Retrieving Diagnostic Trouble Codes

NOTE: Diagnostic tests are written specifically for Chrysler's Diagnostic Readout Box (DRB-III) scan tool. A generic scan tool may also be used for system diagnostics, but may have limited diagnostic capability.

Ensure battery is fully charged. Connect scan tool to Data Link Connector (DLC). DLC is located below instrument panel, near steering column. If scan tool does not communicate with all modules, repair communication concerns See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. Using scan tool, retrieve and record DTCs. If any DTCs are retrieved, perform appropriate test procedure in accordance with DTCs retrieved. See SCAN TOOL DTC MESSAGES table. Once repairs are made, clear DTCs from PCM memory. See CLEARING DIAGNOSTIC TROUBLE CODES . On PT Cruiser, if no DTCs are retrieved, repair by symptom. See SYSTEM TESTS .

SCAN TOOL DTC MESSAGES

DTC ⁽¹⁾

Scan Tool Display

P0622

GENERATOR FIELD NOT SWITCHING PROPERLY

⁽²⁾P1478

BATTERY TEMPERATURE SENSOR VOLTS OUT OF LIMIT

⁽³⁾P1492

BATTERY TEMPERATURE SENSOR VOLTAGE TOO HIGH

⁽³⁾P1493

BATTERY TEMPERATURE SENSOR VOLTAGE TOO LOW

P1594

CHARGING SYSTEM VOLTAGE TOO HIGH

P1682

CHARGING SYSTEM VOLTAGE TOO LOW

⁽¹⁾	DTCs listed in this table are only testing procedures covered in this article. For a complete listing of PCM DTCs, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.

⁽²⁾	Applies to Concorde, Intrepid, LHS and 300M only.

⁽³⁾	Does not apply to Neon and PT Cruiser.