Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2002 Chrysler Neon LE, StandardFACTORY OEM SERVICE PROCEDURE
Using Scan Tool
- Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool manufacturer's instructions, read and record DTC (generic scan tool) or DTC message (DRBIII(R)), and Freeze Frame data.
- If scan tool will not power up, check for loose cable connections or bad cable. If cable connections and cable are okay, measure voltage at DLC fused B+ terminal. Voltage should be at least 11.0 volts. If voltage is not as specified, check wiring circuit and fuse No. 21 (20-amp) in Power Distribution Center (PDC).
- If DRBIII(R) displays USER-REQUESTED COLD BOOT error or USER-REQUESTED WARM BOOT error, or any other error message, record entire displayed error message and follow DRBIII(R) manufacturer's instructions.
- If DRBIII(R) 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 appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
- If any DTCs are displayed, perform appropriate diagnostic test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS
. After repair is complete, clear DTCs from PCM memory and perform appropriate verification test. See VERIFICATION TESTS
. If no DTCs are displayed, go to one of the following:
- For Air Conditioning (A/C) system problems, see appropriate A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING.
- For Anti-Lock Brake System (ABS) problems, see appropriate ANTI-LOCK article in BRAKES.
- For charging system problems, see appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.
- For control module communication problems, see appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
- For Speed Control (S/C) problems and servicing information, see appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT.
- For starting or driveability problems, see TROUBLE SHOOTING - NO CODES - CARS - EXCEPT SEBRING COUPE & STRATUS COUPE article for diagnosis by symptom.
- For transmission electronic controls system problems, see appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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