Retrieving Diagnostic Trouble Codes
- Turn ignition off. Diagnostic Trouble Codes (DTC) can only be retrieved using a scan tool. Connect scan tool to Data Link Connector (DLC). DLC is located under left side of instrument panel, near steering column. See Fig 1. Turn ignition on. If scan tool powers up, go to 4. If scan tool will not power up, go to next step.
- Check for loose cable connections or bad cable. If cable connections or cable are defective, repair or replace components as necessary, and recheck for DTCs, then go to step 4. If cable connections and cable are okay, go to next step.
- Measure voltage between ground and terminal No. 16 (Pink wire) at DLC. Voltage should be 11 volts or more. If voltage is less than 11 volts, check wiring between DLC and junction block. Repair wiring as necessary. Also check fuse No. 19 (10-amp) in junction block. Junction block is located behind end cover on left side of instrument panel.
- If scan tool displays USER-REQUESTED COLD BOOT error or USER-REQUESTED WARM BOOT error, or any other error message, record entire displayed error message and follow scan tool manufacturer's instructions. If scan tool does not display an error message, go to next step.
- If scan tool displays NO RESPONSE, perform TEST NTC-2: NO RESPONSE FROM PCM (SCI ONLY) . If scan tool does not display NO RESPONSE, go to next step.
- If scan tool does not display a bus failure, go to next step. If scan tool displays a bus failure error message, this indicates a scan tool failure or a bus circuit failure. To diagnose and repair bus circuit failure, see COMMUNICATIONS under SYSTEM TESTS in BODY CONTROL MODULES - CONCORDE, INTREPID, LHS & 300M article in ACCESSORIES & EQUIPMENT.
- Using scan tool manufacturer's instructions, read and record DTCs (generic scan tool) or DTC message (DRBIII scan tool), and freeze frame data. If any DTCs are displayed, perform appropriate diagnostic test. See DTC MESSAGES & CODES table under DIAGNOSTIC TROUBLE CODE DEFINITIONS. After repair is complete, clear DTCs from PCM memory and perform appropriate verification test. If no DTCs are displayed, go to one of the following:
- For driveability problems, go to TEST NTC-1: NO TROUBLE CODES TESTS MENU under DIAGNOSTIC TESTS.
- For no-start problems, perform TEST NS-SEL: NO START TEST SELECTION under DIAGNOSTIC TESTS.
- For speed control problems and servicing information, refer to appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT.
- For charging system problems, refer to appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.
- For transmission electronic controls system problems, refer to appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS.
Courtesy of DAIMLERCHRYSLER CORPORATION