Question about Cars & Trucks

Open Question

What is a u7300 control module bus A ? - Cars & Trucks

Posted by on

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

2005 volvo xc90 will not stay running, it is giving a code of U0073 generic control module communication bus"a" off. .we have put in new crank sensor. the maf sensor is not the problem


Do you know what a serial data communication network is ? All the control modules on your vehicle share info on it . It stead of hard wiring all the componets on the vehicle they use control modules and a data network . U codes are problem codes assoicated with these networks . U0073 generic control module communication bus"a"OFF Has nothing to do with engine sensors ! Condition
The control modules transmit and receive information via a standardized serial communication method - CAN (Control Area Network).
The diagnostic trouble code (DTC) is stored if the control module detects that:
  • The control module does not have contact with the controller area network (CAN).
  • Incorrect value runs longer than 10 seconds.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
  • Starting the control module's CAN communication.
Note!The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met. In the event of system communication problems, it is not possible to communicate with the control module. Therefore it will only be possible to read off the fault if it is intermittent. Substitute value
  • None.
Possible source
  • Open-circuit in terminals.
  • Damaged Parking Assistance Module (PAM).
Fault symptom[s]
  • Parking Assistance System, malfunction
  • Information lamp is on
  • Message in information display

A shorted module will cause the data bus to short and cause no start condition . You best bet , take it to a qualified repair shop . How to Diagnose Controller Area Network CAN

Jan 06, 2017 | 2005 Volvo XC90

1 Answer

2006 Dodge Dakota 4x4 SLT Body Control Module location


I have a manual for a 2004 Dakota that is probably similar to the 2006 electrically. Dodge never called it a Body Control Module; earlier models did have the Central Timer Module (CTM) which functioned like Body Control Modules in other manufacturers vehicles.
In 2004, the CTM was replaced by the Integrated Power Module (IPM), which consists of the Front Control Module and Power Distribution Center, and is located next to the battery on the left inner fenderwell (the Front Control Module is underneath the Power Distribution Center, where you will find relays and fuses). There are several other modules which control various functions, and they communicate with each other through the Programmable Communication Interface (PCI) bus circuit, also called J1850.
The Front Control Module controls all exterior lights, except brake lights and turn signals, and the windshield wiper functions. Other modules (PCM, TCM, antilock brakes, heated seats, instrument cluster, power locks/power windows/power mirrors, etc) control other functions, but all communicate through the PCI bus.

Nov 08, 2016 | 2006 Dodge Dakota

1 Answer

What and where is the can c bus on a 2007 dodge ram 1500 5.7. Code u0001?


Can bus C is a serial data communication network that certain modules talk ,share information on ! There can be two or even three different bus networks - A , B , C . One being faster in speed of data transfer then the other ! There are two wire data bus's an single wire ones ! CAN- Controller Area Network is a two wire bus an the wires are twisted together to shield from noise interference . You code U0001 is a communication problem on the bus , a module isn't communicating ! How to Diagnose Controller Area Network CAN This is something best left to a trained technician !

Sep 02, 2015 | Dodge Cars & Trucks

2 Answers

Code u7300 in my 2010 equinox what is the cause and how to fix it?


This code refers to a communications lost problem on the CAN line. The electronic control module is missing communication from one or more other modules. It can be set when replacing a battery or low battery voltage is present ( running accessories with key on engine off ). It can also set from poor/loose connections. Have the code cleared and see if it returns. If it does, further diagnostics will be required to effectively diagnose it

Jul 28, 2015 | Cars & Trucks

1 Answer

My 2002 put cruiser reads no bus in ?the odomator display even with ?the key off and out also dash lights flash off and on


The no bus message means one of the control modules isn't communicating on the data bus or isn't working ! I don't know how many modules yours has but ,if it has antilock brakes an I know it has air bags , an PCM - engine transmission computer , the instrument cluster has a control module an all these modules are on a serial data communication network , there share information ! The speedometer gets it's info from the VSS vehicle speed sensor through the PCM over the bus to the instrument cluster same with coolant temperature ! So I would have it taken to the dealer if you don't know about this stuff ! Need special tools to test this 2004 Chrysler Sebring No Bus message in cluster testing

