Having problems with your 2001 Dodge Intrepid ?

Another problem with my intrepid is that the obd II scan is recieving a no bus code. i took it to the dealer to try to fix it by re flashing/re programming it but they told me they couldnt do it because they couldnt communicate with the computer.. any help on what i could do please

Posted / edited by AnonymousUser on : 20-11-2017

Answers :

Most of the time a no buss comunication problem is due to a short to ground or a short to power on the buss wiring. The buss wiring is a pair of wires that connect all of the modules in the vehicle togather so they can all comunicate, kind of like a telephone wire set that allows calls from one module to the next. If you short it, then the electrical signal can't get to the destination module (no buss).
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\015\012The voltage should be about 2.5 volts. The voltage is usually created by one or more of the modules, so if one module fails but doesn't short to power or ground the other modules can still communicate with the scanner and tell the tech where the problems lies.
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\015\012 If it is 0 it is shorted to ground (this means the wire has shaffed and touched bare (ground) metal somewhere, or a module has malfunctioned internally and grounded the curcuit), if it has 12 volts, then it is shorted to power and this is usually a bad module.
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\015\012The best way to test is to actually unplug modules one at a time untill the buss comes to life again. Then you know which module it is. If it not a module then it is a bigger diag job.
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\015\012Just as a side note, most of the time we run into this type of problem it is usually the radio or the heater control head. To test these simply unplug them one at a time and see if the scanner now reads the buss. It can be other things but this is usually what we see.
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\015\012Good luck!
Repair Help & Product Troubleshooting for 2001 Dodge Intrepid

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