2005 Mustang V6 Instrument Cluster and U1900 Help?
I have a 2005 V6 with instrument cluster issues. The tach is not reading anywhere near what is should be and neither is the fuel gauge. Most of the time the needle for the fuel gauge is not even in the range of the fuel gauge and the tach says I am idling past the red line. I have read the threads concerning problems with the stepper motors on the back on the instrument cluster and thats what I assumed the problem was, but when I took it to a mechanic just to see before sending the cluster in to a speedometer shop to replace the motors they ran a scan and the U1900 code came up. Is the problem with the instrement cluster causing the code and it is still likely the stepper motors are bad or is something else causing the instrument cluster problem and the stepper motors are fine?? Any help would be appreciated.
I also found this through google:
INTERMITTENT INSTRUMENT CLUSTER
OPERATION - INCLUDING GAUGES SWEEP/RESET - MULTIPLE WARNING LIGHTS ILLUMINATED AND/OR REVERSE LIGHTS STAY ON - VEHICLES BUILT BEFORE 2/17/2006
2005-2006 Five Hundred, Freestyle
This article supersedes TSB 06-6-2 to update the Service Procedure.
Some 2005-2006 Freestyle/Five Hundred/Montego vehicles built before 02/17/2006 may exhibit intermittent instrument cluster concerns with one of the following symptoms:
Very temporary intermittant condition at which time the Instrument Cluster pointers will intermittently "home" randomly after the ignition switch is in the run position. This is when all pointers travel to the low end of gauge travel, jitter for two to four seconds, and then recover. This condition may be more likely to occur as the vehicle drives over rough road surfaces.
During hard fault or prolonged intermittant condition, most functionality of the cluster will cease operation as soon as the issue is present, including all gages becoming inoperative.
While the fault exists, multiple warning lights will be illuminated, Cluster High Speed Controller Area Network (CAN) or Medium Speed CAN network communication with other module(s) will be inoperative, and reverse lights will stay on. If the fault discontinues, the tachometer and speedometer gauges will sweep and then reset. Look for U1900 diagnostic trouble code (DTC) in other electronic modules, as well as P0462/P2067 in the powertrain control module (PCM).
These symptoms could be the result of a defective solder joint on the printed circuit board in the instrument cluster.