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.
Pcm EEPROM
The PCM contains a data storage unit which can save critical data even when battery power is removed. This unit, the Electrically Erasable Programmable Read Only Memory (EEPROM) is used by the PCM to store TP Sensor/Idle Learned values, Transaxle Shift Adapt values, Transaxle Oil Life Index and Cruise Control Lash Learn. These values are stored in the EEPROM during the first 30 seconds after the key is turned off. Therefore, you should wait at least 30 seconds after key off before disconnecting the battery to allow these values to be stored in the EEPROM. The EEPROM is soldered into the PCM and cannot be serviced separately.
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.