Retrieving Diagnostic Trouble Codes: Notes
NOTE:
When using Chrysler's Diagnostic Readout Box (DRB-III) scan tool, the scan tool will be used to identify or display all DTCs for system diagnosis. When using generic scan tool, it will be necessary to use Malfunction Indicator Light (MIL) on instrument panel and generic scan tool to retrieve DTCs. Not all DTCs can be retrieved using generic scan tool and MIL. When using MIL to retrieve DTCs, some DTCs have more than one meaning. The MIL is unable to distinguish between different failures for a specified component. For example, there are 4 different possible failures for the downstream oxygen sensor system, but the MIL can only identify a downstream oxygen sensor failure by flashing a DTC 21, but the scan tool will be able to distinguish between the different failures.
NOTE:
When using generic scan tool, scan tool is not able to identify all possible DTCs. As an example, generic scan tool may not be able to identify or display a DTC for a malfunctioning A/C clutch relay circuit or A/C pressure sensor, but these DTCs will be displayed by the MIL.