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PDA Automotive Palm Pilot - $25 (Las Cruces)
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Transaction takes place in public
There are lots of OBD II scan tools out there, and even some that have a screen large enough to do PID (data item) graphing. In most cases, though, you've got to download to a desktop PC to get a large enough screen. And although graphing also can be done on a laptop for portability, not every shop has one. The Injectoclean CJ-II, based on using Palm or Visor PDAs (personal data assistants), is a pocket-size alternative that many shops will find a great addition to the toolbox.
First of all, it's a true OBD II tester in that it's able to do OBD II generic testing on all four protocols (SAE and ISO), including pulling trouble codes and live data (PIDs), freeze frame snapshots, Clear Codes and readiness status reports. And OBD II enhanced (with bidirectional capability) is an available option for Ford. The PDA display isn't huge, but at 23/8x21/4 inches, it's certainly bigger than the two- or four-line displays of some scan tools. A nice touch is that the definition of each term is right on the display, so you don't have to go to a reference book.
The CJ-II can graph two PIDs simultaneously, so if you want to take it on the road and grab, say, MAF and rpm, or TPS, it's a simple job with a tool you can tape to the steering wheel and read easily.
The PDA can be loaded with the CJ-II software from a disk included with the OBD II cable, and universal smart connector, which includes the OBD II module. Updates can be downloaded from any Internet-capable PC to the PDA using cradle or cable (setup depending on however the PDA communicates with a PC).