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2004 Chevy Venture -- radio locks with different speedometer?
My '04 chevy venture van needed the speedometer cluster replaced due to about half the background lights are burned out (they are soldered bulbs and cannot be replaced). I got another speedometer cluster from another 2004 venture at the salvage yard and when i installed it, all the lights and gauges work fine. ---- the problem is the radio quit working and says "CODE" (security code) and the radio is locked. The radio is not unplugged when the speedo is changed. ------ So, when i put the original speedometer cluster back in the van, the radio comes on and works fine. When i install the salvage yard cluster, the radio will not come on and is locked. I have tried this a couple of times, so i know the radio problem is related to the "strange" speedometer.
Any idea how to get around this problem or do i now need the "radio code" from the salvage yard van?
What is the relationship between the radio security and the speedometer cluster?
thanks
4 Answers
- ?Lv 78 years agoFavorite Answer
The security codes were meant to discourage stealing car stereos because a stereo from one car wouldn't work in another. Evidently the cluster determines the code number that the radio must match. Try to get either the owners manual or the vin of the vehicle your cluster was taken from. The code number would be written in the manual, or it can be looked up from the vin. Or you can get the radio from that van, or an aftermarket one.
- Anonymous8 years ago
The IPC displays vehicle speed as determined by the PCM. The IPC receives a class 2 message from the PCM.
The Vehicle Speed Sensor (VSS) discrete signal is pulled up to ignition voltage in the PCM.
The IPC uses the VSS data received from the PCM and a software program to determine the proper vehicle speed to display.
Since you replaced the IPC from another vehicle the PCM from your vehicle is confused meaning that you will need to call the dealership and see if they can re-flash your PCM with updated software.
If not then you will need to have your original IPC repaired so that your vehicle will work and run correctly.