey/Dynalink - ALE 070 (08.01.2001)
Askey/Dynalink - ALH 110 (21.03.2001)
Askey - RTA100 ADSL Modem (25.10.2002)
Billion Electric - BIPAC-711 CE ADSL Modem (25.10.2002)
Cisco WIC - 1ADSL-DG (30.06.2003)
Cisco 827 (19.02.2001)
Cisco 827H (11.07.2002)
Cisco 827-4V (19.02.2001)
Cisco 837 (01.04.2003)
Cisco SOHO77 (29.11.2001)
Cisco SOHO77H (11.07.2002)
Cisco SOHO97 (01.04.2003)
D-Link ADSL Modem - DSL 100D (08.08.2001)
D-Link ADSL Modem - DSL 500 (08.08.2001)
D-Link ADSL Modem - DSL 504 (08.08.2001)
Efficient Networks - C10 Communications - Speedstream 3060 (08.01.2001)
Efficient Networks - C10 Communications - Speedstream 4060 (08.01.2001)
Efficient Networks - C10 Communications - Speedstream 5260 (08.01.2001)
Efficient Networks - Siemens - Speedstream 5400 (07.04.2003)
Efficient Networks - C10 Communications - Speedstream 5660 (21.03.2001)
Efficient Networks - C10 Communications - Speedstream 5667 (10.09.2001)
Efficient Networks - C10 Communications - Speedstream 5861 (21.03.2001)
Juni NetAce - ADSL USB Modem (15.01.2003)
Juni NetElite 2000ES - ADSL 4 port Modem (15.01.2003)
Juni/Samsung SAM-215 USB Modem (18.07.2001)
Juni/Samsung SAM-335A Ethernet Modem (18.07.2001)
NetComm ADSL Modem - BusinessSmart (08.08.2001)
NetComm ADSL Modem - USB - NB1200 (27.08.2002)
NetComm ADSL Router Modem - NB1300 (20.11.2002)
Open 501r ADSL Router Modem (05.04.2002)
Alcatel - Central, Part No. 3AU 04804 AAAA
Alcatel - In-Line, Part No. 3AU 04805 ABAA
Askey/Dynalink - In-Line, DT60-002BA
C10 Communications - Dynamic - In-Line, C10290
C10 Communications - In-Line, C10611 & C10611T
C10 Communications - In-Line, C10645 & C10645T
C10 Communications - In-Line, C10610
Te
l
ephone Equipment - Central, TE-ACP20AUS01
C10 Communications - In-Line, C10211
C10 Communications - In-Line, C10111
C10 Communications - In-Line, C10145
C10 Communications - In-Line, C10245
D-Link - Central, DSL-10SP
D-Link - Central, DSL-10CF
D-Link - In-Line, DSL-10MF
Alcatel SpeedTouch Home
Alcatel SpeedTouch Pro
D-Link ADSL Modem - DSL 200
D-Link ADSL Modem - DSL 300
D-Link ADSL Modem - DSL 300+
D-Link ADSL Modem - DSL 302G
OptusNet DSL Broadband
Optus supplied modem
Optus preferred modems
List of all other certified modems/routers
List of certified filters/splitters
Information correct as at 2 February 2004.
1270049 06/04

Nov 12, 2014 | Cell Phones

1 Answer

2003chevy express 3500 W/6.0 cable throttle. Trouble codes U1000,U1016,U1041. Instrument cluster drops off,(gauges go dead) EBS light stays on,security lights also. Van had a remote starter alarm system...


U codes pertain to the class 2 serial data network . A dead module ,a short on the network will bring down the network - no communications between modules = no start problems .
Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for State of Health monitoring. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. When a module does not associate an identification number with at least one critical parameter within 5 seconds of beginning serial data communication, DTC U1000 or U1255 DTC is set. When more than one critical parameter does not have an identification number associated with it, the DTC will only be reported once. The class 2 serial data line on this vehicle is a star configuration. The following modules communicate on the class 2 serial data line:
• The body control module (BCM)
• The electronic brake control module (EBCM)
• The inflatable restraint sensing and diagnostic module (SDM)
• The instrument panel cluster (IPC)
• The powertrain control module (PCM)
• The radio
• The remote control door lock receiver (RCDLR)
• The vehicle communication interface module (VCIM)

Look's like a communication problem with the PCM & EBCM !
Powertrain Control Module (PCM)
U1016
Electronic Brake Control Module (EBCM)
U1041
Diagnostic Aids
• An intermittent open between a module and a star connector may cause this DTC to set.
• A poor connection at a module or a star connector may cause this DTC to set.
• An intermittent open in a star connector may cause this DTC to set.
• An open voltage or ground circuit to a module may cause this DTC to set.
• An internal module malfunction may cause this DTC to set.


