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What parts for low speed communication bus

Hard to start engine

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Combine with other mix measurement

Posted on Jan 29, 2014


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2008 Milan, code U0073, where do I begin in order to fix the problem? It also has code P0020

U0073 Control Module Communication Bus Off Digital Signal Processor REFER to Section 418-00 . U0073 Control Module Communication Bus A Off EATC Module REFER to Section 418-00 . U0073 Control Module Communication Bus A Off SJB REFER to Section 418-00 . U0073 Control Module Communication Bus A Off TCM (FNR5 Speed Transaxle) REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual. U0073 Control Module Communication Bus A Off TCM (6 Speed Transaxle) REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
Your best bet , take it to a qualified repair shop . You do not have the knowledge or diagnostic test equipment to diagnose this . Do you know what C.A.N. - controller area network is ?
Communications Network Vehicle communication utilizes both medium and high speed controller area network (CAN) communications. CAN is used for many modules to communicate with each other on a common network. CAN in-vehicle networking is a method for transferring data among distributed electronic modules via a serial data bus. Without serial networking, intermodule communication requires dedicated, point to point wiring resulting in bulky, expensive, complex, and difficult to install wiring harnesses. Applying a serial data network reduces the number of wires combining the signals on a single network. Information is sent to the individual control modules that control each function.
The vehicle has 2 module communication networks:
  • Medium speed (MS) CAN
  • High speed (HS) CAN
Both networks are connected to the data link connector (DLC). This makes diagnosis and testing of these systems easier by allowing one scan tool to be able to diagnose and control any module on both networks from one connector. The DLC can be found under the instrument panel between the steering column and the audio unit.

016 CAN Communications

P0020 - Intake Camshaft Position Actuator Circuit/Open (Bank 2) Description: See the description for DTC P0010. Possible Causes: See the possible causes for DTC P0010. Diagnostic Aids: See the diagnostic aids for DTC P0010. Application Key On Engine Off Key On Engine Running Continuous Memory All GO to Pinpoint Test HK .

Nov 29, 2017 | Cars & Trucks

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What do I do when I put a new pcm on my 2000 dodge trk and it started up then killed it and tried to crsnk it the asd bussed and knw all my gauges quit and says now no buss

"NO BUS" means that the communication system between the computers has stopped working ! The gauges info come's from the PCM - engine computer over the bus , serial data communication network . VSS - vehicle speed sensor , ECT - engine coolant temp sensor , oil pressure sender etc.. are inputs to the engine computer . When replacing computers , most of the time they need flash programming . Dealer only in most cases . With a J2534 programming tool . Real World Reflashing with Dave Hobbs

Nov 24, 2016 | Dodge Cars & Trucks

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My dash in my 2006 canyon isn't working, can't find the problem

Did you have the vehicle hooked to a factory scan tool to see if it will talk to the scan tool . Your instrument cluster is electronic an has a microprocessor inside , it is connected on the serial data communication network or bus as it is called . It's hard to find a problem when you don't know how it works >
All the gauges in the instrument cluster receive there info from the ECM - BCM engine an body computers on the data bus .
The instrument panel cluster (IPC) displays the vehicle speed based on the information from the engine control module (ECM). The IPC receives a serial data message from the BCM indicating the vehicle speed.
PRND321 Display
The instrument panel cluster (IPC) displays the selected gear position as determined by the engine control module (ECM). The IPC receives a serial data message from the ECM indicating the gear position. The PRND321 display blanks if:
The ECM detects a malfunction in the transmission range switch circuit.

The IPC detects a loss of serial data communications with the BCM.

The BCM detects a loss of serial data communications with the ECM.

This you should take to a ASE qualified repair facility or the dealer ! It is possible to short out the data bus an bring down the system , meaning nothing on the vehicle will work !

Sep 24, 2015 | Cars & Trucks

2 Answers

Where is the speedometer cable located on a 1994 buick lesabre?

There no cable its a speed sensor located on the trasmission end passager side just beside the cv joint the video is and example

Apr 06, 2015 | 1994 Buick LeSabre

3 Answers

2002 SANTA FE Diesel car won't start code U0002 AND U0009 WHAT IS THIS FAULT

what is the probable cause of error code U0019 hyundai starex 2002

Aug 17, 2012 | 2002 Hyundai Santa Fe

1 Answer

U0019 error code on hyundai 55

The u0019 code is a communication failure code on the low speed bus line. You will want to have all modules scanned to see which one is not setting the same code. The module on the low speed bus that is not setting the code is the problem most likly. This particular code is indicating there is an open/short to ground or B+ on the bus line. You will have to find a good electrical shop to diagnose the problem.
Good luck.

Nov 28, 2011 | 2005 Hyundai Tucson

1 Answer

Code u0008 high speed can communication bus (-) high

U codes are reserved for future systems and may be proprietary to the manufacturer.

The CAN Bus allows 12 Volts, or other potential, power to be distributed around the vehicle (or system) on a single power rail with local actuators connecting the power to each application as needed. Vehicle functions such as temperatures , alarms or the positions of switches are monitored by sensors connected to the bus and the controller can direct the actuators to initiate the appropriate response as required.

Two variants are available to suit different transmission rates. A high speed (1 MBaud) bus is used for rapid control devices for operations such as engine management and vehicle stability and motion control. For simple switching and control of functions such as lighting, windows, mirror adjustment and instrument displays a low speed (100 KBaud) bus is used.

The CAN bus was designed to provide secure communications in the very harsh operating environments with high levels of electrical noise which are found in automotive systems.

The communications protocol defines the following:

  • Method of addressing the devices connected to the bus
  • Data word format (The message)
  • Priority setting
  • Transmission sequence
  • Control signals
  • Error detection
  • Error handling or correction
  • Transmission speed

The message data, the control signals and the error correction are contained in a data frames of equal length which are transmitted sequentially over the transmission channel.

Definitively, you need visit the dealer to know excalty is you have any problem with the software in your modules os any loss harnesses or wires there.

Additional details, onyl with the manufactured.

Hope this helps.

Jan 30, 2011 | 2002 Hyundai Accent

2 Answers

Wat is a code p 1698

p169 is "no ccd bus mesages recieved" that means the engine OR trans computer has not seen any communication (called a BUS) from the other modules on the communication bus if the instrument cluster is not working then it is the source of the code if the car wont shift then there is a communication issue with the trans computer if it wont start then there is a problem with the engine computer communication this is usually set by a bad instrument cluster

May 18, 2010 | 1998 Dodge Caravan

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