That's the computer the mechanics at the dealership use to talk back and forth with all the computers on the van. I have one because I can use it on all of my older cars. (I'll never buy anything newer than a '95 model). You can buy them over the internet right from the company that makes them but the kit costs over $6200.00. I can get you one from the dealership I used to work for but the cost is still way more than the cost of taking the van to the shop. You have to have enough use for it to make it be a good value. With an additional plug-in card it will also work on engine / emissions-related stuff on any brand of vehicle sold in the U.S.
The cruise control screen on the scanner will show all of the switches and whether they're pressed or released. Under the "reason for last cutout" it will list things like "vehicle speed too low", "ignition switch turned off", "brake pedal pressed", and "cruise control power switch turned off". Obviously the reason will be "ignition switch turned off" because that's what you did when you got to the repair shop. What you want to look for is if that reason comes back while you're driving on the highway and watching the readout. That would suggest an intermittent break in the power wire or overheated contacts or connector terminals in the ignition switch. If you leave the engine running when you get to the repair shop, the reason will be listed as "vehicle speed too low". You have to watch for the reason that shows up while you're on the highway. For a completely dead system regular electrical troubleshooting steps will still work. The scanner is a real time-saver for finding the cause of intermittent problems.
Monday, March 7th, 2011 AT 10:16 PM