Scanners are "bidirectional", meaning they receive and display information from the computers, and you can talk back to them and command them to do things. For an injector or an ignition coil, Chrysler calls that their "Actuator Test Mode", (ATM). Other brands of scanners do the same thing but don't give it a fancy name.
I have a Chrysler DRB3 scanner for all of my vehicles, and a couple of older DRB2s for my older vehicles. On those, I select "Engine Computer", "Actuator Test Mode", "Inputs and Outputs", "Ignition Coil", from drop-down menus. The scanner will command the Engine Computer to fire the ignition coil about once every two seconds. That lets you work in that circuit without having to crank the engine.
If you would have enough use of a scanner, you can find DRB2s on eBay for less than a hundred bucks. They require a cartridge specific to each vehicle. There could be a dozen cartridges to cover every model and year from 1983 through 1995, but instead, look for a '94 or '95 "Supercartridge". That one cartridge covers almost all the years and models back to '83.
The DRB3 can be found on eBay too. A lot of independent shops bought them years ago because with an extra plug-in card, they will do emissions-related stuff on any brand of car sold in the U.S. Starting with '96, models. It became obsolete on some Chrysler models in 2004, and on all of them by 2008. You might find one of these at an independent shop that wants to buy a newer scanner. The complete kit used to cost $6200.00. The price is a lot better now on eBay, but these only worked back to '96 or '98 models, depending on when you bought it. There is a "Supercard 2" that lets it work on '94 to '97 models, and a "Supercard 1" that lets it work on '83 through '93 models. Those cards used to cost $440.00 each, but now they're real cheap. Either one just plugs in on the bottom of the scanner similar to stuffing a floppy disc into an old computer. You can leave it plugged in all the time. The Supercard 2 is the one that lets you work on other car brands, but it only reads live sensor data and diagnostic fault codes. It lets you do everything on Chrysler products.
A lot of people get by without ever owning or using a scanner, but once you play with it and see what it can do, you'll feel like a carpenter without a level if you don't have one. He'll get the job done, but it will take a lot longer.
Tuesday, August 29th, 2017 AT 7:05 PM