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, AutomaticFACTORY OEM SERVICE PROCEDURE
Checking PCM Power & Ground Circuits
NOTE:
After making any repairs, perform POWERTRAIN VERIFICATION TEST
under VERIFICATION TESTS.
- Turn ignition off. Disconnect 40-pin Powertrain Control Module (PCM) C1 and C2 connectors. Using a 12-volt test light connected to ground, probe PCM harness connector C2 terminal No. 42, fused B+ circuit. If test light illuminates, go to next step. If test light does not illuminate, repair fused B+ circuit. See POWER DISTRIBUTION in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
- Turn ignition on. Using a 12-volt test light connected to ground, probe PCM harness connector C1 terminal No. 20, fused ignition start/run circuit. If test light illuminates, go to next step. If test light does not illuminate, repair fused ignition start/run circuit. See POWER DISTRIBUTION in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
- Turn ignition off. Using a 12-volt test light connected to battery voltage, probe ground circuits at PCM harness connector C1 terminal No. 47 and PCM harness connector C2 terminals No. 10 and 50. If test light illuminates, test is complete. If test light does not illuminate, repair ground circuits. See GROUND DISTRIBUTION in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
Factory Service Tools
Use the Manual With the Right Hardware
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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.