Retrieving DTCS
NOTE:
Self-diagnostic tests are written specifically for Chrysler's Diagnostic Readout Box-III (DRB-III) scan tool. If using a generic scan tool, ensure scan tool is OBD-II certified. A generic scan tool may not be capable of performing all necessary test functions.
NOTE:
If MIL does not come on for 3 seconds and then go off, bulb may be defective, or problem may exist on circuit (CCD Bus) between PCM and instrument cluster. If problem exists with CCD Bus, this problem may be displayed when using scan tool to retrieve DTCs.
NOTE:
Ensure battery is fully charged before proceeding with test.
- Attempt to start engine. Turn ignition off. Diagnostic Trouble Codes (DTCs) can only be retrieved using scan tool. Connect scan tool to Data Link Connector (DLC). DLC is located below instrument panel near steering column. See Figure .
- Turn ignition on, with engine off. Using scan tool manufacturer's instructions, read and record DTC (generic scan tool) or DTC message (DRB-III scan tool), and freeze frame data.
- If scan tool displays NO RESPONSE, perform TEST NS-SEL: NO START SELECTION MENU . If scan tool will not power up, check for loose cable connections or bad cable. If cable connections and cable are okay, check voltage on DLC power terminal. See WRANGLER wiring diagram in WIRING DIAGRAMS article. Voltage should be at least 11 volts. If voltage is not as specified, check wiring circuit and necessary fuses.
- 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 for information on correcting error.
- If scan tool displays BUS FAILURE, indicating either a scan tool or BUS circuit failure, to diagnose and correct these conditions, see VEHICLE COMMUNICATIONS article in ACCESSORIES & EQUIPMENT.
- If DTCs are displayed, perform appropriate test(s) listed under SELF-DIAGNOSTIC TESTS. See DTC MESSAGES & CODES
table in DIAGNOSTIC TROUBLE CODE (DTC) DEFINITIONS. Once all repairs are made, ensure DTCs are erased from PCM memory. See CLEARING DTCS. If no DTCs are displayed, refer to one of the following:
- For driveability problems, perform TEST NTC-1A: NO TROUBLE CODE TEST MENU .
- For no-start problems, perform TEST NS-SEL: NO START SELECTION MENU .
- For speed control problems and servicing information, see CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT.
- For charging system problems, see GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.