Apr 15, 2015 | 2002 Chrysler PT Cruiser

1 Answer

I have 08 ford escape when I try to scan it said no communication


Do you know about communication networks or serial data communications on vehicles , these let the scan tool communicate with the different modules on the vehicle ! Newer vehicles have several, PCM - powertrain control module , Anti-theft module , Air bags , antilock brakes , Body control module or in the case of ford a smart junction box . an some others !
Communications Network Vehicle communication utilizes both International Standards Organization (ISO) 9141 and controller area network (CAN) communications. ISO 9141 is used for diagnostic use only, and 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 3 module communication networks:
  • ISO 9141
  • Medium speed (MS) CAN
  • High speed (HS) CAN
All 3 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 the 3 networks from one connector. The DLC can be found under the instrument panel between the steering column and the audio unit.
HS-CAN Network Operation
The HS-CAN network communicates using bussed messages. The HS-CAN network uses an unshielded twisted pair cable, data bus (+) and data bus (-) circuits. In addition to scan tool communication, this network allows sharing of information between all modules on the network.
The HS-CAN is a high speed communication network used for the following modules:
  • ABS module
  • 4WD control module (if equipped)
  • Instrument cluster
  • PCM
  • MS-CAN Network Operation
    The MS-CAN network communicates using bussed messages. The MS-CAN has an unshielded twisted pair cable, data bus (+) and data bus (-) circuits. In addition to scan tool communication, this network allows sharing of information between all modules on the network.
    The MS-CAN is a medium speed communication network used for the following modules:
    • Instrument cluster
    • SJB
    HS-CAN Network
  • What type of scan tool are you using ? or are you using a code reader ?

  • What
Computer No Communication Troubleshooting by Wells Saturn Toyota Echo No Communication Case Study

Mar 18, 2015 | 2008 Ford Escape

1 Answer

I have a 03 Saturn Vue that has electrical issues sometimes it dose not start and I have to remove the ignition and main battery fuses to get it to start. Up cluster works when wants along with dash lights...


Sounds like you mite need an ignition switch. But just to be sure you should have the modules scanned for codes , especially the body control module ! Are any warning lights staying on ,check ENG , A symbol of a wrench lit up or a picture of a lock symbol ? This car has a few electronic control modules and there all talk back an forth on a serial data bus . This car has two !
Class 2 Data Line
Saturn utilizes the class 2 communications system for most vehicle system controllers that must exchange data and commands. Class 2 data is pulse width modulated. The pulse width modulation of class 2 data allows better utilization of the data line.
The messages carried on class 2 data streams are also prioritized. This means if 2 devices try to communicate on the data line at the same time, only the higher priority message will continue. The device with the lower priority message must wait. The modules on the class 2 data line are:
?€¢
Body Control Module (BCM)


?€¢
Power Steering Control Module (PSCM)


?€¢
Instrument Panel Cluster (IPC)


?€¢
Inflatable Restraint Sensing and Diagnostic Module (SDM)


€¢
Vehicle Communication Interface Module (VCIM), if equipped Controller Area Network (CAN)
The controller area network (CAN) serial data line is a high speed serial data bus used to communicate traction information between the electronic brake control module (EBCM), the engine control module (ECM), the body control module (BCM), and the transaxle control module (TCM). Typical data-transmission speeds must be high enough to ensure that the required real-time response is maintained.
The addressing scheme employed with CAN assigns a label to every message, with each message receiving a unique identifier. The identifier classifies the content of the message, such as engine speed.
Each module processes only those messages whose identifiers are stored in the module's acceptance list. This is CAN's form of message filtering.
The identifier labels both the data content and the priority of the message being sent. Each module can begin transmitting its most important data as soon as the bus is unoccupied. When more than one module starts to transmit simultaneously, the message with the highest priority is assigned first access. A module responds to failure to gain access by automatically switching to receive mode. The module then repeats the transmission attempt as soon as the bus is free again.
You need to have a professional scan tool to check for codes in the modules other than the engine ecm module. I have seen a bad instrument cluster short the bus and cause the vehicle shut down . hope this helps ! First place to start is checking for codes in all the modules. If there is a problem with one of them ,it usually sets a code in one of the other modules !

Jan 07, 2015 | 2003 Saturn VUE

1 Answer

What is the most likely cause an error code u1900 in a 2008 ford explorer xlt 4wd


Do you know what a serial data network is ? With all the computers car makers put on thier cars these day's they need a communication network for them to talk ,share info. on etc. U codes are codes for the network . A module could be down ,could be a wiring problem . A shorted module or bus wire can bring down the whole vehicle. Could cause the vehicle not to start ,systems not to function . How did you pull this code ,with what scan tool or code reader ? Did it come from the PCM - engine computer ? Need a up scale professional scan tool to check all module's on the vehicle , need to pin point the module that is causing the problem .
U1900 CAN Communication Bus Fault - Receive Error 4WD Control Module REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault - Receive Error ABS Module REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault - Receive Error DSM REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault - Receive Error Instrument Cluster REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault - Receive Error Occupant Classification Sensor Module REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault - Receive Error Parking Aid Module REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault - Receive Error RCM REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault - Receive Error Retractable Running Board Module REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 .
016 CAN Communications

SECTION 418-00: Module Communications Network 2007 Explorer/Mountaineer/Explorer Sport Trac Workshop Manual DESCRIPTION AND OPERATION Procedure revision date: 08/02/2006 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.
Network Topology

