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Signal bus - Cars & Trucks

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What problem involves the signal bus?

Posted on Oct 11, 2013

Testimonial: "I'm looking for details on the protocol for the 2000 Dodge Intrepid (SAE j 1850 single wire, VPW)."

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    ????? ????? Oct 11, 2013

    Description of the protocol on the link below. Whether it is suitable for a Dodge Intrepid 2000https://www.google.ru/url?sa=t&rct=j&q=&...

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Posted on Jan 02, 2017

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What is a no bus signal on my cluster board on a 04 jeep liberty? It's also gives me a message code j1850.


That's usually caused by a shorted module somewhere on the data bus. Get a wiring diagram and unplug all the modules. Then plug in one at a time until the data bus goes down. That'll be the bad module

Jul 20, 2017 | Jeep Cars & Trucks

2 Answers

Why would my truck just shut down in the middle of driving and all the gauges just turn off?


Grounds. Check or replace the battery to body ground. Could be the ignition switch also. There is a lot to answer for this. year make and model helps.

Apr 08, 2016 | Cars & Trucks

1 Answer

Controller Area Network (CAN) B bus?????????????????


Could be a wiring problem or a module on the bus . This best left to the dealer . How to Diagnose Controller Area Network CAN

Dec 16, 2015 | 2006 Jeep Liberty

1 Answer

00 Dodge Durango keeps stalling, getting no bus signal and transmission light


had the same issue 4months ago, it end up being the pcm, i hve a 2000 dodge durango as well

Aug 25, 2012 | 2000 Dodge Durango

1 Answer

No bus signal on a 99 Dodge Durango and wont start.


A no BUS signal is a sure give away that your computer has an internal failure and needs to be replaced with a new or re-manufacterd one. This is a common problem with Chrysler still today on there newer models.

Aug 13, 2011 | 1999 Dodge Durango

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

1 Answer

Dakota - 2001, started, died and won't start. all dash indicators light as normal except odometer says "No Bus."


Hi, if odometer say no bus you are loosing your bus signal some were ,with out a bus signal the car not going to run the bus signal runs to every module on your truck. This could be as easy as a blow en fuse to a wire shorted out or a bad module . Depends on your know how around cars . If your not sure you should take to local shop or dealer. If i can help you further just re post.
Thanks dodge tec

Jan 02, 2011 | 2001 Dodge Dakota

1 Answer

My 2000 Dodge Ram 1500 stalls out while I'm driving and a No Bus signal comes on the odometer reading. It starts again usually after a few minutes but how can I fix this?


i had a jeep that flashed that and wouldnt start i ended up replacing the pcm(engine computer) after checking the wire harness and connection if im not mistaken the pcm is in a place where it can be exposed to water so it might have water damage hard to tell without the truck but the bus signal is a state of health from the computer like a self diagnostic of it so without the signal it wont run hope this helps good luck

Aug 22, 2010 | 2000 Dodge Ram 1500 Truck

2 Answers

Dodge caravan 2002 error code P1687


The code P1687 (CAN data bus, instrumentation-no signal) possible cause- wiring, instrumentation control module mechanical.

Sep 05, 2009 | 2002 Dodge Caravan

1 Answer

Odometer reads no bus


check bulkhead connecter for corrosion, cluster is your body controll module, losing signal to fuel pump module , and pcm, thios is a communication issue, volt meter wil help, back probe diagnostic connecter, pin 7, white wire, to see if signal is there, GOOD LUCK RDJRP

Jul 16, 2009 | 1999 Dodge Ram

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