012 GM Class II Communications

May 12, 2017 | Chevrolet Cars & Trucks

1 Answer

Im trying to write a code in matlab that accepts a character corresponding to the one above buttons(keypad-0-#) and genrates the appropriate dual-tone frequency


Provides an example Server / Client written in MATLAB that utilises the ability to call Java inline to perform message communication using TCP/IP.
Importantly it does not require any pre-compiled DLLs or force you to compile some MEX c-files. Nor does it require any additional toolboxes Its all contained within the .m files.
To use the example:
- Start 2 instances of MATLAB
- in the first execute the following:
message = char(mod(1:1000, 255)+1);
server(message, 3000, 10)
- in the second execute the following:
data = client('localhost', 3000)

Aug 20, 2013 | Computers & Internet

1 Answer

Failure to query from radius server


You have lost the authenticity and ability to communicate with the server. Connection cannot be reestablished with out proper introduction via the communication protocol. This must be done within 24 hours of the loss of communication whereby failure to connect promptly will result in permanent loss of server use from that day forward.

Mar 10, 2013 | Computers & Internet

1 Answer

What is the code reading u1000 traction


Hi there:
DTC U1000 Class 2 Data Link


These DTCs set when the control module does not receive a message that it was expecting from another control module, and does not know which control module did not send that message.


Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for State of Health monitoring. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. When a module does not associate an identification number with at least one critical parameter within 5 seconds of beginning serial data communication, DTC U1000 is set. When more than one critical parameter does not have an identification number associated with it, the DTC will only be reported once.



Hope helps.

Sep 27, 2012 | 2005 Chevrolet Equinox

1 Answer

I have a 2004 cadillac deville dhs has 12,000 miles on it was driving and the lights on started chiming and blinking and emergency flasher lights come on and blink hit the flasher button no help got a few...


DTC B2507
Seat Temperature and Mode Signal
DTC B1860
Driver Lumbar Vert Sensor CKT Malf
DTC C1295
Brake Lamp Switch Circuit Open
DTC C0665
Chassis Pitch Signal Circuit
DTC U1000 and U1255
Class 2 Communication Malfunction
DTC U1001-U1254
Lost Communications With ***
Circuit Description
Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message. These node alive messages are used for State of Health monitoring. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. When a module does not associate an identification number with at least one critical parameter within 5 seconds of beginning serial data communication, DTC U1000 or U1255 is set. When more than one critical parameter does not have an identification number associated with it, the DTC will only be reported once. The following modules communicate on the class 2 serial data circuit:
• Audio amplifier
• Cellular telephone module w/UV8
• Dash integration module (DIM)
• Digital radio receiver
• Driver door module (DDM)
• Driver door switch assembly (DDSA)
• Electronic brake control module (EBCM)
• Electronic suspension control module (ESC)
• Front passenger door module (FPDM)
• Inflatable restraint sensing and diagnostic module (SDM)
• Instrument panel cluster (IPC)
• Instrument panel integration module (IPM)
• HVAC control module - auxiliary
• Left middle door module (LMDM) w/V4U
• Left rear door module (LRDM)
• Memory seat module (MSM) w/A45
• Powertrain control module (PCM)
• Radio
• Rear integration module (RIM)
• Remote control door lock receiver (RCDLR)
• Right middle door module (RMDM) w/V4U
• Right rear door module (RRDM)
• Steering column module w/N37
• Theft deterrent control module
• Window switch - passenger front w/armored car
• Vehicle communication interface module (VCIM)
Your best bet ,take your vehicle to a qualified repair shop.

Nov 17, 2017 | 2004 Cadillac Deville

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