Module Name Network Type Termination Module Anti-lock brake system (ABS) module HS-CAN No Audio control module (ACM) MS-CAN No Digital versatile disc (DVD) player (if equipped) MS-CAN No Driver seat module (DSM) (if equipped) MS-CAN No Electronic automatic temperature control (EATC) module (if equipped) MS-CAN No Four wheel drive (4WD) control module (if equipped) HS-CAN No Instrument cluster (IC) (gateway module) HS-CAN
MS-CAN Yes
Yes Occupant classification sensor (OCS) module HS-CAN No Parking aid module (PAM) (if equipped) MS-CAN No Powertrain control module (PCM) HS-CAN Yes Power running board (PRB) module (if equipped) MS-CAN No Restraints control module (RCM) HS-CAN No Satellite digital audio radio system (SDARS) (if equipped) MS-CAN No Smart junction box (SJB) MS-CAN Yes Transmission control module (TCM) (if equipped) HS-CAN No
MS-CAN Network Operation
The MS-CAN network communicates using bussed messages. The MS-CAN has an unshielded twisted pair cable, data bus (+) and data bus (-) circuits. In addition to scan tool communication, this network allows sharing of information between all modules on the network.
The MS-CAN is a medium speed communication network used for the following modules:
  • SJB
  • Audio unit
  • Instrument cluster
  • DSM (if equipped)
  • DVD player (if equipped)
  • EATC module (if equipped)
  • Parking aid module (if equipped)
  • Satellite audio receiver (if equipped)
  • Power running board module (if equipped)
HS-CAN Network Operation
The HS-CAN network communicates using bussed messages. The HS-CAN network uses an unshielded twisted pair cable, data bus (+) and data bus (-) circuits. In addition to scan tool communication, this network allows sharing of information between all modules on the network.
The HS-CAN is a high speed communication network used for the following modules:
  • PCM
  • TCM (if equipped)
  • RCM
  • ABS module
  • Instrument cluster
  • Occupant classification sensor module
  • 4WD control module (if equipped)
Network Termination
The CAN network uses a network termination circuit to improve communication reliability. The network termination of the CAN bus takes place inside the termination modules by termination resistors. Termination modules are located at either end of the bus network. As network messages are broadcast in the form of voltage signals, the network voltage signals are stabilized by the termination resistors. Each termination module has a 120 ohm resistor across the positive and negative bus connection in the termination module. With 2 termination modules on each network, and the 120 ohm resistors located in a parallel circuit configuration, the total network impedance, or total resistance is 60 ohms.
Network termination improves bus message reliability by:
  • stabilizing bus voltage.
  • eliminating electrical interference.
Gateway Module
The instrument cluster is the gateway module, translating HS-CAN to MS-CAN and vice versa. This information allows a message to be distributed throughout both networks. The instrument cluster is the only module on this vehicle that has this ability.

Aug 30, 2017 | 2008 Ford Explorer 2WD

1 Answer

What does no bus mean on the odometer


No bus means the bus is not operating properly. It means no communication between the modules inside your jeep. All modules inside the jeep (A/C control, radio, onboard computer or trip computer, body control, etc) communicate with each other by means of a wire called bus. Check that wire.

Jun 24, 2014 | 2001 Jeep Grand Cherokee

1 Answer

My problem is in the gear box (U0103 COMM. SHEFT) the car model 2005 chasis number (1J4GS48KX5C682794) so please what is the problem? Many thanks.


Diagnostic Fault Code (DTC) U0103 is a communications fault.

The Transmission Control Module (TCM) receives information from the Engine, Anti-Lock Brake Systen and the Electronic Gear Shift Control modules over the CAN C bus. (CAN = Cable Area Network)
The CAN C bus is a high speed communications bus that allows real-time control capability between various control modules. Most messages are sent every 20 mSec, this means critical information can be share between multiple modules almost instantaneously. The CAN C bus is a two-wire bus with a CAN (+) and a CAN (-) circuit.
To reduce the potential of radio and other electrical noise interference, the CAN Bus circuit is manufactured using a twisted pair configuration within the wiring harness.
Diagnostic Test Codes (DTCs) with the prefix of "U" are communications faults. The types of DTCs indicate that one or more of the modules within the CAN network is not communicating properly with the rest of the modules.
For this vehicle, DTC P0103 indicates that the Transmission Shift Module is having difficulty communicating on the CAN network.
The network connections as well as power and ground circuits to the Transmission Shift Module must be verified for proper operation. This includes accessing the network with a scan tool that has the capability of two-way communications with all of the modules on the CAN network.
Please note that MOST generic OBD code readers do not have this capability.

Nov 26, 2011 | 2005 Jeep Grand Cherokee

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

26 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

76070 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Randy Ohler

Level 3 Expert

14585 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...