2003 Chrysler 300M BaseFACTORY OEM SERVICE PROCEDURE

EEPROM Refresh Failure

WARNING: This page is about a different car, the 2002 Dodge Intrepid, 2002 Chrysler Intrepid, 2002 Chrysler Concorde, and 2002 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: After making any repairs, perform MEMORY HEATED SYSTEM VERIFICATION TESTΒ  under VERIFICATION TESTS.

Monitored & Set Condition

  1. When Monitored: With the ignition in the on position.
  2. Set Condition: The Memory Heated Seat Mirror Module has an internal EEPROM failure.

Possible Causes:

  • EEPROM Refresh Failure

Testing

  1. Replace Memory Heated Seat/Mirror Module (MHSMM). See MEMORY HEATED SEAT/MIRROR MODULEΒ  under REMOVAL & INSTALLATION.
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:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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