Grand Cherokee 2WD V8-4.7L VIN N (2000)
Symptoms of Individual module failure could include any one or more of the above. The difference would be that at least one or more modules
would respond to the DRBIII (R).
Diagnosis starts with symptom identification. If complete PCI Bus Communication Failure is suspected, begin by identifying which modules the
vehicle is equipped with and then attempt to get a response from the modules with the DRBIII (R). If any modules are responding, the failure is
not related to the total bus, but can be caused by one or more modules PCI circuit or power supply and ground circuits. The DRBIII (R) may
display "BUS +/- SIGNAL OPEN" or "NO RESPONSE" to indicate a communication problem. These same messages will be displayed if the
vehicle is not equipped with that particular module. The CCD error message is a default message used by the DRBIII (R) and in no way indicates
whether or not the PCI bus is operational. The message is only an indication that a module is either not responding or the vehicle is not equipped.
Refer to the application table for a list of standard and optional modules and their respective Diagnostic Junction Port pin assignments.
