Scan Tool

PURPOSE
A scan tool allows the technician to communicate with the Powertrain Control System, including On-board Diagnostics.

- Using a scan tool the technician can read system performance information stored in the vehicle system controllers.

- Displays the trouble codes stored in the various system controller memories.

- Allows the technician to run tests of computer-controlled vehicle systems.

- Leads the Technician through the diagnostic procedures, along with the instructions for the tests.

NOTE: Most test procedures in this reference were written for Chrysler's DRBII diagnostic read-out box. It should be possible to apply the same test procedures using an equivalent scan tool.

OPERATION
Scan tools communicate with control modules, through the CCD Bus (pronounced "see squared dee" bus).

USING A SCAN TOOL:

- Insert the proper cartridge into the scan tool.

- Plug the correct adapter cable into the diagnostic connector and attach the power supply cable to a +12 volt voltage source.

NOTE: For more information, SEE Powertrain Management/Computers and Control Systems/Testing and Inspection/Procedures.