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.
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HOMESERVICE MANUALSCHRYSLER2003300M V6-3.5L VIN MREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSBY SYMPTOMRECALLSCAMPAIGN - POWERTRAIN CONTROL MODULE REPLACEMENTSERVICE PROCEDUREA. REPLACE PCM - LH VEHICLES
2003 Chrysler 300M V6-3.5L VIN M
A. Replace PCM - LH Vehicles
2003 Chrysler 300M V6-3.5L VIN MSECTION A. Replace PCM - LH Vehicles
1. Disconnect the negative battery cable.
NOTE:
To enhance customer satisfaction, remember to reset the clock when you have completed the service procedure.
2. Remove the speed control servo and set it aside.
3. Remove the washer fluid bottle filler neck bolt and set the filler neck aside.
4. Disconnect the four (4) PCM electrical connectors and set the wiring harness aside (Figure 1).
5. Remove the three (3) PCM bolts, then remove the PCM and discard it (Figure 1).
6. Install the new PCM. Tighten the mounting bolts to 35 in-lbs (4 N.m) (Figure 1).
7. Connect the four (4) PCM electrical connectors (Figure 1).
8. Install the washer fluid bottle filler neck. Tighten the bolt securely.
9. Install the speed control servo. Tighten the servo bracket bolts securely.
10. Connect the negative battery cable.
11. Continue with Section E - PCM/Vehicle Data Set-up.
NOTE:
To enhance customer satisfaction, remember to reset the clock when you have completed the service procedure.
2. Remove the speed control servo and set it aside.
3. Remove the washer fluid bottle filler neck bolt and set the filler neck aside.
4. Disconnect the four (4) PCM electrical connectors and set the wiring harness aside (Figure 1).
5. Remove the three (3) PCM bolts, then remove the PCM and discard it (Figure 1).
6. Install the new PCM. Tighten the mounting bolts to 35 in-lbs (4 N.m) (Figure 1).
7. Connect the four (4) PCM electrical connectors (Figure 1).
8. Install the washer fluid bottle filler neck. Tighten the bolt securely.
9. Install the speed control servo. Tighten the servo bracket bolts securely.
10. Connect the negative battery cable.
11. Continue with Section E - PCM/Vehicle Data Set-up.
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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.