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 MANAGEMENTTRANSMISSION CONTROL SYSTEMSTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESELECTRONIC PINION FACTOR
2003 Chrysler 300M V6-3.5L VIN M
Electronic Pinion Factor
2003 Chrysler 300M V6-3.5L VIN MSECTION Electronic Pinion Factor
ELECTRONIC PINION FACTOR WARNINGS (IF APPLICABLE)
The pinion factor must be set when replacing the PCM.
NOTE: The pinion factor is a fixed number and cannot be changed or updated in some vehicle applications. If the pinion factor is not set or incorrectly set, any speed related functions will not operate correctly i.e. speedometer, speed control, rolling door locks, other control modules will be affected that depend on speed information.
ELECTRONIC PINION FACTOR (IF APPLICABLE)
Using the following steps, the pinion factor can be checked and/or reset using the DRBIII:
1. Select Transmission system, then Miscellaneous functions, then Pinion Factor. The DRBIII will display the current tire size.
2. If the tire size is incorrect, press the Enter key and then select the correct size.
3. Press the Page Back key to exit the reset procedure.
Notes About Electronic Pinion Factor Features
The nature of the electronic pinion factor requires that certain features must be taken into consideration.
- If no pinion factor is stored in an installed PCM, the vehicle speedometer will not operate, engine speed will be limited to 2300 RPM, and catalyst damage may occur.
- Selecting a wrong tire size will cause the speedometer to be inaccurate and will also cause any speed related features to operate improperly.
NOTE: After replacing the PCM, you must reprogram pinion factor
The pinion factor must be set when replacing the PCM.
NOTE: The pinion factor is a fixed number and cannot be changed or updated in some vehicle applications. If the pinion factor is not set or incorrectly set, any speed related functions will not operate correctly i.e. speedometer, speed control, rolling door locks, other control modules will be affected that depend on speed information.
ELECTRONIC PINION FACTOR (IF APPLICABLE)
Using the following steps, the pinion factor can be checked and/or reset using the DRBIII:
1. Select Transmission system, then Miscellaneous functions, then Pinion Factor. The DRBIII will display the current tire size.
2. If the tire size is incorrect, press the Enter key and then select the correct size.
3. Press the Page Back key to exit the reset procedure.
Notes About Electronic Pinion Factor Features
The nature of the electronic pinion factor requires that certain features must be taken into consideration.
- If no pinion factor is stored in an installed PCM, the vehicle speedometer will not operate, engine speed will be limited to 2300 RPM, and catalyst damage may occur.
- Selecting a wrong tire size will cause the speedometer to be inaccurate and will also cause any speed related features to operate improperly.
NOTE: After replacing the PCM, you must reprogram pinion factor
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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.