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Home >> Mazda >> 2004 >> Tribute ES, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 483 (Symptom Troubleshooting [Engine Control System]) >> Electronic Engine Control (EEC) System >> Powertrain Control Hardware >> Keep Alive Random Access Memory (RAM)

Keep Alive Random Access Memory (RAM)

WARNING: This page is about a different car, the 2005 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.

The PCM stores information in Keep Alive RAM (a memory integrated circuit chip) about vehicle operating conditions, and then uses this information to compensate for component variability. Keep Alive RAM remains powered when the ignition switch is off so that this information is not lost.

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