There are two different problems first off the speed indicator dial will go haywire it flickers and changes by itself as you drive or while its idling.When you turn the heater blower on the car acts up...
Wow a lot going on there it seems. Well for starters 96 was the year all vehicles made in and after that year had to be obdII (onboard diagnostic 2) compliant, which means a common scanner communication point, location (within reason) and a set of global obd2 codes for all makes and models to help with emission standards and diagnostics of such systems. A late 95 may have called a 96 and be only obd1 and another 96 be obdII possibly causing discrepancies in the wiring, or even simpler a different transmission option, etc. Secondly vehicle speed sensors are normally magnetic induction sensors on late model vehicles, but can be hall effect or mechanical. Each one produces a different signal, for example a magnetic induction sensor will produce an analog signal to the pcm or tcm converted inside to digital signal so the computer understands and can intepret the information. A hall effect will produce a digital signal and send it to the pcm or tcm for direct interpretation. Normally input and output shaft speed sensors are used to tell the tcm what gear the transmission is in when compared to one another against a chart in its memory. On some models they will have vehicle speed sensors as well that will tell the pcm the vehicle speed which will relay that information to the instrument cluster to operate the speedo head. If you have a scan tool to read datastream values would be great to monitor the readings from the speed sensors while driving, but you could check the sensors signal with a dvom on a hoist. Also i have seen a couple of mid to late 90's intrepids melt the connections inside the interior fuse panel on the drivers side, causing many erractic things to occur. Ensure all the fuses and panel inself is in tact. got to go for now, hope this will help, any more questions let me know.
Jan 26, 2010 |
Dodge Intrepid Cars & Trucks